CODEWITHSUNDEEP
jfreechart
Sudipto Shome
Sudipto Shome

Reputation: 105

JfreeChart: Color change on Mouse click event

I am writing an application that uses Jfreechart to plot a simple bar chart, this chart needs to respond to mouse clicks from the user. I would like to change the color of the bar that is clicked on by the user. I know that the event will be a ChartMouseEvent that will be handled by the ChartMouseListener but I am a little confused about how to change the color of the ChartEntity once I have received it from the event.

Any help would be much appreciated.

Upvotes: 1

Views: 1210

Answers (1)

trashgod
trashgod

Reputation: 205785

You can change the color of an individual bar by overriding the renderer's getItemPaint(), as shown here and here for other renderer's. Once you receive a ChartEntity of type CategoryItemEntity, you can determine which dataset, series, and bar was clicked. Then you can condition your custom renderer's to apply the desired color with the next repaint().

Alternatively, display each series and color in a JTable and use JColorChooser to select colors, as shown in How to Use Tables.

Upvotes: 3

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