AxisTrace is not erased after showing a tooltip

[lfkpoa]

Hi,

I would like to enable a crosshair that changes with the mouse and not only when the chart is clicked.
The simplest way seems to be to use HorizontalAxisTrace and VerticalAxisTrace.
It works fine until a tooltip is shown.
In that case the last trace drawn is not removed.
Seems like a bug in the paint strategy used by JFreeChart.

It would be nice also to have a tick label drawn exactly at the crosshair value for each axis (following the mouse), using a background colour.
Is there a simple way to do this?
Any suggestion how to get started?

With regards,

Luis Fernando

[barbarius]

is there an "AxisTrace" class in JFC?

[lfkpoa]

It's not a class but rather two different boolean properties of ChartPanel:

Code: Select all

    /** A flag that controls whether or not horizontal tracing is enabled. */
    private boolean horizontalAxisTrace = false;

    /** A flag that controls whether or not vertical tracing is enabled. */
    private boolean verticalAxisTrace = false;

I wrote just AxisTrace to mean both properties for a shorter subject.