Desktop and Mobile development using RingQt

In this chapter we will learn how to use the Qt framework classes in our Ring applications to create Desktop and Mobile Applications.

The First GUI Application

In this example we will create an application to ask the user about his/her name. When the user type the name in the textbox then click on “Say Hello” button, the textbox value will be updated by adding “Hello ” to the name.

Load "guilib.ring"

MyApp = New qApp {

        win1 = new qWidget() {

                setwindowtitle("Hello World")
                setGeometry(100,100,370,250)

                label1 = new qLabel(win1) {
                        settext("What is your name ?")
                        setGeometry(10,20,350,30)
                        setalignment(Qt_AlignHCenter)
                }

                btn1 = new qpushbutton(win1) {
                        setGeometry(10,200,100,30)
                        settext("Say Hello")
                        setclickevent("pHello()")
                }

                btn1 = new qpushbutton(win1) {
                        setGeometry(150,200,100,30)
                        settext("Close")
                        setclickevent("pClose()")
                }

                lineedit1 = new qlineedit(win1) {
                        setGeometry(10,100,350,30)
                }

                show()
        }

        exec()
}

Func pHello
        lineedit1.settext( "Hello " + lineedit1.text())

Func pClose
        MyApp.quit()

Program Output:

At first we type the name in the textbox

Enter the name in the textbox

Then we click on the say hello button

Click on the button

Using Layout

The next example is just an upgrade to the previous application to use the vertical layout.

Load "guilib.ring"

MyApp = New qApp {

        win1 = new qWidget() {

                setwindowtitle("Hello World")
                setGeometry(100,100,400,130)
                label1 = new qLabel(win1) {
                        settext("What is your name ?")
                        setGeometry(10,20,350,30)
                        setalignment(Qt_AlignHCenter)
                }
                btn1 = new qpushbutton(win1) {
                        setGeometry(10,200,100,30)
                        settext("Say Hello")
                        setclickevent("pHello()")
                }
                btn2 = new qpushbutton(win1) {
                        setGeometry(150,200,100,30)
                        settext("Close")
                        setclickevent("pClose()")
                }
                lineedit1 = new qlineedit(win1) {
                        setGeometry(10,100,350,30)
                }
                layout1 = new qVBoxLayout() {
                        addwidget(label1)
                        addwidget(lineedit1)
                        addwidget(btn1)
                        addwidget(btn2)
                }
                win1.setlayout(layout1)
                show()
        }

        exec()

}

Func pHello
        lineedit1.settext( "Hello " + lineedit1.text())

Func pClose
        MyApp.quit()

The application during the runtime!

Vertical Layout

Using the QTextEdit Class

In this example we will use the QTextEdit Class

Load "guilib.ring"

New qApp {

        win1 = new qWidget() {

                setwindowtitle("QTextEdit Class")
                setGeometry(100,100,500,500)

                new qtextedit(win1) {
                        setGeometry(10,10,480,480)

                }

                show()
        }

        exec()
}

During the runtime we can paste rich text in the qtextedit widget

QTextEdit Class

Using the QListWidget Class

In this example we will use the QListWidget Class

Load "guilib.ring"

New qApp {

        win1 = new qWidget() {

                setGeometry(100,100,400,400)

                list1 = new qlistwidget(win1) {
                        setGeometry(150,100,200,200)
                        alist = ["one","two","three","four","five"]
                        for x in alist additem(x) next
                        setcurrentrow(3,2)
                        win1.setwindowtitle("Items Count : " + count() )
                }

                btn1 = new qpushbutton(win1) {
                        setGeometry(10,200,100,30)
                        settext("selected item")
                        setclickevent("pWork()")
                }

                btn2 = new qpushbutton(win1) {
                        setGeometry(10,240,100,30)
                        settext("Delete item")
                        setclickevent("pWork2()")
                }

                show()
        }

        exec()
}

func pWork
        btn1.settext(string(list1.currentrow()))

func pWork2
        list1 {
               takeitem(currentrow())
        }

The application during the runtime

QListWidget Class

Another Example:

Load "guilib.ring"

New qApp {

        win1 = new qWidget() {

                setGeometry(100,100,500,400)

                list1 = new qlistwidget(win1) {
                        setGeometry(150,100,200,200)
                        alist = ["one","two","three","four","five"]
                        for x in alist additem(x) next

                        setcurrentrow(3,2)
                        win1.setwindowtitle("Items Count : " + count() )
                }

                btn1 = new qpushbutton(win1) {
                        setGeometry(10,200,100,30)
                        settext("selected item")
                        setclickevent("pWork()")
                }

                btn2 = new qpushbutton(win1) {
                        setGeometry(10,240,100,30)
                        settext("Delete item")
                        setclickevent("pWork2()")
                }

                show()
        }

        exec()
}

func pWork

        nbrOfItems = list1.count()
        curItemNbr = list1.currentrow()
        curValue   = list1.item(list1.currentrow()).text()

        win1.setwindowtitle( "After Select - NbrOfItems: " + nbrOfItems +
                " CurItemNbr: " + curItemNbr + " CurValue: " + curValue )

        btn1.settext( string(list1.currentrow() ) + " --- " +
                      list1.item(list1.currentrow()).text() )



func pWork2
        list1 {
                takeitem(currentrow())

                nbrOfItems = count()
                curItemNbr = currentrow()
                curValue   = item(currentrow()).text()

                win1.setwindowtitle("After Delete - NbrOfItems: " + nbrOfItems +
                        " CurItemNbr: " + curItemNbr +" CurValue: " + curValue )
        }

Using QTreeView and QFileSystemModel

In this example we will learn how to use the QTreeView widget to represent the File System

Load "guilib.ring"

New qApp {

        win1 = New qWidget() {

                setwindowtitle("Using QTreeView and QFileSystemModel")
                setGeometry(100,100,500,400)

                New qtreeview(win1) {
                        setGeometry(00,00,500,400)
                        oDir = new QDir()
                        ofile = new QFileSystemModel()
                        ofile.setrootpath(oDir.currentpath())
                        setmodel(ofile)
                }

                show()
        }

        exec()
}

The application during the runtime

QTreeView and QFileSystemModel

Using QTreeWidget and QTreeWidgetItem

In this example we will learn about using the QTreeWidget and QTreeWidgetItem classes

Load "guilib.ring"

New qApp {

        win1 = new qWidget() {

                setwindowtitle("TreeWidget")
                setGeometry(100,100,400,400)

                layout1 = new qvboxlayout()

                tree1 = new qtreewidget(win1) {
                        setGeometry(00,00,400,400)
                        setcolumncount(1)
                        myitem = new qtreewidgetitem()
                        myitem.settext(0,"The First Step")
                        addtoplevelitem(myitem)
                        for  x = 1 to 10
                                myitem2 = new qtreewidgetitem()
                                myitem2.settext(0,"hello"+x)
                                myitem.addchild(myitem2)
                                for  y = 1 to 10
                                        myitem3 = new qtreewidgetitem()
                                        myitem3.settext(0,"hello"+x)
                                        myitem2.addchild(myitem3)
                                next
                        next
                        setheaderlabel("Steps Tree")
                }

                layout1.addwidget(tree1)
                setlayout(layout1)

                show()
        }

        exec()
}

The application during the runtime

QTreeWidget and QTreeWidgetItem

Using QComboBox Class

In this example we will learn about using the QComboBox class

Load "guilib.ring"

New qApp {

        win1 = new qWidget() {

                setwindowtitle("Using QComboBox")
                setGeometry(100,100,400,400)

                New QComboBox(win1) {
                        setGeometry(150,100,200,30)
                        alist = ["one","two","three","four","five"]
                        for x in aList additem(x,0) next
                }

                show()
        }

        exec()
}

The application during the runtime

QComboBox

Creating Menubar

In this example we will learn about using the QMenuBar class

Load "guilib.ring"

MyApp = New qApp {

        win1 = new qWidget() {

                setwindowtitle("Using QMenubar")
                setGeometry(100,100,400,400)

                menu1 = new qmenubar(win1) {
                        sub1 = addmenu("File")
                        sub2 = addmenu("Edit")
                        sub3 = addmenu("Help")
                        sub1 {
                                oAction = new qAction(win1) {
                                        settext("New")
                                }
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        settext("Open")
                                }
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        settext("Save")
                                }
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        settext("Save As")
                                }
                                addaction(oAction)
                                addseparator()
                                oAction = new qaction(win1) {
                                        settext("Exit")
                                        setclickevent("myapp.quit()")
                                }
                                addaction(oAction)
                        }
                        sub2 {
                                oAction = new qAction(win1) {
                                        settext("Cut")
                                }
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        settext("Copy")
                                }
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        settext("Paste")
                                }
                                addaction(oAction)
                                addseparator()
                                oAction = new qAction(win1) {
                                        settext("Select All")
                                }
                                addaction(oAction)
                        }
                        sub3 {
                                oAction = new qAction(win1) {
                                        settext("Reference")
                                }
                                addaction(oAction)
                                sub4 = addmenu("Sub Menu")
                                sub4 {
                                        oAction = new qAction(win1) {
                                                settext("Website")
                                        }
                                        addaction(oAction)
                                        oAction = new qAction(win1) {
                                                settext("Forum")
                                        }
                                        addaction(oAction)
                                        oAction = new qAction(win1) {
                                                settext("Blog")
                                        }
                                        addaction(oAction)
                                }
                                addseparator()
                                        oAction = new qAction(win1) {
                                                settext("About")
                                        }
                                        addaction(oAction)
                        }
                }
                show()
        }
        exec()
}

The application during the runtime

QMenuBar

Creating Toolbar

In this example we will learn about using the QToolBar class

Load "guilib.ring"

New qApp {

        win1 = new qMainWindow() {

                setwindowtitle("Using QToolbar")
                setGeometry(100,100,600,400)

                abtns = [
                                new qpushbutton(win1) { settext("Add") } ,
                                new qpushbutton(win1) { settext("Edit") } ,
                                new qpushbutton(win1) { settext("Find") } ,
                                new qpushbutton(win1) { settext("Delete") } ,
                                new qpushbutton(win1) { settext("Exit")
                                                        setclickevent("win1.close()") }
                        ]

                tool1 = new qtoolbar(win1) {
                        for x in abtns addwidget(x) addseparator() next
                        setmovable(true)
                        setGeometry(0,0,500,30)
                        setFloatable(true)
                }

                show()
        }

        exec()
}

The application during the runtime

QToolBar

Creating StatusBar

In this example we will learn about using the QStatusBar class

Load "guilib.ring"

New qApp {

        win1 = new qMainWindow() {

                setwindowtitle("Using QStatusbar")
                setGeometry(100,100,400,400)

                status1 = new qstatusbar(win1) {
                        showmessage("Ready!",0)
                }

                setstatusbar(status1)
                show()
        }

        exec()
}

The application during the runtime

QStatusBar

Using QDockWidget

In this example we will learn about using the QDockWidget class

Load "guilib.ring"

New qApp {

        win1 = new qMainWindow() {

                setwindowtitle("QDockWidget")
                setGeometry(100,100,400,400)

                label1 = new qlabel(win1) {
                        settext("Hello")
                        setGeometry(300,300,100,100)
                }

                label2 = new qlabel(win1) {
                        settext("How are you ?")
                        setGeometry(100,100,100,100)
                }

                dock1 = new qdockwidget(win1,0) {
                        setwidget(label1)
                        SetAllowedAreas(1)
                }

                dock2 = new qdockwidget(win1,0) {
                        setwidget(label2)
                        SetAllowedAreas(2)
                }

                adddockwidget(Qt_LeftDockWidgetArea,dock1,Qt_Horizontal)
                adddockwidget(Qt_LeftDockWidgetArea,dock2,Qt_Vertical)

                show()
        }
        exec()
}

The application during the runtime

QDockWidget

Using QTabWidget

In this example we will learn about using the QTabWidget class

Load "guilib.ring"

