//

// HTViewController.m

// CorePlotProgram

//

// Created by wb-shangguanhaitao on 14-2-19.

// Copyright (c) 2014年 shangguan. All rights reserved.

//

#import "HTViewController.h"

#import "CorePlot-CocoaTouch.h"

#import <runetype.h>

#define GREEN_PLOT_IDENTIFIER @"Green Plot"

#define BLUE_PLOT_IDENTIFIER @"Blue Plot"

@interface HTViewController ()<CPTPlotDataSource>

@property (nonatomic, strong) CPTXYGraph *graph;

@property (nonatomic, strong) NSMutableArray *dataForPlot;

/**

* 设置图表绘制的配置

*/

- (void)setupCoreplotViews;

/**

* 简便获取绘制的范围

*

* @param location 绘制的起始位置

* @param length 绘制的长度

*

* @return 绘制范围配置的实例

*/

- (CPTPlotRange *)CPTPlotRangeFromFloat:(float)location length:(float)length;

@end

@implementation HTViewController

#pragma mark - Superclass API

- (void)viewDidLoad

{

[super viewDidLoad];

[self setupCoreplotViews];

// Do any additional setup after loading the view.

}

- (void)didReceiveMemoryWarning

{

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

#pragma mark - Private API

- (void)setupCoreplotViews

{

// Create graph from theme: 设置主题

//

_graph = [[CPTXYGraph alloc] initWithFrame:CGRectZero];

CPTTheme * theme = [CPTTheme themeNamed:kCPTSlateTheme];

[_graph applyTheme:theme];

CPTGraphHostingView * hostingView = [[CPTGraphHostingView alloc] initWithFrame:self.view.bounds];

[self.view addSubview:hostingView];

hostingView.collapsesLayers = NO; // Setting to YES reduces GPU memory usage, but can slow drawing/scrolling

hostingView.hostedGraph = _graph;

_graph.paddingLeft = _graph.paddingRight = 10.0;

_graph.paddingTop = _graph.paddingBottom = 10.0;

// Setup plot space: 设置一屏内可显示的x,y量度范围

//

CPTXYPlotSpace * plotSpace = (CPTXYPlotSpace *)_graph.defaultPlotSpace;

plotSpace.allowsUserInteraction = YES;

plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(1.0) length:CPTDecimalFromFloat(2.0)];

plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(0.0) length:CPTDecimalFromFloat(3.0)];

// Axes: 设置x,y轴属性，如原点，量度间隔，标签，刻度，颜色等

//

CPTXYAxisSet *axisSet = (CPTXYAxisSet *)_graph.axisSet;

CPTMutableLineStyle *lineStyle = [CPTMutableLineStyle lineStyle];

lineStyle.lineWidth = 2.0f;

lineStyle.lineColor = [CPTColor whiteColor];

CPTXYAxis * x = axisSet.xAxis;

x.orthogonalCoordinateDecimal = CPTDecimalFromString(@"1.0"); // 原点的 x 位置

x.majorIntervalLength = CPTDecimalFromString(@"0.5"); // x轴主刻度：显示数字标签的量度间隔

x.minorTicksPerInterval = 2; // x轴细分刻度：每一个主刻度范围内显示细分刻度的个数

x.minorTickLineStyle = lineStyle;

// 需要排除的不显示数字的主刻度

NSArray * exclusionRanges = [NSArray arrayWithObjects:

[self CPTPlotRangeFromFloat:0.99 length:0.02],

[self CPTPlotRangeFromFloat:2.99 length:0.02],

nil];

x.labelExclusionRanges = exclusionRanges;

CPTXYAxis * y = axisSet.yAxis;

y.orthogonalCoordinateDecimal = CPTDecimalFromString(@"2.0"); // 原点的 y 位置

y.majorIntervalLength = CPTDecimalFromString(@"0.5"); // y轴主刻度：显示数字标签的量度间隔

y.minorTicksPerInterval = 4; // y轴细分刻度：每一个主刻度范围内显示细分刻度的个数

y.minorTickLineStyle = lineStyle;

exclusionRanges = [NSArray arrayWithObjects:

