Android Chart Drag Axis to Scale

Android Chart - Examples

SciChart Android ships with ~90 Android Chart Examples which you can browse, play with, view the source-code and even export each SciChart Android Chart Example to a stand-alone Android Studio project. All of this is possible with the new and improved SciChart Android Examples Suite, which ships as part of our Android Charts SDK.

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Showcases how to add Axis-Drag scaling to a Android Chart Control using the YAxisDragModifier and XAxisDragModifier. ChartModifiers can be added to the ChartModifierCollection through the setChartModifiers() method.

Tips!

Drag modifiers can be used in Absolute mode (when YAxis.getAutoRange()=false) as well as Relative mode (when YAxis.getAutoRange()=true).

The behavior can be changed from Scale to Pan via the setDragMode() method. The AxisDragMode.Scale is the default mode.

The full source code for the Android Chart Drag Axis to Scale example is included below (Scroll down!).

Did you know you can also view the source code from one of the following sources as well?

Clone the SciChart.Android.Examples from Github.
Or, view source and export each example to an Android Studio project from the Java version of the SciChart Android Examples app.
Also the SciChart Android Trial contains the full source for the examples (link below).

DOWNLOAD THE ANDROID CHART EXAMPLES

Kotlin: DragAxisToScaleChartFragment.kt

View source code

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2021. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// DragAxisToScaleChartFragment.kt is part of SCICHART®, High Performance Scientific Charts
// For full terms and conditions of the license, see http://www.scichart.com/scichart-eula/
//
// This source code is protected by international copyright law. Unauthorized
// reproduction, reverse-engineering, or distribution of all or any portion of
// this source code is strictly prohibited.
//
// This source code contains confidential and proprietary trade secrets of
// SciChart Ltd., and should at no time be copied, transferred, sold,
// distributed or made available without express written permission.
//******************************************************************************

package com.scichart.examples.fragments.examples2d.zoomAndPanAChart.kt

import android.view.View
import android.view.animation.DecelerateInterpolator
import android.widget.AdapterView
import android.widget.Spinner
import com.scichart.charting.ClipMode.None
import com.scichart.charting.Direction2D
import com.scichart.charting.Direction2D.XyDirection
import com.scichart.charting.modifiers.AxisDragModifierBase.AxisDragMode
import com.scichart.charting.modifiers.AxisDragModifierBase.AxisDragMode.Scale
import com.scichart.charting.modifiers.XAxisDragModifier
import com.scichart.charting.modifiers.YAxisDragModifier
import com.scichart.charting.visuals.SciChartSurface
import com.scichart.charting.visuals.axes.AxisAlignment.*
import com.scichart.data.model.DoubleRange
import com.scichart.examples.R
import com.scichart.examples.components.SpinnerStringAdapter
import com.scichart.examples.data.DataManager
import com.scichart.examples.fragments.base.ExampleSingleChartBaseFragment
import com.scichart.examples.utils.Constant
import com.scichart.examples.utils.EnumUtils
import com.scichart.examples.utils.ItemSelectedListenerBase
import com.scichart.examples.utils.ViewSettingsUtil
import com.scichart.examples.utils.interpolator.CubicInOutInterpolator
import com.scichart.examples.utils.interpolator.DefaultInterpolator
import com.scichart.examples.utils.scichartExtensions.*
import com.scichart.examples.utils.widgetgeneration.ImageViewWidget
import com.scichart.examples.utils.widgetgeneration.Widget

class DragAxisToScaleChartFragment : ExampleSingleChartBaseFragment() {
    private lateinit var xAxisDragModifier: XAxisDragModifier
    private lateinit var yAxisDragModifier: YAxisDragModifier

    private var selectedDragMode = Scale
    private var selectedDirection = XyDirection

    override fun getToolbarItems(): List<Widget> = ArrayList<Widget>().apply {
        add(ImageViewWidget.Builder().setId(R.drawable.example_toolbar_settings).setListener { openSettingsDialog() }.build())
    }

    override fun initExample(surface: SciChartSurface) {
        val fourierSeries = DataManager.getInstance().getFourierSeries(1.0, 0.1, 5000)
        val dampedSinewave = DataManager.getInstance().getDampedSinewave(1500, 3.0, 0.0, 0.005, 5000, 10)

