Generates an iOS Stacked Bars chart. A Stacked Bars chart is a Stacked Column chart rotated 90 degrees, so that the columns are rendered horizontally. In order to achieve this effect, we create a Stacked Column chart, then use the XAxis and YAxis alignment to rotate the chart. See Documentation on how to use this type here: The iOS Stacked Column Chart.

The SCIStackedColumnRenderableSeries API can be used to render columns stacked above each other, or side by side in either Swift or Objective C. Grouping is performed when you place multiple SCIStackedColumnRenderableSeries into a SCIVerticallyStackedMountainsCollection or for horizontal column groups, the SCIHorizontallyStackedColumnsCollection.

Data is provided by a DataSeries, e.g. the SCIXyDataSeries, SCIXyyDataSeries (uses Y1 only) or SCIOhlcDataSeries (renders close).

// StackedBarChartView.m

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2019. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// RealTimeGhostTracesChartView.m is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use.
//
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied.
//******************************************************************************

#import "RealTimeGhostTracesChartView.h"
#import "SCDDataManager.h"
#import "SCDRandomUtil.h"

@implementation RealTimeGhostTracesChartView {
    NSTimer *_timer;

    double _lastAmplitude;
    double _phase;
}

- (void)commonInit {
    __weak typeof(self) wSelf = self;
    self.speedChanged = ^(UISlider *sender) { [wSelf onSpeedChanged:sender]; };
}

- (void)initExample {
    _lastAmplitude = 1.0;
    
    id<ISCIAxis> xAxis = [SCINumericAxis new];
    xAxis.autoRange = SCIAutoRange_Always;
    
    id<ISCIAxis> yAxis = [SCINumericAxis new];
    yAxis.autoRange = SCIAutoRange_Never;
    yAxis.visibleRange = [[SCIDoubleRange alloc] initWithMin:-2.0 max:2.0];
    
    [self.surface.xAxes add:xAxis];
    [self.surface.yAxes add:yAxis];
    
    uint limeGreen = 0xFF32CD32;
    
    [self addLineRenderableSeries:limeGreen opacity:1.0];
    [self addLineRenderableSeries:limeGreen opacity:0.9];
    [self addLineRenderableSeries:limeGreen opacity:0.8];
    [self addLineRenderableSeries:limeGreen opacity:0.7];
    [self addLineRenderableSeries:limeGreen opacity:0.62];
    [self addLineRenderableSeries:limeGreen opacity:0.55];
    [self addLineRenderableSeries:limeGreen opacity:0.45];
    [self addLineRenderableSeries:limeGreen opacity:0.35];
    [self addLineRenderableSeries:limeGreen opacity:0.25];
    [self addLineRenderableSeries:limeGreen opacity:0.15];
    
    _timer = [NSTimer scheduledTimerWithTimeInterval:0.02 target:self selector:@selector(updateData:) userInfo:nil repeats:YES];
}

- (void)willMoveToWindow:(UIWindow *)newWindow{
    [super willMoveToWindow: newWindow];
    
    if (newWindow == nil) {
        [_timer invalidate];
        _timer = nil;
    }
}

- (void)onSpeedChanged:(UISlider *) sender {
    if (sender.value > 0) {
        if (_timer != nil) {
            [_timer invalidate];
        }
        _timer = [NSTimer scheduledTimerWithTimeInterval:sender.value / 1000.0 target:self selector:@selector(updateData:) userInfo:nil repeats:YES];
    }
}

- (void)updateData:(NSTimer *)timer {
    [SCIUpdateSuspender usingWithSuspendable:self.surface withBlock:^{
        SCIXyDataSeries *dataSeries = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Double yType:SCIDataType_Double];

        double randomAmplitude = _lastAmplitude + ([SCDRandomUtil nextDouble] - 0.5);
        if (randomAmplitude < -2.0) {
            randomAmplitude = -2.0;
        } else if (randomAmplitude > 2.0) {
            randomAmplitude = 2.0;
        }
        
        SCDDoubleSeries *noisySinewave = [SCDDataManager getNoisySinewaveWithAmplitude:randomAmplitude Phase:_phase PointCount:1000 NoiseAmplitude:0.25];
        _lastAmplitude = randomAmplitude;
    
        [dataSeries appendValuesX:noisySinewave.xValues y:noisySinewave.yValues];
        
        [self reassignRenderSeriesWithDataSeries:dataSeries];
    }];
}

- (void)reassignRenderSeriesWithDataSeries:(SCIXyDataSeries *)dataSeries {
    SCIRenderableSeriesCollection *rs = self.surface.renderableSeries;
    