New qApp {

        win1 = new qMainWindow() {

                setwindowtitle("Using QTabWidget")
                setGeometry(100,100,400,400)

                page1 = new qwidget() {
                        new qpushbutton(page1) {
                                settext("The First Page")
                        }
                }

                page2 = new qwidget() {
                        new qpushbutton(page2) {
                                settext("The Second Page")
                        }
                }

                page3 = new qwidget() {
                        new qpushbutton(page3) {
                                settext("The Third Page")
                        }
                }

                tab1 = new qtabwidget(win1) {
                        inserttab(0,page1,"Page 1")
                        inserttab(1,page2,"Page 2")
                        inserttab(2,page3,"Page 3")
                        setGeometry(100,100,400,400)
                }

                status1 = new qstatusbar(win1) {
                        showmessage("Ready!",0)
                }

                setstatusbar(status1)
                showMaximized()
        }

        exec()
}

The application during the runtime

QTabWidget

Using QTableWidget

In this example we will learn about using the QTableWidget class

Load "guilib.ring"

New qApp {

        win1 = new qMainWindow() {

                setGeometry(100,100,1100,370)
                setwindowtitle("Using QTableWidget")

                Table1 = new qTableWidget(win1) {

                        setrowcount(10) setcolumncount(10)
                        setGeometry(0,0,800,400)
                        setselectionbehavior(QAbstractItemView_SelectRows)

                        for x = 1 to 10
                                for y = 1 to 10
                                        item1 = new qtablewidgetitem("R"+X+"C"+Y)
                                        setitem(x-1,y-1,item1)
                                next
                        next

                }

                setcentralwidget(table1)
                show()

        }

        exec()
}

The application during the runtime

QTableWidget

Using QProgressBar

In this example we will learn about using the QProgressBar class

Load "guilib.ring"

New qApp {
        win1 = new qMainWindow() {

                setGeometry(100,100,600,150)
                setwindowtitle("Using QProgressBar")

                for x = 10 to 100 step 10
                        new qprogressbar(win1) {
                                setGeometry(100,x,350,30)
                                setvalue(x)
                        }
                next

                show()
        }
        exec()
}

The application during the runtime

QProgressBar

Using QSpinBox

In this example we will learn about using the QSpinBox class

Load "guilib.ring"

New qApp {
        win1 = new qMainWindow() {
                setGeometry(100,100,450,260)
                setwindowtitle("Using QSpinBox")
                        new qspinbox(win1) {
                                setGeometry(50,100,350,30)
                                setvalue(50)
                        }
                show()
        }
        exec()
}

The application during the runtime

QSpinBox

Using QSlider

In this example we will learn about using the QSlider class

Load "guilib.ring"

New qApp {

        win1 = new qMainWindow() {

                setGeometry(100,100,500,400)
                setwindowtitle("Using QSlider")

                new qslider(win1) {
                        setGeometry(100,100,50,130)
                        settickinterval(50)
                }

                new qslider(win1) {
                        setGeometry(100,250,250,30)
                        settickinterval(50)
                        setorientation(Qt_Horizontal)
                }

                show()

        }

        exec()
}

The application during the runtime

QSlider

Using QDateEdit

In this example we will learn about using the QDateEdit class

Load "guilib.ring"

New qApp {
        win1 = new qMainWindow() {
                setwindowtitle("Using QDateEdit")
                setGeometry(100,100,250,100)
                new qdateedit(win1) {
                        setGeometry(20,40,220,30)
                }
                show()
        }
        exec()
}

The application during the runtime

QDateEdit

Using QDial

In this example we will learn about using the QDial class

Load "guilib.ring"

New qApp {
        win1 = new qMainWindow() {
                setGeometry(100,100,450,500)
                setwindowtitle("Using QDial")
                new qdial(win1) {
                        setGeometry(100,100,250,300)
                }
                show()
        }
        exec()
}

The application during the runtime

QDial

Another Example

Load "guilib.ring"

New qApp {
                 win1 = new qMainWindow()
                {
                        setGeometry(100,100,450,500)
                        setwindowtitle("Using QDial")
                        button1 = new QPushButton(win1){
                                setGeometry(100,350,100,30)
                                settext("Increment")
                                setClickEvent("pIncrement()")
                        }

                        button2 = new QPushButton(win1){
                                setGeometry(250,350,100,30)
                                settext("Decrement")
                                setClickEvent("pDecrement()")
                        }
                        pdial = new qdial(win1) {
                                setGeometry(100,50,250,300)
                                setNotchesVisible(true)
                                setValue(50)
                                SetValueChangedEvent("pDialMove()")
                        }
                        lineedit1 = new qlineedit(win1) {
                                setGeometry(200,400,50,30)
                                setalignment(Qt_AlignHCenter)
                                settext(string(pdial.value()))
                                setreturnPressedEvent("pPress()")
                        }
                        show()
                  }
        exec()
}

func pIncrement
        pdial{val=value()}
        pdial.setvalue(val+1)
        lineedit1{settext(string(val+1))}

func pDecrement
        pdial{val=value()}
        pdial.setvalue(val-1)
        lineedit1{settext(string(val-1))}

func pPress
        lineedit1{val=text()}
        pdial.setvalue(number(val))

func pDialMove
        lineedit1.settext(""+pdial.value())
QDial - Second Example

Using QWebView

In this example we will learn about using the QWebView class

Load "guilib.ring"

New qApp {
        win1 = new qMainWindow() {
                setwindowtitle("QWebView")
                myweb = new qwebview(win1) {
                        setGeometry(10,10,600,600)
                        loadpage(new qurl("http://google.com"))
                }
                setcentralwidget(myweb)
                showMaximized()
        }
        exec()
}

The application during the runtime

QWebView

Using QCheckBox

In this example we will learn about using the QCheckBox class

Load "guilib.ring"

New qApp {
        win1 = new qMainWindow() {
                setwindowtitle("Using QCheckBox")
                new qcheckbox(win1) {
                        setGeometry(100,100,100,30)
                        settext("New Customer!")
                }
                showMaximized()
        }
        exec()
}

The application during the runtime

QCheckBox

Another Example:

Load "guilib.ring"

New qApp {
        win1 = new qMainWindow() {
                setGeometry(100,100,400,300)
                setwindowtitle("Using QCheckBox")

                ### 0-Unchecked  1-Checked

                CheckBox = new qcheckbox(win1) {
                        setGeometry(100,100,160,30)
                        settext("New Customer!")
                        setclickedEvent("HandleClickEvent()")
                }

                show()
        }
        exec()
}

Func HandleClickEvent

    if CheckBox.isChecked() = 1
        CheckBox.settext("New Customer. Check 1-ON")
    else
        CheckBox.settext("New Customer. Check 0-OFF")
    ok

Using QRadioButton and QButtonGroup

In this example we will learn about using the QRadioButton and QButtonGroup classes

Load "guilib.ring"

New qApp {

        win1 = new qMainWindow() {

                setwindowtitle("Using QRadioButton")

                new qradiobutton(win1) {
                        setGeometry(100,100,100,30)
                        settext("One")
                }
                new qradiobutton(win1) {
                        setGeometry(100,150,100,30)
                        settext("Two")
                }
                new qradiobutton(win1) {
                        setGeometry(100,200,100,30)
                        settext("Three")
                }


                group2  = new qbuttongroup(win1) {
                        btn4 = new qradiobutton(win1) {
                                setGeometry(200,150,100,30)
                                settext("Four")
                        }
                        btn5 = new qradiobutton(win1) {
                                setGeometry(200,200,100,30)
                                settext("Five")
                        }
                        addbutton(btn4,0)
                        addbutton(btn5,0)

                }

                showMaximized()

        }
        exec()
}

The application during the runtime

QRadioButton and QButtonGroup classes

QVideoWidget and QMediaPlayer

In this example we will learn about using the QVideoWidget and QMediaPlayer classes to play a group of movies from different positions at the same time

Load "guilib.ring"

New qApp {

        win1 = new qMainWindow() {

                setwindowtitle("QVideoWidget")

                btn1 = new qpushbutton(win1)    {
                        setGeometry(0,0,100,30)
                        settext("play")
                        setclickevent("player.play() player2.play()
                                                   player3.play() player4.play()")
                }

                videowidget = new qvideowidget(win1) {
                        setGeometry(50,50,600,300)
                        setstylesheet("background-color: black")
                }

                videowidget2 = new qvideowidget(win1) {
                        setGeometry(700,50,600,300)
                        setstylesheet("background-color: black")
                }


                videowidget3 = new qvideowidget(win1) {
                        setGeometry(50,370,600,300)
                        setstylesheet("background-color: black")
                }

                videowidget4 = new qvideowidget(win1) {
                        setGeometry(700,370,600,300)
                        setstylesheet("background-color: black")
                }

                player = new qmediaplayer() {
                        setmedia(new qurl("1.mp4"))
                        setvideooutput(videowidget)
                        setposition(35*60*1000)

                }

                player2 = new qmediaplayer() {
                        setmedia(new qurl("2.mp4"))
                        setvideooutput(videowidget2)
                        setposition(23*60*1000)
                }

                player3 = new qmediaplayer() {
                        setmedia(new qurl("3.mp4"))
                        setvideooutput(videowidget3)
                        setposition(14.22*60*1000)
                }

                player4 = new qmediaplayer() {
                        setmedia(new qurl("4.avi"))
                        setvideooutput(videowidget4)
                        setposition(8*60*1000)
                }

                showfullscreen()

        }

        exec()

}

The application during the runtime

QVideoWidget

Using QFrame

In this example we will learn about using the QFrame class

Load "guilib.ring"

New qApp {
        win1 = new qMainWindow() {
                setwindowtitle("Using QFrame")
                for x = 0 to 10
                        frame1 = new qframe(win1,0) {
                                setGeometry(100,20+50*x,400,30)
                                setframestyle(QFrame_Raised | QFrame_WinPanel)
                        }
                next
                showMaximized()
        }
        exec()
}

The application during the runtime

QFrame

Display Image using QLabel

In this example we will learn about displaying an image using the QLabel widget

Load "guilib.ring"

New qApp {
        win1 = new qMainWindow() {
                setwindowtitle("QLabel - Display image")
                new qlabel(win1) {
                        image = new qpixmap("b:/mahmoud/photo/advice.jpg")
                        setpixmap(image)
                        setGeometry(0,0,image.width(),image.height())
                }
                showMaximized()
        }
        exec()
}

The application during the runtime

Display Image

QLineEdit Events and QMessageBox

In this example we will learn about using QLineEdit Events and displaying a Messagebox

Load "guilib.ring"

MyApp = New qApp {

        win1 = new qWidget() {

                setwindowtitle("Welcome")
                setGeometry(100,100,400,300)


                label1 = new qLabel(win1) {
                        settext("What is your name ?")
                        setGeometry(10,20,350,30)
                        setalignment(Qt_AlignHCenter)
                }

                btn1 = new qpushbutton(win1) {
                        setGeometry(10,200,100,30)
                        settext("Say Hello")
                        setclickevent("pHello()")
                }

                btn1 = new qpushbutton(win1) {
                        setGeometry(150,200,100,30)
                        settext("Close")
                        setclickevent("pClose()")
                }

                lineedit1 = new qlineedit(win1) {
                        setGeometry(10,100,350,30)
                        settextchangedevent("pChange()")
                        setreturnpressedevent("penter()")
                }

                show()
        }

        exec()
}

Func pHello
        lineedit1.settext( "Hello " + lineedit1.text())

Func pClose
        MyApp.quit()

Func pChange
        win1 { setwindowtitle( lineedit1.text() ) }

Func pEnter
        new qmessagebox(win1) {
                setwindowtitle("Thanks")
                settext("Hi " + lineedit1.text() )
                setstylesheet("background-color : white")
                show()
        }

The application during the runtime

qLineEdit events and qMessagebox qLineEdit events and qMessagebox

Other Widgets Events

Each Qt signal can be used in RingQt, just add Set before the signal name and add event after the signal name to get the method that can be used to determine the event code.

