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POkeyDown and NSTableViewCocoa
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  1. POkeyDown and NSTableViewCocoa
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    copied!<p>I have a Cocoa application that gets the input from an NSScrollView and then wants to output some information on the key pressed, such as the keyCode, modifier etc.</p> <p>The problem is that I am getting an EXC_BAD_ACCESS error at runtime. There are no compiler errors before runtime.</p> <p>The code for the program is listed below:</p> <p>keyboardModel.h</p> <pre><code>#import &lt;Cocoa/Cocoa.h&gt; @interface keyboardModel : NSObject { NSString* charac; NSString* keyc; NSString* modif; } -(void) setValues: (NSString *) a :(NSString *)b :(NSString *) c; @property (copy) NSString* charac; @property (copy) NSString* keyc; @property (copy) NSString* modif; @end </code></pre> <p>keyboardModel.m</p> <pre><code>#import "keyboardModel.h" #import "MyController.h" @implementation keyboardModel @synthesize charac; @synthesize keyc; @synthesize modif; -(void) setValues: (NSString *) a :(NSString *)b :(NSString *) c{ charac = [charac stringByAppendingString:a]; keyc = [keyc stringByAppendingString:b]; modif = [modif stringByAppendingString:c]; } -(id) init { self = [super init]; if (self) { charac = @"dddd"; keyc = @"xxx"; modif = @"xxx"; } return self; } @end </code></pre> <p>MyController.h</p> <pre><code>#import &lt;Cocoa/Cocoa.h&gt; @interface MyController : NSObject&lt;NSTableViewDataSource&gt; { IBOutlet id typingArea; IBOutlet NSTableView *tableView; NSMutableArray *list; } -(void)showKeyDownEvent:(NSEvent *)theEvent; @end </code></pre> <p>MyController.m</p> <pre><code>#import "MyController.h" #import "MyTextView.h" #import "keyboardModel.h" #import &lt;Carbon/Carbon.h&gt; static const int INS_MOD_FLAG_OPTION_KEY = (optionKey &gt;&gt; 8) &amp; 0xff; static const int INS_MOD_FLAG_SHIFT_KEY = (shiftKey &gt;&gt; 8) &amp; 0xff; static const int INS_MOD_FLAG_CONTROL_KEY = (controlKey &gt;&gt; 8) &amp; 0xff; static const int INS_MOD_FLAG_ALPHA_LOCK = (alphaLock &gt;&gt; 8) &amp; 0xff; static const int INS_MOD_FLAG_CMD_KEY = (cmdKey &gt;&gt; 8) &amp; 0xff; @implementation MyController - (id) init { self = [super init]; if (self) { list = [[NSMutableArray alloc] init]; } return self; } static NSString* print_mods(UInt32 unl_mods) { NSString *modifiers = [NSString stringWithFormat:@""]; if(unl_mods &amp; NSAlphaShiftKeyMask) modifiers = [NSString stringWithFormat:@"%@ Caps Lock", modifiers]; if(unl_mods &amp; NSShiftKeyMask) modifiers = [NSString stringWithFormat:@"%@ Shift Key", modifiers]; if(unl_mods &amp; NSControlKeyMask) modifiers = [NSString stringWithFormat:@"%@ Control Key", modifiers]; if(unl_mods &amp; NSAlternateKeyMask) modifiers = [NSString stringWithFormat:@"%@ Alt Key", modifiers]; if (unl_mods == 384) modifiers = [NSString stringWithFormat:@"No Modifier"]; return modifiers; } -(void)showKeyDownEvent:(NSEvent *)e { //%x - hex value //%d - decimal value NSString* myNewString1 = [NSString stringWithFormat:@"%x(%d)", [e keyCode], [e keyCode]]; NSString* myNewString2 = [NSString stringWithFormat:@"%d", [e modifierFlags]]; NSString* flagReplace = [NSString stringWithFormat:@""]; int value = [myNewString2 intValue]; NSLog (@"%d",value); flagReplace = print_mods ([e modifierFlags]); NSString *temp1 = [@"Character: " stringByAppendingString: [e characters]]; NSString *temp2 = [@" Keycode: " stringByAppendingString: myNewString1]; NSString *temp3 = [@" Modifier: " stringByAppendingString: flagReplace]; keyboardModel *km = [[keyboardModel alloc] init]; [km setValues:temp1:temp2:temp3]; [list addObject: km]; [tableView reloadData]; } - (id) tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row{ keyboardModel *p = [list objectAtIndex:row]; NSString* identifier = [tableColumn identifier]; return [p valueForKey: identifier]; } -(NSInteger) numberOfRowsInTableView : (NSTableView *) tableView { return [list count]; } // closing the last window quits the app - (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)theApplication { return YES; } @end </code></pre> <p>MyTextView.h</p> <pre><code>#import &lt;Cocoa/Cocoa.h&gt; @interface MyTextView : NSTextView { IBOutlet id controller; } @end </code></pre> <p>MyTextView.m</p> <pre><code>#import "MyTextView.h" #import "MyController.h" @implementation MyTextView - (void)keyDown:(NSEvent *)theEvent { [controller showKeyDownEvent: theEvent]; [super keyDown: theEvent]; } @end </code></pre> <p>Sorry for the long winding code, but the error is driving me nuts. Thanks for any help!</p>
 

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