Quote from Forum Archives on October 6, 2012, 12:00 pm

Posted by: svanvoorst <svanvoorst@...>

Remember how easy it was to use _efClick in FB?  This is what you have to do in order to accomplish the same thing in Cocoa: first subclass NSTextField and then use the mouseDown: event.  If anyone knows an easier or more direct method, please post.

'------ start --------

/*

  Demonstrates trapping clicks on NSTextFields.

  Text fields are subclassed and use a mouseDown: event

   to trap clicks.

   Written by S.Van Voorst   {20121006}

*/

BeginCDeclaration

@interface TextField : NSTextField

{

  BOOL isInside;

}

//methods automatically called

@end  //interface

EndC

BeginCFunction

@implementation TextField : NSTextField;

- (id)initWithFrame:(NSRect)frameRect

{

 if ((self = [super initWithFrame:frameRect]) != nil) 

 {

  self = [super initWithFrame:frameRect];

  // Add initialization code here

 }

 return self;

}

- (void) mouseDown:(NSEvent *)event

{

 NSPoint wndPt = [event locationInWindow];

 NSPoint pt = [self convertPoint:wndPt fromView:nil];

 // ***** Corrects for Embedder View being flipped ***** //

 isInside = [self mouse:pt inRect:[self bounds]];

 if (isInside == YES) NSBeep();  

}

@end //implementation

EndC

BeginCDeclaration

@interface EmbedderView : NSView

//methods automatically called

@end  //interface

EndC

BeginCFunction

@implementation EmbedderView : NSView;

- (id)initWithFrame:(NSRect)frameRect

{

 if ((self = [super initWithFrame:frameRect]) != nil) 

 {

  self = [super initWithFrame:frameRect];

  // Add initialization code here

 }

 return self;

}

- (void)drawRect:(NSRect)rect

{

// ****** Background ***** //

[[NSColor whiteColor] set];

[NSBezierPath fillRect:rect];

}

// ----- Use this if you want 0,0 (origin) to be top, left ---- //

// ----- Otherwise origin will be at bottom, left (Unflipped) ----- //

-(BOOL)isFlipped

{

 return YES;

}

@end //implementation

EndC

BeginCDeclaration

@interface MyDelegate : NSObject

{

  NSWindow *window;

}

- (void) createMenu;

- (void) createWindow;

@end

EndC

BeginCFunction

@implementation MyDelegate : NSObject 

- (void) dealloc

{

  [window release];

  [super dealloc];

}

- (void) createMenu

{

// ******** Menu and menubar ********//

  id menubar = [[NSMenu new] autorelease];

  id appMenuItem = [[NSMenuItem new] autorelease];

  [menubar addItem:appMenuItem];

  [NSApp setMainMenu:menubar];

  id appMenu = [[NSMenu new] autorelease];

  id quitMenuItem = [[[NSMenuItem alloc] initWithTitle:@"Quit"

        action:@selector(terminate:) keyEquivalent:@"q"] autorelease];

  [appMenu addItem:quitMenuItem];

  [appMenuItem setSubmenu:appMenu];

}

- (void) createWindow

{

  // ***** window ***** //

  #define _wndW  600

  #define _wndH  350

  window = [[NSWindow alloc] initWithContentRect: NSMakeRect( 0, 0, _wndW, _wndH )

                       styleMask: NSTitledWindowMask | NSMiniaturizableWindowMask | NSClosableWindowMask

                       backing: NSBackingStoreBuffered

                       defer: NO];

  [window center];

  [window setTitle: @"Text Field Click"];

// ***** Create an instance of EmbedderView (NSView) ***** //

 EmbedderView *baseView = [[EmbedderView alloc]initWithFrame:NSMakeRect( 20, 80, _wndW - 40, _wndH - 100 )];

 [[window contentView] addSubview:baseView];

 [baseView release];

 // **** Prevent focus on first text field upon opening ***** //

 [window setInitialFirstResponder:baseView];

// ***** Subclassed Text Fields **** //

 TextField *txtFld[3];

 NSRect efR[3];

 efR[0] = NSMakeRect( 30, 80, 140, 30 );

 txtFld[0] = [[TextField alloc]initWithFrame:efR[0]];

 [baseView addSubview:txtFld[0]];

 [txtFld[0] release];

 efR[1] = NSOffsetRect( efR[0], 160, 0);

 txtFld[1] = [[TextField alloc]initWithFrame:efR[1]];

 [baseView addSubview:txtFld[1]];

 [txtFld[1] release];

 efR[2] = NSOffsetRect( efR[1], 160, 0);

 txtFld[2] = [[TextField alloc]initWithFrame:efR[2]];

 [baseView addSubview:txtFld[2]];

 [txtFld[2] release];

// ***** Quit btn ***** //

 NSButton *quitBtn = [[NSButton alloc]initWithFrame:NSMakeRect( _wndW - 130, 30, 95, 30 )];

 [quitBtn setBezelStyle:NSRoundedBezelStyle ];

 [quitBtn setTitle: @"Quit" ];

 [quitBtn setAction:@selector(terminate:)];

 [[window contentView] addSubview: quitBtn];

 [quitBtn release];

}

- (void) applicationWillFinishLaunching: (NSNotification *)not

{

  [self createMenu];

  [self createWindow];

}

- (void) applicationDidFinishLaunching: (NSNotification *)not;

{

  [window makeKeyAndOrderFront: nil];

}

@end

EndC

BeginCCode

  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init];

  [NSApplication sharedApplication];

  [NSApp setDelegate: [MyDelegate new]];

  [NSApp run];

  [pool drain];

EndC

'------ end -------

Steve Van Voorst

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