* Use target_include_directories to specify include paths
* Specify project root (parent of rtgui and rtengine) as include path
* Replace relative includes with normal includes
Accumulate/coalesce GDK_SCROLL_SMOOTH events until we equal or exceed +/-1.0
This avoids having one zoom adjustment for every single event which makes touchpad zooming unusable due to frequent
small deltas
This makes trackpad zooming usable while having no effect on mice that emit GDK_SMOOTH_SCROLL with values of +/-1.0 instead
of GDK_SCROLL_UP and GDK_SCROLL_DOWN
If any mice exist that have scroll wheel detents but emit smaller values per detent, this may have the negative effect of
requiring multiple detents per zoom level. It remains to be seen whether any mice behave like this. The discrete step
implementation of zoomSteps requires us to coalesce events instead of smoothly zooming in and out.
- fix regression in image quality for the previous zoom levels
- ignore the finer-grained zoom levels when zooming manually (either with the
scroll wheel or with the buttons), but use them only only for zoom to fit
- Now the Preview can show free space around the image (the image's
corner will coincide with the center of the preview area)
- Editing objects can now be manipulated in this free space
- The editing mechanism has been split : it was completely handled in
rtengine before, now rtengine still handle the pipette's data provider,
but rtgui now handle the objects data provider.
- Bugfix: when using coarse rotate in the Editor panel, the Gradient
widgets are now correctly displayed
