AppDelegate.m

/*
     File: AppDelegate.m 
 Abstract: application delegate. 
  Version: 1.2 
  
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 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION 
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 */
 
#import "AppDelegate.h"
#import "MyWindowController.h"
 
@implementation AppDelegate
 
// -------------------------------------------------------------------------------
//  newDocument:sender
// -------------------------------------------------------------------------------
- (IBAction)newDocument:(id)sender
{   
    if (myWindowController == nil)
    {
        myWindowController = [[MyWindowController alloc] initWithWindowNibName:@"TestWindow"];
    }
    [myWindowController showWindow:self];
}
 
// -------------------------------------------------------------------------------
//  applicationDidFinishLaunching:notification
// -------------------------------------------------------------------------------
- (void)applicationDidFinishLaunching:(NSNotification*)notification
{
    [self newDocument:self];
}
 
// -------------------------------------------------------------------------------
//  validateMenuItem:theMenuItem
// -------------------------------------------------------------------------------
- (BOOL)validateMenuItem:(NSMenuItem *)theMenuItem
{
    BOOL enable = [self respondsToSelector:[theMenuItem action]];
 
    // disable "New" if the window is already up
    if ([theMenuItem action] == @selector(newDocument:))
    {
        if ([[myWindowController window] isKeyWindow])
        {
            enable = NO;
        }
    }
    return enable;
}
 
@end