This document provides examples of using various Qt GUI classes in Ring. It includes examples of using QListWidget to display a list of items, QTreeView to represent a file system, QTreeWidget and QTreeWidgetItem to create a tree structure, QComboBox to display a drop-down list, QMenuBar to create a menu bar, context menus, and QToolBar to create a toolbar. The examples demonstrate how to initialize and configure instances of these classes and add functionality like click events.

1. Ring Documentation, Release 1.5.4
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
56.4. Using the QListWidget Class 575

2. Ring Documentation, Release 1.5.4
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()
56.4. Using the QListWidget Class 576

3. Ring Documentation, Release 1.5.4
win1.setwindowtitle("After Delete - NbrOfItems: " + nbrOfItems +
" CurItemNbr: " + curItemNbr +" CurValue: " + curValue )
}
56.5 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
56.5. Using QTreeView and QFileSystemModel 577

4. Ring Documentation, Release 1.5.4
56.6 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)
56.6. Using QTreeWidget and QTreeWidgetItem 578

5. Ring Documentation, Release 1.5.4
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
56.7 Using QComboBox Class
In this example we will learn about using the QComboBox class
56.7. Using QComboBox Class 579

6. Ring Documentation, Release 1.5.4
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
56.8 Creating Menubar
In this example we will learn about using the QMenuBar class
56.8. Creating Menubar 580

7. Ring Documentation, Release 1.5.4
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) {
56.8. Creating Menubar 581

8. Ring Documentation, Release 1.5.4
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
56.8. Creating Menubar 582

9. Ring Documentation, Release 1.5.4
56.9 Context Menu
Example:
load "guilib.ring"
new qApp {
win = new qwidget() {
setwindowtitle("Context Menu")
resize(400,400)
myfilter = new qAllEvents(win) {
setContextmenuEvent("mymenu()")
}
installeventfilter(myfilter)
show()
}
exec()
}
func mymenu
new qMenu(win) {
oAction = new qAction(win) {
settext("new")
SetCLickevent("See :New")
56.9. Context Menu 583

10. Ring Documentation, Release 1.5.4
}
addaction(oAction)
oAction = new qAction(win) {
settext("open")
SetCLickevent("See :Open")
}
addaction(oAction)
oAction = new qAction(win) {
settext("save")
SetCLickevent("See :Save")
}
addaction(oAction)
oAction = new qAction(win) {
settext("close")
SetCLickevent("See :Close")
}
addaction(oAction)
oCursor = new qCursor()
exec(oCursor.pos())
}
56.10 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()
}
56.10. Creating Toolbar 584