For example the QProgressBar class contains a signal named valueChanged() To use it just use the function setValueChangedEvent()

Example:

Load "guilib.ring"

New qApp {
        win1 = new qMainWindow() {

                setwindowtitle("QProgressBar valueChanged Event")

                progress1 = new qprogressbar(win1) {
                        setGeometry(100,100,350,30)
                        setvalue(10)
                        setvaluechangedevent("pChange()")
                }

                new qpushbutton(win1) {
                        setGeometry(10,10,100,30)
                        settext("increase")
                        setclickevent("pIncrease()")
                }

                showMaximized()

        }

        exec()
}

func pIncrease
        progress1 { setvalue(value()+1)  }

func pchange
        win1.setwindowtitle("value : " + progress1.value() )

The application during the runtime

qProgressBar valueChanged event

Another example for the stateChanged event of the QCheckBox class

Load "guilib.ring"

New qApp {
        win1 = new qMainWindow() {
                setwindowtitle("QCheckBox")
                new qcheckbox(win1) {
                        setGeometry(100,100,100,30)
                        settext("New Customer!")
                        setstatechangedevent("pchange()")
                }
                showMaximized()
        }
        exec()
}

Func pChange

        new qMessageBox(Win1) {
                setWindowTitle("Checkbox")
                settext("State Changed!")
                show()
        }

The application during the runtime

qProgressBar valueChanged event

Using the QTimer Class

In this example we will learn about using the QTimer class

Load "guilib.ring"

new qApp {
        win1 = new qwidget() {
                setgeometry(100,100,200,70)
                setwindowtitle("Timer")
                label1 = new qlabel(win1) {
                        setgeometry(10,10,200,30)
                        settext(thetime())
                }
                new qtimer(win1) {
                        setinterval(1000)
                        settimeoutevent("pTime()")
                        start()
                }
                show()
        }
        exec()
}

func ptime
        label1.settext(thetime())

Func thetime
        return "Time : " + Time()

The application during the runtime

QTimer Class

Using QProgressBar and Timer

In this example we will learn about using the “animated” QProgressBar class and Timer

###------------------------------------
### ProgressBar and Timer Example

Load "guilib.ring"

new qApp
{
    win1 = new qwidget()
    {
        setgeometry(100,100,400,100)
        setwindowtitle("Timer and ProgressBar")

        LabelMan = new qlabel(win1)
        {
            setgeometry(10,10,200,30)
            settext(theTime())          ### ==>> func
        }

        TimerMan = new qtimer(win1)
        {
            setinterval(1000)
            settimeoutevent("pTime()")  ### ==>> func
            start()
        }

        BarMan = new qprogressbar(win1)
        {
            setGeometry(100,50,300,10)  ###  Position X y, Length, Thickness
            setvalue(0)                 ###  Percent filled
        }

        show()
    }
    exec()
}

func pTime
        LabelMan.settext(theTime())     ### ==>> func

        Increment = 10
        if BarMan.value() >= 100        ### ProgressBar start over.
            BarMan.setvalue(0)
        ok
        BarMan{ setvalue(value() + Increment) }

Func theTime
        return "Time : " + Time()
QProgressBar

Display Scaled Image using QLabel

In this example we will learn about displaying and scaling an image so that it looks “animated” using the QLabel widget

Load "guilib.ring"

#----------------------------------------------------
# REQUIRES: image = "C:\RING\bin\stock.jpg"

# imageStock: start dimensions for growing image

imageW = 200 ;  imageH = 200 ; GrowBy = 4

###----------------------------------------------------
### Window and Box Size dimensions

WinWidth = 1280 ; WinHeight = 960
BoxWidth = WinWidth -80 ; BoxHeight = WinHeight -80

###----------------------------------------------------

New qapp {

        win1 = new qwidget() {

                setgeometry(50,50, WinWidth,WinHeight)
                setwindowtitle("Animated Image - Display Image Scaled and Resized")

                imageStock = new qlabel(win1) {

                        image = new qpixmap("C:\RING\bin\stock.jpg")
                        AspectRatio = image.width() / image.height()

                        imageW = 200
                        imageH = imageH / AspectRatio

                        ### Size-H, Size-V, Aspect, Transform
                        setpixmap(image.scaled(imageW , imageH ,0,0))

                        PosLeft = (BoxWidth  - imageW ) / 2
                        PosTop  = (BoxHeight - imageH ) / 2
                        setGeometry(PosLeft,PosTop,imageW,imageH)

                }

                TimerMan = new qtimer(win1) {
                        setinterval(100)            ### interval 100 millisecs.
                        settimeoutevent("pTime()")  ### ==>> func
                        start()
                }

                show()
        }
exec()
}


###------------------------------------------------------
### Fuction TimerMan: calling interval 100 milliseconds

func pTime

        ### Stop Timer when image is size of Window area
        if imageW > BoxWidth
                TimerMan.stop()
                imageStock.clear()      ### Will clear the image
        ok

        ### Grow image
        imageW += GrowBy
        imageH  = imageW / AspectRatio

        ### Scaled Image: Size-H, Size-V, Aspect, Transform
        imageStock.setpixmap(image.scaled(imageW , imageH ,0,0))

        ### Center the image
        PosLeft = (WinWidth  - imageW ) / 2
        PosTop  = (WinHeight - imageH ) / 2
        imageStock.setGeometry(PosLeft,PosTop,imageW,imageH)

Using the QFileDialog Class

Example

Load "guilib.ring"

New qapp {
        win1 = new qwidget() {
                setwindowtitle("open file")
                setgeometry(100,100,400,400)
                new qpushbutton(win1) {
                        setgeometry(10,10,200,30)
                        settext("open file")
                        setclickevent("pOpen()")
                }
                show()
        }
        exec()
}

Func pOpen
        new qfiledialog(win1) {
                cName = getopenfilename(win1,"open file","c:\","source files(*.ring)")
                win1.setwindowtitle(cName)
        }

The application during the runtime

QFileDialog Class

Drawing using QPainter

In this example we will learn about drawing using the QPainter class

Load "guilib.ring"
New qapp {
        win1 = new qwidget() {
                setwindowtitle("Drawing using QPainter")
                setgeometry(100,100,500,500)
                label1 = new qlabel(win1) {
                        setgeometry(10,10,400,400)
                        settext("")
                }
                new qpushbutton(win1) {
                        setgeometry(200,400,100,30)
                        settext("draw")
                        setclickevent("draw()")
                }

                show()
        }
        exec()
}

Func draw
                p1 = new qpicture()
                color = new qcolor() {
                        setrgb(0,0,255,255)
                }
                pen = new qpen() {
                        setcolor(color)
                        setwidth(10)
                }
                new qpainter() {
                        begin(p1)
                        setpen(pen)
                        drawline(500,150,950,450)
                        drawline(950,550,500,150)
                        endpaint()
                }
                label1 { setpicture(p1) show() }

The application during the runtime

QPainter Class

Printing using QPrinter

In this example we will learn how to print to PDF file using QPrinter

Load "guilib.ring"
new qApp {
        win1 = new qwidget() {
                setwindowtitle("Printer")
                setgeometry(100,100,500,500)
                myweb = new qwebview(win1) {
                        setgeometry(100,100,1000,500)
                        loadpage(new qurl("http://google.com"))
                }
                new qpushbutton(win1) {
                        setGeometry(20,20,100,30)
                        settext("Print")
                        setclickevent("print()")
                }
                showmaximized()
        }
        exec()
}

func print
        printer1 = new qPrinter(0) {
                setoutputformat(1)      # 1 = pdf
                setoutputfilename("test.pdf")
                painter = new qpainter() {
                        begin(printer1)
                        myfont = new qfont("Times",50,-1,0)
                        setfont(myfont)
                        drawtext(100,100,"test")
                        printer1.newpage()
                        drawtext(100,100,"test2")
                        endpaint()
                }
        }

        printer1 = new qPrinter(0) {
                setoutputformat(1)
                setoutputfilename("test2.pdf")
                myweb.print(printer1)
                myweb.show()
        }

        system ("test.pdf")
        system ("test2.pdf")

Creating More than one Window

The next example demonstrates how to create more than one window

Load "guilib.ring"
app1 = new qapp {
        win1 = new qwidget() {
                setwindowtitle("First")
                setgeometry(100,100,500,500)

                new qpushbutton(win1) {
                        setgeometry(100,100,100,30)
                        settext("close")
                        setclickevent("app1.quit()")
                }

                new qpushbutton(win1) {
                        setgeometry(250,100,100,30)
                        settext("Second")
                        setclickevent("second()")
                }

                showmaximized()
        }
        exec()
}

func second
        win2 = new qwidget() {
                setwindowtitle("Second")
                setgeometry(100,100,500,500)
                setwindowflags(Qt_dialog)
                show()
        }

The application during the runtime

More than one window

Playing Sound

Example:

Load "guilib.ring"
new qapp {
        win1 = new qwidget() {
                setwindowtitle("play sound!") show()
        }
        new qmediaplayer()      {
                setmedia(new qurl("footstep.wav"))
                setvolume(50) play()
        }
        exec()
}

Using the QColorDialog Class

Example:

Load "guilib.ring"

oApp = new myapp { start() }

Class MyApp

        oColor  win1

        Func start

                myapp = new qapp

                win1 = new qMainWindow() {
                        setwindowtitle("Color Dialog")
                        setgeometry(100,100,400,400)
                }

                new qpushbutton(win1) {
                        setgeometry(10,10,100,30)
                        settext("Get Color")
                        setclickevent("oApp.pColor()")
                }

                win1.show()
                myapp.exec()


        Func pColor
                myobj = new qcolordialog()
                aColor = myobj.GetColor()
                r=acolor[1] g=acolor[2] b=acolor[3]
                win1.setstylesheet("background-color: rgb("+r+", " + g+ "," + b + ")")

The application during the runtime

QColorDialog Class

Using qLCDNumber Class

In this example we will learn about using the qLCDNumber class

Load "guilib.ring"

New qApp
{
        win1 = new qWidget()
        {
                setwindowtitle("LCD Number")
                setgeometry(100,100,250,120)

                new qLCDNumber(win1)
                {
                        setgeometry(10,10,100,40)
                        display(100)

                }

                new qLCDNumber(win1)
                {
                        setgeometry(10,60,100,40)
                        display(80)

                }

                show()
        }

        exec()
}

The application during the runtime

QLCDNumber Class

Movable Label Example

Load "guilib.ring"

new qApp {

        win1 = new qWidget()
        {

                label1 = new qLabel(win1)
                {
                        setText("Welcome")
                        setgeometry(10,10,200,50)
                        setstylesheet("color: purple ; font-size: 30pt;")
                }

                new qTimer(win1)
                {
                        setInterVal(10)
                        setTimeOutEvent("pMove()")
                        start()
                }

                setWindowTitle("Movable Label")
                setgeometry(100,100,600,80)
                setStyleSheet("background-color: white;")
                show()

        }

        exec()
}

Func pMove
        label1
        {
                move(x()+1,y())
                if x() > 600
                        move(10,y())
                ok
        }

