ITChasingArrowsView.m

   1 //
   2 //  ITChasingArrowsView.m
   3 //
   4 //
   5 //  Created by Doug Brown on Sat May 11 2002.
   6 //  Copyright (c) 2002 iThink Software. All rights reserved.
   7 //
   8
   9 #import "ITChasingArrowsView.h"
  10
  11
  12 @implementation ITChasingArrowsView
  13
  14 - (id)initWithCoder:(NSCoder *)decoder
  15 {
  16     self = [super initWithCoder:decoder];
  17
  18     running = NO;
  19
  20     images = [[decoder decodeObject] retain];
  21
  22     curIndex = 0;
  23     timer = nil;
  24
  25     return self;
  26 }
  27
  28 - (void)encodeWithCoder:(NSCoder *)coder
  29 {
  30     [super encodeWithCoder:coder];
  31
  32     [coder encodeObject:images];
  33 }
  34
  35 - (id)initWithFrame:(NSRect)frame {
  36     self = [super initWithFrame:frame];
  37     if (self) {
  38         NSBundle *bund = [NSBundle bundleForClass:[self class]];
  39         running = NO;
  40         images = [[NSArray alloc] initWithObjects:
  41             [[[NSImage alloc] initWithContentsOfFile:[bund pathForImageResource:@"ITChasingArrow1.tiff"]] autorelease],
  42             [[[NSImage alloc] initWithContentsOfFile:[bund pathForImageResource:@"ITChasingArrow2.tiff"]] autorelease],
  43             [[[NSImage alloc] initWithContentsOfFile:[bund pathForImageResource:@"ITChasingArrow3.tiff"]] autorelease],
  44             [[[NSImage alloc] initWithContentsOfFile:[bund pathForImageResource:@"ITChasingArrow4.tiff"]] autorelease],
  45             [[[NSImage alloc] initWithContentsOfFile:[bund pathForImageResource:@"ITChasingArrow5.tiff"]] autorelease],
  46             [[[NSImage alloc] initWithContentsOfFile:[bund pathForImageResource:@"ITChasingArrow6.tiff"]] autorelease],
  47             [[[NSImage alloc] initWithContentsOfFile:[bund pathForImageResource:@"ITChasingArrow7.tiff"]] autorelease],
  48             [[[NSImage alloc] initWithContentsOfFile:[bund pathForImageResource:@"ITChasingArrow8.tiff"]] autorelease],
  49             [[[NSImage alloc] initWithContentsOfFile:[bund pathForImageResource:@"ITChasingArrow9.tiff"]] autorelease],
  50             [[[NSImage alloc] initWithContentsOfFile:[bund pathForImageResource:@"ITChasingArrow10.tiff"]] autorelease],
  51             nil];
  52
  53         curIndex = 0;
  54         timer = nil;
  55     }
  56     return self;
  57 }
  58
  59 - (void)dealloc
  60 {
  61     if (timer)
  62     {
  63         [timer invalidate];
  64         [timer release];
  65         timer = nil;
  66     }
  67     [images release];
  68
  69     [super dealloc];
  70 }
  71 - (void)drawRect:(NSRect)rect {
  72
  73     if (running)
  74     {
  75         NSImage *curImage = [images objectAtIndex:curIndex];
  76         float amt;
  77         if (inForeground)
  78         {
  79             amt = 1.0;
  80         }
  81         else
  82         {
  83             amt = 0.5;
  84         }
  85         [curImage compositeToPoint:NSMakePoint(0,0) operation:NSCompositeSourceOver fraction:amt];
  86     }
  87     else
  88     {
  89         // draw nothing.
  90     }
  91 }
  92
  93 - (IBAction)stop:(id)sender
  94 {
  95     running = NO;
  96
  97     if (timer)
  98     {
  99         NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
 100         [nc removeObserver:self];
 101         [timer invalidate];
 102         [timer release];
 103         timer = nil;
 104     }
 105
 106     [self setNeedsDisplay:YES];
 107 }
 108
 109 - (IBAction)start:(id)sender
 110 {
 111     if (!timer)
 112     {
 113         NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
 114         [nc addObserver:self selector:@selector(appWentToBackground:) name:NSApplicationWillResignActiveNotification object:nil];
 115         [nc addObserver:self selector:@selector(appWentToForeground:) name:NSApplicationWillBecomeActiveNotification object:nil];
 116         [nc addObserver:self selector:@selector(windowWentToBackground:) name:NSWindowDidResignMainNotification object:nil];
 117         [nc addObserver:self selector:@selector(windowWentToForeground:) name:NSWindowDidBecomeMainNotification object:nil];
 118         inForeground = ([NSApp isActive] && [[self window] isMainWindow]);
 119         curIndex = 0;
 120         running = YES;
 121         timer = [[NSTimer scheduledTimerWithTimeInterval:0.05
 122                                                   target:self
 123                                                 selector:@selector(showNewImage:)
 124                                                 userInfo:nil
 125                                                  repeats:YES] retain];
 126         [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSEventTrackingRunLoopMode];
 127     }
 128 }
 129
 130 - (void)showNewImage:(NSTimer *)t
 131 {
 132     [self setNeedsDisplay:YES];
 133
 134     if (curIndex == 9)
 135     {
 136         curIndex = 0;
 137     }
 138     else
 139     {
 140         curIndex++;
 141     }
 142 }
 143
 144 - (void)appWentToBackground:(NSNotification *)note
 145 {
 146     inForeground = NO;
 147 }
 148
 149 - (void)appWentToForeground:(NSNotification *)note
 150 {
 151     inForeground = YES;
 152 }
 153
 154 - (void)windowWentToBackground:(NSNotification *)note
 155 {
 156     NSWindow *window = [note object];
 157     if (window == [self window])
 158     {
 159         inForeground = NO;
 160     }
 161 }
 162
 163 - (void)windowWentToForeground:(NSNotification *)note
 164 {
 165     NSWindow *window = [note object];
 166     if (window == [self window])
 167     {
 168         inForeground = YES;
 169     }
 170 }
 171
 172 @end