66 lines
1.4 KiB
Mathematica
66 lines
1.4 KiB
Mathematica
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/**
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* Copyright (c) 2015-present, Horcrux.
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* All rights reserved.
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*
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* This source code is licensed under the MIT-style license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "RNSVGCircle.h"
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#import <React/RCTLog.h>
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@implementation RNSVGCircle
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- (void)setCx:(NSString *)cx
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{
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if (cx == _cx) {
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return;
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}
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[self invalidate];
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_cx = cx;
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}
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- (void)setCy:(NSString *)cy
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{
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if (cy == _cy) {
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return;
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}
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[self invalidate];
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_cy = cy;
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}
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- (void)setR:(NSString *)r
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{
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if (r == _r) {
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return;
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}
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[self invalidate];
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_r = r;
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}
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- (CGPathRef)getPath:(CGContextRef)context
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{
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CGMutablePathRef path = CGPathCreateMutable();
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CGFloat cx = [self relativeOnWidth:self.cx];
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CGFloat cy = [self relativeOnHeight:self.cy];
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CGFloat r;
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// radius percentage calculate formula:
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// radius = sqrt(pow((width*percent), 2) + pow((height*percent), 2)) / sqrt(2)
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if ([RNSVGPercentageConverter isPercentage:self.r]) {
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CGFloat radiusPercent = [RNSVGPercentageConverter percentageToFloat:self.r relative:1 offset:0];
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r = sqrt(
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pow([self getContextWidth] * radiusPercent, 2) +
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pow([self getContextHeight] * radiusPercent, 2)
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) / sqrt(2);
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} else {
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r = [self.r floatValue];
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}
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CGPathAddArc(path, nil, cx, cy, r, 0, 2*M_PI, NO);
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return (CGPathRef)CFAutorelease(path);
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}
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@end
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