Starter CPGradient with drawInRect:angle:.

AppKit/AppKit.j

@@ -56,6 +56,7 @@
 @import "CPFont.j"
 @import "CPFontManager.j"
 @import "CPGeometry.j"
+@import "CPGradient.j"
 @import "CPGraphics.j"
 @import "CPImage.j"
 @import "CPImageView.j"

AppKit/CPGradient.j

@@ -0,0 +1,61 @@
+/*
+ * CPGradient.j
+ * AppKit
+ *
+ * Created by Alexander Ljungberg.
+ * Copyright 2012, SlevenBits Ltd.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/*!
+    A class for drawing linear and radial gradients with a convenient API.
+*/
+@implementation CPGradient : CPObject
+{
+    CGGradient _gradient;
+}
+
+- (id)initWithColors:(CPArray)someColors atLocations:(CPArray)someLocations colorSpace:(CPColorSpace)aColorSpace
+{
+    if (self = [super init])
+    {
+        var cgColors = [],
+            count = [someColors count],
+            colorspace = CGColorSpaceCreateDeviceRGB;
+        while (count--)
+            cgColors.push(CGColorCreate(colorspace, [someColors[count] components]));
+        _gradient = CGGradientCreateWithColors(aColorSpace, cgColors, someLocations);
+    }
+
+    return self;
+}
+
+- (void)drawInRect:(CGRect)rect angle:(float)angle
+{
+    if (angle !== 0)
+        [CPException raise:CPInvalidArgumentException reason:@"angle != 0 not yet implemented"];
+
+    var ctx = [[CPGraphicsContext currentContext] graphicsPort];
+
+    CGContextSaveGState(ctx);
+    CGContextAddRect(ctx, rect);
+    CGContextDrawLinearGradient(ctx, _gradient, rect.origin, CGPointMake(CGRectGetMaxX(rect), CGRectGetMaxY(rect)), 0);
+    CGContextRestoreGState(ctx);
+
+    //[self drawFromPoint:rect.origin toPoint:CGPointMake(CGRectGetMaxX(rect), CGRectGetMaxY(rect)) options:0];
+}
+
+@end