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Ash_First/PCPieChart.m
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wushenghua 79db7250f2 add PCpieChart
2014-08-15 09:25:42 +08:00

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/**
* Copyright (c) 2011 Muh Hon Cheng
* Created by honcheng on 28/4/11.
*
* 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.
*
* @author Muh Hon Cheng <honcheng@gmail.com>
* @copyright 2011 Muh Hon Cheng
* @version
*
*/
#import "PCPieChart.h"
@implementation PCPieComponent
@synthesize value, title, colour, startDeg, endDeg;
- (id)initWithTitle:(NSString*)_title value:(float)_value
{
self = [super init];
if (self)
{
self.title = _title;
self.value = _value;
self.colour = PCColorDefault;
}
return self;
}
+ (id)pieComponentWithTitle:(NSString*)_title value:(float)_value
{
return [[super alloc] initWithTitle:_title value:_value];
}
- (NSString*)description
{
NSMutableString *text = [NSMutableString string];
[text appendFormat:@"title: %@\n", self.title];
[text appendFormat:@"value: %f\n", self.value];
return text;
}
- (void)dealloc
{
colour = nil;
title = nil;
}
@end
@implementation PCPieChart
@synthesize components;
@synthesize diameter;
@synthesize titleFont, percentageFont;
@synthesize showArrow, sameColorLabel;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
[self setBackgroundColor:[UIColor clearColor]];
self.titleFont = [UIFont fontWithName:@"GeezaPro" size:10];//[UIFont boldSystemFontOfSize:20];
self.percentageFont = [UIFont fontWithName:@"HiraKakuProN-W6" size:20];//[UIFont boldSystemFontOfSize:14];
self.showArrow = YES;
self.sameColorLabel = NO;
}
return self;
}
#define LABEL_TOP_MARGIN 15
#define ARROW_HEAD_LENGTH 6
#define ARROW_HEAD_WIDTH 4
- (void)drawRect:(CGRect)rect
{
// Drawing code
float margin = 15;
if (self.diameter==0)
{
diameter = MIN(rect.size.width, rect.size.height) - 2*margin;
}
float x = (rect.size.width - diameter)/2;
float y = (rect.size.height - diameter)/2;
float gap = 1;
float inner_radius = diameter/2;
float origin_x = x + diameter/2;
float origin_y = y + diameter/2;
// label stuff
float left_label_y = LABEL_TOP_MARGIN;
float right_label_y = LABEL_TOP_MARGIN;
if ([components count]>0)
{
float total = 0;
for (PCPieComponent *component in components)
{
total += component.value;
}
CGContextRef ctx = UIGraphicsGetCurrentContext();
UIGraphicsPushContext(ctx);
CGContextSetRGBFillColor(ctx, 1.0f, 1.0f, 1.0f, 1.0f); // white color
CGContextSetShadow(ctx, CGSizeMake(0.0f, 0.0f), margin);
CGContextFillEllipseInRect(ctx, CGRectMake(x, y, diameter, diameter)); // a white filled circle with a diameter of 100 pixels, centered in (60, 60)
UIGraphicsPopContext();
CGContextSetShadow(ctx, CGSizeMake(0.0f, 0.0f), 0);
float nextStartDeg = 0;
float endDeg = 0;
NSMutableArray *tmpComponents = [NSMutableArray array];
int last_insert = -1;
for (int i=0; i<[components count]; i++)
{
PCPieComponent *component = [components objectAtIndex:i];
float perc = [component value]/total;
endDeg = nextStartDeg+perc*360;
CGContextSetFillColorWithColor(ctx, [component.colour CGColor]);
CGContextMoveToPoint(ctx, origin_x, origin_y);
CGContextAddArc(ctx, origin_x, origin_y, inner_radius, (nextStartDeg-90)*M_PI/180.0, (endDeg-90)*M_PI/180.0, 0);
CGContextClosePath(ctx);
CGContextFillPath(ctx);
