+ __idle = NO;
+
+ [self setWindowVisibility:ITWindowVanishingState];
+ [self performVanishFromProgress:1.0 effectTime:_effectTime];
+}
+
+- (void)performVanishFromProgress:(float)progress effectTime:(float)time
+{
+ [_window setEffectProgress:progress];
+ _effectSpeed = (1.0 / (EFFECT_FPS * time));
+ if ( progress == 1.0 ) {
+ [self setPivot:0.0];
+ [_window setAlphaValue:1.0];
+ }
+
+ [_window orderFront:self];
+ _effectTimer = [NSTimer scheduledTimerWithTimeInterval:(1.0 / EFFECT_FPS)
+ target:self
+ selector:@selector(vanishStep)
+ userInfo:nil
+ repeats:YES];
+}
+
+- (void)vanishStep
+{
+ float interPivot = 1.0;
+ float progress = ([_window effectProgress] - _effectSpeed);
+
+ progress = ( (progress > 0.0) ? progress : 0.0);
+
+ [_window setEffectProgress:progress];
+
+ interPivot = (( sin(([_window effectProgress] * pi) - (pi / 2)) + 1 ) / 2);
+ [self setPivot:(315 + (interPivot * 45))];
+ [_window setAlphaValue:interPivot];
+
+ if ( progress <= 0.0 ) {
+ [self vanishFinish];
+ }
+}
+
+- (void)vanishFinish
+{
+ [_effectTimer invalidate];
+ _effectTimer = nil;
+ [_window orderOut:self];
+ [_window setAlphaValue:1.0];
+ [self setPivot:0.0];
+ [self setWindowVisibility:ITWindowHiddenState];
+
+ __idle = YES;
+
+ if ( __shouldReleaseWhenIdle ) {
+ [self release];
+ }
+}
+
+- (void)cancelVanish
+{
+ [self setWindowVisibility:ITWindowAppearingState];
+
+ [_effectTimer invalidate];
+ _effectTimer = nil;
+
+ [self performAppearFromProgress:[_window effectProgress] effectTime:(_effectTime / 3.5)];
+}
+
+
+/*************************************************************************/
+#pragma mark -
+#pragma mark PRIVATE METHOD IMPLEMENTATIONS
+/*************************************************************************/
+
+- (void)setPivot:(float)angle
+{
+ int hPos = [_window horizontalPosition];
+ int vPos = [_window verticalPosition];
+ NSRect winFrame = [_window frame];
+
+ if ( (hPos == ITWindowPositionCenter) || (vPos == ITWindowPositionMiddle) ) {
+
+ CGAffineTransform transform;
+ NSPoint translation;
+
+ translation.x = -winFrame.origin.x;
+ translation.y = winFrame.origin.y + winFrame.size.height - [[NSScreen mainScreen] frame].size.height;
+
+ transform = CGAffineTransformMakeTranslation( translation.x, translation.y );
+
+ CGSSetWindowTransform([NSApp contextID],
+ (CGSWindowID)[_window windowNumber],
+ transform);
+ } else {
+ float degAngle;
+ CGAffineTransform transform;
+
+ if ( vPos == ITWindowPositionBottom ) {
+ if ( hPos == ITWindowPositionLeft ) {
+ angle = angle;
+ } else if ( hPos == ITWindowPositionRight ) {
+ angle = ( 45 - -(315 - angle) );
+ }
+ } else if ( vPos == ITWindowPositionTop ) {
+ if ( hPos == ITWindowPositionLeft ) {
+ angle = ( 45 - -(315 - angle) );
+ } else if ( hPos == ITWindowPositionRight ) {
+ angle = angle;
+ }
+ }
+
+ degAngle = (angle * (pi / 180));
+ transform = CGAffineTransformMakeRotation(degAngle);
+
+ if ( vPos == ITWindowPositionBottom ) {
+ transform.ty = winFrame.size.height;
+ } else if ( vPos == ITWindowPositionTop ) {
+ transform.ty = 0;
+ }
+
+ if ( hPos == ITWindowPositionLeft ) {
+ transform.tx = 0;
+ } else if ( hPos == ITWindowPositionRight ) {
+ transform.tx = winFrame.size.width;
+ }
+
+ transform = CGAffineTransformTranslate(transform, -winFrame.origin.x - transform.tx, winFrame.origin.y + winFrame.size.height - [[NSScreen mainScreen] frame].size.height - transform.ty);
+ CGSSetWindowTransform([NSApp contextID],
+ (CGSWindowID)[_window windowNumber],
+ transform );
+ }