        surface.suspendUpdates {
            xAxes {
                numericAxis {
                    axisAlignment = Top
                    textFormatting = "0.0"
                    growBy = DoubleRange(0.1, 0.1)
                    visibleRange = DoubleRange(3.0, 6.0)
                }
            }
            yAxes {
                numericAxis {
                    axisId = "RightAxisId"
                    axisAlignment = Right
                    setTextColor(0xFF47bde6)
                    growBy = DoubleRange(0.1, 0.1)
                }
                numericAxis {
                    axisId = "LeftAxisId"
                    axisAlignment = Left
                    setTextColor(0xFFae418d)
                    growBy = DoubleRange(0.1, 0.1)
                }
            }

            renderableSeries {
                fastMountainRenderableSeries {
                    yAxisId = "LeftAxisId"
                    areaStyle = SolidBrushStyle(0x77ae418d)
                    strokeStyle = SolidPenStyle(0xFFc43360, 2f)
                    xyDataSeries<Double, Double> { append(fourierSeries.xValues, fourierSeries.yValues) }

                    scaleAnimation {
                        interpolator = DefaultInterpolator.getInterpolator()
                        duration = Constant.ANIMATION_DURATION
                        startDelay = Constant.ANIMATION_START_DELAY
                    }
                }
                fastLineRenderableSeries {
                    yAxisId = "RightAxisID"
                    strokeStyle = SolidPenStyle(0xFF47bde6, 2f)
                    xyDataSeries<Double, Double> { append(dampedSinewave.xValues, dampedSinewave.yValues) }

                    sweepAnimation {
                        duration = Constant.ANIMATION_DURATION
                        startDelay = Constant.ANIMATION_START_DELAY
                        interpolator = DefaultInterpolator.getInterpolator()
                    }
                }
            }

            chartModifiers {
                xAxisDragModifier { clipModeX = None; xAxisDragModifier = this }
                yAxisDragModifier { yAxisDragModifier = this }
                zoomPanModifier { receiveHandledEvents = true }
                zoomExtentsModifier()
            }
        }
    }

    private fun openSettingsDialog() {
        val dialog = ViewSettingsUtil.createSettingsPopup(activity, R.layout.example_drag_axis_to_scale_chart_layout_popup)
        val context = dialog.context

        val axisDragModeAdapter = SpinnerStringAdapter(context, EnumUtils.getEnumValuesArray(AxisDragMode::class.java))
        dialog.findViewById<Spinner>(R.id.axis_drag_mode_spinner).run {
            adapter = axisDragModeAdapter
            setSelection(axisDragModeAdapter.getPosition(selectedDragMode.toString()))
            onItemSelectedListener = object : ItemSelectedListenerBase() {
                override fun onItemSelected(parent: AdapterView<*>?, view: View, position: Int, id: Long) {
                    selectedDragMode = AxisDragMode.valueOf(axisDragModeAdapter.getItem(position)!!)
                    xAxisDragModifier.dragMode = selectedDragMode
                    yAxisDragModifier.dragMode = selectedDragMode
                }
            }
        }

        val xyDirectionAdapter = SpinnerStringAdapter(context, EnumUtils.getEnumValuesArray(Direction2D::class.java))
        dialog.findViewById<Spinner>(R.id.direction_spinner).run {
            adapter = xyDirectionAdapter
            setSelection(xyDirectionAdapter.getPosition(selectedDirection.toString()))
            onItemSelectedListener = object : ItemSelectedListenerBase() {
                override fun onItemSelected(parent: AdapterView<*>?, view: View, position: Int, id: Long) {
                    selectedDirection = Direction2D.valueOf(xyDirectionAdapter.getItem(position)!!)
                    updateAxesDragDirections(selectedDirection)
                }
            }
        }

        dialog.show()
    }

    private fun updateAxesDragDirections(direction: Direction2D) {
        when (direction) {
            Direction2D.XDirection -> {
                xAxisDragModifier.isEnabled = true
                yAxisDragModifier.isEnabled = false
            }
            Direction2D.YDirection -> {
                xAxisDragModifier.isEnabled = false
                yAxisDragModifier.isEnabled = true
            }
            XyDirection -> {
                xAxisDragModifier.isEnabled = true
                yAxisDragModifier.isEnabled = true
            }
        }
    }
}

