The Ring programming language version 1.9 book - Part 78 of 210

Ring Documentation, Release 1.9
}
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
func pRead
cOutput += "Ready Read!" + nl
cOutput += oTcpSocket.readall().data() + nl
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
Func pNewConnection
oTcpClient = oTcpServer.nextPendingConnection()
64.53. Simple Client and Server Example 739

cOutput += "Accept Connection" + nl
oTcpClient {
cStr ="Hello from server to client!"+char(13)+char(10)
write(cStr,len(cStr))
flush()
waitforbyteswritten(300000)
close()
}
The application during the runtime
64.54 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")
64.54. Dynamic Objects 740

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
64.55 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
64.55. Weight History Application 741

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()
cTime = myitem.text()
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

64.56 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"
64.56. Notepad Application 745

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")
} ,
setbtnimage(self,"image/open.png")
setclickevent("pOpen()")
settooltip("Open File")
} ,
setbtnimage(self,"image/save.png")
setclickevent("pSave()")
settooltip("Save")
} ,
setbtnimage(self,"image/saveas.png")
setclickevent("pSaveAs()")
settooltip("Save As")
} ,
setbtnimage(self,"image/cut.png")
setclickevent("pCut()")
settooltip("Cut")
} ,
setbtnimage(self,"image/copy.png")
setclickevent("pCopy()")
settooltip("Copy")
} ,
setbtnimage(self,"image/paste.png")
setclickevent("pPaste()")
settooltip("Paste")
} ,
setbtnimage(self,"image/font.png")
setclickevent("pFont()")
settooltip("Font")
} ,
setbtnimage(self,"image/colors.jpg")
setclickevent("pColor()")
settooltip("Text Color")

} ,
setbtnimage(self,"image/search.png")
setclickevent("pFind()")
settooltip("Find and Replace")
} ,
setbtnimage(self,"image/print.png")
setclickevent("pPrint()")
settooltip("Print")
} ,
setbtnimage(self,"image/debug.png")
setclickevent("pDebug()")
settooltip("Debug (Run then wait!)")
} ,
setbtnimage(self,"image/run.png")
setclickevent("pRun()")
settooltip("Run the program")
} ,
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)
setShortcut(new QKeySequence("Ctrl+o"))
setbtnimage(self,"image/open.png")
settext("Open")
setclickevent("pOpen()")
}
addaction(oAction)
addseparator()
setShortcut(new QKeySequence("Ctrl+s"))
setbtnimage(self,"image/save.png")
settext("Save")
setclickevent("pSave()")

}
addaction(oAction)
addseparator()
setShortcut(new QKeySequence("Ctrl+e"))
setbtnimage(self,"image/saveas.png")
settext("Save As")
setclickevent("pSaveAs()")
}
addaction(oAction)
addseparator()
setShortcut(new QKeySequence("Ctrl+p"))
setbtnimage(self,"image/print.png")
settext("Print to PDF")
setclickevent("pPrint()")
}
addaction(oAction)
addseparator()
setShortcut(new QKeySequence("Ctrl+d"))
setbtnimage(self,"image/debug.png")
settext("Debug (Run then wait!)")
setclickevent("pDebug()")
}
addaction(oAction)
addseparator()
setShortcut(new QKeySequence("Ctrl+r"))
settext("Run")
setclickevent("pRun()")
}
addaction(oAction)
addseparator()
setShortcut(new QKeySequence("Ctrl+F5"))
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 {
setShortcut(new QKeySequence("Ctrl+x"))
setbtnimage(self,"image/cut.png")
settext("Cut")
setclickevent("pCut()")

The Ring programming language version 1.9 book - Part 78 of 210

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The Ring programming language version 1.9 book - Part 78 of 210