Advanced Search

Drawing Scaled Rectangles with NSDrawNinePartImage

/ Published in: Objective C
Save to your folder(s)
Drawing scaled rectangles of arbitrary width and height that keeps the corner and sides properly scaled while growing the center.

Expand | Embed | Plain Text

Copy this code and paste it in your HTML 
  1. static NSImage *topLeftCornerImage;
  2. static NSImage *topEdgeImage;
  3. static NSImage *topRightCornerImage;
  4. static NSImage *leftEdgeImage;
  5. static NSImage *centerImage;
  6. static NSImage *rightEdgeImage;
  7. static NSImage *bottomLeftCornerImage;
  8. static NSImage *bottomEdgeImage;
  9. static NSImage *bottomRightCornerImage;
  10.  
  11. + (void)initialize;
  12. {
  13.   if (baseImage) return;
  14.  
  15.   NSRect tileRect = NSMakeRect(0,0,8,8);
  16.  
  17.   baseImage = [NSImage imageNamed:@"SoundPickerBackground"];
  18.  
  19.   topLeftCornerImage = [[NSImage alloc] initWithSize:tileRect.size];
  20.   [topLeftCornerImage lockFocus];
  21.   [baseImage drawInRect:tileRect
  22.                fromRect:NSMakeRect(0.0,16.0,8.0,8.0)
  23.               operation:NSCompositeCopy fraction:1.0];
  24.   [topLeftCornerImage unlockFocus];
  25.  
  26.   topEdgeImage = [[NSImage alloc] initWithSize:tileRect.size];
  27.   [topEdgeImage lockFocus];
  28.   [baseImage drawInRect:tileRect
  29.                fromRect:NSMakeRect(8.0,16.0,8.0,8.0)
  30.               operation:NSCompositeCopy fraction:1.0];
  31.   [topEdgeImage unlockFocus];
  32.  
  33.   topRightCornerImage = [[NSImage alloc] initWithSize:tileRect.size];
  34.   [topRightCornerImage lockFocus];
  35.   [baseImage drawInRect:tileRect
  36.                fromRect:NSMakeRect(16.0,16.0,8.0,8.0)
  37.               operation:NSCompositeCopy fraction:1.0];
  38.   [topRightCornerImage unlockFocus];
  39.  
  40.   leftEdgeImage = [[NSImage alloc] initWithSize:tileRect.size];
  41.   [leftEdgeImage lockFocus];
  42.   [baseImage drawInRect:tileRect
  43.                fromRect:NSMakeRect(0,8.0,8.0,8.0)
  44.               operation:NSCompositeCopy fraction:1.0];
  45.   [leftEdgeImage unlockFocus];
  46.  
  47.   centerImage = [[NSImage alloc] initWithSize:tileRect.size];
  48.   [centerImage lockFocus];
  49.   [baseImage drawInRect:tileRect
  50.                fromRect:NSMakeRect(8.0,8.0,8.0,8.0)
  51.               operation:NSCompositeCopy fraction:1.0];
  52.   [centerImage unlockFocus];
  53.  
  54.   rightEdgeImage = [[NSImage alloc] initWithSize:tileRect.size];
  55.   [rightEdgeImage lockFocus];
  56.   [baseImage drawInRect:tileRect
  57.                fromRect:NSMakeRect(16.0,8.0,8.0,8.0)
  58.               operation:NSCompositeCopy fraction:1.0];
  59.   [rightEdgeImage unlockFocus];
  60.  
  61.   bottomLeftCornerImage = [[NSImage alloc] initWithSize:tileRect.size];
  62.   [bottomLeftCornerImage lockFocus];
  63.   [baseImage drawInRect:tileRect
  64.                fromRect:NSMakeRect(0,0,8.0,8.0)
  65.               operation:NSCompositeCopy fraction:1.0];
  66.   [bottomLeftCornerImage unlockFocus];
  67.  
  68.   bottomEdgeImage = [[NSImage alloc] initWithSize:tileRect.size];
  69.   [bottomEdgeImage lockFocus];
  70.   [baseImage drawInRect:tileRect
  71.                fromRect:NSMakeRect(8.0,0,8.0,8.0)
  72.               operation:NSCompositeCopy fraction:1.0];
  73.   [bottomEdgeImage unlockFocus];
  74.  
  75.   bottomRightCornerImage = [[NSImage alloc] initWithSize:tileRect.size];
  76.   [bottomRightCornerImage lockFocus];
  77.   [baseImage drawInRect:tileRect
  78.                fromRect:NSMakeRect(16.0,0,8.0,8.0)
  79.               operation:NSCompositeCopy fraction:1.0];
  80.   [bottomRightCornerImage unlockFocus];
  81. }
  82.  
  83.  
  84.  
  85. - (void)drawRect:(NSRect)rect;
  86. {
  87.   NSDrawNinePartImage([self bounds],
  88.                       topLeftCornerImage, topEdgeImage, topRightCornerImage,
  89.                       leftEdgeImage, centerImage, rightEdgeImage,
  90.                       bottomLeftCornerImage, bottomEdgeImage, bottomRightCornerImage,
  91.                       NSCompositeSourceOver, 1.0, NO);
  92. }

URL: http://www.karlkraft.com/index.php/2007/11/14/nsdrawninepartimage/

Report this snippet


Comments

RSS Icon Subscribe to comments

You need to login to post a comment.