I would like the vertical cursor to appear where I touch the area of the chart. the textual representation associated with this line will display the value of the bar, the value of the y axis of the point in it. and when I move my finger left-right while holding my finger [left or right movement], this vertical cursor then moves accordingly, and the text view also follows, but displays the value of the Y axis to the new location (s) as it moves.
I see that GraphicalView has a touch list that I can register to receive callbacks - but I don’t know how to use it from now on. I also manage to associate touchevent with some kind of gesture maker. But how to draw a vertical cursor line that overlays on top of the current chart?
Another problem that I am facing is that in the onTuuch method when returning true I cannot get the values mChart.getCurrentSeriesAndPoint (); always return Null, but if I change the return value to False, I can get the values, but I can not access ontuch again.
This is my code.
mChart.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_CANCEL) {
dataset.removeSeries(dataset.getSeriesCount()-1);
multiRenderer.removeSeriesRenderer(GraficaCuatro);
}
if (event.getAction() == MotionEvent.ACTION_DOWN) {
multiRenderer.setPanEnabled(false);
multiRenderer.setZoomEnabled(false);
SeriesSelection seriesSelection = mChart.getCurrentSeriesAndPoint();
if(seriesSelection != null)
{
Toast.makeText(
getActivity().getBaseContext(),"Hola",
Toast.LENGTH_SHORT).show();
}
XYSeries Line = new XYSeries("");
Line.add(event.getX()/1.5,minValue);
Line.add(event.getX()/1.5,maxValue);
dataset.addSeries(Line);
multiRenderer.addSeriesRenderer(GraficaCuatro);
}
if (event.getAction() == MotionEvent.ACTION_MOVE) {
dataset.removeSeries(dataset.getSeriesCount()-1);
multiRenderer.removeSeriesRenderer(GraficaCuatro);
XYSeries Line = new XYSeries("");
Line.add(event.getX()/1.5,minValue);
Line.add(event.getX()/1.5,maxValue);
dataset.addSeries(Line);
multiRenderer.addSeriesRenderer(GraficaCuatro);
}
if (event.getAction() == MotionEvent.ACTION_UP) {
dataset.removeSeries(dataset.getSeriesCount()-1);
multiRenderer.removeSeriesRenderer(GraficaCuatro);
}
mChart.repaint();
return true;
}
});
I would definitely like that.
(source: subirimagenes.com )
Please, I need help!
: onTouch, True; onTouch toRealPoint(); SeriesSelection , true false, .
mChart.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
SeriesSelection seriesSelection = mChart.getCurrentSeriesAndPoint();
double[]values = mChart.toRealPoint(0);
if(seriesSelection != null)
{
if (event.getAction() == MotionEvent.ACTION_CANCEL) {
dataset.removeSeries(dataset.getSeriesCount()-1);
multiRenderer.removeSeriesRenderer(GraficaCuatro);
}
if (event.getAction() == MotionEvent.ACTION_DOWN) {
XYSeries Line = new XYSeries("");
Line.add(seriesSelection.getXValue(),minValue);
Line.add(seriesSelection.getXValue(),maxValue);
dataset.addSeries(Line);
multiRenderer.addSeriesRenderer(GraficaCuatro);
}
if (event.getAction() == MotionEvent.ACTION_MOVE) {
dataset.removeSeries(dataset.getSeriesCount()-1);
multiRenderer.removeSeriesRenderer(GraficaCuatro);
XYSeries Line = new XYSeries("");
Line.add(seriesSelection.getXValue(),minValue);
Line.add(seriesSelection.getXValue(),maxValue);
dataset.addSeries(Line);
multiRenderer.addSeriesRenderer(GraficaCuatro);
}
if (event.getAction() == MotionEvent.ACTION_UP) {
dataset.removeSeries(dataset.getSeriesCount()-1);
multiRenderer.removeSeriesRenderer(GraficaCuatro);
}
}
mChart.repaint();
return true;
}
});