android - Sync the two mpandroidcharts graphs dragging and zomming -

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i using mpandroidchart , have requirement have sync dragging , zooming of 2 graphs, if zoom out, zoom in or drag 1 of 1 graph other graph should zoomed out, zoomed in or dragged same extent on x-axis. example: if drag upper graph 12th point on x-axis lower graph should dragged 12th point on x-axis automatically.

mygraphs

guys need need idea how this, enough familiar mpchartandroid library.

i wrote function this, calling function of drag , scale listener. working perfectly. 

private void synccharts(chart mainchart, linechart[] othercharts) {         matrix mainmatrix;         float[] mainvals = new float[9];         matrix othermatrix;         float[] othervals = new float[9];         mainmatrix = mainchart.getviewporthandler().getmatrixtouch();         mainmatrix.getvalues(mainvals);           (linechart tempchart : othercharts) {              othermatrix = tempchart.getviewporthandler().getmatrixtouch();             othermatrix.getvalues(othervals);             othervals[matrix.mscale_x] = mainvals[matrix.mscale_x];             othervals[matrix.mtrans_x] = mainvals[matrix.mtrans_x];             othervals[matrix.mskew_x] = mainvals[matrix.mskew_x];             othermatrix.setvalues(othervals);             tempchart.getviewporthandler().refresh(othermatrix, tempchart, true);          }     }

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