CGContextSetRGBStrokeColor(ctx, 1, 1, 1, 1);
CGContextSetLineWidth(ctx, gap);
CGContextMoveToPoint(ctx, origin_x, origin_y);
CGContextAddArc(ctx, origin_x, origin_y, inner_radius, (nextStartDeg-90)*M_PI/180.0, (endDeg-90)*M_PI/180.0, 0);
CGContextClosePath(ctx);
CGContextStrokePath(ctx);
[component setStartDeg:nextStartDeg];
[component setEndDeg:endDeg];
if (nextStartDeg<180)
{
[tmpComponents addObject:component];
}
else
{
if (last_insert==-1)
{
last_insert = i;
[tmpComponents addObject:component];
}
else
{
[tmpComponents insertObject:component atIndex:last_insert];
}
}
nextStartDeg = endDeg;
}
nextStartDeg = 0;
endDeg = 0;
float max_text_width = x - 10;
for (int i=0; i<[tmpComponents count]; i++)
{
PCPieComponent *component = [tmpComponents objectAtIndex:i];
nextStartDeg = component.startDeg;
endDeg = component.endDeg;
if (nextStartDeg > 180 || (nextStartDeg < 180 && endDeg> 270) )
{
// left
// display percentage label
if (self.sameColorLabel)
{
CGContextSetFillColorWithColor(ctx, [component.colour CGColor]);
}
else
{
CGContextSetRGBFillColor(ctx, 0.1f, 0.1f, 0.1f, 1.0f);
}
//CGContextSetRGBStrokeColor(ctx, 1.0f, 1.0f, 1.0f, 1.0f);
//CGContextSetRGBFillColor(ctx, 1.0f, 1.0f, 1.0f, 1.0f);
CGContextSetShadow(ctx, CGSizeMake(0.0f, 0.0f), 3);
//float text_x = x + 10;
NSString *percentageText = [NSString stringWithFormat:@"%.1f%%", component.value/total*100];
CGSize optimumSize = [percentageText sizeWithFont:self.percentageFont constrainedToSize:CGSizeMake(max_text_width,100)];
CGRect percFrame = CGRectMake(5, left_label_y, max_text_width, optimumSize.height);
[percentageText drawInRect:percFrame withFont:self.percentageFont lineBreakMode:UILineBreakModeWordWrap alignment:UITextAlignmentRight];
if (self.showArrow)
{
// draw line to point to chart
CGContextSetRGBStrokeColor(ctx, 0.2f, 0.2f, 0.2f, 1);
CGContextSetRGBFillColor(ctx, 0.0f, 0.0f, 0.0f, 1.0f);
//CGContextSetRGBStrokeColor(ctx, 1.0f, 1.0f, 1.0f, 1.0f);
//CGContextSetRGBFillColor(ctx, 1.0f, 1.0f, 1.0f, 1.0f);
//CGContextSetShadow(ctx, CGSizeMake(0.0f, 0.0f), 5);
int x1 = inner_radius/4*3*cos((nextStartDeg+component.value/total*360/2-90)*M_PI/180.0)+origin_x;
int y1 = inner_radius/4*3*sin((nextStartDeg+component.value/total*360/2-90)*M_PI/180.0)+origin_y;
CGContextSetLineWidth(ctx, 1);
if (left_label_y + optimumSize.height/2 < y)//(left_label_y==LABEL_TOP_MARGIN)
{
CGContextMoveToPoint(ctx, 5 + max_text_width, left_label_y + optimumSize.height/2);
CGContextAddLineToPoint(ctx, x1, left_label_y + optimumSize.height/2);
CGContextAddLineToPoint(ctx, x1, y1);
CGContextStrokePath(ctx);
//CGContextSetRGBFillColor(ctx, 0.0f, 0.0f, 0.0f, 1.0f);
CGContextMoveToPoint(ctx, x1-ARROW_HEAD_WIDTH/2, y1);
CGContextAddLineToPoint(ctx, x1, y1+ARROW_HEAD_LENGTH);
CGContextAddLineToPoint(ctx, x1+ARROW_HEAD_WIDTH/2, y1);
CGContextClosePath(ctx);
CGContextFillPath(ctx);
}
else
{
CGContextMoveToPoint(ctx, 5 + max_text_width, left_label_y + optimumSize.height/2);
if (left_label_y + optimumSize.height/2 > y + diameter)
{
CGContextAddLineToPoint(ctx, x1, left_label_y + optimumSize.height/2);
CGContextAddLineToPoint(ctx, x1, y1);
CGContextStrokePath(ctx);
//CGContextSetRGBFillColor(ctx, 0.0f, 0.0f, 0.0f, 1.0f);
CGContextMoveToPoint(ctx, x1-ARROW_HEAD_WIDTH/2, y1);
CGContextAddLineToPoint(ctx, x1, y1-ARROW_HEAD_LENGTH);
