The Ring programming language version 1.5.3 book - Part 75 of 184

1. Ring Documentation, Release 1.5.3
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
56.34. Drawing using QPainter 615

2. Ring Documentation, Release 1.5.3
56.35 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()
56.35. Printing using QPrinter 616

3. Ring Documentation, Release 1.5.3
}
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")
56.36 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()
}
56.36. Creating More than one Window 617

4. Ring Documentation, Release 1.5.3
func second
win2 = new qwidget() {
setwindowtitle("Second")
setgeometry(100,100,500,500)
setwindowflags(Qt_dialog)
show()
}
The application during the runtime
56.37 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()
}
56.38 Using the QColorDialog Class
Example:
56.37. Playing Sound 618

5. Ring Documentation, Release 1.5.3
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
56.38. Using the QColorDialog Class 619

6. Ring Documentation, Release 1.5.3
56.39 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
56.40 Movable Label Example
Load "guilib.ring"
new qApp {
win1 = new qWidget()
{
56.39. Using qLCDNumber Class 620

7. Ring Documentation, Release 1.5.3
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
56.41 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)
56.41. QMessagebox Example 621

8. Ring Documentation, Release 1.5.3
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
56.42 Using QInputDialog Class
In the next example we will learn about using the QInputDialog class
56.42. Using QInputDialog Class 622

9. Ring Documentation, Release 1.5.3
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
56.42. Using QInputDialog Class 623

10. Ring Documentation, Release 1.5.3
56.43 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
}
56.43. Dialog Functions 624