The application during the runtime

Movable label

QMessagebox Example

In this section we will learn how to check the output of the Message box

Load "guilib.ring"

new qApp {
        win1 = new qWidget()
        {
                label1 = new qpushbutton(win1)
                {
                        setText("Test")
                        setgeometry(10,10,200,50)
                        setstylesheet("color: purple ; font-size: 30pt;")
                        setclickevent("pWork()")
                }
                setWindowTitle("Messagebox")
                setgeometry(100,100,600,80)
                setStyleSheet("background-color: white;")
                show()
        }
        exec()
}

func pWork
        new qmessagebox(win1)
        {
                setwindowtitle("messagebox title")
                settext("messagebox text")
                setInformativeText("Do you want to save your changes?")
                setstandardbuttons(QMessageBox_Yes | QMessageBox_No | QMessageBox_Close)
                result = exec()
                win1 {
                        if result = QMessageBox_Yes
                                setwindowtitle("Yes")
                        but result = QMessageBox_No
                                setwindowtitle("No")
                        but result = QMessageBox_Close
                                setwindowtitle("Close")
                        ok
                }
        }

The application during the runtime

QMessageBox output

Using QInputDialog Class

In the next example we will learn about using the QInputDialog class

Load "guilib.ring"

New QApp {

        Win1 = New QWidget () {

                SetGeometry(100,100,400,400)
                SetWindowTitle("Input Dialog")

                New QPushButton(win1)
                {

                        SetText ("Input Dialog")
                        SetGeometry(100,100,100,30)
                        SetClickEvent("pWork()")
                }

                Show()
        }

        exec()
}

Func pWork
        oInput = New QInputDialog(win1)
        {
                setwindowtitle("What is your name?")
                setgeometry(100,100,400,50)
                setlabeltext("User Name")
                settextvalue("Mahmoud")
                lcheck = exec()
                if lCheck win1.setwindowtitle(oInput.textvalue()) ok
        }

The application during the runtime

QInputDialog

Dialog Functions

We have the next functions

SetDialogIcon(cIconFile)
MsgInfo(cTitle,cMessage)
ConfirmMsg(cTitle,cMessage) --> lResult
InputBox(cTitle,cMessage) --> cValue
InputBoxInt(cTitle,cMessage) --> nValue
InputBoxNum(cTitle,cMessage) --> nValue
InputBoxPass(cTitle,cMessage) --> cValue

Example

load "guilib.ring"

new qApp
{
        SetDialogIcon("notepad.png")
        msginfo(:Ring,:Welcome)
        see confirmMsg(:Ring,"Are you sure?") + nl
        see InputBoxNum(:Ring,"Enter Number(double) :") + nl
        see InputBox(:Ring,"Enter Value :") + nl
        see InputBoxInt(:Ring,"Enter Number(int)") + nl
        see InputBoxPass(:Ring,"Enter Password") +nl
}

KeyPress and Mouse Move Events

In this example we will learn how to use the Events Filter to know about KeyPress and Mouse Move Events

Load "guilib.ring"

new qApp {

        win1 = new qWidget()
        {
                setWindowTitle("Test using Event Filter!")
                setGeometry(100,100,400,400)
                setmousetracking(true)
                myfilter = new qallevents(win1)
                myfilter.setKeyPressEvent("pWork()")
                myfilter.setMouseButtonPressevent("pClick()")
                myfilter.setmousemoveevent("pMove()")

                installeventfilter(myfilter)

                show()
        }

        exec()
}

func pWork
        win1.setwindowtitle('KeyPress! : ' + myfilter.getkeycode())

func pClick
        new qmessagebox(win1) {
                setgeometry(100,100,400,100)
                setwindowtitle("click event!")
                settext("x : " + myfilter.getx() +
                        " y : " + myfilter.gety() + " button : " +
                         myfilter.getbutton() )
                show()
        }

func pMove
        win1.setwindowtitle("Mouse Move , X : " + myfilter.getx() +
                            " Y : " + myfilter.gety() )

The application during the runtime

KeyPress and Mouse Move Events

Moving Objects using the Mouse

In the next example we will learn how to program movable objects where the user can move a label

Load "guilib.ring"

lPress = false
nX = 0
nY = 0

new qApp {

        win1 = new qWidget()
        {

                setWindowTitle("Move this label!")
                setGeometry(100,100,400,400)
                setstylesheet("background-color:white;")

                Label1 = new qLabel(Win1){
                        setGeometry(100,100,200,50)
                        setText("Welcome")
                        setstylesheet("font-size: 30pt")
                        myfilter = new qallevents(label1)
                        myfilter.setEnterevent("pEnter()")
                        myfilter.setLeaveevent("pLeave()")
                        myfilter.setMouseButtonPressEvent("pPress()")
                        myfilter.setMouseButtonReleaseEvent("pRelease()")
                        myfilter.setMouseMoveEvent("pMove()")
                        installeventfilter(myfilter)
                }

                show()
        }

        exec()
}

Func pEnter
        Label1.setStyleSheet("background-color: purple; color:white;font-size: 30pt;")

Func pLeave
        Label1.setStyleSheet("background-color: white; color:black;font-size: 30pt;")

Func pPress
        lPress = True
        nX = myfilter.getglobalx()
        ny = myfilter.getglobaly()

Func pRelease
        lPress = False
        pEnter()

Func pMove
        nX2 = myfilter.getglobalx()
        ny2 = myfilter.getglobaly()
        ndiffx = nX2 - nX
        ndiffy = nY2 - nY
        if lPress
                Label1 {
                        move(x()+ndiffx,y()+ndiffy)
                        setStyleSheet("background-color: Green;
                                 color:white;font-size: 30pt;")
                        nX = nX2
                        ny = nY2
                }

        ok

The application during the runtime

Moving object using the mouse Moving object using the mouse Moving object using the mouse

Inheritance from GUI Classes

Example :

Load "guilib.ring"

New MyWindow()

new qApp { exec() }

class mywindow from qwidget
        Func init
                super.init()
                setwindowtitle("First Window")
                setgeometry(100,100,400,400)
                setstylesheet("background-color: purple;")
                settooltip("my first window!")
                show()

The application during the runtime

Inheritance from GUI Classes

Using QDesktopWidget Class

In the next example we will learn about using the QDesktopWidget class

Load "guilib.ring"

New qApp {
        win1 = New qWidget()
        {
                resize(400,400)
                btn1 = new qPushbutton(win1)
                {
                        setText("Center")
                        move(100,100)
                        resize(100,30)
                        setClickEvent("pCenter()")
                }

                Show()
        }

        exec()
}

Func pCenter
        oDesktop  = new qDesktopWidget()
        oRect = oDesktop.screenGeometry( oDesktop.primaryScreen()  )
        win1.move((oRect.width()-win1.width()) /2 , (oRect.Height()-win1.Height())/2 )
        win1.show()

The application during the runtime

Using QDesktopWidget Class

Rotate Text

The next example rotate text using a Timer.

Load "guilib.ring"

nAngle  = 0

New qapp {
        win1 = new qwidget() {
                setwindowtitle("Rotate Text")
                resize(800,600)
                label1 = new qlabel(win1) {
                        settext("")
                        myfilter = new qallevents(win1)
                        myfilter.setMouseButtonPressevent("pClick()")
                        installeventfilter(myfilter)
                }
                new qtimer(win1) {
                        setinterval(50)
                        settimeoutevent("pTime()")
                        start()
                }
                pDraw()
                L1 = new qVBoxLayout() { AddWidget(Label1) } SetLayout(L1)
                showMaximized()
        }
        exec()
}

Func pDraw
        p1 = new qpicture()
        color = new qcolor() {
                setrgb(0,0,255,255)
        }
        pen = new qpen() {
                setcolor(color)
                setwidth(50)
        }
        painter = new qpainter() {
                begin(p1)
                        setpen(pen)
                        myfont = font()
                        myfont.setpointsize(50)
                        setfont(myfont)
                        rotate(nAngle)
                        drawtext(350,0*nAngle,"welcome")
                        drawtext(0,0*nAngle,"welcome")
                endpaint()
                  }
        label1 {
                setpicture(p1)
                show()
        }

Func pClick
        win1 { setwindowtitle("Click Event") }

Func pTime
        nAngle++
        if nAngle = 90
                nAngle = 10
        ok
        pDraw()

The application during the runtime

Rotate Text Example

Change Focus

The next example change the focus using the ENTER key.

load "guilib.ring"

new qApp {
        win = new qWidget() {
                resize(600,600)
                SetWindowTitle("Change Focus")
                text1 = new qLineEdit(win)
                text2 = new qLineEdit(win)
                text3 = new qLineEdit(win)
                text4 = new qLineEdit(win)
                layout1 = new qVBoxLayout() {
                        AddWidget(text1)
                        AddWidget(text2)
                        AddWidget(text3)
                        AddWidget(text4)

                }
                setLayout(Layout1)
                aList = [text1,text2,text3,text4]
                oFilter = new qallevents(win)
                oFilter.setKeyPressEvent("pWork()")
                installeventfilter(oFilter)
                show()
        }
        exec()
}

func pWork
        nCode =  oFilter.getkeycode()
        if nCode = 16777220     # ENTER Key
                for x=1 to len(aList)
                        if aList[x].HasFocus()
                                t = x+1
                                if t > len(aList) t=1 ok
                                aList[t].SetFocus(0)
                                exit
                        ok
                next
        ok

Regular Expressions

The next example uses the Regular Expressions classes.

load "guilib.ring"

new qApp
{
        see "Using Regular Expressions" + nl

        exp = new qregularexpression() {
                setPattern("\d\d \w+")
                see pattern() + nl
                match = match("33 one",0,0,0)
                see match.hasmatch() + nl
                match = match("3 one",0,0,0)
                see match.hasmatch() + nl
                match = match("welcome 11 one",0,0,0)
                see match.hasmatch() + nl
                matched = match.captured(0)
                see matched + nl
        }
        exp = new qregularexpression() {
                setPattern("^(\d\d)/(\d\d)/(\d\d\d\d)$")
                see pattern() + nl
                match = match("08/12/1985",0,0,0)
                see match.hasmatch() + nl
                day = match.captured(1)
                month = match.captured(2)
                year = match.captured(3)
                see day + nl + month + nl + year + nl
                see  "(" + match.capturedStart(1) + "," + match.capturedEnd(1)+ ")" + nl
                see  "(" + match.capturedStart(2) + "," + match.capturedEnd(2)+ ")" + nl
                see  "(" + match.capturedStart(3) + "," + match.capturedEnd(3)+ ")" + nl
        }

}

Output

Using Regular Expressions
\d\d \w+
1
0
1
11 one
^(\d\d)/(\d\d)/(\d\d\d\d)$
1
08
12
1985
(0,2)
(3,5)
(6,10)

Simple Client and Server Example

In this section we will learn about creating simple Client and Server Application

Load "guilib.ring"

new qApp {
        oClient = new Client { client() }
        oServer = new Server { server() }
        exec()
}

Class Client

        win1 lineedit1  cOutput=""
        oTcpSocket

        func client

                win1 = new qwidget()

                new qpushbutton(win1) {
                        setgeometry(50,50,100,30)
                        settext("connect")
                        setclickevent("oClient.Connect()")
                }

                lineedit1 = new qtextedit(win1) {
                        setGeometry(150,50,200,300)
                }

                win1 {
                        setwindowtitle("client")
                        setgeometry(10,100,400,400)
                        show()
                }

        func connect
                cOutput = "Connect to host 127.0.0.1 port 9999" + nl
                lineedit1.settext(cOutput)
                oTcpSocket = new qTcpSocket(win1) {
                        setconnectedevent("oClient.pConnected()")
                        setreadyreadevent("oClient.pRead()")
                        connecttohost("127.0.0.1",9999,3,0)
                        waitforconnected(5000)
                }

        func pConnected

                cOutput += "Connected!" + nl
                lineedit1.settext(cOutput)

        func pRead

                cOutput += "Ready Read!" + nl
                lineedit1.settext(cOutput)
                cOutput += oTcpSocket.readall().data() + nl
                lineedit1.settext(cOutput)

Class Server

        win1 lineedit1
        oTcpServer oTcpClient
        cOutput = ""

        func server

                win1 = new qwidget()

                lineedit1 = new qtextedit(win1) {
                        setGeometry(150,50,200,300)
                }

                win1 {
                        setwindowtitle("Server")
                        setgeometry(450,100,400,400)
                        show()
                }

                oTcpServer = new qTcpServer(win1) {
                        setNewConnectionEvent("oServer.pNewConnection()")
                        oHostAddress = new qHostAddress()
                        oHostAddress.SetAddress("127.0.0.1")
                        listen(oHostAddress,9999)
                }
                cOutput = "Server Started" + nl +
                           "listen to port 9999" + nl

                lineedit1.settext(cOutput)

        Func pNewConnection

                oTcpClient = oTcpServer.nextPendingConnection()
                cOutput += "Accept Connection" + nl
                lineedit1.settext(cOutput)
                oTcpClient {
                        cStr ="Hello from server to client!"+char(13)+char(10)
                        write(cStr,len(cStr))
                        flush()
                        waitforbyteswritten(300000)
                        close()
                }

The application during the runtime

Client and Server Example

Dynamic Objects

We may create objects in the runtime and add them to windows.

