Adding tooltips to YIntervalRenderer

[bevis]

I'm using a YIntervalRenderer and would like to enable tooltips on the high & low points.
I gather that they have not been implemented for this renderer, so I've been trying to work out how to do it, but am having difficulties understanding the process.
Following the logic in createScatterPlot(), I set up my renderer as:

YIntervalRenderer renderer = new YIntervalRenderer();
renderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator());

but it seems I need more than that. Looking at XYLineAndShapeRenderer as an example I can't see what I'm missing?

[paradoxoff]

After checking the source, I think that this is a bug in the YIntervalRenderer class. The class is using the bounds of the line between the minimum and maximum y value as hot spot in which eventual mouse events are captured.
Since the bounds will be a mathematical line with either a height or a width of zero, the mouse can never really be within the bounds of the hot spot.
To fix that, you could try to change the line 242 (I am referring to the current JFreeChart version) of YIntervalRenderer and replace

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addEntity(entities, line.getBounds(), dataset, series, item, 0.0,

with

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addEntity(entities, ShapeUtilities.createLineRegion(line,4.0f), dataset, series, item, 0.0,

I you have still trouble to hit the entity with the mouse, just use a larger value than 4.0f.

[bevis]

That worked, thanks very much!

[david.gilbert]

I committed this fix for inclusion in the upcoming 1.0.20 release.