flashscreen.m

flashscreen.m

//
//  flashscreen.m
//  Command Utility
//
//  Copyright Cucurbita. All rights reserved.
//

// gcc -framework AppKit flashscreen.m -o flashscreen
// gcc -DHAVE_WINDOW_FADE -framework AppKit flashscreen.m -o flashscreen

#import <AppKit/AppKit.h>

@interface flashscreenWindow : NSWindow {

}

@end

@implementation flashscreenWindow

- (id)initFullScreen 
{
    if ((self = [super initWithContentRect:[[NSScreen mainScreen] frame] styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:NO])) {
    	[self setBackgroundColor: [NSColor whiteColor]];
    	[self setLevel:CGShieldingWindowLevel()];
#ifdef HAVE_WINDOW_FADE
		[self setAlphaValue:0.0];
#else
		[self setAlphaValue:0.3];
#endif
		[self setOpaque:NO];
    	[self setHasShadow:NO];
    }
    return self;
}

@end

@interface flashscreenDelegate: NSObject {
	flashscreenWindow *window;
}

@end

@implementation flashscreenDelegate

- (void)dealloc
{
	if (window) {
		[window release];
	}
	[super dealloc];
}

- (void)applicationWillFinishLaunching:(NSNotification *)aNotification
{
	window = [[flashscreenWindow alloc] initFullScreen];
	[window makeKeyAndOrderFront:self];

#ifdef HAVE_WINDOW_FADE
	float alpha = 0.0;
	int i = 0;
	for (i = 0; i < 3; i++) {
		alpha += 0.1;
		[window setAlphaValue:alpha];
		[NSThread sleepForTimeInterval:0.040];
	}
	
	for (i = 0; i < 6; i++) {
		alpha -= 0.05;
		[window setAlphaValue:alpha];
		[NSThread sleepForTimeInterval:0.020];
	}
	
	[[NSApplication sharedApplication] terminate:self];
#else
    [NSTimer scheduledTimerWithTimeInterval:0.2
		target:self selector:@selector(terminateFlashScreen:) userInfo:nil repeats:NO];
#endif
}

#ifndef HAVE_WINDOW_FADE

- (void)terminateFlashScreen:(NSTimer *)timer
{
	[timer invalidate];
	[[NSApplication sharedApplication] terminate:self];
}

#endif

- (void)applicationWillTerminate:(NSNotification *)aNotification
{
	if (window) {
 		[window orderOut:self];
 	}
}

@end

int main(int argc, const char **argv)
{
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	
	[[NSApplication sharedApplication] setDelegate:[flashscreenDelegate new]];
	[[NSApplication sharedApplication] run];
  	
  	[pool drain];
  	
  	return 0;
}

/* EOF */

https://github.com/cucurbita/inutero/tree/master/obj-C/FlashScreen