Dogcows Code - chaz/thecheat/blob - FadeView.m

   1
   2 /*
   3  * The Cheat - The legendary universal game trainer for Mac OS X.
   4  * http://www.brokenzipper.com/trac/wiki/TheCheat
   5  *
   6  * Copyright (c) 2003-2011, Charles McGarvey et al.
   7  *
   8  * Distributable under the terms and conditions of the 2-clause BSD
   9  * license; see the file COPYING for the legal text of the license.
  10  */
  11
  12
  13 #import "FadeView.h"
  14
  15
  16 @interface FadeView ( PrivateAPI )
  17
  18 - (void)_fadeTimer:(NSTimer *)timer;
  19
  20 @end
  21
  22
  23 @implementation FadeView
  24
  25
  26 - (id)init
  27 {
  28         if ( self = [super init] ) {
  29                 [self setFadeDuration:1.0];
  30                 [self setFadeInterval:5.0/60.0];
  31         }
  32         return self;
  33 }
  34
  35 - (id)initWithFrame:(NSRect)frame
  36 {
  37         if ( self = [super initWithFrame:frame] ) {
  38                 [self setFadeDuration:1.0];
  39                 [self setFadeInterval:5.0/60.0];
  40         }
  41         return self;
  42 }
  43
  44 - (void)dealloc
  45 {
  46         [self stopFadeAnimation];
  47         [_fadeImage release];
  48         [super dealloc];
  49 }
  50
  51
  52 - (void)drawRect:(NSRect)rect
  53 {
  54     [_fadeImage dissolveToPoint:NSMakePoint(0,0) fraction:_fadeAlpha];
  55 }
  56
  57
  58 - (NSImage *)image
  59 {
  60         return _fadeImage;
  61 }
  62
  63 - (NSTimeInterval)fadeDuration
  64 {
  65         return _fadeDuration;
  66 }
  67
  68 - (NSTimeInterval)fadeInterval
  69 {
  70         return _fadeInterval;
  71 }
  72
  73 - (double)alpha
  74 {
  75         return _fadeAlpha;
  76 }
  77
  78
  79 - (void)setImage:(NSImage *)image
  80 {
  81         [image retain];
  82         [_fadeImage release];
  83         _fadeImage = image;
  84 }
  85
  86 - (void)setFadeDuration:(NSTimeInterval)seconds
  87 {
  88         if ( seconds != 0.0 ) {
  89                 _fadeDuration = seconds;
  90         }
  91         else {
  92                 _fadeDuration = 1.0;
  93         }
  94 }
  95
  96 - (void)setFadeInterval:(NSTimeInterval)seconds
  97 {
  98         _fadeInterval = seconds;
  99 }
 100
 101 - (void)startFadeAnimation
 102 {
 103         [self stopFadeAnimation];
 104
 105         _fadeAlpha = 1.0;
 106         [self setNeedsDisplay:YES];
 107
 108         _fadeTimer = [[NSTimer scheduledTimerWithTimeInterval:_fadeInterval target:self selector:@selector(_fadeTimer:) userInfo:nil repeats:YES] retain];
 109         [[NSRunLoop currentRunLoop] addTimer:_fadeTimer forMode:NSEventTrackingRunLoopMode];
 110         [[NSRunLoop currentRunLoop] addTimer:_fadeTimer forMode:NSModalPanelRunLoopMode];
 111         [self release];
 112 }
 113
 114 - (void)stopFadeAnimation
 115 {
 116         if ( _fadeTimer ) {
 117                 [self retain];
 118                 [_fadeTimer invalidate];
 119                 [_fadeTimer release];
 120                 _fadeTimer = nil;
 121         }
 122 }
 123
 124 - (void)_fadeTimer:(NSTimer *)timer
 125 {
 126         _fadeAlpha -= [timer timeInterval] / _fadeDuration;
 127         [self setNeedsDisplay:YES];
 128
 129         if ( _fadeAlpha <= 0.0 ) {
 130                 [self stopFadeAnimation];
 131                 if ( [_delegate respondsToSelector:@selector(fadeViewFinishedAnimation:)] ) {
 132                         [_delegate fadeViewFinishedAnimation:self];
 133                 }
 134         }
 135 }
 136
 137
 138 - (id)delegate
 139 {
 140         return _delegate;
 141 }
 142
 143 - (void)setDelegate:(id)delegate
 144 {
 145         _delegate = delegate;
 146 }
 147
 148
 149 @end