audun's tempo redraw fix; sort-of cache time axis view item name widths and avoid pango-width-computation when unnecessary

git-svn-id: svn://localhost/ardour2/trunk@1657 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/automation_line.cc

@@ -1136,6 +1136,13 @@ AutomationLine::set_selected_points (PointSelection& points)
 
 }
 
+void AutomationLine::set_colors() {
+	set_line_color( color_map[cAutomationLine] );
+	for (vector<ControlPoint*>::iterator i = control_points.begin(); i != control_points.end(); ++i) {
+		(*i)->show_color (false, !points_visible);
+	}
+}
+
 void
 AutomationLine::show_selection ()
 {

gtk2_ardour/automation_line.h

@@ -159,6 +159,7 @@ class AutomationLine : public sigc::trackable, public PBD::StatefulThingWithGoin
 
 	XMLNode& get_state (void);
 	int set_state (const XMLNode&);
+	void set_colors();
 
   protected:
 

gtk2_ardour/automation_time_axis.cc

@@ -163,6 +163,7 @@ AutomationTimeAxisView::AutomationTimeAxisView (Session& s, boost::shared_ptr<Ro
 	/* make sure labels etc. are correct */
 
 	automation_state_changed ();
+	ColorChanged.connect (mem_fun (*this, &AutomationTimeAxisView::color_handler));
 }
 
 AutomationTimeAxisView::~AutomationTimeAxisView ()
@@ -787,6 +788,42 @@ AutomationTimeAxisView::exited ()
 	hide_all_but_selected_control_points ();
 }
 
+void
+AutomationTimeAxisView::set_colors () {
+
+    for( list<GhostRegion *>::iterator i=ghosts.begin(); i != ghosts.end(); i++ ) {
+	(*i)->set_colors();
+    }
+    
+    for( vector<AutomationLine *>::iterator i=lines.begin(); i != lines.end(); i++ ) {
+	(*i)->set_colors();
+    }
+
+}
+
+void
+AutomationTimeAxisView::color_handler (ColorID id, uint32_t val) {
+    
+	switch (id) {
+	case cGhostTrackWave:
+	case cGhostTrackWaveClip:
+	case cGhostTrackZeroLine:
+
+	case cControlPoint:
+	case cControlPointFill:
+	case cControlPointOutline:
+	case cAutomationLine:
+		set_colors ();
+
+		break;
+
+	default: 
+		break;
+	}
+}
+
+
+
 void
 AutomationTimeAxisView::set_state (const XMLNode& node)
 {

gtk2_ardour/automation_time_axis.h

@@ -122,6 +122,9 @@ class AutomationTimeAxisView : public TimeAxisView {
 	void entered ();
 	void exited ();
 
+	void set_colors ();
+	void color_handler (ColorID, uint32_t);
+
 	static Pango::FontDescription name_font;
 	static bool have_name_font;
 };

gtk2_ardour/editor.cc

@@ -1075,7 +1075,7 @@ Editor::connect_to_session (Session *t)
 
 	session_connections.push_back (session->SMPTEOffsetChanged.connect (mem_fun(*this, &Editor::update_just_smpte)));
 
-	session_connections.push_back (session->tempo_map().StateChanged.connect (bind (mem_fun(*this, &Editor::tempo_map_changed), false)));
+	session_connections.push_back (session->tempo_map().StateChanged.connect (mem_fun(*this, &Editor::tempo_map_changed)));
 
 	edit_groups_changed ();
 
@@ -3665,7 +3665,7 @@ Editor::idle_visual_changer ()
 			/* the signal handler will do the rest */
 		} else {
 			update_fixed_rulers();
-			tempo_map_changed (Change (0), true);
+			redisplay_tempo (true);
 		}
 	}
 

gtk2_ardour/editor.h

@@ -1275,8 +1275,8 @@ class Editor : public PublicEditor
 	void remove_metric_marks ();
 	void draw_metric_marks (const ARDOUR::Metrics& metrics);
 
-	void tempo_map_changed (ARDOUR::Change, bool immediate_redraw);
+	void tempo_map_changed (ARDOUR::Change);
-	void redisplay_tempo ();
+	void redisplay_tempo (bool immediate_redraw);
 	
 	void snap_to (nframes_t& first, int32_t direction = 0, bool for_mark = false);
 	uint32_t bbt_beat_subdivision;

gtk2_ardour/editor_canvas.cc

@@ -368,7 +368,7 @@ Editor::track_canvas_size_allocated ()
 	}
 		
 	update_fixed_rulers();
-	tempo_map_changed (Change (0), true);
+	redisplay_tempo (true);
 	