[self CPTPlotRangeFromFloat:1.99 length:0.02],

[self CPTPlotRangeFromFloat:2.99 length:0.02],

nil];

y.labelExclusionRanges = exclusionRanges;

// y.delegate = self;

// Add some initial data

//

// Create a red-blue plot area

//

lineStyle = [CPTMutableLineStyle lineStyle];

lineStyle.miterLimit = 1.0f;

lineStyle.lineWidth = 3.0f;

lineStyle.lineColor = [CPTColor blueColor];

CPTScatterPlot * boundLinePlot = [[CPTScatterPlot alloc] init];

boundLinePlot.dataLineStyle = lineStyle;

boundLinePlot.identifier = BLUE_PLOT_IDENTIFIER;

boundLinePlot.dataSource = self;

// boundLinePlot.showLabels = NO;

// Do a red-blue gradient: 渐变色区域

//

CPTColor * blueColor = [CPTColor colorWithComponentRed:0.3 green:0.3 blue:1.0 alpha:0.8];

CPTColor * redColor = [CPTColor colorWithComponentRed:1.0 green:0.3 blue:0.3 alpha:0.8];

CPTGradient * areaGradient1 = [CPTGradient gradientWithBeginningColor:blueColor

endingColor:redColor];

areaGradient1.angle = -90.0f;

CPTFill * areaGradientFill = [CPTFill fillWithGradient:areaGradient1];

boundLinePlot.areaFill = areaGradientFill;

boundLinePlot.areaBaseValue = [[NSDecimalNumber numberWithFloat:1.0] decimalValue]; // 渐变色的起点位置

boundLinePlot.areaFill2 = [CPTFill fillWithColor:[CPTColor orangeColor]];

boundLinePlot.areaBaseValue2 = [[NSDecimalNumber numberWithFloat:1.5] decimalValue]; // 渐变色的起点位置

// Add plot symbols: 表示数值的符号的形状

//

CPTMutableLineStyle * symbolLineStyle = [CPTMutableLineStyle lineStyle];

symbolLineStyle.lineColor = [CPTColor blackColor];

symbolLineStyle.lineWidth = 2.0;

CPTPlotSymbol * plotSymbol = [CPTPlotSymbol ellipsePlotSymbol];

plotSymbol.fill = [CPTFill fillWithColor:[CPTColor blueColor]];

plotSymbol.lineStyle = symbolLineStyle;

plotSymbol.size = CGSizeMake(10.0, 10.0);

boundLinePlot.plotSymbol = plotSymbol;

_dataForPlot = [NSMutableArray arrayWithCapacity:100];

NSUInteger i;

for ( i = 0; i < 100; i++ ) {

id x = [NSNumber numberWithFloat:0 + i * 0.05];

id y = [NSNumber numberWithFloat:1.2 * rand() / (float)RAND_MAX + 1.2];

[_dataForPlot addObject:[NSMutableDictionary dictionaryWithObjectsAndKeys:x, @"x", y, @"y", nil]];

}

[_graph addPlot:boundLinePlot];

// Create a green plot area: 画破折线

//

lineStyle = [CPTMutableLineStyle lineStyle];

lineStyle.lineWidth = 3.f;

lineStyle.lineColor = [CPTColor greenColor];

lineStyle.dashPattern = [NSArray arrayWithObjects:

[NSNumber numberWithFloat:5.0f],

[NSNumber numberWithFloat:5.0f], nil];

CPTScatterPlot * dataSourceLinePlot = [[CPTScatterPlot alloc] init];

dataSourceLinePlot.dataLineStyle = lineStyle;

dataSourceLinePlot.identifier = GREEN_PLOT_IDENTIFIER;

dataSourceLinePlot.dataSource = self;