CGContextAddLineToPoint(ctx, x1+ARROW_HEAD_WIDTH/2, y1);
CGContextClosePath(ctx);
CGContextFillPath(ctx);
}
else
{
float y_diff = y1 - (left_label_y + optimumSize.height/2);
if ( (y_diff < 2*ARROW_HEAD_LENGTH && y_diff>0) || (-1*y_diff < 2*ARROW_HEAD_LENGTH && y_diff<0))
{
// straight arrow
y1 = left_label_y + optimumSize.height/2;
CGContextAddLineToPoint(ctx, x1, y1);
CGContextStrokePath(ctx);
//CGContextSetRGBFillColor(ctx, 0.0f, 0.0f, 0.0f, 1.0f);
CGContextMoveToPoint(ctx, x1, y1-ARROW_HEAD_WIDTH/2);
CGContextAddLineToPoint(ctx, x1+ARROW_HEAD_LENGTH, y1);
CGContextAddLineToPoint(ctx, x1, y1+ARROW_HEAD_WIDTH/2);
CGContextClosePath(ctx);
CGContextFillPath(ctx);
}
else if (left_label_y + optimumSize.height/2<y1)
{
// arrow point down
y1 -= ARROW_HEAD_LENGTH;
CGContextAddLineToPoint(ctx, x1, left_label_y + optimumSize.height/2);
CGContextAddLineToPoint(ctx, x1, y1);
CGContextStrokePath(ctx);
//CGContextSetRGBFillColor(ctx, 0.0f, 0.0f, 0.0f, 1.0f);
CGContextMoveToPoint(ctx, x1-ARROW_HEAD_WIDTH/2, y1);
CGContextAddLineToPoint(ctx, x1, y1+ARROW_HEAD_LENGTH);
CGContextAddLineToPoint(ctx, x1+ARROW_HEAD_WIDTH/2, y1);
CGContextClosePath(ctx);
CGContextFillPath(ctx);
}
else
{
// arrow point up
y1 += ARROW_HEAD_LENGTH;
CGContextAddLineToPoint(ctx, x1, left_label_y + optimumSize.height/2);
CGContextAddLineToPoint(ctx, x1, y1);
CGContextStrokePath(ctx);
//CGContextSetRGBFillColor(ctx, 0.0f, 0.0f, 0.0f, 1.0f);
CGContextMoveToPoint(ctx, x1-ARROW_HEAD_WIDTH/2, y1);
CGContextAddLineToPoint(ctx, x1, y1-ARROW_HEAD_LENGTH);
CGContextAddLineToPoint(ctx, x1+ARROW_HEAD_WIDTH/2, y1);
CGContextClosePath(ctx);
CGContextFillPath(ctx);
}
}
}
}
// display title on the left
CGContextSetRGBFillColor(ctx, 0.4f, 0.4f, 0.4f, 1.0f);
left_label_y += optimumSize.height - 4;
optimumSize = [component.title sizeWithFont:self.titleFont constrainedToSize:CGSizeMake(max_text_width,100)];
CGRect titleFrame = CGRectMake(5, left_label_y, max_text_width, optimumSize.height);
[component.title drawInRect:titleFrame withFont:self.titleFont lineBreakMode:UILineBreakModeWordWrap alignment:UITextAlignmentRight];
left_label_y += optimumSize.height + 10;
}
else
{
// right
// display percentage label
if (self.sameColorLabel)
{
CGContextSetFillColorWithColor(ctx, [component.colour CGColor]);
//CGContextSetRGBStrokeColor(ctx, 1.0f, 1.0f, 1.0f, 0.5);
//CGContextSetTextDrawingMode(ctx, kCGTextFillStroke);
}
else
{
CGContextSetRGBFillColor(ctx, 0.1f, 0.1f, 0.1f, 1.0f);
}
//CGContextSetRGBStrokeColor(ctx, 1.0f, 1.0f, 1.0f, 1.0f);
//CGContextSetRGBFillColor(ctx, 1.0f, 1.0f, 1.0f, 1.0f);
CGContextSetShadow(ctx, CGSizeMake(0.0f, 0.0f), 2);
float text_x = x + diameter + 10;
NSString *percentageText = [NSString stringWithFormat:@"%.1f%%", component.value/total*100];
CGSize optimumSize = [percentageText sizeWithFont:self.percentageFont constrainedToSize:CGSizeMake(max_text_width,100)];
CGRect percFrame = CGRectMake(text_x, right_label_y, optimumSize.width, optimumSize.height);
[percentageText drawInRect:percFrame withFont:self.percentageFont];
if (self.showArrow)
{
// draw line to point to chart
CGContextSetRGBStrokeColor(ctx, 0.2f, 0.2f, 0.2f, 1);
CGContextSetRGBFillColor(ctx, 0.0f, 0.0f, 0.0f, 1.0f);
//CGContextSetRGBStrokeColor(ctx, 1.0f, 1.0f, 1.0f, 1.0f);
//CGContextSetRGBFillColor(ctx, 1.0f, 1.0f, 1.0f, 1.0f);
