Generates an iOS Column Chart in code. See Documentation on how to use this type here: The iOS Column Chart Documentation.

The SCIFastcolumnRenderableSeries can be used to render a high performance iOS Column Chart in either Swift or Objective C. SciChart iOS supports millions of points out of the box, and is suitable for use in real-time scientific, medical and trading applications.

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

// ColumnChartView.m

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2019. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// ColumnChartView.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 "ColumnChartView.h"
#import "SCDDataManager.h"

@interface ColumnsTripleColorPalette : SCIPaletteProviderBase<SCIFastColumnRenderableSeries *><ISCIFillPaletteProvider>
- (instancetype)init;
@end

@implementation ColumnsTripleColorPalette {
    SCIUnsignedIntegerValues *_colors;
}

static unsigned int desiredColors[] = {0xFFa9d34f, 0xFFfc9930, 0xFFd63b3f};

- (instancetype)init {
    self = [super initWithRenderableSeriesType:SCIFastColumnRenderableSeries.class];
    if (self) {
        _colors = [SCIUnsignedIntegerValues new];
    }
    return self;
}

- (void)update {
    NSInteger count = self.renderableSeries.currentRenderPassData.pointsCount;
    _colors.count = count;
    
    unsigned int *colorsArray = _colors.itemsArray;
    for (NSInteger i = 0; i < count; i++) {
        colorsArray[i] = desiredColors[i % 3];
    }
}

- (SCIUnsignedIntegerValues *)fillColors {
    return _colors;
}

@end

@implementation ColumnChartView

- (Class)associatedType { return SCIChartSurface.class; }

- (void)initExample {
    id<ISCIAxis> xAxis = [SCINumericAxis new];
    xAxis.growBy = [[SCIDoubleRange alloc] initWithMin:0.1 max:0.1];
    
    id<ISCIAxis> yAxis = [SCINumericAxis new];
    yAxis.growBy = [[SCIDoubleRange alloc] initWithMin:0.0 max:0.1];
    
    SCIXyDataSeries *dataSeries = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Double yType:SCIDataType_Double];
    int yValues[] = {50, 35, 61, 58, 50, 50, 40, 53, 55, 23, 45, 12, 59, 60};
    for (size_t i = 0; i < sizeof(yValues)/sizeof(yValues[0]); i++) {
        [dataSeries appendX:@(i) y:@(yValues[i])];
    }
    
    SCIFastColumnRenderableSeries *rSeries = [SCIFastColumnRenderableSeries new];
    rSeries.dataSeries = dataSeries;
    rSeries.paletteProvider = [ColumnsTripleColorPalette new];
    
    [SCIUpdateSuspender usingWithSuspendable:self.surface withBlock:^{
        [self.surface.xAxes add:xAxis];
        [self.surface.yAxes add:yAxis];
        [self.surface.renderableSeries add:rSeries];
        [self.surface.chartModifiers add:[SCDExampleBaseViewController createDefaultModifiers]];

        [SCIAnimations waveSeries:rSeries duration:3.0 andEasingFunction:[SCICubicEase new]];
    }];
}

@end

// ColumnChartView.swift

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2019. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// ColumnChartView.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 ColumnsTripleColorPalette : SCIPaletteProviderBase<SCIFastColumnRenderableSeries>, ISCIFillPaletteProvider {
    
    let colors = SCIUnsignedIntegerValues()
    let desiredColors:[UInt32] = [0xffa9d34f, 0xfffc9930, 0xffd63b3f]
    
    init() {
        super.init(renderableSeriesType: SCIFastColumnRenderableSeries.self)
    }
    
    override func update() {
        let count = renderableSeries!.currentRenderPassData.pointsCount
        colors.count = count
        
        for i in 0 ..< count {
            colors.set(desiredColors[i % 3], at: i)
        }
    }
    
    var fillColors: SCIUnsignedIntegerValues { return colors }
}

class ColumnChartView: SCDSingleChartViewController<SCIChartSurface> {
    
    override var associatedType: AnyClass { return SCIChartSurface.self }
    
    override func initExample() {
        let xAxis = SCINumericAxis()
        xAxis.growBy = SCIDoubleRange(min: 0.1, max: 0.1)
        let yAxis = SCINumericAxis()
        yAxis.growBy = SCIDoubleRange(min: 0, max: 0.1)
        
        let dataSeries = SCIXyDataSeries(xType: .double, yType: .double)
        let yValues = [50, 35, 61, 58, 50, 50, 40, 53, 55, 23, 45, 12, 59, 60];
        for i in 0 ..< yValues.count {
            dataSeries.append(x: i, y: yValues[i])
        }
        
        let rSeries = SCIFastColumnRenderableSeries()
        rSeries.dataSeries = dataSeries
        rSeries.paletteProvider = ColumnsTripleColorPalette()
        
        SCIUpdateSuspender.usingWith(surface) {
            self.surface.xAxes.add(xAxis)
            self.surface.yAxes.add(yAxis)
            self.surface.renderableSeries.add(rSeries)
            self.surface.chartModifiers.add(SCDExampleBaseViewController.createDefaultModifiers())
            
            SCIAnimations.wave(rSeries, duration: 3.0, andEasingFunction: SCICubicEase())
        }
    }
}

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