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66 lines
3.1 KiB
Objective-C
Executable file
66 lines
3.1 KiB
Objective-C
Executable file
//
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// REComposeBackgroundView.m
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// REComposeViewController
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//
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// Copyright (c) 2011 Double Encore, Inc. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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// Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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// Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the distribution. Neither the name of the Double Encore Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
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// BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#import "REComposeBackgroundView.h"
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@implementation REComposeBackgroundView
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- (id)initWithFrame:(CGRect)frame
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{
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self = [super initWithFrame:frame];
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if (self) {
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self.opaque = NO;
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self.contentMode = UIViewContentModeRedraw;
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}
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return self;
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}
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- (void)drawRect:(CGRect)rect
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{
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CGPoint center = CGPointMake(CGRectGetMidX(self.bounds), CGRectGetMidY(self.bounds));
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if (CGSizeEqualToSize(self.centerOffset, CGSizeZero) == NO) {
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center.x += self.centerOffset.width;
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center.y += self.centerOffset.height;
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}
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CGContextRef currentContext = UIGraphicsGetCurrentContext();
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size_t num_locations = 2;
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CGFloat locations[2] = { 0.0, 1.0 };
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CGFloat components[8] = { 0.0, 0.0, 0.0, 0.7, // Start color
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0.0, 0.0, 0.0, 0.85 }; // End color
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CGColorSpaceRef rgbColorspace = CGColorSpaceCreateDeviceRGB();
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CGGradientRef gradient = CGGradientCreateWithColorComponents(rgbColorspace, components, locations, num_locations);
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CGGradientDrawingOptions options = kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation;
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CGFloat endRadius = [UIApplication sharedApplication].keyWindow.bounds.size.height / 2;
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CGContextDrawRadialGradient(currentContext, gradient, center, 20.0f, center, endRadius, options);
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CGGradientRelease(gradient);
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CGColorSpaceRelease(rgbColorspace);
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}
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- (void)setCenterOffset:(CGSize)offset
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{
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if (CGSizeEqualToSize(_centerOffset, offset) == NO) {
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_centerOffset = offset;
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[self setNeedsDisplay];
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}
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}
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@end
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