made timeline in/out toggleable

project/sequence.cpp

@@ -8,6 +8,7 @@
 Sequence::Sequence() :
 	playhead(0),
 	using_workarea(false),
+    enable_workarea(true),
 	workarea_in(0),
 	workarea_out(0),
 	wrapper_sequence(false)

project/sequence.h

@@ -28,6 +28,7 @@ struct Sequence {
 	long playhead;
 
 	bool using_workarea;
+    bool enable_workarea;
 	long workarea_in;
 	long workarea_out;
 

project/undo.cpp

@@ -209,6 +209,7 @@ SetTimelineInOutCommand::SetTimelineInOutCommand(Sequence *s, bool enabled, long
 
 void SetTimelineInOutCommand::undo() {
 	seq->using_workarea = old_enabled;
+    seq->enable_workarea = old_workarea_enabled;
 	seq->workarea_in = old_in;
 	seq->workarea_out = old_out;
 
@@ -225,9 +226,11 @@ void SetTimelineInOutCommand::undo() {
 
 void SetTimelineInOutCommand::redo() {
 	old_enabled = seq->using_workarea;
+    old_workarea_enabled = seq->enable_workarea;
 	old_in = seq->workarea_in;
 	old_out = seq->workarea_out;
 
+    if (!seq->using_workarea) seq->enable_workarea = true;
 	seq->using_workarea = new_enabled;
 	seq->workarea_in = new_in;
 	seq->workarea_out = new_out;

project/undo.h

@@ -174,6 +174,8 @@ public:
 private:
 	Sequence* seq;
 
+    bool old_workarea_enabled;
+
 	bool old_enabled;
 	long old_in;
 	long old_out;