// Put an area gradient under the plot above

//

CPTColor * areaColor = [CPTColor colorWithComponentRed:0.3 green:1.0 blue:0.3 alpha:0.8];

CPTGradient * areaGradient = [CPTGradient gradientWithBeginningColor:areaColor

endingColor:[CPTColor clearColor]];

areaGradient.angle = -90.0f;

areaGradientFill = [CPTFill fillWithGradient:areaGradient];

dataSourceLinePlot.areaFill = areaGradientFill;

dataSourceLinePlot.areaBaseValue= CPTDecimalFromString(@"1.75");

// Animate in the new plot: 淡入动画

dataSourceLinePlot.opacity = 0.0f;

CABasicAnimation *fadeInAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];

fadeInAnimation.duration = 3.0f;

fadeInAnimation.removedOnCompletion = NO;

fadeInAnimation.fillMode = kCAFillModeForwards;

fadeInAnimation.toValue = [NSNumber numberWithFloat:1.0];

[dataSourceLinePlot addAnimation:fadeInAnimation forKey:@"animateOpacity"];

[_graph addPlot:dataSourceLinePlot];

}

-(CPTPlotRange *)CPTPlotRangeFromFloat:(float)location length:(float)length

{

return [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(location) length:CPTDecimalFromFloat(length)];

}

#pragma mark - Plot Data Source API

-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot

{

return [_dataForPlot count];

}

-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index

{

NSString * key = (fieldEnum == CPTScatterPlotFieldX ? @"x" : @"y");

NSNumber * num = [[_dataForPlot objectAtIndex:index] valueForKey:key];

// Green plot gets shifted above the blue

if ([(NSString *)plot.identifier isEqualToString:GREEN_PLOT_IDENTIFIER]) {

if (fieldEnum == CPTScatterPlotFieldY) {

num = [NSNumber numberWithDouble:[num doubleValue] + 1.0];

}

}

return num;

}

-(CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)index

{

CPTTextLayer *label = [[CPTTextLayer alloc] initWithText:[NSString stringWithFormat:@"%lu", (unsigned long)index]];

CPTMutableTextStyle *textStyle = [label.textStyle mutableCopy];

textStyle.color = [CPTColor lightGrayColor];

label.textStyle = textStyle;

return label;

}

#pragma mark - Axis Delegate API

-(BOOL)axis:(CPTAxis *)axis shouldUpdateAxisLabelsAtLocations:(NSSet *)locations

{

static CPTTextStyle * positiveStyle = nil;

static CPTTextStyle * negativeStyle = nil;

NSNumberFormatter * formatter = axis.labelFormatter;

CGFloat labelOffset = axis.labelOffset;

NSDecimalNumber * zero = [NSDecimalNumber zero];

NSMutableSet * newLabels = [NSMutableSet set];

for (NSDecimalNumber * tickLocation in locations) {

CPTTextStyle *theLabelTextStyle;

if ([tickLocation isGreaterThanOrEqualTo:zero]) {

if (!positiveStyle) {

CPTMutableTextStyle * newStyle = [axis.labelTextStyle mutableCopy];

newStyle.color = [CPTColor greenColor];

positiveStyle = newStyle;

}

theLabelTextStyle = positiveStyle;

}

else {

if (!negativeStyle) {

CPTMutableTextStyle * newStyle = [axis.labelTextStyle mutableCopy];

newStyle.color = [CPTColor redColor];

negativeStyle = newStyle;

}

theLabelTextStyle = negativeStyle;

}

NSString * labelString = [formatter stringForObjectValue:tickLocation];

CPTTextLayer * newLabelLayer= [[CPTTextLayer alloc] initWithText:labelString style:theLabelTextStyle];

CPTAxisLabel * newLabel = [[CPTAxisLabel alloc] initWithContentLayer:newLabelLayer];

newLabel.tickLocation = tickLocation.decimalValue;

newLabel.offset = labelOffset;

[newLabels addObject:newLabel];

}

axis.axisLabels = newLabels;

return NO;

}

@end