macos-stats/Carthage/Checkouts/Charts/ChartsDemo-iOS/Objective-C/Demos/LineChartTimeViewController.m

//
//  LineChartTimeViewController.m
//  ChartsDemo
//
//  Copyright 2015 Daniel Cohen Gindi & Philipp Jahoda
//  A port of MPAndroidChart for iOS
//  Licensed under Apache License 2.0
//
//  https://github.com/danielgindi/Charts
//

#import "LineChartTimeViewController.h"
#import "ChartsDemo_iOS-Swift.h"
#import "DateValueFormatter.h"

@interface LineChartTimeViewController () <ChartViewDelegate>

@property (nonatomic, strong) IBOutlet LineChartView *chartView;
@property (nonatomic, strong) IBOutlet UISlider *sliderX;
@property (nonatomic, strong) IBOutlet UITextField *sliderTextX;

@end

@implementation LineChartTimeViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.title = @"Time Line Chart";
    
    self.options = @[
                     @{@"key": @"toggleValues", @"label": @"Toggle Values"},
                     @{@"key": @"toggleFilled", @"label": @"Toggle Filled"},
                     @{@"key": @"toggleCircles", @"label": @"Toggle Circles"},
                     @{@"key": @"toggleCubic", @"label": @"Toggle Cubic"},
                     @{@"key": @"toggleHorizontalCubic", @"label": @"Toggle Horizontal Cubic"},
                     @{@"key": @"toggleStepped", @"label": @"Toggle Stepped"},
                     @{@"key": @"toggleHighlight", @"label": @"Toggle Highlight"},
                     @{@"key": @"animateX", @"label": @"Animate X"},
                     @{@"key": @"animateY", @"label": @"Animate Y"},
                     @{@"key": @"animateXY", @"label": @"Animate XY"},
                     @{@"key": @"saveToGallery", @"label": @"Save to Camera Roll"},
                     @{@"key": @"togglePinchZoom", @"label": @"Toggle PinchZoom"},
                     @{@"key": @"toggleAutoScaleMinMax", @"label": @"Toggle auto scale min/max"},
                     @{@"key": @"toggleData", @"label": @"Toggle Data"},
                     ];
    
    _chartView.delegate = self;
    
    _chartView.chartDescription.enabled = NO;
    
    _chartView.dragEnabled = YES;
    [_chartView setScaleEnabled:YES];
    _chartView.pinchZoomEnabled = NO;
    _chartView.drawGridBackgroundEnabled = NO;
    _chartView.highlightPerDragEnabled = YES;

    _chartView.backgroundColor = UIColor.whiteColor;
    
    _chartView.legend.enabled = NO;
    
    ChartXAxis *xAxis = _chartView.xAxis;
    xAxis.labelPosition = XAxisLabelPositionTopInside;
    xAxis.labelFont = [UIFont fontWithName:@"HelveticaNeue-Light" size:10.f];
    xAxis.labelTextColor = [UIColor colorWithRed:255/255.0 green:192/255.0 blue:56/255.0 alpha:1.0];
    xAxis.drawAxisLineEnabled = NO;
    xAxis.drawGridLinesEnabled = YES;
    xAxis.centerAxisLabelsEnabled = YES;
    xAxis.granularity = 3600.0;
    xAxis.valueFormatter = [[DateValueFormatter alloc] init];
    
    ChartYAxis *leftAxis = _chartView.leftAxis;
    leftAxis.labelPosition = YAxisLabelPositionInsideChart;
    leftAxis.labelFont = [UIFont fontWithName:@"HelveticaNeue-Light" size:12.f];
    leftAxis.labelTextColor = [UIColor colorWithRed:51/255.0 green:181/255.0 blue:229/255.0 alpha:1.0];
    leftAxis.drawGridLinesEnabled = YES;
    leftAxis.granularityEnabled = YES;
    leftAxis.axisMinimum = 0.0;
    leftAxis.axisMaximum = 170.0;
    leftAxis.yOffset = -9.0;
    leftAxis.labelTextColor = [UIColor colorWithRed:255/255.0 green:192/255.0 blue:56/255.0 alpha:1.0];
    
    _chartView.rightAxis.enabled = NO;
    
    _chartView.legend.form = ChartLegendFormLine;
    
    _sliderX.value = 100.0;
    [self slidersValueChanged:nil];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)updateChartData
{
    if (self.shouldHideData)
    {
        _chartView.data = nil;
        return;
    }
    
    [self setDataCount:_sliderX.value range:30.0];
}

- (void)setDataCount:(int)count range:(double)range
{
    NSTimeInterval now = [[NSDate date] timeIntervalSince1970];
    NSTimeInterval hourSeconds = 3600.0;
    