 	Resized (); /* EMIT_SIGNAL */
 
@@ -723,6 +723,6 @@ Editor::canvas_horizontally_scrolled ()
 	
 	update_fixed_rulers ();
 
-	tempo_map_changed (Change (0), !_dragging_hscrollbar);
+	redisplay_tempo (!_dragging_hscrollbar);
 }
 

gtk2_ardour/editor_rulers.cc

@@ -709,7 +709,7 @@ Editor::update_ruler_visibility ()
 	
 	update_fixed_rulers();
 	//update_tempo_based_rulers();
-	tempo_map_changed(Change (0), false);
+	redisplay_tempo (false);
 
 	time_canvas_event_box.show_all();
 	time_button_frame.show_all();

gtk2_ardour/editor_tempodisplay.cc

@@ -93,13 +93,28 @@ Editor::draw_metric_marks (const Metrics& metrics)
 }
 
 void
-Editor::tempo_map_changed (Change ignored, bool immediate_redraw)
+Editor::tempo_map_changed (Change ignored)
 {
 	if (!session) {
 		return;
 	}
 
-        ENSURE_GUI_THREAD(bind (mem_fun (*this, &Editor::tempo_map_changed), ignored, immediate_redraw));
+	ENSURE_GUI_THREAD(bind (mem_fun (*this, &Editor::tempo_map_changed), ignored));
+	
+	redisplay_tempo (false); // redraw rulers and measures
+	session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks); // redraw metric markers
+}
+
+/**
+ * This code was originally in tempo_map_changed, but this is called every time the canvas scrolls horizontally. 
+ * That's why this is moved in here. The new tempo_map_changed is called when the ARDOUR::TempoMap actually changed.
+ */
+void
+Editor::redisplay_tempo (bool immediate_redraw)
+{
+	if (!session) {
+		return;
+	}
 
 	BBT_Time previous_beat, next_beat; // the beats previous to the leftmost frame and after the rightmost frame
 
@@ -152,11 +167,6 @@ Editor::tempo_map_changed (Change ignored, bool immediate_redraw)
 	}
 }
 
-void
-Editor::redisplay_tempo ()
-{	
-}
-
 void
 Editor::hide_measures ()
 {
@@ -307,8 +317,6 @@ Editor::mouse_add_new_tempo_event (nframes_t frame)
 	commit_reversible_command ();
 	
 	map.dump (cerr);
-
-	session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks);
 }
 
 void
@@ -349,8 +357,6 @@ Editor::mouse_add_new_meter_event (nframes_t frame)
 	commit_reversible_command ();
 	
 	map.dump (cerr);
-
-	session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks);
 }
 
 void
@@ -401,8 +407,6 @@ Editor::edit_meter_section (MeterSection* section)
         XMLNode &after = session->tempo_map().get_state();
 	session->add_command(new MementoCommand<TempoMap>(session->tempo_map(), &before, &after));
 	commit_reversible_command ();
-
-	session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks);
 }
 
 void
@@ -433,8 +437,6 @@ Editor::edit_tempo_section (TempoSection* section)
         XMLNode &after = session->tempo_map().get_state();
 	session->add_command (new MementoCommand<TempoMap>(session->tempo_map(), &before, &after));
 	commit_reversible_command ();
-
-	session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks);
 }
 
 void
@@ -485,8 +487,6 @@ Editor::real_remove_tempo_marker (TempoSection *section)
 	session->add_command(new MementoCommand<TempoMap>(session->tempo_map(), &before, &after));
 	commit_reversible_command ();
 
-	session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks);
-
 	return FALSE;
 }
 
@@ -521,7 +521,5 @@ Editor::real_remove_meter_marker (MeterSection *section)
 	session->add_command(new MementoCommand<TempoMap>(session->tempo_map(), &before, &after));
 	commit_reversible_command ();
 