    // shift old dataSeries
    [rs itemAt:9].dataSeries = [rs itemAt:8].dataSeries;
    [rs itemAt:8].dataSeries = [rs itemAt:7].dataSeries;
    [rs itemAt:7].dataSeries = [rs itemAt:6].dataSeries;
    [rs itemAt:6].dataSeries = [rs itemAt:5].dataSeries;
    [rs itemAt:5].dataSeries = [rs itemAt:4].dataSeries;
    [rs itemAt:4].dataSeries = [rs itemAt:3].dataSeries;
    [rs itemAt:3].dataSeries = [rs itemAt:2].dataSeries;
    [rs itemAt:2].dataSeries = [rs itemAt:1].dataSeries;
    [rs itemAt:1].dataSeries = [rs itemAt:0].dataSeries;
    
    // use new dataSeries to draw first renderableSeries
    [rs itemAt:0].dataSeries = dataSeries;
}

- (void)addLineRenderableSeries:(uint)color opacity:(float)opacity {
    SCIFastLineRenderableSeries *lineRenerableSeries = [SCIFastLineRenderableSeries new];
    lineRenerableSeries.opacity = opacity;
    lineRenerableSeries.strokeStyle = [[SCISolidPenStyle alloc] initWithColorCode:color thickness:1];
    
    [self.surface.renderableSeries add:lineRenerableSeries];
}

@end

// StackedBarChartView.swift

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2019. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// StackedBarChartView.swift is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use.
//
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied.
//******************************************************************************

class StackedBarChartView: SingleChartLayout {
   
    override func initExample() {
        let xAxis = SCINumericAxis()
        xAxis.axisAlignment = .left
        
        let yAxis = SCINumericAxis()
        yAxis.axisAlignment = .bottom
        yAxis.flipCoordinates = true
        
        let yValues1 = [0.0, 0.1, 0.2, 0.4, 0.8, 1.1, 1.5, 2.4, 4.6, 8.1, 11.7, 14.4, 16.0, 13.7, 10.1, 6.4, 3.5, 2.5, 5.4, 6.4, 7.1, 8.0, 9.0]
        let yValues2 = [2.0, 10.1, 10.2, 10.4, 10.8, 1.1, 11.5, 3.4, 4.6, 0.1, 1.7, 14.4, 16.0, 13.7, 10.1, 6.4, 3.5, 2.5, 1.4, 0.4, 10.1, 0.0, 0.0]
        let yValues3 = [20.0, 4.1, 4.2, 10.4, 10.8, 1.1, 11.5, 3.4, 4.6, 5.1, 5.7, 14.4, 16.0, 13.7, 10.1, 6.4, 3.5, 2.5, 1.4, 10.4, 8.1, 10.0, 15.0]
        
        let ds1 = SCIXyDataSeries(xType: .double, yType: .double)
        ds1.seriesName = "Data 1"
        let ds2 = SCIXyDataSeries(xType: .double, yType: .double)
        ds2.seriesName = "Data 2"
        let ds3 = SCIXyDataSeries(xType: .double, yType: .double)
        ds3.seriesName = "Data 3"
        
        for i in 0..<yValues1.count {
            ds1.append(x: i, y: yValues1[i])
            ds2.append(x: i, y: yValues2[i])
            ds3.append(x: i, y: yValues3[i])
        }
     
        SCIUpdateSuspender.usingWith(surface) {
            let columnCollection = SCIVerticallyStackedColumnsCollection()
            columnCollection.add(self.getRenderableSeriesWith(dataSeries: ds1, startColor: 0xff567893, endColor:0xff3D5568))
            columnCollection.add(self.getRenderableSeriesWith(dataSeries: ds2, startColor: 0xffACBCCA, endColor:0xff439AAF))
            columnCollection.add(self.getRenderableSeriesWith(dataSeries: ds3, startColor: 0xffDBE0E1, endColor:0xffB6C1C3))
            
            self.surface.xAxes.add(xAxis)
            self.surface.yAxes.add(yAxis)
            self.surface.renderableSeries.add(columnCollection)
            self.surface.chartModifiers.add(SCIZoomExtentsModifier())
            self.surface.chartModifiers.add(SCICursorModifier())
        }
    }
    
    fileprivate func getRenderableSeriesWith(dataSeries: SCIXyDataSeries, startColor: uint, endColor: uint) -> SCIStackedColumnRenderableSeries {
        let rSeries = SCIStackedColumnRenderableSeries()
        rSeries.dataSeries = dataSeries
        rSeries.fillBrushStyle = SCILinearGradientBrushStyle(start: CGPoint(x: 0.5, y: 0.0), end: CGPoint(x: 0.5, y: 1.0), startColorCode: startColor, endColorCode: endColor)
        rSeries.strokeStyle = SCISolidPenStyle(color: UIColor.black, thickness: 0.5)
        
        SCIAnimations.wave(rSeries, duration: 3.0, andEasingFunction: SCICubicEase())
        
        return rSeries
    }
    
}

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