CODEWITHSUNDEEP
javaswingtooltipjfreechart
Tom
Tom

Reputation: 1385

Java JFreeChart: customize tooltip screen position

I implemented my own JFreeChart XYToolTipGenerator and, as the chart it is used on is almost full screen, sometimes the tooltip position (on screen) hides the point it is related to (e.g. in the bottom right corner, since it seems that tooltip is configured to be positioned South-East of the mouse / data point). This is a problem because the user needs to be able to click on the chart's data points (as it generates a specific action).

Is there a way to either define dynamically the position of the tooltip (e.g. for data points bottom right I would ask the tooltip to be shown North-West) or, alternatively, to define a systematic position (e.g. North-West instead of South-East as it is by default)?

This problem has given me headaches for the last few days - any help or hint is more than welcome.

Many thanks! Thomas

Upvotes: 1

Views: 581

Answers (1)

David Gilbert
David Gilbert

Reputation: 4477

Here's the answer I posted on the JFreeChart forum:

JFreeChart is using the standard Swing tool tip mechanism. In the ChartPanel class, the getToolTipText(mouseEvent) method is overridden to return the appropriate text for the tooltip, and that's it.

Swing also gives you the option to override the getToolTipLocation(mouseEvent) method, and that's probably what you need here.

Upvotes: 2

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