//CGContextSetShadow(ctx, CGSizeMake(0.0f, 0.0f), 5);
CGContextSetLineWidth(ctx, 1);
int x1 = inner_radius/4*3*cos((nextStartDeg+component.value/total*360/2-90)*M_PI/180.0)+origin_x;
int y1 = inner_radius/4*3*sin((nextStartDeg+component.value/total*360/2-90)*M_PI/180.0)+origin_y;
if (right_label_y + optimumSize.height/2 < y)//(right_label_y==LABEL_TOP_MARGIN)
{
CGContextMoveToPoint(ctx, text_x - 3, right_label_y + optimumSize.height/2);
CGContextAddLineToPoint(ctx, x1, right_label_y + optimumSize.height/2);
CGContextAddLineToPoint(ctx, x1, y1);
CGContextStrokePath(ctx);
//CGContextSetRGBFillColor(ctx, 0.0f, 0.0f, 0.0f, 1.0f);
CGContextMoveToPoint(ctx, x1-ARROW_HEAD_WIDTH/2, y1);
CGContextAddLineToPoint(ctx, x1, y1+ARROW_HEAD_LENGTH);
CGContextAddLineToPoint(ctx, x1+ARROW_HEAD_WIDTH/2, y1);
CGContextClosePath(ctx);
CGContextFillPath(ctx);
}
else
{
float y_diff = y1 - (right_label_y + optimumSize.height/2);
if ( (y_diff < 2*ARROW_HEAD_LENGTH && y_diff>0) || (-1*y_diff < 2*ARROW_HEAD_LENGTH && y_diff<0))
{
// straight arrow
y1 = right_label_y + optimumSize.height/2;
CGContextMoveToPoint(ctx, text_x, right_label_y + optimumSize.height/2);
CGContextAddLineToPoint(ctx, x1, y1);
CGContextStrokePath(ctx);
//CGContextSetRGBFillColor(ctx, 0.0f, 0.0f, 0.0f, 1.0f);
CGContextMoveToPoint(ctx, x1, y1-ARROW_HEAD_WIDTH/2);
CGContextAddLineToPoint(ctx, x1-ARROW_HEAD_LENGTH, y1);
CGContextAddLineToPoint(ctx, x1, y1+ARROW_HEAD_WIDTH/2);
CGContextClosePath(ctx);
CGContextFillPath(ctx);
}
else if (right_label_y + optimumSize.height/2<y1)
{
// arrow point down
y1 -= ARROW_HEAD_LENGTH;
CGContextMoveToPoint(ctx, text_x, right_label_y + optimumSize.height/2);
CGContextAddLineToPoint(ctx, x1, right_label_y + optimumSize.height/2);
//CGContextAddLineToPoint(ctx, x1+5, y1);
CGContextAddLineToPoint(ctx, x1, y1);
CGContextStrokePath(ctx);
//CGContextSetRGBFillColor(ctx, 0.0f, 0.0f, 0.0f, 1.0f);
CGContextMoveToPoint(ctx, x1+ARROW_HEAD_WIDTH/2, y1);
CGContextAddLineToPoint(ctx, x1, y1+ARROW_HEAD_LENGTH);
CGContextAddLineToPoint(ctx, x1-ARROW_HEAD_WIDTH/2, y1);
CGContextClosePath(ctx);
CGContextFillPath(ctx);
}
else //if (nextStartDeg<180 && endDeg>180)
{
// arrow point up
y1 += ARROW_HEAD_LENGTH;
CGContextMoveToPoint(ctx, text_x, right_label_y + optimumSize.height/2);
CGContextAddLineToPoint(ctx, x1, right_label_y + optimumSize.height/2);
CGContextAddLineToPoint(ctx, x1, y1);
CGContextStrokePath(ctx);
//CGContextSetRGBFillColor(ctx, 0.0f, 0.0f, 0.0f, 1.0f);
CGContextMoveToPoint(ctx, x1+ARROW_HEAD_WIDTH/2, y1);
CGContextAddLineToPoint(ctx, x1, y1-ARROW_HEAD_LENGTH);
CGContextAddLineToPoint(ctx, x1-ARROW_HEAD_WIDTH/2, y1);
CGContextClosePath(ctx);
CGContextFillPath(ctx);
}
}
}
// display title on the left
CGContextSetRGBFillColor(ctx, 0.4f, 0.4f, 0.4f, 1.0f);
right_label_y += optimumSize.height - 4;
optimumSize = [component.title sizeWithFont:self.titleFont constrainedToSize:CGSizeMake(max_text_width,100)];
CGRect titleFrame = CGRectMake(text_x, right_label_y, optimumSize.width, optimumSize.height);
[component.title drawInRect:titleFrame withFont:self.titleFont];
right_label_y += optimumSize.height + 10;
}
nextStartDeg = endDeg;
}
}
}
- (void)dealloc
{
self.titleFont = nil;
self.percentageFont = nil;
self.components = nil;
}
@end
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