diff options
Diffstat (limited to 'tikzit-old/src/osx/CALayer+DrawLabel.m')
-rw-r--r-- | tikzit-old/src/osx/CALayer+DrawLabel.m | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/tikzit-old/src/osx/CALayer+DrawLabel.m b/tikzit-old/src/osx/CALayer+DrawLabel.m new file mode 100644 index 0000000..4860a3c --- /dev/null +++ b/tikzit-old/src/osx/CALayer+DrawLabel.m @@ -0,0 +1,84 @@ +// +// CALayer+DrawLabel.m +// TikZiT +// +// Created by Aleks Kissinger on 09/05/2011. +// Copyright 2011 Aleks Kissinger. All rights reserved. +// + +#import "CALayer+DrawLabel.h" +#import "Transformer.h" + +@implementation CALayer(DrawLabel) + +- (void)drawLabel:(NSString*)label + atPoint:(NSPoint)pt + inContext:(CGContextRef)context + usingTrans:(Transformer*)t { + + CGContextSaveGState(context); + + if ([label length] > 15) { + label = [[label substringToIndex:12] stringByAppendingString:@"..."]; + } + + float fontSize = [t scaleToScreen:0.18f]; // size 9 @ 100% + if (fontSize > 18.0f) fontSize = 18.0f; + + // Prepare font + CTFontRef font = CTFontCreateWithName(CFSTR("Monaco"), fontSize, NULL); + + // Create an attributed string + CFStringRef keys[] = { kCTFontAttributeName }; + CFTypeRef values[] = { font }; + CFDictionaryRef attr = CFDictionaryCreate(NULL, + (const void **)&keys, + (const void **)&values, + sizeof(keys) / sizeof(keys[0]), + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks); + CFAttributedStringRef attrString = + CFAttributedStringCreate(NULL, (CFStringRef)label, attr); + CFRelease(attr); + + // Draw the string + CTLineRef line = CTLineCreateWithAttributedString(attrString); + CGContextSetTextMatrix(context, CGAffineTransformIdentity); + CGContextSetTextPosition(context, 0, 0); + + CGRect labelBounds = CGRectIntegral(CTLineGetImageBounds(line, context)); + //int shiftx = round(labelBounds.size.width / 2); + + CGContextSetTextPosition(context, + round(pt.x - (labelBounds.size.width/2)), + round(pt.y - (0.9*labelBounds.size.height/2))); + + labelBounds = CGRectIntegral(CTLineGetImageBounds(line, context)); + labelBounds.origin.x -= 2; + labelBounds.origin.y -= 2; + labelBounds.size.width += 4; + labelBounds.size.height += 4; + + CGContextSetShouldAntialias(context, NO); + + CGContextSetRGBFillColor(context, 1.0f, 1.0f, 0.5f, 0.7f); + CGContextSetRGBStrokeColor(context, 0.5f, 0.0f, 0.0f, 0.7f); + + CGContextFillRect(context, labelBounds); + CGContextStrokeRect(context, labelBounds); + + CGContextSetShouldAntialias(context, YES); + + CGContextSetRGBFillColor(context, 0.3f, 0.3f, 0.3f, 0.7f); + + CTLineDraw(line, context); + + // Clean up + CFRelease(line); + CFRelease(attrString); + CFRelease(font); + + CGContextRestoreGState(context); +} + +@end |