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{
controldemo.pas
*****************************************************************************
* *
* This demonstration program is public domain, which means no copyright, *
* but also no warranty! *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
* *
*****************************************************************************
This application will create a window with two buttons in it
When you click the button 'Hello Button',
it will show or hide (alternating with each click) a text on the window
When you click the button 'Show Dialog', it will show a modal message dialog
Author: Felipe Monteiro de Carvalho
Contributors: Ingemar Ragnemalm
}
program controldemo;
{$mode delphi}
uses
SysUtils, FPCMacOSAll, MacPas;
var
mainWindow: WindowRef;
contentView: HIViewRef;
button1, button2: ControlRef;
staticText: ControlRef;
showTextFlag: Boolean = false;
const
kButtonHello = 'HELO';
kButtonMessage = 'MSGE';
{ implementation of the functions }
{ Functions to easely generate carbon structures }
function GetQDRect(Left, Top, Width, Height: Integer): FPCMacOSAll.Rect;
begin
result.Left := Left;
result.Top := Top;
result.Right := Left + Width;
result.Bottom := Top + Height;
end;
{ Shows a message box }
procedure DoShowMessage(ATitle, AMsg: string);
var
outItemHit: SInt16;
err: OSErr;
begin
err := StandardAlert(kAlertNoteAlert, ATitle, AMsg, nil, outItemHit);
end;
{ Event handling routines }
{ Here we alternate the visibility status of the static text
with each button click }
function ButtonHelloPressed: OSStatus;
begin
result := 0;
showTextFlag := not showTextFlag;
if showTextFlag then HIViewSetVisible(staticText, True)
else HIViewSetVisible(staticText, False);
end;
function ButtonMessagePressed: OSStatus;
begin
result := 0;
DoShowMessage('Standard message dialog', 'This dialog is modal');
end;
{ Message handling function }
function WindowCommandHandler(nextHandler: EventHandlerCallRef; theEvent: EventRef; userDataPtr: UnivPtr): OSStatus; cdecl;
var
status: OSStatus;
ignoreresult: OSStatus;
aCommand: HICommand;
begin
status := eventNotHandledErr;
ignoreresult := GetEventParameter(theEvent, kEventParamDirectObject,
typeHICommand, nil, sizeof(aCommand), nil, @aCommand);
if aCommand.commandID = FOUR_CHAR_CODE(kButtonHello) then status := ButtonHelloPressed()
else if aCommand.commandID = FOUR_CHAR_CODE(kButtonMessage) then status := ButtonMessagePressed();
result := status;
end;
{ Initialization and finalization routines }
procedure Initialize;
var
status, ignoreResult: OSStatus;
cmdEvent: EventTypeSpec;
eventHandler: EventHandlerUPP;
fontStyle: ControlFontStyleRec;
begin
status := CreateNewWindow(kDocumentWindowClass,
(kWindowStandardDocumentAttributes or kWindowStandardHandlerAttribute
or kWindowCompositingAttribute),
GetQDRect(100, 100, 350, 350), mainWindow);
if (status <> noErr) or (mainWindow = nil) then
begin
DoShowMessage('Error', 'CreateNewWindow failed');
Exit;
end;
ignoreResult := SetWindowTitleWithCFString(mainWindow, CFSTRP('Carbon FPC Controls Demo'));
ignoreResult := HIViewFindByID(HIViewGetRoot(mainWindow), kHIViewWindowContentID, contentView);
{ Add events }
cmdEvent.eventClass := kEventClassCommand;
cmdEvent.eventKind := kEventCommandProcess;
eventHandler := NewEventHandlerUPP(@WindowCommandHandler);
ignoreResult := InstallEventHandler(GetWindowEventTarget(mainWindow),
eventHandler, 1, @cmdEvent, nil, nil);
{ Creates the hello button }
ignoreResult := CreatePushButtonControl(nil, GetQDRect(50, 200, 100, 50),
CFSTRP('Hello Button'), button1);
ignoreResult := HIViewAddSubview(contentView, button1);
ignoreResult := SetControlCommandID(button1, FOUR_CHAR_CODE(kButtonHello));
ignoreResult := HIViewSetVisible(button1, TRUE);
{ Creates the message button }
ignoreResult := CreatePushButtonControl(nil, GetQDRect(200, 200, 100, 50),
CFSTRP('Show Dialog'), button2);
ignoreResult := HIViewAddSubview(contentView, button2);
ignoreResult := SetControlCommandID(button2, FOUR_CHAR_CODE(kButtonMessage));
ignoreResult := HIViewSetVisible(button2, TRUE);
{ Creates the text control }
fontStyle.flags := kControlUseJustMask or kControlUseSizeMask;
fontStyle.just := teCenter;
fontStyle.size := 30;
ignoreResult := CreateStaticTextControl(mainWindow,
GetQDRect(0, 50, 350, 50), nil, @fontStyle, staticText);
ignoreResult := HIViewAddSubview(contentView, staticText);
ignoreResult := HIViewSetVisible(staticText, FALSE);
HIViewSetText(staticText, CFSTRP('Hello Controls!'));
{ Shows the window }
ShowWindow(mainWindow);
end;
procedure DoCloseWindow(theWind: WindowRef);
var
theEvent: EventRef;
begin
CreateEvent(nil, kEventClassWindow, kEventWindowClose, GetCurrentEventTime, kEventAttributeNone, theEvent);
SetEventParameter(theEvent, kEventParamDirectObject, typeWindowRef, sizeof(WindowRef), theWind);
SendEventToEventTarget(theEvent, GetWindowEventTarget(theWind));
end;
{ Closes all windows, so they have time to save any user data (none in this case) }
procedure Finalize;
begin
DoCloseWindow(mainWindow);
end;
{ Main program section }
begin
Initialize();
RunApplicationEventLoop();
Finalize();
end.
|
