rationalize and coordinate handle of region (time axis view item) opacity.

There are still some bugs with this because of the waveview image cache - fixes coming soon.

gtk2_ardour/editor_drag.cc

@@ -743,7 +743,6 @@ RegionMotionDrag::motion (GdkEvent* event, bool first_move)
 
 		if (first_move) {
 			rv->drag_start (); 
-			rv->set_opacity_for_drag (true);
 
 			/* reparent the regionview into a group above all
 			 * others
@@ -938,10 +937,6 @@ RegionMoveDrag::motion (GdkEvent* event, bool first_move)
 void
 RegionMotionDrag::finished (GdkEvent *, bool)
 {
-	for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
-		i->view->set_opacity_for_drag (false);
-	}
-
 	for (vector<TimeAxisView*>::iterator i = _time_axis_views.begin(); i != _time_axis_views.end(); ++i) {
 		if (!(*i)->view()) {
 			continue;
@@ -1200,7 +1195,7 @@ RegionMoveDrag::finished_no_copy (
 			   visible.
 			*/
 			rv->hide_region_editor();
-			rv->set_opacity_for_drag (false);
+
 
 			remove_region_from_playlist (rv->region(), i->initial_playlist, modified_playlists);
 
@@ -1435,7 +1430,6 @@ RegionMotionDrag::aborted (bool)
 		rv->get_canvas_group()->reparent (rtv->view()->canvas_item());
 		rv->get_canvas_group()->set_y_position (0);
 		rv->drag_end ();
-		rv->set_opacity_for_drag (false);
 		rv->move (-_total_x_delta, 0);
 		rv->set_height (rtv->view()->child_height ());
 	}
@@ -1837,7 +1831,6 @@ VideoTimeLineDrag::motion (GdkEvent* event, bool first_move)
 		DEBUG_TRACE (DEBUG::Drags, string_compose("SHIFT REGION at %1 by %2\n", i->initial_position, dt));
 		if (first_move) {
 			rv->drag_start ();
-			rv->set_opacity_for_drag (true);
 			rv->region()->clear_changes ();
 			rv->region()->suspend_property_changes();
 		}
@@ -1885,7 +1878,6 @@ VideoTimeLineDrag::finished (GdkEvent * /*event*/, bool movement_occurred)
 
 	for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
 		i->view->drag_end();
-		i->view->set_opacity_for_drag (false);
 		i->view->region()->resume_property_changes ();
 
 		_editor->session()->add_command (new StatefulDiffCommand (i->view->region()));
@@ -2021,7 +2013,6 @@ TrimDrag::motion (GdkEvent* event, bool first_move)
 
 		for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 			RegionView* rv = i->view;
-			rv->set_opacity_for_drag (false);
 			rv->enable_display (false);
 			rv->region()->playlist()->clear_owned_changes ();
 
@@ -2204,7 +2195,6 @@ TrimDrag::finished (GdkEvent* event, bool movement_occurred)
 			for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
                                 i->view->thaw_after_trim ();
 				i->view->enable_display (true);
-				i->view->set_opacity_for_drag (true);
 
 				/* Trimming one region may affect others on the playlist, so we need
 				   to get undo Commands from the whole playlist rather than just the

gtk2_ardour/region_view.cc

@@ -519,6 +519,18 @@ RegionView::set_duration (framecnt_t frames, void *src)
 	return true;
 }
 
+uint32_t
+RegionView::fill_opacity () const
+{
+	if (!_region->opaque()) {
+		return 60;
+	}
+	
+	uint32_t normal_tavi_opacity = TimeAxisViewItem::fill_opacity ();
+
+	return normal_tavi_opacity;
+}
+
 void
 RegionView::set_colors ()
 {
@@ -534,14 +546,6 @@ RegionView::set_colors ()
 void
 RegionView::set_frame_color ()
 {
-	if (!frame) {
-		return;
-	}
-
-	if (!_region->opaque()) {
-		fill_opacity = 60;
-	}
-
 	TimeAxisViewItem::set_frame_color ();
 }
 

gtk2_ardour/region_view.h

@@ -154,6 +154,8 @@ class RegionView : public TimeAxisViewItem
 	virtual void set_frame_color ();
 	virtual void reset_width_dependent_items (double pixel_width);
 
+	uint32_t fill_opacity () const;
+
 	virtual void color_handler () {}
 
 	boost::shared_ptr<ARDOUR::Region> _region;

gtk2_ardour/time_axis_view_item.cc

@@ -167,7 +167,6 @@ TimeAxisViewItem::init (ArdourCanvas::Group* parent, double fpp, uint32_t base_c
 	group->Event.connect (sigc::mem_fun (*this, &TimeAxisViewItem::canvas_group_event));
 
 	fill_color = base_color;
-	pre_drag_fill_color = base_color;
 	samples_per_pixel = fpp;
 	frame_position = start;
 	item_duration = duration;
@@ -280,7 +279,6 @@ TimeAxisViewItem::init (ArdourCanvas::Group* parent, double fpp, uint32_t base_c
 	}
 
 	set_color (base_color);
-	set_opacity_for_drag (false);
 
 	set_duration (item_duration, this);
 	set_position (start, this);
@@ -666,11 +664,7 @@ TimeAxisViewItem::get_name_highlight()
 void
 TimeAxisViewItem::set_colors()
 {
-	/* we cannot be dragging this item when changing colors,
-	   so reuse set_opacity_for_drag()
-	*/
-	set_opacity_for_drag (false);
-	set_frame_color();
+	set_frame_color ();
 
 	if (name_highlight) {
                 name_highlight->set_fill_color (fill_color);
@@ -705,19 +699,39 @@ TimeAxisViewItem::set_name_text_color ()
 	name_text->set_color (contrasting_text_color (f));
 }
 
