From 1c1c70beb8fcba6bbcb3f6ca58215e646dca7888 Mon Sep 17 00:00:00 2001
From: "gtm.daemon" <gtm.daemon@7dc7ac4e-7543-0410-b95c-c1676fc8e2a3>
Date: Mon, 16 Mar 2009 14:30:25 +0000
Subject: [Author: avi]

Add ability to create rounded rects with different radii for different corners.

R=dmaclach
---
 AppKit/GTMNSBezierPath+RoundRect.m | 85 ++++++++++++++++++++++++++------------
 1 file changed, 59 insertions(+), 26 deletions(-)

(limited to 'AppKit/GTMNSBezierPath+RoundRect.m')

diff --git a/AppKit/GTMNSBezierPath+RoundRect.m b/AppKit/GTMNSBezierPath+RoundRect.m
index d4e5050..806bd94 100644
--- a/AppKit/GTMNSBezierPath+RoundRect.m
+++ b/AppKit/GTMNSBezierPath+RoundRect.m
@@ -31,36 +31,69 @@
   return bezier;
 }
 
++ (NSBezierPath *)gtm_bezierPathWithRoundRect:(NSRect)rect
+                          topLeftCornerRadius:(CGFloat)radiusTL
+                         topRightCornerRadius:(CGFloat)radiusTR
+                       bottomLeftCornerRadius:(CGFloat)radiusBL
+                      bottomRightCornerRadius:(CGFloat)radiusBR {
+  NSBezierPath *bezier = [NSBezierPath bezierPath];
+  [bezier gtm_appendBezierPathWithRoundRect:rect
+                        topLeftCornerRadius:radiusTL
+                       topRightCornerRadius:radiusTR
+                     bottomLeftCornerRadius:radiusBL
+                    bottomRightCornerRadius:radiusBR];
+  return bezier;
+}
 
 - (void)gtm_appendBezierPathWithRoundRect:(NSRect)rect
                              cornerRadius:(CGFloat)radius {
+  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));
+    
+    [self gtm_appendBezierPathWithRoundRect:rect
+                        topLeftCornerRadius:radius
+                       topRightCornerRadius:radius
+                     bottomLeftCornerRadius:radius
+                    bottomRightCornerRadius:radius];
+  } else {
+    // When radius <= 0.0, use plain rectangle.
+    [self appendBezierPathWithRect:rect];
+  }
+}
+
+- (void)gtm_appendBezierPathWithRoundRect:(NSRect)rect
+                      topLeftCornerRadius:(CGFloat)radiusTL
+                     topRightCornerRadius:(CGFloat)radiusTR
+                   bottomLeftCornerRadius:(CGFloat)radiusBL
+                  bottomRightCornerRadius:(CGFloat)radiusBR {
+  // Clamp radii to be at least zero. I'd like to clamp both TL+TR and BL+BR to
+  // be less than the width and TL+BL and TR+BR to be less than the height, but
+  // what to do if they're not? Do we scale them both evenly?
+  radiusTL = MAX(0, radiusTL);
+  radiusTR = MAX(0, radiusTR);
+  radiusBL = MAX(0, radiusBL);
+  radiusBR = MAX(0, radiusBR);
+  
   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];
-    }
+    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:radiusTL];
+    [self appendBezierPathWithArcFromPoint:rect.origin
+                                   toPoint:bottomRight
+                                    radius:radiusBL];
+    [self appendBezierPathWithArcFromPoint:bottomRight
+                                   toPoint:topRight
+                                    radius:radiusBR];
+    [self appendBezierPathWithArcFromPoint:topRight
+                                   toPoint:topLeft
+                                    radius:radiusTR];
+    [self closePath];
   }
 }
 
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