-	session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks);
-
 	return FALSE;
 }

gtk2_ardour/ghostregion.cc

@@ -69,3 +69,13 @@ GhostRegion::set_height ()
 	}
 }
 
+void
+GhostRegion::set_colors ()
+{
+    for (uint32_t n=0; n < waves.size(); ++n) {
+	waves[n]->property_wave_color() = color_map[cGhostTrackWave];
+
+	waves[n]->property_clip_color() = color_map[cGhostTrackWaveClip];
+	waves[n]->property_zero_color() = color_map[cGhostTrackZeroLine];
+    }
+}

gtk2_ardour/ghostregion.h

@@ -41,6 +41,7 @@ struct GhostRegion : public sigc::trackable
     void set_samples_per_unit (double spu);
     void set_duration (double units);
     void set_height ();
+    void set_colors ();
 
     sigc::signal<void,GhostRegion*> GoingAway;
 };

gtk2_ardour/time_axis_view_item.cc

@@ -125,6 +125,8 @@ void
 TimeAxisViewItem::init (const string& it_name, double spu, Gdk::Color& base_color, nframes_t start, nframes_t duration, Visibility vis)
 {
 	item_name = it_name ;
+	name_text_width = ::pixel_width (it_name, NAME_FONT);
+	last_name_text_width = 0;
 	samples_per_unit = spu ;
 	should_show_selection = true;
 	frame_position = start ;
@@ -488,6 +490,7 @@ TimeAxisViewItem::set_item_name(std::string new_name, void* src)
 	if (new_name != item_name) {
 		std::string temp_name = item_name ;
 		item_name = new_name ;
+		name_text_width = ::pixel_width (new_name, NAME_FONT);
 		NameChanged (item_name, temp_name, src) ; /* EMIT_SIGNAL */
 	}
 }
@@ -553,10 +556,11 @@ TimeAxisViewItem::get_time_axis_view()
  * @param new_name the new name text to display
  */
 void
-TimeAxisViewItem::set_name_text(std::string new_name)
+TimeAxisViewItem::set_name_text(const ustring& new_name)
 {
 	if (name_text) {
 		name_text->property_text() = new_name.c_str();
+		name_text_width = pixel_width (new_name, NAME_FONT);
 	}
 }
 
@@ -914,6 +918,13 @@ TimeAxisViewItem::reset_name_width (double pixel_width)
 		return;
 	}
 
+	if ((last_name_text_width &&                                      // we did this once
+	     (name_text_width <= pixel_width - NAME_X_OFFSET) &&          // fits the new size
+	     (name_text_width <= last_name_text_width - NAME_X_OFFSET))) { // fit into the old size too
+		last_name_text_width = pixel_width;
+		return;
+	}
+                       
 	int width;
 	
 	ustring ustr = fit_to_pixels (item_name, (int) floor (pixel_width - NAME_X_OFFSET), NAME_FONT, width);
@@ -941,6 +952,8 @@ TimeAxisViewItem::reset_name_width (double pixel_width)
 		name_text->property_text() = ustr;
 		name_text->show();
 	}
+
+	last_name_text_width = pixel_width;
 }
 
 

gtk2_ardour/time_axis_view_item.h

@@ -199,7 +199,7 @@ class TimeAxisViewItem : public Selectable
      *
      * @param new_name the new name text to display
      */
-    void set_name_text(std::string new_name) ;
+    void set_name_text(const Glib::ustring& new_name) ;
     
     /**
      * Set the height of this item
@@ -461,6 +461,9 @@ class TimeAxisViewItem : public Selectable
     ArdourCanvas::SimpleRect* frame_handle_start;
     ArdourCanvas::SimpleRect* frame_handle_end;
 
+    int name_text_width;
+    double last_name_text_width;
+
     Visibility visibility;
 
 }; /* class TimeAxisViewItem */

gtk2_ardour/utils.cc

@@ -44,6 +44,20 @@ using namespace sigc;
 using namespace Glib;
 using namespace PBD;
 
+int
+pixel_width (const ustring& str, Pango::FontDescription& font)
+{
+	Label foo;
+	Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout ("");
+
+	layout->set_font_description (font);
+	layout->set_text (str);
+
+	int width, height;
+	Gtkmm2ext::get_ink_pixel_size (layout, width, height);
+	return width;
+}
+
 ustring
 fit_to_pixels (const ustring& str, int pixel_width, Pango::FontDescription& font, int& actual_width, bool with_ellipses)
 {

gtk2_ardour/utils.h

@@ -53,6 +53,7 @@ slider_position_to_gain (double pos)
 }
 
 Glib::ustring fit_to_pixels (const Glib::ustring&, int pixel_width, Pango::FontDescription& font, int& actual_width, bool with_ellipses = false);
+int pixel_width (const Glib::ustring& str, Pango::FontDescription& font);
 
 gint   just_hide_it (GdkEventAny*, Gtk::Window*);
 void   allow_keyboard_focus (bool);