Factor out region layering.

Correctly layer automation regions to match the stacking of their 'real' counterparts.


git-svn-id: svn://localhost/ardour2/branches/3.0@4585 d708f5d6-7413-0410-9779-e7cbd77b26cf

5 files changed, 79 insertions, 128 deletions

diff --git a/gtk2_ardour/audio_streamview.cc b/gtk2_ardour/audio_streamview.cc
index 4ea7269f40..320bc1f195 100644
--- a/gtk2_ardour/audio_streamview.cc
+++ b/gtk2_ardour/audio_streamview.cc
@@ -365,13 +365,16 @@ AudioStreamView::remove_crossfade (boost::shared_ptr<Region> r)
 void
 AudioStreamView::redisplay_diskstream ()
 {
-	list<RegionView *>::iterator i, tmp;
+	list<RegionView *>::iterator i;
 	list<CrossfadeView*>::iterator xi, tmpx;
 
+	// Flag region views as invalid and disable drawing
 	for (i = region_views.begin(); i != region_views.end(); ++i) {
 		(*i)->set_valid (false);
+		(*i)->enable_display (false);
 	}
 
+	// Flag crossfade views as invalid
 	for (xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
 		(*xi)->set_valid (false);
 		if ((*xi)->visible() && _layer_display != Stacked) {
@@ -379,6 +382,7 @@ AudioStreamView::redisplay_diskstream ()
 		}
 	}
 
+	// Add and display region and crossfade views, and flag them as valid
 	if (_trackview.is_audio_track()) {
 		_trackview.get_diskstream()->playlist()->foreach_region(
 				static_cast<StreamView*>(this),
@@ -389,53 +393,8 @@ AudioStreamView::redisplay_diskstream ()
 		if (apl)
 			apl->foreach_crossfade (this, &AudioStreamView::add_crossfade);
 	}
-
-	RegionViewList copy;
-
-	// Build a list of region views sorted by layer, and remove invalids
-	for (i = region_views.begin(); i != region_views.end(); ) {
-		tmp = i;
-		tmp++;
-
-		if (!(*i)->is_valid()) {
-			delete *i;
-			region_views.erase (i);
-			i = tmp;
-			continue;
-		} else {
-			(*i)->enable_display(true);
-		}
-
-		if (copy.size() == 0) {
-			copy.push_front((*i));
-			i = tmp;
-			continue;
-		}
-
-		RegionViewList::iterator k = copy.begin();
-		RegionViewList::iterator l = copy.end();
-		l--;
-
-		if ((*i)->region()->layer() <= (*k)->region()->layer()) {
-			copy.push_front((*i));
-			i = tmp;
-			continue;
-		} else if ((*i)->region()->layer() >= (*l)->region()->layer()) {
-			copy.push_back((*i));
-			i = tmp;
-			continue;
-		}
-
-		for (RegionViewList::iterator j = copy.begin(); j != copy.end(); ++j) {
-			if ((*j)->region()->layer() >= (*i)->region()->layer()) {
-				copy.insert(j, (*i));
-				break;
-			}
-		}
-
-		i = tmp;
-	}
-
+	
+	// Remove invalid crossfade views
 	for (xi = crossfade_views.begin(); xi != crossfade_views.end();) {
 		tmpx = xi;
 		tmpx++;
@@ -447,11 +406,9 @@ AudioStreamView::redisplay_diskstream ()
 
 		xi = tmpx;
 	}
-	
-	// Fix canvas layering by raising each in the sorted list order
-	for (RegionViewList::iterator i = copy.begin(); i != copy.end(); ++i) {
-		region_layered (*i);
-	}
+
+	// Stack regions by layer, and remove invalid regions
+	layer_regions();
 }
 
 void
diff --git a/gtk2_ardour/automation_streamview.cc b/gtk2_ardour/automation_streamview.cc
index e7ab760709..2769ab846d 100644
--- a/gtk2_ardour/automation_streamview.cc
+++ b/gtk2_ardour/automation_streamview.cc
@@ -158,35 +158,20 @@ AutomationStreamView::redisplay_diskstream ()
 {
 	list<RegionView *>::iterator i, tmp;
 
+	// Flag region views as invalid and disable drawing
 	for (i = region_views.begin(); i != region_views.end(); ++i) {
 		(*i)->set_valid (false);
+		(*i)->enable_display(false);
 	}
-	
+
+	// Add and display region views, and flag them as valid
 	if (_trackview.is_track()) {
 		_trackview.get_diskstream()->playlist()->foreach_region (
 			static_cast<StreamView*>(this), &StreamView::add_region_view);
 	}
-
-	for (i = region_views.begin(); i != region_views.end(); ) {
-		tmp = i;
-		tmp++;
-
-		if (!(*i)->is_valid()) {
-			delete *i;
-			region_views.erase (i);
-		} else {
-			(*i)->enable_display(true);
-			(*i)->set_height(height);
-		}
-
-		i = tmp;
-	}
 	
-	/* now fix layering */
-
-	for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
-		region_layered (*i);
-	}
+	// Stack regions by layer, and remove invalid regions
+	layer_regions();
 }
 
 
diff --git a/gtk2_ardour/midi_streamview.cc b/gtk2_ardour/midi_streamview.cc
index 178919a32c..5bb232bded 100644
--- a/gtk2_ardour/midi_streamview.cc
+++ b/gtk2_ardour/midi_streamview.cc
@@ -236,7 +236,7 @@ MidiStreamView::redisplay_diskstream ()
 		return;
 	}
 
-	list<RegionView*>::iterator i, tmp;
+	list<RegionView*>::iterator i;
 