Example:

load "guilib.ring"

oFormDesigner = new FormDesigner { start("oFormDesigner") }

Class FormDesigner

        winToolBox  winForm

        aObjects = []

        func start cObjectName

                oApp = new qApp

                winToolBox = new qWidget()
                winToolBox.setWindowTitle("ToolBox")
                winToolBox.move(10,10)
                winToolBox.resize(300,600)

                btn = new qPushButton(winToolBox)
                btn.resize(300,30)
                btn.setText("Create Button")
                btn.setClickEvent(cObjectName+".pCreateButton()")
                btn.show()

                winToolBox.show()

                winForm = new qWidget() {
                        move(400,50)
                        setWindowTitle("Form Designer")
                        resize(600,600)
                        show()
                }

                oApp.exec()


        func pCreateButton

                nCount = len(aObjects)

                aObjects + new MyButton(winForm)
                {
                        nIndex = nCount + 1
                        setText("Button"+ nIndex)
                        Move(30*nIndex,30*nIndex)
                        resize(100,30)
                        show()
                }


Class MyButton from qPushButton
        nIndex = 0

Weight History Application

The next sample help in recording (Date, Time and Weight).

Load "guilib.ring"

MyApp = new qApp
{
  $ApplicationObject = "oApp"   # To be used when calling events
  oApp = new App
  exec()
  oApp.CloseDatabase()
}

class App

  cDir = currentdir() + "/"
  oCon
  aIDs = []

  win1 = new qWidget()
  {
        setWindowTitle("Weight History")
        resize(600,600)
        layoutButtons = new qhboxlayout()
        {
          label1 = new qLabel(win1) { setText("Weight") }
          text1 = new qlineedit(win1)
          btnAdd = new qpushbutton(win1) {
                  setText("Add")
                  setClickEvent($ApplicationObject+".AddWeight()")
          }
          btnDelete = new qpushbutton(win1) {
                  setText("Delete")
                  setClickEvent($ApplicationObject+".Deleteweight()")
          }
          addwidget(label1)
          addwidget(text1)
          addwidget(btnAdd)
          addwidget(btnDelete)
        }
        layoutData  = new qhboxlayout()
        {
          Table1 = new qTableWidget(win1) {
                setrowcount(0)
                setcolumncount(3)
                setselectionbehavior(QAbstractItemView_SelectRows)
                setHorizontalHeaderItem(0, new QTableWidgetItem("Date"))
                setHorizontalHeaderItem(1, new QTableWidgetItem("Time"))
                setHorizontalHeaderItem(2, new QTableWidgetItem("Weight"))
                setitemChangedEvent($ApplicationObject+".ItemChanged()")
                                   setAlternatingRowColors(true)
                                   horizontalHeader().setStyleSheet("color: blue")
                                   verticalHeader().setStyleSheet("color: red")
          }
          addWidget(Table1)
        }
        layoutClose = new qhboxlayout()
        {
          btnclose = new qpushbutton(win1) {
            setText("Close")
            setClickEvent("MyApp.Quit()")
          }
          addwidget(btnClose)
        }
        layoutMain = new qvboxlayout()
        {
          addlayout(layoutButtons)
          addLayout(LayoutData)
          addLayout(layoutClose)
        }
        setlayout(layoutMain)
        self.OpenDatabase()
        self.ShowRecords()
        show()
  }

  Func OpenDatabase
        lCreate = False
        if not fexists(cDir + "weighthistory.db")
          lCreate = True
        ok
        new QSqlDatabase() {
          this.oCon = addDatabase("QSQLITE") {
                setDatabaseName("weighthistory.db")
                Open()
          }
        }
        if lCreate
          new QSqlQuery( ) {
                exec("create table weighthistory (id integer primary key,"+
                     " f_date varchar(10),"+
                     " f_time varchar(8), f_weight varchar(8) );")
                delete()
          }
        ok


  Func CloseDatabase
        oCon.Close()

  Func AddWeight
        cWeight = text1.text()
        AddRecord(cWeight)

  Func DeleteWeight
        Table1 {
           nRow = CurrentRow()
          if nRow >= 0
                nID = this.aIDs[nROW+1]
                new QSqlQuery( ) {
                  exec("delete from weighthistory where id = " + nID )
                }
                Del(this.aIDs,nRow+1)
                removerow(nRow)
                selectrow(nRow)
          ok
        }


  Func AddRecord cWeight
        new QSqlQuery( ) {
          cStr = "insert into weighthistory (f_date,f_time,f_weight) values"+
          " ('%f1','%f2','%f3')"
          cDate = Date()
          cTime = Time()
          cStr = substr(cStr,"%f1",cDate)
          cStr = substr(cStr,"%f2",cTime)
          cStr = substr(cStr,"%f3",cWeight)
          exec(cStr)
          delete()
        }
        ShowRecords()
        Table1.selectrow(table1.rowcount()-1)


  Func ShowRecords
        table1.setitemChangedEvent("")
        aIDs = []
        query = new QSqlQuery() {
          exec("select * from weighthistory")
          nRows = 0
          this.Table1.setrowcount(0)
          while movenext()
                this.table1 {
                  insertRow(nRows)
                  this.aIDs + query.value(0).tostring()
                  for x = 1 to 3
                        cStr = query.value(x).tostring()
                        item = new qTableWidgetItem(cStr)
                        setItem(nRows,x-1,item)
                  next
                }
                nRows++
          end
          delete()
        }
        table1.setitemChangedEvent($ApplicationObject+".ItemChanged()")

  Func ItemChanged
        nRow =  table1.currentrow()
        if nRow >= 0
          myitem = Table1.item(table1.currentrow(),0)
          cDate = myitem.text()
          myitem = Table1.item(table1.currentrow(),1)
          cTime = myitem.text()
          myitem = Table1.item(table1.currentrow(),2)
          cWeight = myitem.text()
          new QSqlQuery( ) {
                cStr = "update weighthistory set f_date ='%f1' , f_time = '%f2' , "+
                "f_weight ='%f3' where id = " +  this.aIDs[nROW+1]
                cStr = substr(cStr,"%f1",cDate)
                cStr = substr(cStr,"%f2",cTime)
                cStr = substr(cStr,"%f3",cWeight)
                exec(cStr)
                delete()
          }
        ok

The next screen shot for the application during the runtime

Weight History Application

Notepad Application

In the next example we will see simple Notepad developed using the RingQt

Load "guilib.ring"

cActiveFileName = ""
aTextColor = [0,0,0]
aBackColor = [255,255,255]
cFont = "MS Shell Dlg 2,14,-1,5,50,0,0,0,0,0"
cWebsite = "http://www.google.com"

oSearch = NULL
oSearchValue = NULL
oSearchCase = NULL
oSearchFilter = NULL
oReplaceValue = NULL

lAskToSave = false

MyApp = New qApp {
        win1 = new qMainWindow() {

                setwindowtitle("Ring Notepad")
                setGeometry(100,100,400,400)
                aBtns = [
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/new.png")
                                        setclickevent("pNew()")
                                        settooltip("New File")
                                } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/open.png")
                                        setclickevent("pOpen()")
                                        settooltip("Open File")
                                } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/save.png")
                                        setclickevent("pSave()")
                                        settooltip("Save")
                                 } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/saveas.png")
                                        setclickevent("pSaveAs()")
                                        settooltip("Save As")
                                 } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/cut.png")
                                        setclickevent("pCut()")
                                        settooltip("Cut")
                                 } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/copy.png")
                                        setclickevent("pCopy()")
                                        settooltip("Copy")
                                } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/paste.png")
                                        setclickevent("pPaste()")
                                        settooltip("Paste")
                                } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/font.png")
                                        setclickevent("pFont()")
                                        settooltip("Font")
                                } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/colors.jpg")
                                        setclickevent("pColor()")
                                        settooltip("Text Color")
                                } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/search.png")
                                        setclickevent("pFind()")
                                        settooltip("Find and Replace")
                                } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/print.png")
                                        setclickevent("pPrint()")
                                        settooltip("Print")
                                } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/debug.png")
                                        setclickevent("pDebug()")
                                        settooltip("Debug (Run then wait!)")
                                } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/run.png")
                                        setclickevent("pRun()")
                                        settooltip("Run the program")
                                } ,
                                new qpushbutton(win1) {
                                        setbtnimage(self,"image/close.png")
                                        setclickevent("pQuit()")
                                        settooltip("Quit")
                                }
                        ]

                tool1 = addtoolbar("files")  {
                        for x in aBtns addwidget(x) addseparator() next
                }

                menu1 = new qmenubar(win1) {
                        sub1 = addmenu("File")
                        sub2 = addmenu("Edit")
                        sub3 = addmenu("View")
                        sub4 = addmenu("Help")
                        sub1 {
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+n"))
                                        setbtnimage(self,"image/new.png")
                                        settext("New")
                                        setclickevent("pNew()")
                                }
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+o"))
                                        setbtnimage(self,"image/open.png")
                                        settext("Open")
                                        setclickevent("pOpen()")
                                }
                                addaction(oAction)
                                addseparator()
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+s"))
                                        setbtnimage(self,"image/save.png")
                                        settext("Save")
                                        setclickevent("pSave()")
                                }
                                addaction(oAction)
                                addseparator()
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+e"))
                                        setbtnimage(self,"image/saveas.png")
                                        settext("Save As")
                                        setclickevent("pSaveAs()")
                                }
                                addaction(oAction)
                                addseparator()
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+p"))
                                        setbtnimage(self,"image/print.png")
                                        settext("Print to PDF")
                                        setclickevent("pPrint()")
                                }
                                addaction(oAction)
                                addseparator()
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+d"))
                                        setbtnimage(self,"image/debug.png")
                                        settext("Debug (Run then wait!)")
                                        setclickevent("pDebug()")
                                }
                                addaction(oAction)
                                addseparator()
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+r"))
                                        setbtnimage(self,"image/run.png")
                                        settext("Run")
                                        setclickevent("pRun()")
                                }
                                addaction(oAction)
                                addseparator()
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+F5"))
                                        setbtnimage(self,"image/run.png")
                                        settext("Run GUI Application (No Console)")
                                        setclickevent("pRunNoConsole()")
                                }
                                addaction(oAction)
                                addseparator()
                                oAction = new qaction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+q"))
                                        setbtnimage(self,"image/close.png")
                                        settext("Exit")
                                        setstatustip("Exit")
                                        setclickevent("pQuit()")
                                }
                                addaction(oAction)
                        }
                        sub2 {
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+x"))
                                        setbtnimage(self,"image/cut.png")
                                        settext("Cut")
                                        setclickevent("pCut()")
                                }
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+c"))
                                        setbtnimage(self,"image/copy.png")
                                        settext("Copy")
                                        setclickevent("pCopy()")
                                }
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+v"))
                                        setbtnimage(self,"image/paste.png")
                                        settext("Paste")
                                        setclickevent("pPaste()")
                                }
                                addaction(oAction)
                                addseparator()
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+i"))
                                        setbtnimage(self,"image/font.png")
                                        settext("Font")
                                        setclickevent("pFont()")
                                }
                                addseparator()
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+t"))
                                        setbtnimage(self,"image/colors.jpg")
                                        settext("Text Color")
                                        setclickevent("pColor()")
                                }
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+b"))
                                        setbtnimage(self,"image/colors.jpg")
                                        settext("Back Color")
                                        setclickevent("pColor2()")
                                }
                                addaction(oAction)
                                addseparator()
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+g"))
                                        settext("Go to line")
                                        setclickevent("pGoto()")
                                }
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+f"))
                                        setbtnimage(self,"image/search.png")
                                        settext("Find and Replace")
                                        setclickevent("pFind()")
                                }
                                addaction(oAction)
                        }
                        sub3 {
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+p"))
                                        setbtnimage(self,"image/project.png")
                                        settext("Project Files")
                                        setclickevent("pProject()")
                                }
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+u"))
                                        setbtnimage(self,"image/source.png")
                                        setclickevent("pSourceCode()")
                                        settext("Source Code")
                                }
                                addaction(oAction)
                                oAction = new qAction(win1) {
                                        setShortcut(new QKeySequence("Ctrl+w"))
                                        setbtnimage(self,"image/richtext.png")
                                        setclickevent("pWebBrowser()")
                                        settext("Web Browser")
                                }
                                addaction(oAction)
                        }
                        sub4 {
                                sub5 = addmenu("Development Tools")
                                sub5 {

