basic xfade dragging

git-svn-id: svn://localhost/ardour2/branches/3.0@12236 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/audio_region_view.cc

@@ -1530,12 +1530,18 @@ void
 AudioRegionView::redraw_start_xfade ()
 {
 	boost::shared_ptr<AudioRegion> ar (audio_region());
-	
+
 	if (!ar->fade_in() || ar->fade_in()->empty()) {
 		return;
 	}
 
-	int32_t const npoints = trackview.editor().frame_to_pixel (ar->fade_in()->back()->when);
+	redraw_start_xfade_to (ar, ar->fade_in()->back()->when);
+}
+
+void
+AudioRegionView::redraw_start_xfade_to (boost::shared_ptr<AudioRegion> ar, framecnt_t len)
+{
+	int32_t const npoints = trackview.editor().frame_to_pixel (len);
 
 	if (npoints < 3) {
 		return;
@@ -1560,6 +1566,7 @@ AudioRegionView::redraw_start_xfade ()
 		start_xfade_rect->property_fill_color_rgba() =  ARDOUR_UI::config()->canvasvar_ActiveCrossfade.get();
 		start_xfade_rect->property_outline_pixels() = 0;
 		start_xfade_rect->signal_event().connect (sigc::bind (sigc::mem_fun (PublicEditor::instance(), &PublicEditor::canvas_start_xfade_event), start_xfade_rect, this));
+		start_xfade_rect->set_data ("regionview", this);
 	}
 
 	Points* points = get_canvas_points ("xfade edit redraw", npoints);
@@ -1623,7 +1630,13 @@ AudioRegionView::redraw_end_xfade ()
 		return;
 	}
 
-	int32_t const npoints = trackview.editor().frame_to_pixel (ar->fade_out()->back()->when);
+	redraw_end_xfade_to (ar, ar->fade_out()->back()->when);
+}
+
+void
+AudioRegionView::redraw_end_xfade_to (boost::shared_ptr<AudioRegion> ar, framecnt_t len)
+{
+	int32_t const npoints = trackview.editor().frame_to_pixel (len);
 
 	if (npoints < 3) {
 		return;
@@ -1647,8 +1660,8 @@ AudioRegionView::redraw_end_xfade ()
 		end_xfade_rect->property_fill() = true;;
 		end_xfade_rect->property_fill_color_rgba() =  ARDOUR_UI::config()->canvasvar_ActiveCrossfade.get();
 		end_xfade_rect->property_outline_pixels() = 0;
-
 		end_xfade_rect->signal_event().connect (sigc::bind (sigc::mem_fun (PublicEditor::instance(), &PublicEditor::canvas_end_xfade_event), end_xfade_rect, this));
+		end_xfade_rect->set_data ("regionview", this);
 	}
 
 	Points* points = get_canvas_points ("xfade edit redraw", npoints);
@@ -1656,7 +1669,7 @@ AudioRegionView::redraw_end_xfade ()
 
 	ar->fade_out()->curve().get_vector (0, ar->fade_out()->back()->when, vec.get(), npoints);
 
-	double rend = trackview.editor().frame_to_pixel (_region->length() - ar->fade_out()->back()->when);
+	double rend = trackview.editor().frame_to_pixel (_region->length() - len);
 
 	for (int i = 0, pci = 0; i < npoints; ++i) {
 		Gnome::Art::Point &p ((*points)[pci++]);
@@ -1706,6 +1719,7 @@ AudioRegionView::redraw_end_xfade ()
 
 	delete points;
 }
+
 void
 AudioRegionView::drag_start ()
 {
@@ -1755,3 +1769,4 @@ AudioRegionView::drag_end ()
 		end_xfade_rect->show ();
 	}
 }
+

gtk2_ardour/audio_region_view.h

@@ -120,6 +120,11 @@ class AudioRegionView : public RegionView
 	void drag_start ();
 	void drag_end ();
 
+	void redraw_start_xfade_to (boost::shared_ptr<ARDOUR::AudioRegion>, framecnt_t);
+	void redraw_end_xfade_to (boost::shared_ptr<ARDOUR::AudioRegion>, framecnt_t);
+	void redraw_start_xfade ();
+	void redraw_end_xfade ();
+
   protected:
 
 	/* this constructor allows derived types
@@ -190,9 +195,6 @@ class AudioRegionView : public RegionView
 
 	void transients_changed();
 
-	void redraw_start_xfade ();
-	void redraw_end_xfade ();
-
 private:
 	void setup_fade_handle_positions ();
 

gtk2_ardour/editor_drag.cc

@@ -4576,15 +4576,60 @@ CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
 void
 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
 {
+	double distance = _drags->current_pointer_x() - grab_x();
+	double new_length;
+	framecnt_t len;
+
+	boost::shared_ptr<AudioRegion> ar (arv->audio_region());
+
+	if (start) {
+		len = ar->fade_in()->back()->when;
+	} else {
+		len = ar->fade_out()->back()->when;
+	}
+
+	new_length = len + _editor->unit_to_frame (distance);
+	
+	if (start) {
+		arv->redraw_start_xfade_to (ar, new_length);
+	} else {
+		arv->redraw_end_xfade_to (ar, new_length);
+	}
+
+	// _editor->update_canvas_now ();
 }
 
 void
 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
 {
+	double distance = _drags->current_pointer_x() - grab_x();
+	double new_length;
+	framecnt_t len;
+
+	boost::shared_ptr<AudioRegion> ar (arv->audio_region());
+
+	if (start) {
+		len = ar->fade_in()->back()->when;
+	} else {
+		len = ar->fade_out()->back()->when;
+	}
+
+	new_length = len + _editor->unit_to_frame (distance);
+	
+	if (start) {
+		ar->set_fade_in_length (new_length);
+	} else {
+		ar->set_fade_out_length (new_length);
+	}
 }
 
 void
 CrossfadeEdgeDrag::aborted (bool)
 {
+	if (start) {
+		arv->redraw_start_xfade ();
+	} else {
+		arv->redraw_end_xfade ();
+	}
 }
 

gtk2_ardour/editor_drag.h

@@ -985,10 +985,14 @@ class CrossfadeEdgeDrag : public Drag
 	void finished (GdkEvent*, bool);
 	void aborted (bool);
 	
-	bool x_movement_matters () const {
+	bool y_movement_matters () const {
 		return false;
 	}
 
+	virtual std::pair<ARDOUR::framecnt_t, int> move_threshold () const {
+		return std::make_pair (1, 1);
+	}
+
   private:
 	AudioRegionView* arv;
 	bool start;

gtk2_ardour/editor_mouse.cc

@@ -940,7 +940,7 @@ Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 				break;
 
 			case EndCrossFadeItem:
-				_drags->set (new CrossfadeEdgeDrag (this, reinterpret_cast<AudioRegionView*>(item->get_data("regionview")), item, true), event, 0);
+				_drags->set (new CrossfadeEdgeDrag (this, reinterpret_cast<AudioRegionView*>(item->get_data("regionview")), item, false), event, 0);
 				break;
 
 			case FeatureLineItem: