Blender Git Loki

Fix compiler warning from changing some types

Code cleanup: Port flags for bGPdata to a enum

Support for jumping between Grease Pencil keyframes

* Added support for jumping between Grease Pencil keyframes (for the currently
visible context).

* Also added support for showing Grease Pencil keyframes in the timeline,
though this doesn't currently work because of context issues. We need to find
a way around not being able to know what other views are showing GP data
(e.g. maybe default to only showing stuff for 3D views, since that's the primary
usecase for animation-type work)?

Added back toggle in Clip Editor to set where the datablock gets attached

Put in place defines for not showing GP onionskins when animating

Added some defnies which will hide GP onionskins when animation playback is running.
These don't work yet though as there's no way to access that information from
the drawing callbacks which call the GP drawing code.

Deselecting GP strokes deselects them for all frames and all (editable) layers

Bugfix: Sequencer properties panel doesn't update when new Grease Pencil data is added

Bugfix: Sequencer Preview doesn't update when stroke selection changes

Grease Pencil layers in the DopeSheet now show interactive color swatches beside the layer name now

Updated "Frame" menu to show all the operators which work for Grease Pencil mode

Code Cleanup: Make it easier to reuse code for drawing settings of GP Layers

Code Cleanup: Split onion skinning drawing code out into its own function

Merge branch 'master' into GPencil_EditStrokes

Code cleanup: Generate error messages instead of failing silently

GP DopeSheet: It is now possible to set keyframe types for Grease Pencil frames

Use the R-key shortcut as for normal keyframes

GP Onion Skinning: Custom before/after colours and ranges

It is now possible to set different colors for ghosts "before" and "after" the
current frame, and to separately control how many are displayed on each side.

To use custom colors, it is necessary to firstly toggle the color-wheel icon-toggle
(located beside the Onion Skinning) checkbox. This will make both before and after
strokes get drawn using custom colors. I tried having separate toggles, but that
was too clumsy.


TODO:
* Some version-patching code will be needed to initialise the colours and fields
so that they work when loading old files. I've reused the old field for the
"before" range, so that at least something will be usable there.
* Some code cleanup is in order to make this code a bit nicer

Made the threshold for selecting individual stroke verts more sensitive

That is, a wider around the cursor is now used when checking for matching verts,
which should make it easier to successfully select verts.

Tweaks to GPencil keymaps again

* D RMB works as Eraser again. D Ctrl RMB was a bit too clumsy to remember
for doing this
* D Shift RMB is now the only remaining keymap for selecting stroke verts.
I've modified this so that it now properly toggles selections (while maintaining
previous selections too - it's trivial to change this behaviour in the operator
properties panel afterwards if you don't want that). This probably works well
enough as the only direct selection operator now?

Merge branch 'master' into GPencil_EditStrokes

Conflicts:
release/scripts/startup/bl_ui/space_view3d_toolbar.py

CMake Build Fix: Forgot to add gpencil_select.c to cmake files