MPAndroidChart图形联动

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}));