MPAndroidChart图形联动

原理

实现

添加事件处理的类

package ……;

import android.graphics.Matrix;

import android.util.Log;

import android.view.MotionEvent;

import android.view.View;

import com.github.mikephil.charting.charts.BarLineChartBase;

import com.github.mikephil.charting.charts.Chart;

import com.github.mikephil.charting.highlight.Highlight;

import com.github.mikephil.charting.listener.ChartTouchListener;

import com.github.mikephil.charting.listener.OnChartGestureListener;

/**

 * Created by Android on 2015/12/10.

 */

public class CoupleChartGestureListener  implements OnChartGestureListener {

    private Chart srcChart;

    private Chart[] dstCharts;

    public CoupleChartGestureListener(Chart srcChart, Chart[] dstCharts) {

        this.srcChart = srcChart;

        this.dstCharts = dstCharts;

    }

    @Override

    public void onChartGestureStart(MotionEvent me, ChartTouchListener.ChartGesture lastPerformedGesture) {

    }

    @Override

    public void onChartGestureEnd(MotionEvent me, ChartTouchListener.ChartGesture lastPerformedGesture) {

    }

    @Override

    public void onChartLongPressed(MotionEvent me) {

    }

    @Override

    public void onChartDoubleTapped(MotionEvent me) {

    }

    @Override

    public void onChartSingleTapped(MotionEvent me) {

        for (Chart dstChart : dstCharts) {

            if (dstChart.getVisibility() == View.VISIBLE) {

                Highlight h = ((BarLineChartBase)dstChart).getHighlightByTouchPoint(me.getX(), me.getY());

                ((BarLineChartBase)dstChart).highlightTouch(h);

            }

        }

    }

    @Override

    public void onChartFling(MotionEvent me1, MotionEvent me2, float velocityX, float velocityY) {

    }

    @Override

    public void onChartScale(MotionEvent me, float scaleX, float scaleY) {

        syncCharts();

    }

    @Override

    public void onChartTranslate(MotionEvent me, float dX, float dY) {

        syncCharts();

    }

    public void syncCharts() {

        Matrix srcMatrix;

        float[] srcVals = new float[9];

        Matrix dstMatrix;

        float[] dstVals = new float[9];

        // get src chart translation matrix:

        srcMatrix = srcChart.getViewPortHandler().getMatrixTouch();

        srcMatrix.getValues(srcVals);

        // apply X axis scaling and position to dst charts:

        for (Chart dstChart : dstCharts) {

            if (dstChart.getVisibility() == View.VISIBLE) {

                dstMatrix = dstChart.getViewPortHandler().getMatrixTouch();

                dstMatrix.getValues(dstVals);

                dstVals[Matrix.MSCALE_X] = srcVals[Matrix.MSCALE_X];

                dstVals[Matrix.MTRANS_X] = srcVals[Matrix.MTRANS_X];

                dstMatrix.setValues(dstVals);

                dstChart.getViewPortHandler().refresh(dstMatrix, dstChart, true);

            }

        }

    }

}

事件传递

// 获取K线控件

KLineChart mKLine = (KLineChart) findViewById(R.id.kLineView);

// 获取交易量控件

TradingVolumeChart mTradingVolumeView = (TradingVolumeChart) findViewById(R.id.tradingVolumeView);

// 将K线控的滑动事件传递给交易量控件

mKLine.setOnChartGestureListener(new CoupleChartGestureListener(mKLine, new Chart[]{mTradingVolumeView}));

// 将交易量控件的滑动事件传递给K线控件

mTradingVolumeView.setOnChartGestureListener(new CoupleChartGestureListener(mTradingVolumeView, new Chart[]{mKLine}));