This reverts commit 134e927965.
Writing into const event is very bad,
but this change broke compositor manipulators.
Will look into better solution eventually.
Mostly internal changes, keeping both manipulators
could have worked but there was no point long term.
There are still some glitches to resolve, will work on those next.
A single manipulator could only assign a single operator to each part.
Now each part can have it's own.
Also modify 2D selection callback, 2D started at 1, 3D at 0.
Now use -1 for unset value, start both at 0.
Some manipulators are used like on-screen buttons,
in this case it doesn't make sense to keep track of their state,
so zero the offset when its unused.
Needed for lamp-target manipulator.
Re-use operator return flags for manipulator modal & invoke,
this means manipulators can allow navigation or other events to be
handled as they run - see T52499
- WM_manipulatorgrouptype_remove- > free
- WM_manipulator_group -> WM_manipulator_group_type
Naming here is still a bit confusing,
now at least free/remove are differentiated.
2.8x branch added bContext arg in many places,
pass eval-context instead since its not simple to reason about what
what nested functions do when they can access and change almost anything.
Also use const to prevent unexpected modifications.
This fixes crash loading files with shadows,
since off-screen buffers use a NULL context for rendering.
Was complicating general use case, also support for transforming with matrix_space set.
Add matrix_space support for manipulator_window_project_2d too.
Also internal changes so arrow3d matches grab3d's behavior.
Needed to add WM_MANIPULATOR_DRAW_OFFSET_SCALE flag so
we can optionally apply offset in worldspace or screen scaled values.
Render-border & crop-node 2d-cage manipulators where unreasonably
complicated to implement because there was no good way to define
the sub-region the manipulator was transforming in
(render border within the camera's frame for example).
Add matrix-space variable,
remove scale property from cage2d manipulator, use matrix instead.
Running undo would notify manipulators to refresh,
but this still allowed for events in the queue to be handled,
where manipulators could be drawn for selection before
their refresh callback runs.
This made Python manipulators raise exceptions
about referencing invalid data (or crash).
Now tag manipulator update on file load (including undo)
and ensure the refresh callback runs
before drawing manipulator selection.
Also split manipulator map refresh flag in two since selection doesn't
perform the same operations as regular drawing.
Was doing 2x lookups which is OK for click-select
but this runs on mouse-move and can become slow.
May enable this again if highlighting logic changes.
Also scale hotspot by pixelsize.