 	// Load models if necessary, and find note range of all our contents
 	_range_dirty = false;
@@ -264,60 +264,15 @@ MidiStreamView::redisplay_diskstream ()
 		(*i)->enable_display(false);
 	}
 
-	// Add and display region views, and flag existing ones as valid
+	// Add and display region views, and flag them as valid
 	_trackview.get_diskstream()->playlist()->foreach_region(
 			static_cast<StreamView*>(this),
 			&StreamView::add_region_view);
 
-	// Build a list of region views sorted by layer, and remove invalids
-	RegionViewList copy;
-	for (i = region_views.begin(); i != region_views.end(); ) {
-		tmp = i;
-		tmp++;
-
-		if (!(*i)->is_valid()) {
-			delete *i;
-			region_views.erase (i);
-			i = tmp;
-			continue;
-		}
-		
-		if (copy.size() == 0) {
-			copy.push_front((*i));
-			i = tmp;
-			continue;
-		}
-
-		RegionViewList::iterator k = copy.begin();
-		RegionViewList::iterator l = copy.end();
-		l--;
-
-		if ((*i)->region()->layer() <= (*k)->region()->layer()) {
-			copy.push_front((*i));
-			i = tmp;
-			continue;
-		} else if ((*i)->region()->layer() >= (*l)->region()->layer()) {
-			copy.push_back((*i));
-			i = tmp;
-			continue;
-		}
-
-		for (RegionViewList::iterator j = copy.begin(); j != copy.end(); ++j) {
-			if ((*j)->region()->layer() >= (*i)->region()->layer()) {
-				copy.insert(j, (*i));
-				break;
-			}
-		}
+	// Stack regions by layer, and remove invalid regions
+	layer_regions();
 
-		i = tmp;
-	}
-	
-	// Fix canvas layering by raising each in the sorted list order
-	for (RegionViewList::iterator j = copy.begin(); j != copy.end(); ++j) {
-		region_layered (*j);
-	}
-	
-	// Update note range (not to regions which are already good) and draw note lines
+	// Update note range (not regions which are correct) and draw note lines
 	apply_note_range(_lowest_note, _highest_note, false);
 }
 
diff --git a/gtk2_ardour/streamview.cc b/gtk2_ardour/streamview.cc
index ab61338d2d..5810d10eaf 100644
--- a/gtk2_ardour/streamview.cc
+++ b/gtk2_ardour/streamview.cc
@@ -70,11 +70,7 @@ StreamView::StreamView (RouteTimeAxisView& tv, ArdourCanvas::Group* group)
 	canvas_rect->property_y2() = (double) tv.current_height();
 	canvas_rect->raise(1); // raise above tempo lines
 
-	// DR-way
 	canvas_rect->property_outline_what() = (guint32) (0x2|0x8);  // outline RHS and bottom 
-	// 2.0 way
-	//canvas_rect->property_outline_what() = (guint32) (0x1|0x2|0x8);  // outline ends and bottom 
-	// (Fill/Outline colours set in derived classes)
 
 	canvas_rect->signal_event().connect (bind (mem_fun (_trackview.editor(), &PublicEditor::canvas_stream_view_event), canvas_rect, &_trackview));
 
@@ -226,6 +222,63 @@ StreamView::playlist_modified_weak (boost::weak_ptr<Diskstream> ds)
 }
 
 void
+StreamView::layer_regions()
+{
+	// In one traversal of the region view list:
+	// - Build a list of region views sorted by layer
+	// - Remove invalid views from the actual region view list
+	RegionViewList copy;
+	list<RegionView*>::iterator i, tmp;
+	for (i = region_views.begin(); i != region_views.end(); ) {
+		tmp = i;
+		tmp++;
+
+		if (!(*i)->is_valid()) {
+			delete *i;
+			region_views.erase (i);
+			i = tmp;
+			continue;
+		} else {
+			(*i)->enable_display(true);
+		}
+
+		if (copy.size() == 0) {
+			copy.push_front((*i));
+			i = tmp;
+			continue;
+		}
+
+		RegionViewList::iterator k = copy.begin();
+		RegionViewList::iterator l = copy.end();
+		l--;
+
+		if ((*i)->region()->layer() <= (*k)->region()->layer()) {
+			copy.push_front((*i));
+			i = tmp;
+			continue;
+		} else if ((*i)->region()->layer() >= (*l)->region()->layer()) {
+			copy.push_back((*i));
+			i = tmp;
+			continue;
+		}
+
+		for (RegionViewList::iterator j = copy.begin(); j != copy.end(); ++j) {
+			if ((*j)->region()->layer() >= (*i)->region()->layer()) {
+				copy.insert(j, (*i));
+				break;
+			}
+		}
+
+		i = tmp;
+	}
+
+	// Fix canvas layering by raising each in the sorted list order
+	for (RegionViewList::iterator i = copy.begin(); i != copy.end(); ++i) {
+		region_layered (*i);
+	}
+}
+
+void
 StreamView::playlist_modified (boost::shared_ptr<Diskstream> ds)
 {
 	/* we do not allow shared_ptr<T> to be bound to slots */
diff --git a/gtk2_ardour/streamview.h b/gtk2_ardour/streamview.h
index 932e919cee..0cbb4447d5 100644
--- a/gtk2_ardour/streamview.h
+++ b/gtk2_ardour/streamview.h
@@ -124,6 +124,7 @@ protected:
 	void         display_diskstream (boost::shared_ptr<ARDOUR::Diskstream>);
 	virtual void undisplay_diskstream ();
 	void         diskstream_changed ();
+	void         layer_regions ();
 	
 	virtual void playlist_changed (boost::shared_ptr<ARDOUR::Diskstream>);
 	virtual void playlist_modified_weak (boost::weak_ptr<ARDOUR::Diskstream>);