Source/AIHoveringPopUpButtonCell.m

   1 //
   2 //  AIHoveringPopUpButtonCell.m
   3 //  Adium
   4 //
   5 //  Created by Evan Schoenberg on 12/16/05.
   6 //
   7
   8 #import "AIHoveringPopUpButtonCell.h"
   9 #import <AIUtilities/AIParagraphStyleAdditions.h>
  10 #import <AIUtilities/AIBezierPathAdditions.h>
  11 #import <AIUtilities/AIColorAdditions.h>
  12 #import <AIUtilities/AIImageAdditions.h>
  13
  14 #include <Carbon/Carbon.h>
  15
  16 #define LEFT_MARGIN             5
  17 #define IMAGE_MARGIN    4
  18 #define ARROW_WIDTH             8
  19 #define ARROW_HEIGHT    (ARROW_WIDTH/2.0)
  20 #define ARROW_XOFFSET   5
  21 #define RIGHT_MARGIN    5
  22
  23 @implementation AIHoveringPopUpButtonCell
  24
  25 - (void)commonInit
  26 {
  27         title = nil;
  28         currentImage = nil;
  29         textSize = NSZeroSize;
  30         imageSize = NSZeroSize;
  31         hovered = NO;
  32         hoveredFraction = 0.0;
  33
  34         statusParagraphStyle = [[NSMutableParagraphStyle styleWithAlignment:NSLeftTextAlignment
  35                                                                                                                   lineBreakMode:NSLineBreakByTruncatingTail] retain];
  36
  37         statusAttributes = [[NSMutableDictionary dictionaryWithObjectsAndKeys:
  38                 statusParagraphStyle, NSParagraphStyleAttributeName,
  39                 [NSFont systemFontOfSize:10], NSFontAttributeName,
  40                 nil] retain];
  41 }
  42
  43 - (id)initTextCell:(NSString *)str
  44 {
  45         if ((self = [super initTextCell:str])) {
  46                 [self commonInit];
  47         }
  48
  49         return self;
  50 }
  51 - (id)initImageCell:(NSImage *)image
  52 {
  53         if ((self = [super initImageCell:image])) {
  54                 [self commonInit];
  55         }
  56
  57         return self;
  58 }
  59
  60 - (id)copyWithZone:(NSZone *)zone
  61 {
  62         AIHoveringPopUpButtonCell       *newCell = [[self class] allocWithZone:zone];
  63
  64         switch ([self type]) {
  65                 case NSImageCellType:
  66                         newCell = [newCell initImageCell:[self image]];
  67                         break;
  68                 case NSTextCellType:
  69                         newCell = [newCell initTextCell:[self stringValue]];
  70                         break;
  71                 default:
  72                         newCell = [newCell init]; //and hope for the best
  73                         break;
  74         }
  75
  76         [newCell setMenu:[[[self menu] copy] autorelease]];
  77         [newCell->title retain];
  78         [newCell->currentImage retain];
  79         [newCell->statusParagraphStyle retain];
  80         [newCell->statusAttributes retain];
  81
  82         return newCell;
  83 }
  84
  85 - (void)dealloc
  86 {
  87         /* Super's implementation calls setImage:nil in 10.4; we shouldn't depend on this implementation detail but should
  88          * set our ivars to nil to ensure we don't double-release.
