app: PlaybackController + playhead subscription migration (issues 0c, 1-4)

New app/playback/playbackcontroller.{h,cpp}: a lazily created
process-wide singleton whose set_playhead() forwards to
oakengine_viewer_set_playhead and re-broadcasts playhead_changed as a
plain Qt signal. Every app-side oakengine_viewer_set_playhead call site
(17 across viewer, timelinewidget, timelineview, import tool,
timebasedwidget, keyframecontrol, export dialog, mainwindow) now goes
through it.

Migrate the first four playhead subscribers off the raw C event
subscription / EngineEventBridge to the controller signal:
- TimeBasedView (issue 1)
- NodeParamViewWidgetBridge (issue 2)
- NodeParamViewKeyframeControl (issue 3)
- NodeParamViewConnectedLabel (issue 4)

Each stores a QMetaObject::Connection filtered on its viewer node and
disconnects on teardown; the viewer_sub_ members are gone. Plan docs
mark issues 0c and 1-4 as done.

Closes #30, closes #31, closes #32, closes #51, closes #52.

This commit is contained in:

Mike-Solar

2026-08-05 00:01:12 +08:00

parent 712badbaa7

commit b77344b506

20 changed files with 184 additions and 101 deletions

									
										app/widget/timebased/timebasedview.h
									
		+1
		-1
	
												View File
												
				@@ -148,7 +148,7 @@ private:

					OakEngineNode *viewer_;

					int64_t viewer_sub_ = 0;

					QMetaObject::Connection viewer_conn_;

				};

				}