In the code below I am Initialising a NSViewController
[a NSResponder], with a NSWindow
, a NSOpenGLView
, presenting the view and attempting to set the NSViewController
as the windows first responder.
It is not working. I was expecting to be able to hit a breakpoint in the keyUp:
and keyDown:
methods also below, but nothing is happening.
Am I missing something?
-(void)initwithFrame:(CGRect)frame
{
window = [[MyNSWindow alloc] initWithContentRect:frame styleMask:NSClosableWindowMask | NSTitledWindowMask backing:NSBackingStoreBuffered defer: YES ];
OpenGLView* glView = [[[OpenGLView alloc] initWithFrame:window.frame] autorelease];
window.contentView = glView;
[window makeFirstResponder:self];
[window makeKeyWindow];
[window display];
}
-(void)keyDown:(NSEvent*)theEvent
{
unichar unicodeKey = [ [ theEvent characters ] characterAtIndex:0 ];
unicodeKey = 0;
}
-(void)keyUp:(NSEvent *)theEvent
{
unichar unicodeKey = [ [ theEvent characters ] characterAtIndex:0 ];
unicodeKey = 0;
}
Returning to this issue, actually the problem is elsewhere.
I had been using this sleep function to control the apps frame rate:
void System::Sleep(double seconds)
{
NSDate* limit = [NSDate dateWithTimeIntervalSinceNow:seconds];
NSRunLoop* runLoop = [NSRunLoop currentRunLoop];
[runLoop runUntilDate:limit];
}
Doing this seems to freeze the system completely and block the key events.
Instead use this to schedule the update function:
[NSTimer scheduledTimerWithTimeInterval:interval target:self selector:@selector(updateApp:) userInfo:nil repeats:YES];
For instances to participate in key-view loops, a custom view must return YES from acceptsFirstResponder.
I had this problem also. This thread might help
keyDown not being called
I found out what was preventing the keyDown event from being called. It was the NSBorderlessWindowMask mask, it prevents the window from become the key and main window. So I have created a subclass of NSWindow called BorderlessWindow:
@interface BorderlessWindow : NSWindow { }
@end
@implementation BorderlessWindow
- (BOOL)canBecomeKeyWindow {
return YES; }
- (BOOL)canBecomeMainWindow {
return YES; }
@end
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