+uint32_t
+TimeAxisViewItem::fill_opacity () const
+{
+	if (!rect_visible) {
+		/* if the frame/rect is marked as invisible, then the
+		 * fill should be transparent. simplest: set
+		 
+		 * alpha/opacity to zero.
+		 */
+		return 0;
+	}
+
+	if (_dragging) {
+		return 130;
+	}
+
+	uint32_t col = ARDOUR_UI::config()->get_canvasvar_FrameBase();
+	return UINT_RGBA_A (col);
+}
+
 uint32_t
 TimeAxisViewItem::get_fill_color () const
 {
         uint32_t f;
 	uint32_t o;
 
+	o = fill_opacity ();
+
 	if (_selected) {
 
                 f = ARDOUR_UI::config()->get_canvasvar_SelectedFrameBase();
 
-		if (fill_opacity != 0) {
-			o = fill_opacity;
-		} else {
+		if (o == 0) {
 			/* some condition of this item has set fill opacity to
 			 * zero, but it has been selected, so use a mid-way
 			 * alpha value to make it reasonably visible.
@@ -732,23 +746,10 @@ TimeAxisViewItem::get_fill_color () const
 		} else {
 			if ((!Config->get_show_name_highlight() || high_enough_for_name) && !ARDOUR_UI::config()->get_color_regions_using_track_color()) {
 				f = ARDOUR_UI::config()->get_canvasvar_FrameBase();
-				/* use the opacity as set for the FrameBase color */
-				o = UINT_RGBA_A (f);
 			} else {
 				f = fill_color;
-				o = fill_opacity;
 			}
 		}
-
-		/* tweak opacity */
-
-		if (!rect_visible) {
-			/* if the frame/rect is marked as invisible, then the
-			 * fill should be transparent. simplest: set
-			 * alpha/opacity to zero.
-			 */
-			o = 0;
-		}
 	}
 
 	return UINT_RGBA_CHANGE_A (f, o);
@@ -785,22 +786,6 @@ TimeAxisViewItem::set_frame_color()
         }
 }
 
-void
-TimeAxisViewItem::set_opacity_for_drag (bool drag_starting)
-{
-	if (drag_starting) {
-		fill_opacity = 130;
-	} else {
-		/* use the alpha/opacity value from the basic color, no matter whether 
-		   we use the color of our time axis or not.
-		*/
-		
-		uint32_t col = ARDOUR_UI::config()->get_canvasvar_FrameBase();
-		fill_opacity = UINT_RGBA_A (col);
-	}
-	set_frame_color ();
-}
-
 void
 TimeAxisViewItem::set_frame_gradient ()
 {
@@ -1017,3 +1002,17 @@ TimeAxisViewItem::parameter_changed (string p)
 		set_frame_gradient ();
 	}
 }
+
+void
+TimeAxisViewItem::drag_start ()
+{
+	_dragging = true;
+	set_frame_color ();
+}
+
+void
+TimeAxisViewItem::drag_end ()
+{
+	_dragging = false;
+	set_frame_color ();
+}

gtk2_ardour/time_axis_view_item.h

@@ -74,7 +74,6 @@ class TimeAxisViewItem : public Selectable, public PBD::ScopedConnectionList
 	void set_y (double);
 	void set_color (uint32_t);
 	void set_name_text_color ();
-	void set_opacity_for_drag (bool drag_starting);
 
         uint32_t get_fill_color () const;
 
@@ -86,8 +85,8 @@ class TimeAxisViewItem : public Selectable, public PBD::ScopedConnectionList
 
 	double get_samples_per_pixel () const;
 
-	virtual void drag_start() { _dragging = true; }
-	virtual void drag_end() { _dragging = false; }
+	virtual void drag_start();
+	virtual void drag_end();
 	bool dragging() const { return _dragging; }
 
 	virtual void raise () { return; }
@@ -230,9 +229,9 @@ class TimeAxisViewItem : public Selectable, public PBD::ScopedConnectionList
 	/** true if a small vestigial rect should be shown when the item gets very narrow */
 	bool show_vestigial;
 
-	uint32_t fill_opacity;
 	uint32_t fill_color;
-	uint32_t pre_drag_fill_color;
+
+	virtual uint32_t fill_opacity() const;
 
 	uint32_t last_item_width;
 	int name_text_width;