Java: DragAxisToScaleChartFragment.java

View source code

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2021. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// DragAxisToScaleChartFragment.java is part of SCICHART®, High Performance Scientific Charts
// For full terms and conditions of the license, see http://www.scichart.com/scichart-eula/
//
// This source code is protected by international copyright law. Unauthorized
// reproduction, reverse-engineering, or distribution of all or any portion of
// this source code is strictly prohibited.
//
// This source code contains confidential and proprietary trade secrets of
// SciChart Ltd., and should at no time be copied, transferred, sold,
// distributed or made available without express written permission.
//******************************************************************************

package com.scichart.examples.fragments.examples2d.zoomAndPanAChart;

import static com.scichart.charting.modifiers.AxisDragModifierBase.AxisDragMode;

import android.app.Dialog;
import android.content.Context;
import android.view.View;
import android.view.animation.DecelerateInterpolator;
import android.widget.AdapterView;
import android.widget.Spinner;

import androidx.annotation.NonNull;

import com.scichart.charting.ClipMode;
import com.scichart.charting.Direction2D;
import com.scichart.charting.model.dataSeries.XyDataSeries;
import com.scichart.charting.modifiers.ModifierGroup;
import com.scichart.charting.modifiers.XAxisDragModifier;
import com.scichart.charting.modifiers.YAxisDragModifier;
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.FastLineRenderableSeries;
import com.scichart.charting.visuals.renderableSeries.FastMountainRenderableSeries;
import com.scichart.core.framework.UpdateSuspender;
import com.scichart.examples.R;
import com.scichart.examples.components.SpinnerStringAdapter;
import com.scichart.examples.data.DataManager;
import com.scichart.examples.data.DoubleSeries;
import com.scichart.examples.fragments.base.ExampleSingleChartBaseFragment;
import com.scichart.examples.utils.Constant;
import com.scichart.examples.utils.EnumUtils;
import com.scichart.examples.utils.ItemSelectedListenerBase;
import com.scichart.examples.utils.ViewSettingsUtil;
import com.scichart.examples.utils.interpolator.CubicInOutInterpolator;
import com.scichart.examples.utils.interpolator.DefaultInterpolator;
import com.scichart.examples.utils.widgetgeneration.ImageViewWidget;
import com.scichart.examples.utils.widgetgeneration.Widget;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class DragAxisToScaleChartFragment extends ExampleSingleChartBaseFragment {

    private XAxisDragModifier xAxisDragModifier;
    private YAxisDragModifier yAxisDragModifier;

    private AxisDragMode selectedDragMode = AxisDragMode.Scale;
    private Direction2D selectedDirection = Direction2D.XyDirection;

    @NonNull
    @Override
    public List<Widget> getToolbarItems() {
        return new ArrayList<Widget>() {{
                add(new ImageViewWidget.Builder().setId(R.drawable.example_toolbar_settings).setListener(v -> openSettingsDialog()).build());
        }};
    }

    @Override
    protected void initExample(@NonNull SciChartSurface surface) {
        final IAxis xAxis = sciChartBuilder.newNumericAxis().withTextFormatting("0.0").withAxisAlignment(AxisAlignment.Top).withGrowBy(0.1, 0.1).withVisibleRange(3, 6).build();
        final IAxis rightYAxis = sciChartBuilder.newNumericAxis().withAxisId("RightAxisId").withAxisAlignment(AxisAlignment.Right).withTextColor(0xFF47bde6).withGrowBy(0.1, 0.1).build();
        final IAxis leftYAxis = sciChartBuilder.newNumericAxis().withAxisId("LeftAxisId").withAxisAlignment(AxisAlignment.Left).withTextColor(0xFFae418d).withGrowBy(0.1, 0.1).build();

        final DoubleSeries fourierSeries = DataManager.getInstance().getFourierSeries(1.0, 0.1, 5000);
        final DoubleSeries dampedSinewave = DataManager.getInstance().getDampedSinewave(1500, 3.0, 0.0, 0.005, 5000, 10);

        final XyDataSeries<Double, Double> mountainDS = sciChartBuilder.newXyDataSeries(Double.class, Double.class).build();
        final XyDataSeries<Double, Double> lineDS = sciChartBuilder.newXyDataSeries(Double.class, Double.class).build();

        mountainDS.append(fourierSeries.xValues, fourierSeries.yValues);
        lineDS.append(dampedSinewave.xValues, dampedSinewave.yValues);

        final FastMountainRenderableSeries mountainRenderableSeries = sciChartBuilder.newMountainSeries().withDataSeries(mountainDS).withAreaFillColor(0x77ae418d).withStrokeStyle(0xFFc43360, 2f, true).withYAxisId("LeftAxisId").build();
        final FastLineRenderableSeries lineRenderableSeries = sciChartBuilder.newLineSeries().withDataSeries(lineDS).withStrokeStyle(0xFF47bde6, 2f, true).withYAxisId("RightAxisId").build();

