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

   1
   2 // **********************************************************************
   3 // The Cheat - A universal game cheater for Mac OS X
   4 // (C) 2003-2005 Chaz McGarvey (BrokenZipper)
   5 //
   6 // This program is free software; you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation; either version 1, or (at your option)
   9 // any later version.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software
  18 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 //
  20
  21
  22 #import "FadeView.h"
  23
  24
  25 @interface FadeView ( PrivateAPI )
  26
  27 - (void)_fadeTimer:(NSTimer *)timer;
  28
  29 @end
  30
  31
  32 @implementation FadeView
  33
  34
  35 - (id)init
  36 {
  37         if ( self = [super init] ) {
  38                 [self setFadeDuration:1.0];
  39                 [self setFadeInterval:5.0/60.0];
  40         }
  41         return self;
  42 }
  43
  44 - (id)initWithFrame:(NSRect)frame
  45 {
  46         if ( self = [super initWithFrame:frame] ) {
  47                 [self setFadeDuration:1.0];
  48                 [self setFadeInterval:5.0/60.0];
  49         }
  50         return self;
  51 }
  52
  53 - (void)dealloc
  54 {
  55         [self stopFadeAnimation];
  56         [_fadeImage release];
  57         [super dealloc];
  58 }
  59
  60
  61 - (void)drawRect:(NSRect)rect
  62 {
  63     [_fadeImage dissolveToPoint:NSMakePoint(0,0) fraction:_fadeAlpha];
  64 }
  65
  66
  67 - (NSImage *)image
  68 {
  69         return _fadeImage;
  70 }
  71
  72 - (NSTimeInterval)fadeDuration
  73 {
  74         return _fadeDuration;
  75 }
  76
  77 - (NSTimeInterval)fadeInterval
  78 {
  79         return _fadeInterval;
  80 }
  81
  82 - (double)alpha
  83 {
  84         return _fadeAlpha;
  85 }
  86
  87
  88 - (void)setImage:(NSImage *)image
  89 {
  90         [image retain];
  91         [_fadeImage release];
  92         _fadeImage = image;
  93 }
  94
  95 - (void)setFadeDuration:(NSTimeInterval)seconds
  96 {
  97         if ( seconds != 0.0 ) {
  98                 _fadeDuration = seconds;
  99         }
 100         else {
 101                 _fadeDuration = 1.0;
 102         }
 103 }
 104
 105 - (void)setFadeInterval:(NSTimeInterval)seconds
 106 {
 107         _fadeInterval = seconds;
 108 }
 109
 110 - (void)startFadeAnimation
 111 {
 112         [self stopFadeAnimation];
 113
 114         _fadeAlpha = 1.0;
 115         [self setNeedsDisplay:YES];
 116
 117         _fadeTimer = [[NSTimer scheduledTimerWithTimeInterval:_fadeInterval target:self selector:@selector(_fadeTimer:) userInfo:nil repeats:YES] retain];
 118         [[NSRunLoop currentRunLoop] addTimer:_fadeTimer forMode:NSEventTrackingRunLoopMode];
 119         [[NSRunLoop currentRunLoop] addTimer:_fadeTimer forMode:NSModalPanelRunLoopMode];
 120         [self release];
 121 }
 122
 123 - (void)stopFadeAnimation
 124 {
 125         if ( _fadeTimer ) {
 126                 [self retain];
 127                 [_fadeTimer invalidate];
 128                 [_fadeTimer release];
 129                 _fadeTimer = nil;
 130         }
 131 }
 132
 133 - (void)_fadeTimer:(NSTimer *)timer
 134 {
 135         _fadeAlpha -= [timer timeInterval] / _fadeDuration;
 136         [self setNeedsDisplay:YES];
 137
 138         if ( _fadeAlpha <= 0.0 ) {
 139                 [self stopFadeAnimation];
 140                 if ( [_delegate respondsToSelector:@selector(fadeViewFinishedAnimation:)] ) {
 141                         [_delegate fadeViewFinishedAnimation:self];
 142                 }
 143         }
 144 }
 145
 146
 147 - (id)delegate
 148 {
 149         return _delegate;
 150 }
 151
 152 - (void)setDelegate:(id)delegate
 153 {
 154         _delegate = delegate;
 155 }
 156
 157
 158 @end