mouse rotation for fltk backend

[Kai Habel]

Dear all,

I have prepared a changeset which enables rotation of 3D(2D)-plots for
the fltk backend. To switch between pan and rotation respectively I have
added two buttons (P and R). It works very similar to the analog matlab
function.

To make it fully usable I have removed the zooming and panning limits in
axes::properties::zoom_about_point and axes::properties::translate_view.
Was there a specific reason to introduce them?

Kai

mouse_rot.diff
Description: Text Data