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Allow new idle visual changer calls to be requested while

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the current changer is executing; fixes #4567.


git-svn-id: svn://localhost/ardour2/branches/3.0@12934 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Carl Hetherington 2012-06-26 00:07:45 +00:00
parent cc9ed077be
commit 098f0157df
2 changed files with 24 additions and 4 deletions
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23
gtk2_ardour/editor.cc
View File

@ -4241,6 +4241,18 @@ Editor::_idle_visual_changer (void* arg)
int
Editor::idle_visual_changer ()
{
/* set_horizontal_position() below (and maybe other calls) call
gtk_main_iteration(), so it's possible that a signal will be handled
half-way through this method. If this signal wants an
idle_visual_changer we must schedule another one after this one, so
mark the idle_handler_id as -1 here to allow that. Also make a note
that we are doing the visual change, so that changes in response to
super-rapid-screen-update can be dropped if we are still processing
the last one.
*/
pending_visual_change.idle_handler_id = -1;
pending_visual_change.being_handled = true;
VisualChange::Type p = pending_visual_change.pending;
pending_visual_change.pending = (VisualChange::Type) 0;
@ -4269,7 +4281,7 @@ Editor::idle_visual_changer ()
_summary->set_overlays_dirty ();
pending_visual_change.idle_handler_id = -1;
pending_visual_change.being_handled = false;
return 0; /* this is always a one-shot call */
}
@ -5191,7 +5203,14 @@ Editor::super_rapid_screen_update ()
if (!_stationary_playhead) {
if (!_dragging_playhead && _follow_playhead && _session->requested_return_frame() < 0) {
if (!_dragging_playhead && _follow_playhead && _session->requested_return_frame() < 0 && !pending_visual_change.being_handled) {
/* We only do this if we aren't already
handling a visual change (ie if
pending_visual_change.being_handled is
false) so that these requests don't stack
up there are too many of them to handle in
time.
*/
reset_x_origin_to_follow_playhead ();
}

5
gtk2_ardour/editor.h
View File

@ -1029,14 +1029,15 @@ class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARD
double y_origin;
int idle_handler_id;
/** true if we are currently in the idle handler */
bool being_handled;
VisualChange() : pending ((VisualChange::Type) 0), time_origin (0), frames_per_unit (0), idle_handler_id (-1) {}
VisualChange() : pending ((VisualChange::Type) 0), time_origin (0), frames_per_unit (0), idle_handler_id (-1), being_handled (false) {}
void add (Type t) {
pending = Type (pending | t);
}
};
VisualChange pending_visual_change;
static int _idle_visual_changer (void *arg);