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XY Feng December 11, 2012
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//
// XYPieChart.h
// XYPieChart
//
// Created by XY Feng on 2/24/12.
// Copyright (c) 2012 Xiaoyang Feng. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.

#import <UIKit/UIKit.h>

@class XYPieChart;
@protocol XYPieChartDataSource <NSObject>
@required
- (NSUInteger)numberOfSlicesInPieChart:(XYPieChart *)pieChart;
- (CGFloat)pieChart:(XYPieChart *)pieChart valueForSliceAtIndex:(NSUInteger)index;
@optional
- (UIColor *)pieChart:(XYPieChart *)pieChart colorForSliceAtIndex:(NSUInteger)index;
- (NSString *)pieChart:(XYPieChart *)pieChart textForSliceAtIndex:(NSUInteger)index;
@end

@protocol XYPieChartDelegate <NSObject>
@optional
- (void)pieChart:(XYPieChart *)pieChart willSelectSliceAtIndex:(NSUInteger)index;
- (void)pieChart:(XYPieChart *)pieChart didSelectSliceAtIndex:(NSUInteger)index;
- (void)pieChart:(XYPieChart *)pieChart willDeselectSliceAtIndex:(NSUInteger)index;
- (void)pieChart:(XYPieChart *)pieChart didDeselectSliceAtIndex:(NSUInteger)index;
@end

@interface XYPieChart : UIView
@property(nonatomic, weak) id<XYPieChartDataSource> dataSource;
@property(nonatomic, weak) id<XYPieChartDelegate> delegate;
@property(nonatomic, assign) CGFloat startPieAngle;
@property(nonatomic, assign) CGFloat animationSpeed;
@property(nonatomic, assign) CGPoint pieCenter;
@property(nonatomic, assign) CGFloat pieRadius;
@property(nonatomic, assign) BOOL showLabel;
@property(nonatomic, strong) UIFont *labelFont;
@property(nonatomic, strong) UIColor *labelColor;
@property(nonatomic, strong) UIColor *labelShadowColor;
@property(nonatomic, assign) CGFloat labelRadius;
@property(nonatomic, assign) CGFloat selectedSliceStroke;
@property(nonatomic, assign) CGFloat selectedSliceOffsetRadius;
@property(nonatomic, assign) BOOL showPercentage;
- (id)initWithFrame:(CGRect)frame Center:(CGPoint)center Radius:(CGFloat)radius;
- (void)reloadData;
- (void)setPieBackgroundColor:(UIColor *)color;

- (void)setSliceSelectedAtIndex:(NSInteger)index;
- (void)setSliceDeselectedAtIndex:(NSInteger)index;

@end;
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