Fix indentation.

[ardour.git] / gtk2_ardour / midi_streamview.cc

diff --git a/gtk2_ardour/midi_streamview.cc b/gtk2_ardour/midi_streamview.cc
index b79a6dc6d0a61940f533bb5b80b8df69f959592f..fd3d5383aa55f25445f583fd60bac4c9e10e4fd2 100644 (file)
--- a/gtk2_ardour/midi_streamview.cc
+++ b/gtk2_ardour/midi_streamview.cc
@@ -65,6 +65,7 @@ MidiStreamView::MidiStreamView (MidiTimeAxisView& tv)
        , _data_note_min(60)
        , _data_note_max(71)
         , _note_lines (0)
+       , _updates_suspended (false)
 {
        /* use a group dedicated to MIDI underlays. Audio underlays are not in this group. */
        midi_underlay_group = new ArdourCanvas::Group (*_canvas_group);
@@ -310,7 +311,7 @@ MidiStreamView::update_contents_height ()
 void
 MidiStreamView::draw_note_lines()
 {
-        if (!_note_lines) {
+        if (!_note_lines || _updates_suspended) {
                 return;
         }
 
@@ -371,7 +372,7 @@ MidiStreamView::apply_note_range(uint8_t lowest, uint8_t highest, bool to_region
 {
        _highest_note = highest;
        _lowest_note = lowest;
-       
+
        int const range = _highest_note - _lowest_note;  
        int const pixels_per_note = floor (child_height () / range);
        
@@ -405,12 +406,20 @@ MidiStreamView::apply_note_range(uint8_t lowest, uint8_t highest, bool to_region
        draw_note_lines();
 
        if (to_region_views) {
+               apply_note_range_to_regions ();
+       }
+       
+       NoteRangeChanged();
+}
+
+void
+MidiStreamView::apply_note_range_to_regions ()
+{
+       if (!_updates_suspended) {
                for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
                        ((MidiRegionView*)(*i))->apply_note_range(_lowest_note, _highest_note);
                }
        }
-
-       NoteRangeChanged();
 }
 
 void
@@ -649,3 +658,24 @@ MidiStreamView::y_to_note (double y) const
        
        return n;
 }
+
+/** Suspend updates to the regions' note ranges and our
+ *  note lines until resume_updates() is called.
+ */
+void
+MidiStreamView::suspend_updates ()
+{
+       _updates_suspended = true;
+}
+
+/** Resume updates to region note ranges and note lines,
+ *  and update them now.
+ */
+void
+MidiStreamView::resume_updates ()
+{
+       _updates_suspended = false;
+
+       draw_note_lines ();
+       apply_note_range_to_regions ();
+}