Warning, /office/calligra/plugins/spacenavigator/IDEAS is written in an unsupported language. File is not indexed.

 ideas from a discussion with wind-rider on #calligra:
 
 The space navigator is very good for just navigating around in your
 document (e.g. panning and zooming). But we also want to have support
 for it inside the tools so we can for instance scale, move and rotate shapes, 
 change the size of a brush, etc.
 So we have to decide based on the actual working context where to
 send the device events so that the right things happens.
 Thats means if the user is currently working on a specific aspect of
 the document, we should not pan/zoom the document by accident. This can
 be achieved by using a keyboard modifier or a device button to switch 
 between document and tool context.
 Another problem is that the space navigator reports both position and
 rotation changes in a single event. It would maybe be better to check the
 most significant part of the event and only use that for the action to be
 carried out. An example for tha twould probably be the default tool where 
 we can rotate, scale and move the currently selected shapes. We certainly
 don't want to rotate, scale and move at the same time. So we have to decide
 which action we want to carry out. Hopefully we can decide that based on 
 the position/rotation values. If that is not enough we have to use other
 means to switch between those actions.