    NSMutableArray *values = [[NSMutableArray alloc] init];
    
    NSTimeInterval from = now - (count / 2.0) * hourSeconds;
    NSTimeInterval to = now + (count / 2.0) * hourSeconds;
    
    for (NSTimeInterval x = from; x < to; x += hourSeconds)
    {
        double y = arc4random_uniform(range) + 50;
        [values addObject:[[ChartDataEntry alloc] initWithX:x y:y]];
    }

    LineChartDataSet *set1 = nil;
    if (_chartView.data.dataSetCount > 0)
    {
        set1 = (LineChartDataSet *)_chartView.data.dataSets[0];
        [set1 replaceEntries: values];
        [_chartView.data notifyDataChanged];
        [_chartView notifyDataSetChanged];
    }
    else
    {
        set1 = [[LineChartDataSet alloc] initWithEntries:values label:@"DataSet 1"];
        set1.axisDependency = AxisDependencyLeft;
        set1.valueTextColor = [UIColor colorWithRed:51/255.0 green:181/255.0 blue:229/255.0 alpha:1.0];
        set1.lineWidth = 1.5;
        set1.drawCirclesEnabled = NO;
        set1.drawValuesEnabled = NO;
        set1.fillAlpha = 0.26;
        set1.fillColor = [UIColor colorWithRed:51/255.0 green:181/255.0 blue:229/255.0 alpha:1.0];
        set1.highlightColor = [UIColor colorWithRed:224/255.0 green:117/255.0 blue:117/255.0 alpha:1.0];
        set1.drawCircleHoleEnabled = NO;
        
        NSMutableArray *dataSets = [[NSMutableArray alloc] init];
        [dataSets addObject:set1];
        
        LineChartData *data = [[LineChartData alloc] initWithDataSets:dataSets];
        [data setValueTextColor:UIColor.whiteColor];
        [data setValueFont:[UIFont fontWithName:@"HelveticaNeue-Light" size:9.0]];
        
        _chartView.data = data;
    }
}

- (void)optionTapped:(NSString *)key
{
    if ([key isEqualToString:@"toggleFilled"])
    {
        for (id<ILineChartDataSet> set in _chartView.data.dataSets)
        {
            set.drawFilledEnabled = !set.isDrawFilledEnabled;
        }
        
        [_chartView setNeedsDisplay];
        return;
    }
    
    if ([key isEqualToString:@"toggleCircles"])
    {
        for (id<ILineChartDataSet> set in _chartView.data.dataSets)
        {
            set.drawCirclesEnabled = !set.isDrawCirclesEnabled;
        }
        
        [_chartView setNeedsDisplay];
        return;
    }
    
    if ([key isEqualToString:@"toggleCubic"])
    {
        for (id<ILineChartDataSet> set in _chartView.data.dataSets)
        {
            set.mode = set.mode == LineChartModeCubicBezier ? LineChartModeLinear : LineChartModeCubicBezier;
        }
        
        [_chartView setNeedsDisplay];
        return;
    }

    if ([key isEqualToString:@"toggleStepped"])
    {
        for (id<ILineChartDataSet> set in _chartView.data.dataSets)
        {
            switch (set.mode) {
                case LineChartModeLinear:
                case LineChartModeCubicBezier:
                case LineChartModeHorizontalBezier:
                    set.mode = LineChartModeStepped;
                    break;
                case LineChartModeStepped: set.mode = LineChartModeLinear;
            }
        }

        [_chartView setNeedsDisplay];
    }
    
    if ([key isEqualToString:@"toggleHorizontalCubic"])
    {
        for (id<ILineChartDataSet> set in _chartView.data.dataSets)
        {
            set.mode = set.mode == LineChartModeCubicBezier ? LineChartModeHorizontalBezier : LineChartModeCubicBezier;
        }
        
        [_chartView setNeedsDisplay];
        return;
    }
    
    [super handleOption:key forChartView:_chartView];
}

#pragma mark - Actions

- (IBAction)slidersValueChanged:(id)sender
{
    _sliderTextX.text = [@((int)_sliderX.value) stringValue];
    
    [self updateChartData];
}

#pragma mark - ChartViewDelegate

- (void)chartValueSelected:(ChartViewBase * __nonnull)chartView entry:(ChartDataEntry * __nonnull)entry highlight:(ChartHighlight * __nonnull)highlight
{
    NSLog(@"chartValueSelected");
}

- (void)chartValueNothingSelected:(ChartViewBase * __nonnull)chartView
{
    NSLog(@"chartValueNothingSelected");
}

@end