AChartEngine, getting values of plots on click
I used achartengine for coding a simple time chart. What I want to do is get the values that are alre开发者_StackOverflow中文版ady plotted by clicking on the point on the graph, is this possible?
Assuming that mChartView is your GraphicalView:
mChartView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();
double[] xy = mChartView.toRealPoint(0);
if (seriesSelection == null) {
Toast.makeText(GraficoMensile.this, "No chart element was clicked", Toast.LENGTH_SHORT)
.show();
} else {
Toast.makeText(
GraficoMensile.this,
"Chart element in series index " + seriesSelection.getSeriesIndex()
+ " data point index " + seriesSelection.getPointIndex() + " was clicked"
+ " closest point value X=" + seriesSelection.getXValue() + ", Y=" + seriesSelection.getValue()
+ " clicked point value X=" + (float) xy[0] + ", Y=" + (float) xy[1], Toast.LENGTH_SHORT).show();
}
}
});
source: http://code.google.com/p/achartengine/source/browse/trunk/achartengine/demo/org/achartengine/chartdemo/demo/chart/XYChartBuilder.java
精彩评论