initial drop of a few sources to start things out

1 files changed, 58 insertions, 0 deletions

diff --git a/AppKit/GTMNSBezierPath+RoundRect.m b/AppKit/GTMNSBezierPath+RoundRect.m
new file mode 100644
index 0000000..4b98dc9
--- /dev/null
+++ b/AppKit/GTMNSBezierPath+RoundRect.m
@@ -0,0 +1,58 @@
+//
+//  GTMNSBezierPath+RoundRect.h
+//
+//  Category for adding utility functions for creating
+//  round rectangles.
+//
+//  Copyright 2006-2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+// 
+//  http://www.apache.org/licenses/LICENSE-2.0
+// 
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import "GTMNSBezierPath+RoundRect.h"
+
+@implementation NSBezierPath (GTMBezierPathRoundRectAdditions)
+
+
++ (NSBezierPath *)gtm_bezierPathWithRoundRect:(NSRect)rect cornerRadius:(float)radius {
+  NSBezierPath *bezier = [NSBezierPath bezierPath];
+  [bezier gtm_appendBezierPathWithRoundRect:rect cornerRadius:radius];
+  return bezier;
+}
+
+
+- (void)gtm_appendBezierPathWithRoundRect:(NSRect)rect cornerRadius:(float)radius {
+  if (!NSIsEmptyRect(rect)) {
+    if (radius > 0.0) {
+      // Clamp radius to be no larger than half the rect's width or height.
+      radius = MIN(radius, 0.5 * MIN(rect.size.width, rect.size.height));
+      
+      NSPoint topLeft = NSMakePoint(NSMinX(rect), NSMaxY(rect));
+      NSPoint topRight = NSMakePoint(NSMaxX(rect), NSMaxY(rect));
+      NSPoint bottomRight = NSMakePoint(NSMaxX(rect), NSMinY(rect));
+      
+      [self moveToPoint:NSMakePoint(NSMidX(rect), NSMaxY(rect))];
+      [self appendBezierPathWithArcFromPoint:topLeft toPoint:rect.origin radius:radius];
+      [self appendBezierPathWithArcFromPoint:rect.origin toPoint:bottomRight radius:radius];
+      [self appendBezierPathWithArcFromPoint:bottomRight toPoint:topRight radius:radius];
+      [self appendBezierPathWithArcFromPoint:topRight toPoint:topLeft radius:radius];
+      [self closePath];
+    } else {
+      // When radius <= 0.0, use plain rectangle.
+      [self appendBezierPathWithRect:rect];
+    }
+  }
+}
+
+
+@end