CLICK in a categoryplot

[anibanm]

Hello,
I have a LineChart. When I click in a point in chart I'd like to get its category.

I've achieved my aim in a XYPlot with the following code:

Code: Select all

public void chartProgress(ChartProgressEvent event) {
            if (event.getType() != ChartProgressEvent.DRAWING_FINISHED)  {
                return;
            }
             if (this.panel != null) {
                JFreeChart c = this.panel.getChart();                
                if (c != null) {
                    XYPlot plot = (XYPlot) c.getPlot();
                    XYDataset dataset = plot.getDataset();
                    double xx = plot.getDomainCrosshairValue(); 
                    int itemIndex=this.series.indexOf(xx);
                    this.table.changeSelection(itemIndex,0,false,false);
                    
                    }   
                }
            }

double xx = plot.getDomainCrosshairValue();



But I don't know how doig it in a LineChart(CategoryPlot).

I need your help, thank's.

[david.gilbert]

It depends on whether you mean a click on a data point or a click on any point in the chart. In the former case, the ChartMouseEvent will have a CategoryItemEntity that you can inspect. In the latter case, you'll need to take the mouse coordinates relative to the chart's data area, and then use the CategoryAxis and dataset to try to derive which category contains the click point (I haven't done this myself - it's definitely possible, but not straightforward).

[anibanm]

OK, now it's fine.

Thank's a lot.