                                        oAction = new qAction(win1) {
                                                settext("Programming Language")
                                                setclickevent("pLang()")
                                        }
                                        addaction(oAction)
                                        oAction = new qAction(win1) {
                                                settext("GUI Library")
                                                setclickevent("pGUI()")
                                        }
                                        addaction(oAction)
                                }
                                addseparator()
                                        oAction = new qAction(win1) {
                                                settext("About")
                                                setclickevent("pAbout()")
                                        }
                                        addaction(oAction)
                        }
                }

                setmenubar(menu1)

                status1 = new qstatusbar(win1) {
                        showmessage("Ready!",0)
                }

                setstatusbar(status1)

                tree1 = new qtreeview(win1) {
                        setclickedevent("pChangeFile()")
                        setGeometry(00,00,200,400)
                        oDir = new QDir()
                        ofile = new QFileSystemModel() {
                                setrootpath(oDir.currentpath())
                                myfiles = new qstringlist()
                                myfiles.append("*.ring")
                                myfiles.append("*.rh")
                                setnamefilters(myfiles)
                                setNameFilterDisables(false)
                        }
                        setmodel(ofile)
                        myindex = ofile.index(oDir.currentpath(),0)
                        for x = 1 to ofile.columncount()
                                hidecolumn(x)
                        next
                        setcurrentindex(myindex)
                        setexpanded(myindex,true)
                        header().hide()
                }

                oDock1 = new qdockwidget(win1,0) {
                        setGeometry(00,00,200,200)
                        setwindowtitle("Project Files")
                        setwidget(tree1)
                }

                textedit1 = new qtextedit(win1) {
                        setCursorPositionChangedevent("pCursorPositionChanged()")
                        setLineWrapMode(QTextEdit_NoWrap)
                        setAcceptRichText(false)
                        setTextChangedEvent("lAskToSave = true")
                }


                oDock2 = new qdockwidget(win1,0) {
                        setwidget(textedit1)
                        setwindowtitle("Source Code")
                }

                oWebBrowser = new qWidget() {
                        setWindowFlags(Qt_SubWindow)
                        oWBLabel = new qLabel(win1) {
                                setText("Website: ")
                        }
                        oWBText = new qLineEdit(win1) {
                                setText(cWebSite)
                                setReturnPressedEvent("pWebGo()")
                        }
                        oWBGo = new qPushButton(win1) {
                                setText("Go")
                                setClickEvent("pWebGo()")
                        }
                        oWBBack = new qPushButton(win1) {
                                setText("Back")
                                setClickEvent("pWebBack()")
                        }
                        oWBLayout1 = new qHBoxLayout() {
                                addWidget(oWBLabel)
                                addWidget(oWBText)
                                addWidget(oWBGo)
                                addWidget(oWBBack)
                        }
                        oWebView = new qWebView(win1) {
                                loadpage(new qurl(cWebSite))
                        }
                        oWBlayout2 = new qVBoxLayout() {
                                addLayout(oWBLayout1)
                                addWidget(oWebView)
                        }
                        setLayout(oWBLayout2)
                }

                oDock3 = new qdockwidget(win1,0) {
                        setwidget(oWebBrowser)
                        setwindowtitle("Web Browser")
                        setFeatures(QDockWidget_DocWidgetClosable)
                }

                adddockwidget(1,oDock1,1)
                adddockwidget(2,oDock2,2)
                adddockwidget(2,oDock3,1)

                setwinicon(self,"image/notepad.png")

                showmaximized()
        }
        RestoreSettings()
        exec()
}

func pWebGo
        cWebsite = oWBText.text()
        oWebView.LoadPage( new qurl( cWebSite ) )

func pWebBack
        oWebView.Back()

func pProject
        oDock1.Show()

func pSourceCode
        oDock2.Show()

func pWebBrowser
        oDock3.Show()

func pChangeFile
        myitem = tree1.currentindex()
        if ofile.isdir(myitem)
                return
        ok
        cActiveFileName = ofile.filepath(myitem)
        textedit1.settext(read(cActiveFileName))
        textedit1.setfocus(0)
        pCursorPositionChanged()
        pSetActiveFileName()

func pSetActiveFileName
        oDock2.setWindowTitle("Source Code : " + cActiveFileName)

func pCursorPositionChanged
        status1.showmessage(" Line : "+(textedit1.textcursor().blocknumber()+1)+
                        " Column : " +(textedit1.textcursor().columnnumber()+1) +
                        " Total Lines : " + textedit1.document().linecount() ,0)

func pGoto
        oInput = New QInputDialog(win1)
        {
                setwindowtitle("Enter the line number?")
                setgeometry(100,100,400,50)
                setlabeltext("Line")
                settextvalue("1")
                exec()
                nLine = 0 + oInput.textvalue()
                oBlock = textedit1.document().findBlockByLineNumber(nLine-1)
                oCursor = textedit1.textcursor()
                oCursor.setposition(oBlock.position(),0)
                textedit1.settextcursor(oCursor)
        }

func pFind
        if isobject(oSearch)
                oSearch.activatewindow()
                return
        ok
        oSearch = new qWidget()
        {
                new qLabel(oSearch)
                {
                        setText("Find What : ")
                        setgeometry(10,10,50,30)
                }
                oSearchValue = new qlineedit(oSearch)
                {
                        setgeometry(80,10,460,30)
                        setReturnPressedEvent("pFindValue()")
                }
                new qLabel(oSearch)
                {
                        setText("Replace with ")
                        setgeometry(10,45,80,30)
                }
                oReplaceValue = new qlineedit(oSearch)
                {
                        setgeometry(80,45,460,30)
                }
                oSearchCase = new qCheckbox(oSearch)
                {
                        setText("Case Sensitive")
                        setgeometry(80,85,100,30)
                }
                new qPushButton(oSearch)
                {
                        setText("Find/Find Next")
                        setgeometry(80,120,100,30)
                        setclickevent("pFindValue()")
                }
                new qPushButton(oSearch)
                {
                        setText("Replace")
                        setgeometry(200,120,100,30)
                        setclickevent("pReplace()")
                }
                new qPushButton(oSearch)
                {
                        setText("Replace All")
                        setgeometry(320,120,100,30)
                        setclickevent("pReplaceAll()")
                }
                new qPushButton(oSearch)
                {
                        setText("Close")
                        setgeometry(440,120,100,30)
                        setclickevent("pSearchClose()")
                }

                setwinicon(oSearch,"image/notepad.png")
                setWindowTitle("Find/Replace")
                setStyleSheet("background-color:white;")
                setFixedsize(550,160)
                setwindowflags( Qt_CustomizeWindowHint |
                                Qt_WindowTitleHint | Qt_WindowStaysOnTopHint)

                oSearchFilter = new qallevents(oSearch)
                oSearchFilter.setKeyPressEvent("pSearchKeyPress()")
                installeventfilter(oSearchFilter)

                show()
        }

Func pReplace
        oCursor = textedit1.textCursor()
        if oCursor.HasSelection() = false
                new qMessagebox(oSearch)
                {
                        SetWindowTitle("Replace")
                        SetText("No Selection")
                        show()
                }
                return false
        ok
        cValue = oSearchValue.text()
        cSelected = oCursor.SelectedText()
        if oSearchCase.checkState() = Qt_Unchecked
                cValue = lower(cValue)
                cSelected = lower(cSelected)
        ok
        if cSelected != cValue
                new qMessagebox(oSearch)
                {
                        SetWindowTitle("Replace")
                        SetText("No Match")
                        show()
                }
                return false
        ok
        cValue = oReplaceValue.text()
        nStart = oCursor.SelectionStart()
        nEnd = oCursor.SelectionEnd()
        cStr = textedit1.toPlainText()
        cStr = left(cStr,nStart)+cValue+substr(cStr,nEnd+1)
        textedit1.setText(cStr)
        return pFindValue()

Func pReplaceAll
        cStr = textedit1.toPlainText()
        cOldValue = oSearchValue.text()
        cNewValue = oReplaceValue.text()
        if oSearchCase.checkState() = Qt_Unchecked
                # Not Case Sensitive
                cStr = SubStr(cStr,cOldValue,cNewValue,true)
        else
                # Case Sensitive
                cStr = SubStr(cStr,cOldValue,cNewValue)
        ok
        textedit1.setText(cStr)
        new qMessagebox(oSearch)
        {
                SetWindowTitle("Replace All")
                SetText("Operation Done")
                show()
        }

Func pSearchClose
        oSearch.close()
        oSearch = NULL

func pSearchKeyPress
        if oSearchFilter.getKeyCode() = Qt_Key_Escape
                pSearchClose()
        ok

func pFindValue
        oCursor = textedit1.textcursor()
        nPosStart = oCursor.Position() + 1
        cValue = oSearchValue.text()
        cStr = textedit1.toplaintext()
        cStr = substr(cStr,nPosStart)
        if oSearchCase.checkState() = Qt_Unchecked
                cStr = lower(cStr)  cValue = lower(cValue)
        ok
        nPos = substr(cStr,cValue)
        if nPos > 0
                nPos += nPosStart - 2
                oCursor = textedit1.textcursor()
                oCursor.setposition(nPos,0)
                textedit1.settextcursor(oCursor)
                oCursor = textedit1.textcursor()
                oCursor.setposition(nPos+len(cValue),1)
                textedit1.settextcursor(oCursor)
                return true
        else
                new qMessagebox(oSearch)
                {
                        SetWindowTitle("Search")
                        SetText("Cannot find :" + cValue)
                        show()
                }
                return false
        ok

func pNofileopened
        New qMessageBox(win1) {
                setWindowTitle("Sorry")
                setText("Save the file first!")
                show()
        }

func pDebug
        if cActiveFileName = Null return pNofileopened() ok
        cCode = "start run " + cActiveFileName + nl
        system(cCode)

func pRun
        if cActiveFileName = Null return pNofileopened() ok
        cCode = "start ring " + cActiveFileName + nl
        system(cCode)

func pRunNoConsole
        if cActiveFileName = Null return pNofileopened() ok
        cCode = "start /b ring " + cActiveFileName + nl
        system(cCode)

func pSave
        if cActiveFileName = NULL return pSaveAs() ok
        writefile(cActiveFileName,textedit1.toplaintext())
        status1.showmessage("File : " + cActiveFileName + " saved!",0)
        lAskToSave = false

func pSaveAs
        new qfiledialog(win1) {
                cName = getsavefilename(win1,"Save As","","source files(*.ring)")
                if cName != NULL
                        cActiveFileName = cName
                        writefile(cActiveFileName,textedit1.toplaintext())
                        status1.showmessage("File : " + cActiveFileName + " saved!",0)
                        pSetActiveFileName()
                        lAskToSave = false
                ok
        }

func pPrint
        status1.showmessage("Printing to File : RingDoc.pdf",0)
        printer1 = new qPrinter(0) {
                setoutputformat(1)      # 1 = pdf
                setoutputfilename("RingDoc.pdf")
                textedit1.print(printer1)
        }
        status1.showmessage("Done!",0)
        system("RingDoc.pdf")

func pCut
        textedit1.cut()
        status1.showmessage("Cut!",0)

func pCopy
        textedit1.copy()
        status1.showmessage("Copy!",0)

func pPaste
        textedit1.paste()
        status1.showmessage("Paste!",0)

func pFont
        oFontDialog = new qfontdialog() {
                aFont = getfont()
        }
        textedit1.selectall()
        cFont = aFont[1]
        pSetFont()