  89          */
  90         [title release]; title = nil;
  91         [currentImage release]; currentImage = nil;
  92
  93         [statusParagraphStyle release];
  94         [statusAttributes release];
  95
  96         [super dealloc];
  97 }
  98
  99 - (void)setTitle:(NSString *)inTitleString
 100 {
 101         [title release];
 102
 103         //Strip out all newlines
 104         inTitleString = [inTitleString stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"\n\r"]];
 105
 106         if (inTitleString && [inTitleString length]) {
 107                 title = [[NSMutableAttributedString alloc] initWithString:inTitleString
 108                                                                                                            attributes:statusAttributes];
 109                 textSize = [title size];
 110         } else {
 111                 title = nil;
 112                 textSize = NSZeroSize;
 113         }
 114 }
 115
 116 - (void)setFont:(NSFont *)inFont
 117 {
 118         NSString *oldTitleString = [[title string] copy];
 119
 120         [statusAttributes setObject:inFont
 121                                                  forKey:NSFontAttributeName];
 122         [self setTitle:oldTitleString];
 123         [oldTitleString release];
 124
 125         [super setFont:inFont];
 126 }
 127
 128 -(void)setImage:(NSImage *)inImage
 129 {
 130         if (inImage != currentImage) {
 131                 [currentImage release];
 132                 currentImage = [inImage retain];
 133
 134                 imageSize = [currentImage size];
 135         }
 136 }
 137
 138 - (void)fadeHovered:(NSControl *)currentControlView
 139 {
 140         if (hovered) {
 141                 if (hoveredFraction < 1.0) hoveredFraction += 0.05;
 142         } else {
 143                 if (hoveredFraction > 0.0) hoveredFraction -= 0.05;
 144         }
 145
 146         [currentControlView setNeedsDisplay:YES];
 147
 148         if ((hoveredFraction > 0.0) &&
 149                 (hoveredFraction < 1.0)) {
 150                 [currentControlView retain];
 151                 [NSObject cancelPreviousPerformRequestsWithTarget:self
 152                                                                                                  selector:@selector(fadeHovered:)
 153                                                                                                    object:currentControlView];
 154
 155                 [self performSelector:@selector(fadeHovered:)
 156                                    withObject:currentControlView
 157                                    afterDelay:0];
 158                 [currentControlView release];
 159         }
 160 }
 161
 162 - (void)setHovered:(BOOL)inHovered animate:(BOOL)animate
 163 {
 164         if (animate && (hovered != inHovered)) {
 165                 hovered = inHovered;
 166
 167                 hoveredFraction = (hovered ? 0.80 : 0.20);
 168
 169                 [NSObject cancelPreviousPerformRequestsWithTarget:self
 170                                                                                                  selector:@selector(fadeHovered:)
 171                                                                                                    object:[self controlView]];
 172                 [self performSelector:@selector(fadeHovered:)
 173                                    withObject:[self controlView]
 174                                    afterDelay:0];
 175         } else {
 176                 hovered = inHovered;
 177
 178                 hoveredFraction = (hovered ? 1.0 : 0.0);
 179                 [[self controlView] setNeedsDisplay:YES];
 180         }
 181 }
 182
 183 - (BOOL)hovered
 184 {
 185         return hovered;
 186 }
 187
 188 #pragma mark Drawing
 189
 190 //for some unknown reason, NSButtonCell's -drawWithFrame:inView: draws a basic ridge border on the bottom-right if we do not override it.
