Quote from Forum Archives on September 8, 2011, 3:15 pm

Posted by: svanvoorst <svanvoorst@...>

This demo shows how to construct menus in obj-c.  Both NSMenuItem and NSMenu are required; each menuItem has its own method, monitored by a controller.  Also note a custom method which displays an alert for each selection (except the hierarchical submenu).

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

/////////////////////////////////////////

// FBtoC Preferences Settings:               //

//   Requires 10.6 Base SDK                   //

//  "Compile As Objective-C" checked    //

//     or Un-REM first line below             //

/////////////////////////////////////////

//compile as "Objective-C"

BeginCDeclaration

@interface AppController : NSObject

{

}

- (void) doAlert: (int) menuNum item: (int)itemNum;

- (void) menu2Item1:(id)sender;

- (void) menu2Item2:(id)sender;

- (void) menu3Item1Submenu1:(id)sender;

- (void) menu3Item2:(id)sender;

@end //interface

EndC

BeginCFunction

@implementation AppController

- (void) doAlert: (int) menuNum item: (int) itemNum

{

   NSAlert *alert = [[NSAlert alloc]init];

   [alert setAlertStyle: NSInformationalAlertStyle];

   NSString *str = [[NSString alloc]initWithFormat:@"You chose menu %d, item %d.", menuNum,itemNum];

   [alert setInformativeText:str];

   [str release];

   [alert runModal];

   [alert release];  

}

- (void) menu2Item1:(id)sender

{

  [self doAlert:2 item:1]; 

}

- (void) menu2Item2:(id)sender

{

  [self doAlert:2 item:2]; 

}

- (void) menu3Item1Submenu1:(id)sender

{

 NSAlert *alert = [[NSAlert alloc]init];

 [alert setAlertStyle: NSInformationalAlertStyle];

 [alert setInformativeText:@"You chose menu 3, item 1, subMenu 1."];

 [alert runModal];

 [alert release]; 

}

- (void) menu3Item2:(id)sender

{

  [self doAlert:3 item:2]; 

}

@end //implementation

EndC

BeginCCode

{

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

 [NSApplication sharedApplication];

 [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];

// --- Create an instance of the controller class --- //

id myController = [[AppController alloc]init];

// ******** Menubar and AppMenu ********//

  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];

// ******** Menu 2 ******* //

NSMenuItem *myNewMenu2 = [[[NSMenuItem alloc] init] autorelease];

[menubar addItem:myNewMenu2];

NSMenu *menu2 = [[[NSMenu alloc] initWithTitle:@"Menu 2"] autorelease];

[myNewMenu2 setSubmenu:menu2];

// ******** Menu 2 Item1 ******* //

 id menu2Item1 = [[[NSMenuItem alloc]initWithTitle:@"Item One..."

        action:@selector(menu2Item1:) keyEquivalent:@"o"] autorelease];

 [menu2 addItem:menu2Item1];

 [menu2Item1 setTarget:myController];

// ******** Menu 2 Item2 ******* //

 id menu2Item2 = [[[NSMenuItem alloc]initWithTitle:@"Item Two..."

        action:@selector(menu2Item2:) keyEquivalent:@"t"] autorelease];

 [menu2 addItem:menu2Item2];

 [menu2Item2 setTarget:myController];

// ******** Menu 3 ******** //

NSMenuItem *myNewMenu3 = [[[NSMenuItem alloc] init] autorelease];

[menubar addItem:myNewMenu3];

NSMenu *menu3 = [[[NSMenu alloc] initWithTitle:@"Menu 3"] autorelease];

[myNewMenu3 setSubmenu:menu3];

// ******** Menu 3 Item1 ******* //

 id menu3Item1 = [[[NSMenuItem alloc]initWithTitle:@"Item One"

        action:nil keyEquivalent:@""] autorelease];

 [menu3 addItem:menu3Item1];

// ******* Menu 3 Item1 Submenu1 ********* //

 NSMenuItem *myNewSubmenu1 = [[[NSMenuItem alloc] initWithTitle:@"Submenu 1..." 

    action:@selector(menu3Item1Submenu1:) keyEquivalent:@"9"] autorelease];

 NSMenu *subMenu1 = [[[NSMenu alloc] init] autorelease];

 [menu3Item1 setSubmenu:subMenu1];

 [subMenu1 addItem:myNewSubmenu1];

 [myNewSubmenu1 setTarget:myController];

// ******** Menu 3 Item2 ******* //

 id menu3Item2 = [[[NSMenuItem alloc]initWithTitle:@"Item Two..."

        action:@selector(menu3Item2:) keyEquivalent:@"t"] autorelease];

 [menu3 addItem:menu3Item2];

 [menu3Item2 setTarget:myController];

    

// ******** Window ******** //

  #define _wndW  400

  #define _wndH  280

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

        styleMask:NSTitledWindowMask | NSClosableWindowMask

           backing:NSBackingStoreBuffered

               defer:NO];

 [window center];

 [window setTitle:@"Menu Building_demo"];

 [window makeKeyAndOrderFront:nil];

// ***** 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];

[NSApp activateIgnoringOtherApps:YES];

[NSApp run];

[myController release];

[pool drain];

}

EndC

'------ end ----------- 

Steve Van Voorst

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