        UpdateSuspender.using(surface, () -> {
            Collections.addAll(surface.getXAxes(), xAxis);
            Collections.addAll(surface.getYAxes(), leftYAxis, rightYAxis);
            Collections.addAll(surface.getRenderableSeries(), mountainRenderableSeries, lineRenderableSeries);

            xAxisDragModifier = new XAxisDragModifier();
            xAxisDragModifier.setClipModeX(ClipMode.None);

            yAxisDragModifier = new YAxisDragModifier();

            ModifierGroup modifiers = sciChartBuilder.newModifierGroup()
                    .withModifier(xAxisDragModifier)
                    .withModifier(yAxisDragModifier)
                    .withZoomPanModifier().withReceiveHandledEvents(true).build()
                    .withZoomExtentsModifier().build()
                    .build();

            Collections.addAll(surface.getChartModifiers(), modifiers);

            sciChartBuilder.newAnimator(lineRenderableSeries).withSweepTransformation().withInterpolator(DefaultInterpolator.getInterpolator()).withDuration(Constant.ANIMATION_DURATION).withStartDelay(Constant.ANIMATION_START_DELAY).start();
            sciChartBuilder.newAnimator(mountainRenderableSeries).withScaleTransformation().withInterpolator(DefaultInterpolator.getInterpolator()).withDuration(Constant.ANIMATION_DURATION).withStartDelay(Constant.ANIMATION_START_DELAY).start();
        });
    }

    private void openSettingsDialog() {
        final Dialog dialog = ViewSettingsUtil.createSettingsPopup(getActivity(), R.layout.example_drag_axis_to_scale_chart_layout_popup);
        Context context = dialog.getContext();

        final SpinnerStringAdapter axisDragModeAdapter = new SpinnerStringAdapter(context, EnumUtils.getEnumValuesArray(AxisDragMode.class));
        final Spinner axisDragModeSpinner = (Spinner) dialog.findViewById(R.id.axis_drag_mode_spinner);
        axisDragModeSpinner.setAdapter(axisDragModeAdapter);
        axisDragModeSpinner.setSelection(axisDragModeAdapter.getPosition(String.valueOf(selectedDragMode)));
        axisDragModeSpinner.setOnItemSelectedListener(new ItemSelectedListenerBase() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                selectedDragMode = AxisDragMode.valueOf(axisDragModeAdapter.getItem(position));
                xAxisDragModifier.setDragMode(selectedDragMode);
                yAxisDragModifier.setDragMode(selectedDragMode);
            }
        });

        final SpinnerStringAdapter xyDirectionAdapter = new SpinnerStringAdapter(context, EnumUtils.getEnumValuesArray(Direction2D.class));
        final Spinner directionSpinner = (Spinner) dialog.findViewById(R.id.direction_spinner);
        directionSpinner.setAdapter(xyDirectionAdapter);
        directionSpinner.setSelection(xyDirectionAdapter.getPosition(String.valueOf(selectedDirection)));
        directionSpinner.setOnItemSelectedListener(new ItemSelectedListenerBase() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                selectedDirection = Direction2D.valueOf(xyDirectionAdapter.getItem(position));
                updateAxesDragDirections(selectedDirection);
            }
        });

        dialog.show();
    }

    private void updateAxesDragDirections(Direction2D direction) {
        switch (direction) {
            case XDirection:
                xAxisDragModifier.setIsEnabled(true);
                yAxisDragModifier.setIsEnabled(false);
                break;
            case YDirection:
                xAxisDragModifier.setIsEnabled(false);
                yAxisDragModifier.setIsEnabled(true);
                break;
            case XyDirection:
                xAxisDragModifier.setIsEnabled(true);
                yAxisDragModifier.setIsEnabled(true);
                break;
        }
    }
}

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Android Chart Drag Axis to Scale

Android Chart - Examples

Kotlin: DragAxisToScaleChartFragment.kt

Java: DragAxisToScaleChartFragment.java

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