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

   1 //
   2 //  FadeView.m
   3 //  The Cheat
   4 //
   5 //  Created by Chaz McGarvey on 12/6/04.
   6 //  Copyright 2004 Chaz McGarvey. All rights reserved.
   7 //
   8
   9 #import "FadeView.h"
  10
  11
  12 @interface FadeView ( PrivateAPI )
  13
  14 - (void)_fadeTimer:(NSTimer *)timer;
  15
  16 @end
  17
  18
  19 @implementation FadeView
  20
  21
  22 - (id)init
  23 {
  24         if ( self = [super init] ) {
  25                 [self setFadeDuration:1.0];
  26                 [self setFadeInterval:5.0/60.0];
  27         }
  28         return self;
  29 }
  30
  31 - (id)initWithFrame:(NSRect)frame
  32 {
  33         if ( self = [super initWithFrame:frame] ) {
  34                 [self setFadeDuration:1.0];
  35                 [self setFadeInterval:5.0/60.0];
  36         }
  37         return self;
  38 }
  39
  40 - (void)dealloc
  41 {
  42         [self stopFadeAnimation];
  43         [_fadeImage release];
  44         [super dealloc];
  45 }
  46
  47
  48 - (void)drawRect:(NSRect)rect
  49 {
  50     [_fadeImage dissolveToPoint:NSMakePoint(0,0) fraction:_fadeAlpha];
  51 }
  52
  53
  54 - (NSImage *)image
  55 {
  56         return _fadeImage;
  57 }
  58
  59 - (NSTimeInterval)fadeDuration
  60 {
  61         return _fadeDuration;
  62 }
  63
  64 - (NSTimeInterval)fadeInterval
  65 {
  66         return _fadeInterval;
  67 }
  68
  69 - (double)alpha
  70 {
  71         return _fadeAlpha;
  72 }
  73
  74
  75 - (void)setImage:(NSImage *)image
  76 {
  77         [image retain];
  78         [_fadeImage release];
  79         _fadeImage = image;
  80 }
  81
  82 - (void)setFadeDuration:(NSTimeInterval)seconds
  83 {
  84         if ( seconds != 0.0 ) {
  85                 _fadeDuration = seconds;
  86         }
  87         else {
  88                 _fadeDuration = 1.0;
  89         }
  90 }
  91
  92 - (void)setFadeInterval:(NSTimeInterval)seconds
  93 {
  94         _fadeInterval = seconds;
  95 }
  96
  97 - (void)startFadeAnimation
  98 {
  99         [self stopFadeAnimation];
 100
 101         _fadeAlpha = 1.0;
 102         [self setNeedsDisplay:YES];
 103
 104         _fadeTimer = [[NSTimer scheduledTimerWithTimeInterval:_fadeInterval target:self selector:@selector(_fadeTimer:) userInfo:nil repeats:YES] retain];
 105         [[NSRunLoop currentRunLoop] addTimer:_fadeTimer forMode:NSEventTrackingRunLoopMode];
 106         [[NSRunLoop currentRunLoop] addTimer:_fadeTimer forMode:NSModalPanelRunLoopMode];
 107         [self release];
 108 }
 109
 110 - (void)stopFadeAnimation
 111 {
 112         if ( _fadeTimer ) {
 113                 [self retain];
 114                 [_fadeTimer invalidate];
 115                 [_fadeTimer release];
 116                 _fadeTimer = nil;
 117         }
 118 }
 119
 120 - (void)_fadeTimer:(NSTimer *)timer
 121 {
 122         _fadeAlpha -= [timer timeInterval] / _fadeDuration;
 123         [self setNeedsDisplay:YES];
 124
 125         if ( _fadeAlpha <= 0.0 ) {
 126                 [self stopFadeAnimation];
 127                 if ( [_delegate respondsToSelector:@selector(fadeViewFinishedAnimation:)] ) {
 128                         [_delegate fadeViewFinishedAnimation:self];
 129                 }
 130         }
 131 }
 132
 133
 134 - (id)delegate
 135 {
 136         return _delegate;
 137 }
 138
 139 - (void)setDelegate:(id)delegate
 140 {
 141         _delegate = delegate;
 142 }
 143
 144
 145 @end