 191 - (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView
 192 {
 193         [self drawInteriorWithFrame:cellFrame inView:controlView];
 194 }
 195
 196 - (float)trackingWidth
 197 {
 198         float trackingWidth;
 199
 200         trackingWidth = LEFT_MARGIN + [title size].width + RIGHT_MARGIN;
 201         if ([self menu]) {
 202                 trackingWidth += ARROW_XOFFSET + ARROW_WIDTH;
 203         }
 204         if (currentImage) {
 205                 trackingWidth += imageSize.width + IMAGE_MARGIN;
 206         }
 207
 208         return trackingWidth;
 209 }
 210
 211 - (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView
 212 {
 213         NSRect  textRect;
 214         NSColor *drawingColor;
 215         NSMenu  *myMenu = [self menu];
 216         float   maxTextWidth;
 217
 218         [statusParagraphStyle setMaximumLineHeight:cellFrame.size.height];
 219
 220         textRect = NSMakeRect(cellFrame.origin.x + LEFT_MARGIN,
 221                                                   cellFrame.origin.y + ((cellFrame.size.height - textSize.height) / 2),
 222                                                   textSize.width,
 223                                                   textSize.height);
 224         maxTextWidth = (cellFrame.size.width - LEFT_MARGIN - RIGHT_MARGIN);
 225
 226         if (currentImage) {
 227                 textRect.origin.x += (imageSize.width + IMAGE_MARGIN);
 228                 maxTextWidth -= (imageSize.width + IMAGE_MARGIN);
 229         }
 230
 231         if (myMenu) {
 232                 maxTextWidth -= (ARROW_XOFFSET + ARROW_WIDTH);
 233         }
 234
 235         if (textRect.size.width > maxTextWidth) {
 236                 textRect.size.width = maxTextWidth;
 237         }
 238
 239         if (hovered || (hoveredFraction > 0.0)) {
 240                 //Draw our hovered / highlighted background first
 241                 NSBezierPath    *path;
 242
 243                 float backgroundWidth = LEFT_MARGIN + textRect.size.width + RIGHT_MARGIN;
 244
 245                 if (myMenu) {
 246                         backgroundWidth += (ARROW_XOFFSET + ARROW_WIDTH);
 247                 }
 248                 if (currentImage) {
 249                         backgroundWidth += imageSize.width + IMAGE_MARGIN;
 250                 }
 251
 252                 path = [NSBezierPath bezierPathWithRoundedRect:NSMakeRect(cellFrame.origin.x,
 253                                                                                                                                   cellFrame.origin.y,
 254                                                                                                                                   backgroundWidth,
 255                                                                                                                                   cellFrame.size.height)
 256                                                                                                 radius:10];
 257
 258                 if ([self isHighlighted]) {
 259                         [[[NSColor darkGrayColor] colorWithAlphaComponent:hoveredFraction] set];
 260
 261                 } else {
 262                         [[[NSColor grayColor]  colorWithAlphaComponent:hoveredFraction] set];
 263                 }
 264
 265                 [path fill];
 266
 267                 if (hovered) {
 268                         drawingColor = [NSColor whiteColor];
 269                 } else {
 270                         drawingColor = [NSColor blackColor];
 271                 }
 272         } else {
 273                 drawingColor = [NSColor blackColor];
 274         }
 275
 276         if (currentImage) {
 277                 [currentImage drawInRect:NSMakeRect(cellFrame.origin.x + LEFT_MARGIN,
 278                                                                                         cellFrame.origin.y,
 279                                                                                         imageSize.width + IMAGE_MARGIN,
 280                                                                                         cellFrame.size.height)
 281                                                   atSize:imageSize
 282                                                 position:IMAGE_POSITION_LEFT
 283                                                 fraction:1.0];
 284         }
 285
 286         [statusAttributes setObject:drawingColor
 287                                                  forKey:NSForegroundColorAttributeName];
 288         [title setAttributes:statusAttributes
 289                                    range:NSMakeRange(0, [title length])];
 290         [title drawInRect:textRect];
 291
 292         //Draw the arrow
 293         if (myMenu) {
 294                 NSBezierPath *arrowPath = [NSBezierPath bezierPath];
 295
 296                 [arrowPath moveToPoint:NSMakePoint(NSMaxX(textRect) + ARROW_XOFFSET,
 297                                                                                    (NSMaxY(cellFrame) / 2) - (ARROW_HEIGHT / 2))];
 298                 [arrowPath relativeLineToPoint:NSMakePoint(ARROW_WIDTH, 0)];
 299                 [arrowPath relativeLineToPoint:NSMakePoint(-(ARROW_WIDTH/2), (ARROW_HEIGHT))];
 300
 301                 [drawingColor set];
 302                 [arrowPath fill];
 303         }
 304 }
 305
 306 - (BOOL)isOpaque
 307 {
 308     return NO;
 309 }
 310
 311 @end