[Qgis-developer] New MapTool(Rotate Features)

[vinayan]

Hi all,

I have created a new MapTool(c++) for rotating multiple selected 
features interactively using mouse 
movement(https://github.com/qgis/Quantum-GIS/pull/376).

Normal Usage:
Select features on map.
Press mouse and drag to rotate about the selected features' 
bounding-box's center.

Advanced Usage:

User can decide which point should be the anchor point to rotate about. 
A cross appears on the center of bounding-box of selected features by 
default. Hold "Control" key and move mouse(no pressing) to move this 
cross to the desired anchor position. Release "Control" key to fix the 
anchor. Now press and drag mouse to rotate about this new anchor.


A very special thanks to Nathan Woodrow for his support on irc channel. 
I had really messed my branching/commits big time and his help was very 
important.

Thanks
Vinayan