Func pSetFont
        myfont = new qfont("",0,0,0)
        myfont.fromstring(cFont)
        textedit1.setcurrentfont(myfont)

Func pColor
        new qcolordialog() { aTextColor = GetColor() }
        pSetColors()

Func pColor2
        new qcolordialog() { aBackColor = GetColor() }
        pSetColors()

Func pSetColors
        textedit1.setstylesheet("color: rgb(" + aTextColor[1] + "," + aTextColor[2] +
                                "," + aTextColor[3] + ");" + "background-color: rgb(" +
                                aBackColor[1] + "," + aBackColor[2] + "," +
                                aBackColor[3] + ")")

func pOpen
        new qfiledialog(win1) {
                cName = getopenfilename(win1,"open file","c:\","source files(*.ring)")
                if cName != NULL
                        cActiveFileName = cName
                        textedit1.settext(read(cActiveFileName))
                ok
        }

func pNew
        new qfiledialog(win1) {
                cName = getsavefilename(win1,"New file","","source files(*.ring)")
                if cName != NULL
                        write(cName,"")
                        cActiveFileName = cName
                        textedit1.settext(read(cActiveFileName))

                ok
        }

Func WriteFile cFileName,cCode
        aCode = str2list(cCode)
        fp = fopen(cFileName,"wb")
        for cLine in aCode
                fwrite(fp,cLine+char(13)+char(10))
        next
        fclose(fp)

Func MsgBox cTitle,cMessage
        new qMessagebox(win1) {
                setwindowtitle(cTitle)
                setText(cMessage)
                show()
        }


Func pLang
        MsgBox("Programming Language",
                "This application developed using the Ring programming language")

Func pGUI
        MsgBox("GUI Library",
                "This application uses the Qt GUI Library through RingQt")

Func pAbout
        MsgBox("About",
                "2016, Mahmoud Fayed <msfclipper@yahoo.com>")

Func pSaveSettings
        cSettings = "aTextColor = ["+aTextColor[1]+","+aTextColor[2]+
                        ","+aTextColor[3]+"]" + nl +
                        "aBackColor = ["+aBackColor[1]+","+aBackColor[2]+
                        ","+aBackColor[3]+"]" + nl +
                        "cFont = '" + cFont + "'" + nl +
                        "cWebSite = '" + cWebsite + "'" + nl
        cSettings = substr(cSettings,nl,char(13)+char(10))
        write("ringnotepad.ini",cSettings)
        if lAsktoSave
                new qmessagebox(win1)
                {
                        setwindowtitle("Save Changes?")
                        settext("Some changes are not saved!")
                        setInformativeText("Do you want to save your changes?")
                        setstandardbuttons(QMessageBox_Yes |
                                           QMessageBox_No | QMessageBox_Cancel)
                        result = exec()
                        win1 {
                        if result = QMessageBox_Yes
                                pSave()
                        but result = QMessageBox_Cancel
                                return false
                        ok
                }
        }
        ok
        return true

Func pSetWebsite
        oWebView { loadpage(new qurl(cWebSite)) }
        oWBText  { setText(cWebSite) }

Func RestoreSettings
        eval(read("ringnotepad.ini"))
        pSetColors()
        pSetFont()
        pSetWebsite()

Func pQuit
        if pSaveSettings()
                myapp.quit()
        ok

The application during the runtime

The next screen shot demonstrates the “File” menu

Ring Notepad - File Menu

The next window for “search and replace”

Ring Notepad - Search and replace

The next screen shot demonstrates the application main window

Ring Notepad - The Main Window

Note

the functions pDebug(), pRun() and pRunNoConsole() in the previous sample are not portable! They are written in this sample for MS-Windows and we can update them for other operating systems.

The Cards Game

In the next example we will see a simple Cards game developed using RingQt

Each player get 5 cards, the cards are unknown to any one. each time one player click on one card to see it. if the card is identical to another card the play get point for each card. if the card value is “5” the player get points for all visible cards.

Load "guilib.ring"

nScale = 1

app1 = new qApp

mypic = new QPixmap("cards.jpg")

mypic2 = mypic.copy(0,(124*4)+1,79,124)
Player1EatPic = mypic.copy(80,(124*4)+1,79,124)
Player2EatPic= mypic.copy(160,(124*4)+1,79,124)

aMyCards = []
aMyValues = []
for x1 = 0 to 3
        for y1 = 0 to 12
          temppic = mypic.copy((79*y1)+1,(124*x1)+1,79,124)
                  aMyCards + temppic
                  aMyValues + (y1+1)
        next
next

nPlayer1Score = 0   nPlayer2Score=0

do
        Page1 = new Game
        Page1.Start()
again Page1.lnewgame

mypic.delete()
mypic2.delete()
Player1EatPic.delete()
Player2EatPic.delete()

for t in aMyCards
          t.delete()
next

func gui_setbtnpixmap pBtn,pPixmap
        pBtn {
                setIcon(new qicon(pPixmap.scaled(width(),height(),0,0)))
                setIconSize(new QSize(width(),height()))
        }

Class Game

        nCardsCount = 10
        win1 layout1 label1 label2 layout2 layout3 aBtns aBtns2
        aCards nRole=1 aStatus = list(nCardsCount) aStatus2 = aStatus
        aValues        aStatusValues = aStatus  aStatusValues2 = aStatus
        Player1EatPic   Player2EatPic
        lnewgame = false
        nDelayEat = 0.5
        nDelayNewGame = 1

        func start

                win1 = new qWidget() {
                        setwindowtitle("Five")
                        setstylesheet("background-color: White")
                        showfullscreen()
                }

                layout1 = new qvboxlayout()

                label1 = new qlabel(win1) {
                        settext("Player (1) - Score : " + nPlayer1Score)
                        setalignment(Qt_AlignHCenter | Qt_AlignVCenter)
                        setstylesheet("color: White; background-color: Purple;
                                         font-size:20pt")
                        setfixedheight(200)
                }

                closebtn = new qpushbutton(win1)  {
                        settext("Close Application")
                        setstylesheet("font-size: 18px ; color : white ;
                                         background-color: black ;")
                        setclickevent("Page1.win1.close()")
                }

                aCards = aMyCards
                aValues = aMyValues

                layout2 = new qhboxlayout()

                aBtns = []

                for x = 1 to nCardsCount
                        aBtns + new qpushbutton(win1)
                        aBtns[x].setfixedwidth(79*nScale)
                        aBtns[x].setfixedheight(124*nScale)
                        gui_setbtnpixmap(aBtns[x],mypic2)
                        layout2.addwidget(aBtns[x])
                        aBtns[x].setclickevent("Page1.Player1click("+x+")")
                next

                layout1.addwidget(label1)
                layout1.addlayout(layout2)

                label2 = new qlabel(win1) {
                        settext("Player (2) - Score : " + nPlayer2Score)
                        setalignment(Qt_AlignHCenter | Qt_AlignVCenter)
                        setstylesheet("color: white; background-color: red;
                                         font-size:20pt")
                        setfixedheight(200)
                }

                layout3 = new qhboxlayout()

                aBtns2 = []
                for x = 1 to nCardsCount
                        aBtns2 + new qpushbutton(win1)
                        aBtns2[x].setfixedwidth(79*nScale)
                        aBtns2[x].setfixedheight(124*nScale)
                        gui_setbtnpixmap(aBtns2[x],mypic2)
                        layout3.addwidget(aBtns2[x])
                        aBtns2[x].setclickevent("Page1.Player2click("+x+")")
                next

                layout1.addwidget(label2)
                layout1.addlayout(layout3)
                layout1.addwidget(closebtn)

                win1.setlayout(layout1)

                app1.exec()

        Func Player1Click x
                if nRole = 1 and aStatus[x] = 0
                        nPos = ((random(100)+clock())%(len(aCards)-1)) + 1
                        gui_setbtnpixmap(aBtns[x],aCards[nPos])
                        del(aCards,nPos)
                        nRole = 2
                        aStatus[x] = 1
                        aStatusValues[x] = aValues[nPos]
                        del(aValues,nPos)
                        Player1Eat(x,aStatusValues[x])
                        checknewgame()
                ok

        Func Player2Click x
                if nRole = 2 and aStatus2[x] = 0
                        nPos = ((random(100)+clock())%(len(aCards)-1)) + 1
                        gui_setbtnpixmap(aBtns2[x],aCards[nPos])
                        del(aCards,nPos)
                        nRole = 1
                        aStatus2[x] = 1
                        aStatusValues2[x] = aValues[nPos]
                        del(aValues,nPos)
                        Player2Eat(x,aStatusValues2[x])
                        checknewgame()
                ok

        Func Player1Eat nPos,nValue

                 app1.processEvents()

                 delay(nDelayEat)
                 lEat = false
                 for x = 1 to nCardsCount
                         if aStatus2[x] = 1 and (aStatusValues2[x] = nValue or nValue=5)
                                aStatus2[x] = 2
                                gui_setbtnpixmap(aBtns2[x],Player1EatPic)
                                lEat = True
                                nPlayer1Score++
                         ok
                         if (x != nPos) and (aStatus[x] = 1) and
                                (aStatusValues[x] = nValue or nValue=5)
                                aStatus[x] = 2
                                gui_setbtnpixmap(aBtns[x],Player1EatPic)
                                lEat = True
                                nPlayer1Score++
                         ok
                 next
                 if lEat
                                nPlayer1Score++
                                gui_setbtnpixmap(aBtns[nPos],Player1EatPic)
                                aStatus[nPos] = 2
                                label1.settext("Player (1) - Score : " + nPlayer1Score)
                 ok

        Func Player2Eat nPos,nValue

                 app1.processEvents()

                 delay(nDelayEat)
                 lEat = false
                 for x = 1 to  nCardsCount
                         if aStatus[x] = 1 and (aStatusValues[x] = nValue or nValue = 5)
                                aStatus[x] = 2
                                gui_setbtnpixmap(aBtns[x],Player2EatPic)
                                lEat = True
                                nPlayer2Score++
                         ok

                         if (x != nPos) and (aStatus2[x] = 1) and
                                (aStatusValues2[x] = nValue or nValue=5 )
                                aStatus2[x] = 2
                                gui_setbtnpixmap(aBtns2[x],Player2EatPic)
                                lEat = True
                                nPlayer2Score++
                         ok
                 next
                 if lEat
                                nPlayer2Score++
                                gui_setbtnpixmap(aBtns2[nPos],Player2EatPic)
                                aStatus2[nPos] = 2
                                label2.settext("Player (2) - Score : " + nPlayer2Score)
                 ok

        Func checknewgame
                if isnewgame()
                                  lnewgame = true

                                  if nPlayer1Score > nPlayer2Score
                                         label1.settext("Player (1) Wins!!!")
                                  ok
                                  if nPlayer2Score > nPlayer1Score
                                         label2.settext("Player (2) Wins!!!")
                                  ok

                                  app1.processEvents()
                                  delay(nDelayNewGame)

                                  win1.delete()
                                  app1.quit()
                ok

        Func isnewgame
                for t in aStatus
                        if t = 0
                                return false
                        ok
                next
                for t in aStatus2
                        if t = 0
                                return false
                        ok
                next
                return true

        Func delay x
        nTime = x * 1000
        oTest = new qTest
        oTest.qsleep(nTime)

The application during the runtime

The Cards Game

Note

in the previous screen shot the player get the card number ‘5’ but his score is not increased because he opened this card while no other cards are visible!

