[jfreechart-dev] Solution Approach for BUG ID: 3358964

[Robert K. <d4m...@go...>]

Hello,

 We are two Computer Science students who would like to participate in the
JFreeChart Project in the scope of a Software Engineering lecture. We have
already attempted to contact the main developer of the project David
Gilbert via e-mail, but haven't received any reply yet. Nevertheless we
have selected the issue with the ID: 3358964 to work on and started
analysing the source.

 The user wants the possibility to zoom by drawing a zoom rectangle not
just from the top-left corner to the bottom-right corner, but also any
other way.

 At the moment zooming with rectangles works as follows:

 If the rectangle is drawn from top left to bottom right, the rectangle
will be drawn properly and the chart will be zoomed into accordingly. When
trying to draw a rectangle any other way, the rectangle will not be drawn
and upon releasing the mouse button, the chart will be zoomed out to the
full view instead.

 Changing that behaviour, so that drawing a zoom rectangle is possible in
any way, will make it easier to zoom into the top left corner of the chart
for example, as stated in the bug report, but zooming out will then only be
possible by right clicking and selecting the appropiate option from the
popup menu. We think that is benificial to make this change and we are
confident, that we can implement it, since we have already identified the
effected class (ChartPanel) and methods (mouseDragged, mouseReleased),
where changes would be necessary.

 Regards,

David Breßler & Robert Kriehs.