In SciChart Android, it is possible to customize the look and feel of Tooltips for our Android control. This examples demonstrates how to do this using CursorModifier.

What can be customized? The actual tooltips style (background, size, opacity) as well as text style (font family, font size, weight, text color). The marker which intersects the series, and also text formatting of the cursor tooltip itself.

// example_single_chart_fragment.xml

<?xml version="1.0" encoding="utf-8"?><!--*************************************************************************-->
<!-- SCICHART® Copyright SciChart Ltd. 2011-2016. All rights reserved. -->
<!--   -->
<!-- Web: http://www.scichart.com -->
<!-- Support: support@scichart.com -->
<!-- Sales:   sales@scichart.com -->
<!--  -->
<!-- example_single_chart_fragment.xml 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. -->
<!--*************************************************************************-->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.scichart.charting.visuals.SciChartSurface
        android:id="@+id/chart"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

</LinearLayout>

// CustomizationCursorModifierTooltipsFragment.java

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2017. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// CustomizationCursorModifierTooltipsFragment.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.
//
// 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.
//******************************************************************************

package com.scichart.examples.fragments.customizationCursorModifierTooltips;

import android.content.Context;
import android.text.SpannableStringBuilder;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.animation.DecelerateInterpolator;

import com.scichart.charting.model.dataSeries.XyDataSeries;
import com.scichart.charting.modifiers.CursorModifier;
import com.scichart.charting.visuals.SciChartSurface;
import com.scichart.charting.visuals.axes.IAxis;
import com.scichart.charting.visuals.renderableSeries.FastLineRenderableSeries;
import com.scichart.charting.visuals.renderableSeries.hitTest.DefaultXySeriesInfoProvider;
import com.scichart.charting.visuals.renderableSeries.hitTest.XySeriesInfo;
import com.scichart.charting.visuals.renderableSeries.tooltips.ISeriesTooltip;
import com.scichart.charting.visuals.renderableSeries.tooltips.XySeriesTooltip;
import com.scichart.core.framework.UpdateSuspender;
import com.scichart.drawing.common.SolidPenStyle;
import com.scichart.drawing.utility.ColorUtil;
import com.scichart.examples.R;
import com.scichart.examples.data.DoubleSeries;
import com.scichart.examples.data.RandomWalkGenerator;
import com.scichart.examples.fragments.base.ExampleBaseFragment;

import java.util.Collections;

import butterknife.BindView;

public class CustomizationCursorModifierTooltipsFragment extends ExampleBaseFragment {
    private static final int POINTS_COUNT = 200;

    @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().build();
        final IAxis yAxis = sciChartBuilder.newNumericAxis().build();

        final RandomWalkGenerator randomWalkGenerator = new RandomWalkGenerator();

        final DoubleSeries data1 = randomWalkGenerator.getRandomWalkSeries(POINTS_COUNT);
        randomWalkGenerator.reset();
        final DoubleSeries data2 = randomWalkGenerator.getRandomWalkSeries(POINTS_COUNT);

        final XyDataSeries<Double, Double> ds1 = sciChartBuilder.newXyDataSeries(Double.class, Double.class).withSeriesName("Series #1").build();
        final XyDataSeries<Double, Double> ds2 = sciChartBuilder.newXyDataSeries(Double.class, Double.class).withSeriesName("Series #2").build();

        ds1.append(data1.xValues, data1.yValues);
        ds2.append(data2.xValues, data2.yValues);

        final FastLineRenderableSeries lineRs1 = sciChartBuilder.newLineSeries().withDataSeries(ds1).withSeriesInfoProvider(new CustomSeriesInfoProvider()).withStrokeStyle(0xff6495ed, 2, true).build();
        final FastLineRenderableSeries lineRs2 = sciChartBuilder.newLineSeries().withDataSeries(ds2).withSeriesInfoProvider(new CustomSeriesInfoProvider()).withStrokeStyle(0xffe2460c, 2, true).build();

        final CursorModifier cursorModifier = new CursorModifier(R.layout.example_custom_cursor_modifier_tooltip_container);

        UpdateSuspender.using(surface, new Runnable() {
            @Override
            public void run() {
                Collections.addAll(surface.getXAxes(), xAxis);
                Collections.addAll(surface.getYAxes(), yAxis);
                Collections.addAll(surface.getRenderableSeries(), lineRs1, lineRs2);
                Collections.addAll(surface.getChartModifiers(), cursorModifier);

                final DisplayMetrics displayMetrics = getActivity().getResources().getDisplayMetrics();
                final float thickness = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 2f, displayMetrics);
                new SolidPenStyle(0xAAFFA500, false, thickness, null).initPaint(cursorModifier.getCrosshairPaint());

                sciChartBuilder.newAnimator(lineRs1).withSweepTransformation().withInterpolator(new DecelerateInterpolator()).withDuration(3000).withStartDelay(350).start();
                sciChartBuilder.newAnimator(lineRs2).withSweepTransformation().withInterpolator(new DecelerateInterpolator()).withDuration(3000).withStartDelay(350).start();
            }
        });
    }

    private static class CustomSeriesInfoProvider extends DefaultXySeriesInfoProvider {
        @Override
        protected ISeriesTooltip getSeriesTooltipInternal(Context context, XySeriesInfo<?> seriesInfo, Class<?> modifierType) {
            if (modifierType == CursorModifier.class) {
                return new CustomXySeriesTooltip(context, seriesInfo);
            } else {
                return super.getSeriesTooltipInternal(context, seriesInfo, modifierType);
            }
        }

        private static class CustomXySeriesTooltip extends XySeriesTooltip {
            public CustomXySeriesTooltip(Context context, XySeriesInfo seriesInfo) {
                super(context, seriesInfo);

                final DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
                final int padding = Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 1f, displayMetrics));
                this.setPadding(padding, padding, padding, padding);
            }

            @Override
            protected void internalUpdate(XySeriesInfo seriesInfo) {
                final SpannableStringBuilder sb = new SpannableStringBuilder();

                if (seriesInfo.seriesName != null) {
                    sb.append(seriesInfo.seriesName).append(" - ");
                }

                sb.append("X: ").append(seriesInfo.getFormattedXValue());
                sb.append(" Y: ").append(seriesInfo.getFormattedYValue());
                setText(sb);

                setTooltipBackgroundColor(0xff6495ed);
                setTooltipStroke(0xff4d81dd);
                setTooltipTextColor(ColorUtil.White);
            }
        }
    }
}

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