[GRASS-dev] grass7 wxgui zoom out not centred on mouse position

[Markus Metz]

In grass7 when zooming out the new display is not centred on the mouse 
position, but on the mirror-position of the mouse position e.g. west is 
not current[0] but current[0] - self.Map.width
I find this confusing, but maybe this is a matter of taste.

The Zoom function is in gui/wxpython/gui_modules/mapdisp_window.py
replacing lines 2231 - 2235 with
                newreg['w'], newreg['n'] = self.Pixel2Cell((x1 - 
self.Map.width * 0.75, \
                                                                y1 - 
self.Map.height * 0.75))
                newreg['e'], newreg['s'] = self.Pixel2Cell((x2 + 
self.Map.width * 0.75, \
                                                                y2 + 
self.Map.height * 0.75))

works for me, the zoomed out display is centred on the previous mouse 
position with zoom factor 2 or the centre of the box drawn when using 
the zoom out button.

Markus M