The next screen shot while running the game using a Mobile (Android)

The Cards Game

Note

using Qt we can run the same application on other Mobile systems

Classes and their Methods to use the default events

The next table present the class name and the methods that we have to use the default events.

Class Name Methods to use the default Events
QPushButton SetClickEvent()
QAction SetClickEvent()
QLineEdit SetTextChangedEvent()
SetCursorPositionChangedEvent()
SetEditingFinishedEvent()
SetReturnPressedEvent()
SetSelectionChangedEvent()
SetTextEditedEvent()
QTextEdit SetCopyAvailableEvent()
SetCurrentCharFormatChangedEvent()
SetCursorPositionChangedEvent()
SetRedoAvailableEvent()
SetSelectionChangedEvent()
SetTextChangedEvent()
SetUndoAvailableEvent()
QListWidget SetCurrentItemChangedEvent()
SetCurrentRowChangedEvent()
SetCurrentTextChangedEvent()
SetItemActivatedEvent()
SetItemChangedEvent()
SetItemClickedEvent()
SetItemDoubleClickedEvent()
SetItemEnteredEvent()
SetItemPressedEvent()
SetItemSelectionChangedEvent()
QTreeView SetCollapseEvent()
SetExpandedEvent()
SetActivatedEvent()
SetClickedEvent()
SetDoubleClickedEvent()
SetEnteredEvent()
SetPressedEvent()
SetViewportEnteredEvent()
QTreeWidget SetCollapsedEvent()
SetExpandedEvent()
SetActivatedEvent()
SetClickedEvent()
SetDoubleClickedEvent()
SetEnteredEvent()
SetPressedEvent()
SetViewportEnteredEvent()
SetCurrentItemChangedEvent()
SetItemActivatedEvent()
SetItemChangedEvent()
SetItemClickedEvent()
SetItemCollapsedEvent()
SetItemDoubleClickedEvent()
SetItemEnteredEvent()
SetItemExpandedEvent()
SetItemPressedEvent()
SetItemSelectionChangedEvent()
QComboBox SetActivatedEvent()
SetCurrentIndexChangedEvent()
SetEditTextChangedEvent()
SetHighlightedEvent()
QTabWidget SetCurrentChangedEvent()
SetTabCloseRequestedEvent()
QTableWidget SetCellActivatedEvent()
SetCellChangedEvent()
SetCellClickedEvent()
SetCellDoubleClickedEvent()
SetCellEnteredEvent()
SetCellPressedEvent()
SetCurrentCellChangedEvent()
SetCurrentItemChangedEvent()
SetItemActivatedEvent()
SetItemChangedEvent()
SetItemClickedEvent()
SetItemDoubleClickedEvent()
SetItemEnteredEvent()
SetItemPressedEvent()
SetItemSelectionChangedEvent()
QProgressBar SetValueChangedEvent()
QSpinBox SetValueChangedEvent()
QSlider SetActionTriggeredEvent()
SetRangeChangedEvent()
SetSliderMovedEvent()
SetSliderPressedEvent()
SetSliderReleasedEvent()
SetValueChangedEvent()
QDial SetActionTriggeredEvent()
SetRangeChangedEvent()
SetSliderMovedEvent()
SetSliderPressedEvent()
SetSliderReleasedEvent()
SetValueChangedEvent()
QWebView SetLoadFinishedEvent()
SetLoadProgressEvent()
SetLoadStartedEvent()
SetSelectionChangedEvent()
SetTitleChangedEvent()
SetUrlChangedEvent()
QCheckBox SetStateChangedEvent()
SetClickedEvent()
SetPressedEvent()
SetReleasedEvent()
SetToggledEvent()
QRadioButton SetClickedEvent()
SetPressedEvent()
SetReleasedEvent()
SetToggledEvent()
QButtonGroup SetButtonClickedEvent()
SetButtonPressedEvent()
SetButtonReleasedEvent()
QVideoWidget SetBrightnessChangedEvent()
SetContrastChangedEvent()
SetFullScreenChangedEvent()
SetHueChangedEvent()
SetSaturationChangedEvent()
QTimer SetTimeoutEvent()
QTcpServer SetAcceptErrorEvent()
SetNewConnectionEvent()
QIODevice SetAboutToCloseEvent()
SetBytesWrittenEvent()
SetReadChannelFinishedEvent()
SetReadyReadEvent()
QAbstractSocket SetConnectedEvent()
SetDisconnectedEvent()
SetErrorEvent()
SetHostFoundEvent()
SetProxyAuthenticationRequiredEvent()
SetStateChangedEvent()
QTcpSocket SetConnectedEvent()
SetDisconnectedEvent()
SetErrorEvent()
SetHostFoundEvent()
SetProxyAuthenticationRequiredEvent()
SetStateChangedEvent()
SetAboutToCloseEvent()
SetBytesWrittenEvent()
SetReadChannelFinishedEvent()
SetReadyReadEvent()
QColorDialog SetColorSelectedEvent()
SetCurrentColorChangedEvent()
QNetworkAccessManager SetFinishedEvent()
QThread SetStartedEvent()
SetFinishedEvent()

Methods to use Events with Events Filter

RingQt define a new class called QAllEvents that help you in using Events Filter

The next table presents the methods that we have

Methods to get parameters Class Name
getKeyCode() –> Number QAllEvents
getx() –> Number  
gety() –> Number  
getglobalx() –> Number  
getglobaly() –> Number  
getbutton() –> Number  
getbuttons() –> Number  

The next table presents the methods that we have to use events.

Method Name Class Name
setKeyPressEvent(cEvent) QAllEvents
setMouseButtonPressEvent(cEvent)  
setMouseButtonReleaseEvent(cEvent)  
setMouseButtonDblClickEvent(cEvent)  
setMouseMoveEvent(cEvent)  
setCloseEvent(cEvent)  
setContextMenuEvent(cEvent)  
setDragEnterEvent(cEvent)  
setDragLeaveEvent(cEvent)  
setDragMoveEvent(cEvent)  
setDropEvent(cEvent)  
setEnterEvent(cEvent)  
setFocusInEvent(cEvent)  
setFocusOutEvent(cEvent)  
setKeyReleaseEvent(cEvent)  
setLeaveEvent(cEvent)  
setNonClientAreaMouseButtonDblClickEvent(cEvent)  
setNonClientAreaMouseButtonPressEvent(cEvent)  
setNonClientAreaMouseButtonReleaseEvent(cEvent)  
setNonClientAreaMouseMoveEvent(cEvent)  
setMoveEvent(cEvent)  
setResizeEvent(cEvent)  
setWindowActivateEvent(cEvent)  
setWindowBlockedEvent(cEvent)  
setWindowDeactivateEvent(cEvent)  
setWindowStateChangeEvent(cEvent)  
setWindowUnblockedEvent(cEvent)  

The Difference between Qt and RingQt

  1. RingQt use simple methods to set the code that will be executed for events.

Syntax:

Set<Event_Name>Event(cEventCode)
  1. RingQt change the name of some methods to avoid conflict with Ring Keywords.

The next table present these little changes

Class Name Qt Method Name RingQt Method Name
QWebView load loadpage
QMediaPlaylist load loadfile
QMediaPlaylist next movenext
QPainter end endpaint
QPicture load loadfile
QLineEdit end endtext
QDialog done donedialog
QTextDocument end enddoc
QTextBlock next nextblock
QSqlQuery next movenext
QImage load loadimage
QNetworkAccessManager get getvalue
QNetworkAccessManager put putvalue
QThread exit exitfromthread
QRegularExpressionMatchIterator next nextitem
QCamera load loadcamera

RingQt Classes and their Qt Documentation

Qt Documentation : http://doc.qt.io/qt-5/classes.html

See the “RingQt Classes and Methods Reference” chapter for supported classes and methods.

New Classes names - Index Start from 1

We added new classes to RingQt - another version of classes where the class names doesn’t start with the “q” letter Also updated methods so the index start from 1 when we deal with the GUI controls like

  • ComboBox
  • ListWidget
  • TableWidget
  • TreeWidget

These classes are inside guilib.ring under the package name : System.GUI

To use it

load "guilib.ring"

import System.GUI

This doesn’t have any effect on our previous code, It’s just another choice for better code that is consistent with Ring rules.

Also the form designer is updated to provide us the choice between using classes where (index start from 0) or (index start from 1)

Example (Uses the Form Designer)

  1. https://github.com/ring-lang/ring/blob/master/applications/formdesigner/tests/indexstart/indexstartView.ring
  2. https://github.com/ring-lang/ring/blob/master/applications/formdesigner/tests/indexstart/indexstartController.ring

Creating Reports using the WebLib and the GUILib

The WebLib comes with a class called HtmlPage

Using this class we can create reports quickly using WebLib & GUILib together

Example:

load "stdlib.ring"
load "weblib.ring"
load "guilib.ring"

import System.Web
import System.GUI

new qApp {
        open_window(:CustomersReportController)
        exec()
}

class CustomersReportController

        oView = new CustomersReportView

        func Start
                CreateReport()

        func CreateReport
                mypage = new HtmlPage {
                        h1 { text("Customers Report") }
                        Table
                        {
                                style = stylewidth("100%") + stylegradient(4)
                                TR
                                {
                                        TD { WIDTH="10%"
                                                text("Customers Count : " )  }
                                        TD { text (100) }
                                }
                        }
                        Table
                        {
                                style = stylewidth("100%") + stylegradient(26)
                                TR
                                {
                                        style = stylewidth("100%") +
                                                stylegradient(24)
                                        TD { text("Name " )  }
                                        TD { text("Age" ) }
                                        TD { text("Country" ) }
                                        TD { text("Job" ) }
                                        TD { text("Company" ) }
                                }
                                for x =  1 to 100
                                        TR
                                        {
                                                TD { text("Test" )  }
                                                TD { text("30" ) }
                                                TD { text("Egypt" ) }
                                                TD { text("Sales" ) }
                                                TD { text("Future" ) }
                                        }
                                next
                        }
                }
                write("report.html",mypage.output())

        func PrintEvent
                printer1 = new qPrinter(0) {
                        setoutputformat(1)
                        setoutputfilename("report.pdf")
                }
                oView {
                        web.print(printer1)
                        web.show()
                }
                system ("report.pdf")

class CustomersReportView

                win = new window() {
                                setwindowtitle("Report Window")
                                setgeometry(100,100,500,500)
                                web = new webview(win) {
                                        setgeometry(100,100,1000,500)
                                        loadpage(new qurl("file:///"+
                                        currentdir()+"/report.html"))
                                }
                                new pushbutton(win) {
                                                setGeometry(100,20,100,30)
                                                settext("Print")
                                                setclickevent(Method(:PrintEvent))
                                }
                                showMaximized()
                        }

Screen Shot:

Customers Report