Performing zoom and rotation at the same time is inconvenient because
most of the time the user will want either zoom or rotation. This can be
solved by recognizing a "significant enough" zoom or rotation change
initiated by the gesture recognizer and then ignoring the other gesture.
...in "alt-pressed" mode
Menu activation doesn't cause a focus-out becaus menu keyboard
grabbing is implemented with a simple gtk_grab_add() (the menu popup
never gets the focus). Therefore, the canvas never gets a focus-out
event and the pressed modifiers are stuck.
Fixed by connecting to "grab-notify" on the canvas, and artificially
releasing all modifiers when the canvas is shadowed by a grab.
- start_stroke()/finih_stroke() -> begin_stroke()/end_stroke()
- process_event_queue() -> process_stroke()
- GimpMotionBuffer::motion() -> GimpMotionBuffer::stroke()
- add GimpMotionBuffer::hover() and process_hover()
- remove push_event_history() and pop_event_queue() from API
The thing works like this:
- Motion events are continuously fed into the buffer using motion_event()
- begin_stroke()/end_stroke() correspond to BUTTON_PRESS/BUTTON_RELEASE,
the period between them is a "stroke"
- If motion_event() returns TRUE, we request "stroke" signals by calling
process_stroke() and "hover" signals by calling process_hover()
and emit the buffer's "motion" signal when a motion is supposed
to happen. In GimpDisplayShell, connect to GimpMotionBuffer::motion()
and call the tool.
Povilas Kanapickas