Demonstrates how to use Stacked Column API to render Stacked ar Chart in SciChart Android. 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.

When you add multiple StackedColumnRenderableSeries into VerticallyStackedColumnsCollection for vertical grouping or into HorizontallyStackedColumnsCollection for horizontal grouping  it allows to render them stacked one above another or side by side. Data provided by its DataSeries can be used to render an XyDataSeries (which contains one X-point and one Y-point), XyyDataSeries (renders Y values), XyzDataSeries, HlDataSeries and OhlcDataSeries(renders Close values). Columns are drawn using the pens provided by the setStrokeStyle(PenStyle) (outline) and using the Brush provided by the setFillBrushStyle(BrushStyle) (fill).

Tip!

Do you need to change the width of a column? Try calling the setDataPointWidth() method passing in any number from 0.0 to 1.0. This alters how much space a column takes up.

// StackedBarChartFragment.java

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// StackedBarChartFragment.java 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.
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package com.scichart.examples.fragments;

import android.view.animation.DecelerateInterpolator;

import com.scichart.charting.model.dataSeries.IXyDataSeries;
import com.scichart.charting.modifiers.CursorModifier;
import com.scichart.charting.modifiers.ZoomExtentsModifier;
import com.scichart.charting.visuals.SciChartSurface;
import com.scichart.charting.visuals.axes.AxisAlignment;
import com.scichart.charting.visuals.axes.IAxis;
import com.scichart.charting.visuals.renderableSeries.StackedColumnRenderableSeries;
import com.scichart.charting.visuals.renderableSeries.VerticallyStackedColumnsCollection;
import com.scichart.core.framework.UpdateSuspender;
import com.scichart.examples.R;
import com.scichart.examples.fragments.base.ExampleBaseFragment;

import java.util.Collections;

import butterknife.BindView;

public class StackedBarChartFragment extends ExampleBaseFragment {
    @BindView(R.id.chart)
    SciChartSurface surface;

    @Override
    protected int getLayoutId() {
        return R.layout.example_single_chart_fragment;
    }

    @Override
    protected void initExample() {

        final IAxis xAxis = sciChartBuilder.newNumericAxis().withAxisAlignment(AxisAlignment.Left).build();
        final IAxis yAxis = sciChartBuilder.newNumericAxis().withAxisAlignment(AxisAlignment.Bottom).withFlipCoordinates(true).build();

        double[] yValues1 = new double[]{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};
        double[] yValues2 = new double[]{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};
        double[] yValues3 = new double[]{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};

        final IXyDataSeries<Double, Double> ds1 = sciChartBuilder.newXyDataSeries(Double.class, Double.class).withSeriesName("data 1").build();
        final IXyDataSeries<Double, Double> ds2 = sciChartBuilder.newXyDataSeries(Double.class, Double.class).withSeriesName("data 2").build();
        final IXyDataSeries<Double, Double> ds3 = sciChartBuilder.newXyDataSeries(Double.class, Double.class).withSeriesName("data 3").build();

        for (int i = 0; i < yValues1.length; i++) {
            double xValue = (double) i;
            ds1.append(xValue, yValues1[i]);
            ds2.append(xValue, yValues2[i]);
            ds3.append(xValue, yValues3[i]);
        }

        final StackedColumnRenderableSeries series1 = sciChartBuilder.newStackedColumn().withDataPointWidth(0.8).withDataSeries(ds1).withLinearGradientColors(0xff567893, 0xff3D5568).withStrokeStyle(0xff567893, 0f).build();
        final StackedColumnRenderableSeries series2 = sciChartBuilder.newStackedColumn().withDataPointWidth(0.8).withDataSeries(ds2).withLinearGradientColors(0xffACBCCA, 0xff439AAF).withStrokeStyle(0xffACBCCA, 0f).build();
        final StackedColumnRenderableSeries series3 = sciChartBuilder.newStackedColumn().withDataPointWidth(0.8).withDataSeries(ds3).withLinearGradientColors(0xffDBE0E1, 0xffB6C1C3).withStrokeStyle(0xffDBE0E1, 0f).build();

        final VerticallyStackedColumnsCollection verticalCollection = new VerticallyStackedColumnsCollection();
        verticalCollection.add(series1);
        verticalCollection.add(series2);
        verticalCollection.add(series3);

        UpdateSuspender.using(surface, new Runnable() {
            @Override
            public void run() {
                Collections.addAll(surface.getRenderableSeries(), verticalCollection);
                Collections.addAll(surface.getXAxes(), xAxis);
                Collections.addAll(surface.getYAxes(), yAxis);
                Collections.addAll(surface.getChartModifiers(), new CursorModifier());
                Collections.addAll(surface.getChartModifiers(), new ZoomExtentsModifier());

                sciChartBuilder.newAnimator(series1).withWaveTransformation().withInterpolator(new DecelerateInterpolator()).withDuration(3000).withStartDelay(350).start();
                sciChartBuilder.newAnimator(series2).withWaveTransformation().withInterpolator(new DecelerateInterpolator()).withDuration(3000).withStartDelay(350).start();
                sciChartBuilder.newAnimator(series3).withWaveTransformation().withInterpolator(new DecelerateInterpolator()).withDuration(3000).withStartDelay(350).start();
            }
        });
    }
}

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