mirror of
https://github.com/vector-im/element-ios.git
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139 lines
No EOL
3.8 KiB
Objective-C
139 lines
No EOL
3.8 KiB
Objective-C
/*
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Copyright 2015 OpenMarket Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#import "MXKPieChartView.h"
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@interface MXKPieChartView ()
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{
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// graphical items
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CAShapeLayer* backgroundContainerLayer;
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CAShapeLayer* powerContainerLayer;
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}
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@end
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@implementation MXKPieChartView
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- (void)setProgress:(CGFloat)progress
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{
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// Consider only positive progress value
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if (progress <= 0)
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{
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_progress = 0;
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self.hidden = YES;
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}
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else
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{
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// Ensure that the progress value does not excceed 1.0
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_progress = MIN(progress, 1.0);
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self.hidden = NO;
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}
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// defines the view settings
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CGFloat radius = self.frame.size.width / 2;
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// draw a rounded view
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[self.layer setCornerRadius:radius];
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self.backgroundColor = [UIColor clearColor];
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// draw the pie
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CALayer* layer = [self layer];
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// remove any previous drawn layer
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if (powerContainerLayer)
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{
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[powerContainerLayer removeFromSuperlayer];
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powerContainerLayer = nil;
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}
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// define default colors
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if (!_progressColor)
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{
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_progressColor = [UIColor redColor];
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}
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if (!_unprogressColor)
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{
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_unprogressColor = [UIColor lightGrayColor];
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}
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// the background cell color is hidden the cell is selected.
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// so put in grey the cell background triggers a weird display (the background grey is hidden but not the red part).
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// add an other layer fixes the UX.
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if (!backgroundContainerLayer)
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{
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backgroundContainerLayer = [CAShapeLayer layer];
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[backgroundContainerLayer setZPosition:0];
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[backgroundContainerLayer setStrokeColor:NULL];
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backgroundContainerLayer.fillColor = _unprogressColor.CGColor;
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// build the path
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CGMutablePathRef path = CGPathCreateMutable();
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CGPathMoveToPoint(path, NULL, radius, radius);
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CGPathAddArc(path, NULL, radius, radius, radius, 0 , 2 * M_PI, 0);
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CGPathCloseSubpath(path);
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[backgroundContainerLayer setPath:path];
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CFRelease(path);
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// add the sub layer
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[layer addSublayer:backgroundContainerLayer];
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}
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if (_progress)
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{
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// create the filled layer
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powerContainerLayer = [CAShapeLayer layer];
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[powerContainerLayer setZPosition:0];
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[powerContainerLayer setStrokeColor:NULL];
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// power level is drawn in red
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powerContainerLayer.fillColor = _progressColor.CGColor;
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// build the path
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CGMutablePathRef path = CGPathCreateMutable();
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CGPathMoveToPoint(path, NULL, radius, radius);
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CGPathAddArc(path, NULL, radius, radius, radius, -M_PI / 2, (_progress * 2 * M_PI) - (M_PI / 2), 0);
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CGPathCloseSubpath(path);
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[powerContainerLayer setPath:path];
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CFRelease(path);
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// add the sub layer
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[layer addSublayer:powerContainerLayer];
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}
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}
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- (void)setProgressColor:(UIColor *)progressColor
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{
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_progressColor = progressColor;
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self.progress = _progress;
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}
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- (void)setUnprogressColor:(UIColor *)unprogressColor
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{
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_unprogressColor = unprogressColor;
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if (backgroundContainerLayer)
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{
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[backgroundContainerLayer removeFromSuperlayer];
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backgroundContainerLayer = nil;
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}
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self.progress = _progress;
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}
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@end |