ITPivotWindowEffect.m

   1 #import "ITPivotWindowEffect.h"
   2 #import "ITCoreGraphicsHacks.h"
   3
   4 @interface ITPivotWindowEffect (Private)
   5 - (void)setPivot:(float)angle;
   6 - (void)pivotFinish;
   7 @end
   8
   9 @implementation ITPivotWindowEffect
  10
  11
  12 - (void)performAppear
  13 {
  14     [self setPivot:315.0];
  15     _effectProgress = 0.0;
  16     [_window setAlphaValue:0.0];
  17     [_window orderFront:self];
  18     _effectTimer = [NSTimer scheduledTimerWithTimeInterval:(1.0 / EFFECT_FPS)
  19                                                     target:self
  20                                                   selector:@selector(appearStep)
  21                                                   userInfo:nil
  22                                                    repeats:YES];
  23 }
  24
  25 - (void)performVanish
  26 {
  27     [self setPivot:0.0];
  28     _effectProgress = 1.0;
  29     [_window setAlphaValue:1.0];
  30     [_window orderFront:self];
  31     _effectTimer = [NSTimer scheduledTimerWithTimeInterval:(1.0 / EFFECT_FPS)
  32                                                     target:self
  33                                                   selector:@selector(vanishStep)
  34                                                   userInfo:nil
  35                                                    repeats:YES];
  36 }
  37
  38 - (void)cancelAppear
  39 {
  40     [self pivotFinish];
  41     [_window orderOut:self];
  42     [self setPivot:0.0];
  43     [_window setAlphaValue:1.0];
  44 }
  45
  46 - (void)cancelVanish
  47 {
  48     [self pivotFinish];
  49     [self setPivot:0.0];
  50     [_window setAlphaValue:1.0];
  51     [_window orderFront:self];
  52     [_window display];
  53 }
  54
  55 - (void)appearStep
  56 {
  57     float interPivot = 0.0;
  58     _effectProgress += (1.0 / (EFFECT_FPS * _effectTime));
  59     _effectProgress = (_effectProgress < 1.0 ? _effectProgress : 1.0);
  60     interPivot = (( sin((_effectProgress * pi) - (pi / 2)) + 1 ) / 2);
  61     [self setPivot:((interPivot * 45) + 315)];
  62     [_window setAlphaValue:interPivot];
  63
  64     if ( _effectProgress >= 1.0 ) {
  65         [self pivotFinish];
  66     }
  67 }
  68
  69 - (void)vanishStep
  70 {
  71     float interPivot = 1.0;
  72     _effectProgress -= (1.0 / (EFFECT_FPS * _effectTime));
  73     _effectProgress = (_effectProgress > 0.0 ? _effectProgress : 0.0);
  74     interPivot = (( sin((_effectProgress * pi) - (pi / 2)) + 1 ) / 2);
  75     [self setPivot:((interPivot * 45) + 315)];
  76     [_window setAlphaValue:interPivot];
  77
  78     if ( _effectProgress <= 0.0 ) {
  79         [self pivotFinish];
  80     }
  81 }
  82
  83 - (void)pivotFinish
  84 {
  85     [_effectTimer invalidate];
  86     _effectTimer = nil;
  87 }
  88
  89
  90 - (void)setPivot:(float)angle
  91 {
  92     float degAngle = (angle * (pi / 180));
  93     CGAffineTransform transform = CGAffineTransformMakeRotation(degAngle);
  94
  95  // Set pivot rotation point
  96     transform.tx = -32.0;
  97     transform.ty = [_window frame].size.height + 32.0;
  98
  99     CGSSetWindowTransform([NSApp contextID],
 100                           (CGSWindowID)[_window windowNumber],
 101                           CGAffineTransformTranslate(transform,
 102                                                      (([_window frame].origin.x - 32.0) * -1),
 103                                                      (([[_window screen] frame].size.height - ([_window frame].origin.y) + 32.0) * -1) ));
 104 }
 105
 106
 107 @end