From 5cd27a4a85919b289d666a21e2b682bed8a9f970 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 21 Dec 2011 02:53:33 +0000
Subject: similar to treatment of meter markers, remove tempo marks from the
 tempo map while dragging, to avoid wierd side effects

git-svn-id: svn://localhost/ardour2/branches/3.0@11047 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 gtk2_ardour/editor_drag.cc | 78 +++++++++++++++++++++++++++++++++-------------
 1 file changed, 56 insertions(+), 22 deletions(-)

(limited to 'gtk2_ardour')

diff --git a/gtk2_ardour/editor_drag.cc b/gtk2_ardour/editor_drag.cc
index 3847d144d3..b90cb88c6f 100644
--- a/gtk2_ardour/editor_drag.cc
+++ b/gtk2_ardour/editor_drag.cc
@@ -1947,6 +1947,17 @@ void
 MeterMarkerDrag::aborted (bool)
 {
 	_marker->set_position (_marker->meter().frame ());
+
+	/* XXX problem: we don't know if we've moved yet, so we don't 
+	   know if the marker is a copy yet or not
+	*/
+
+	TempoMap& map (_editor->session()->tempo_map());
+	/* we removed it before, so add it back now */
+	map.add_meter (_marker->meter(), _marker->meter().frame());
+	// delete the dummy marker we used for visual representation while moving.
+	// a new visual marker will show up automatically.
+	delete _marker;
 }
 
 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
@@ -1962,14 +1973,35 @@ TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
 void
 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
 {
-	if (_copy) {
+	Drag::start_grab (event, cursor);
+	show_verbose_cursor_time (adjusted_current_frame (event));
+}
 
+void
+TempoMarkerDrag::setup_pointer_frame_offset ()
+{
+	_pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
+}
+
+void
+TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
+{
+	if (first_move) {
+
+		// create a dummy marker for visual representation of moving the
+		// section, because whether its a copy or not, we're going to 
+		// leave or lose the original marker (leave if its a copy; lose if its
+		// not, because we'll remove it from the map).
+		
 		// create a dummy marker for visual representation of moving the copy.
 		// The actual copying is not done before we reach the finish callback.
+
 		char name[64];
 		snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
 
-		TempoMarker* new_marker = new TempoMarker (
+		TempoSection section (_marker->tempo());
+
+		_marker = new TempoMarker (
 			*_editor,
 			*_editor->tempo_group,
 			ARDOUR_UI::config()->canvasvar_TempoMarker.get(),
@@ -1977,25 +2009,16 @@ TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
 			*new TempoSection (_marker->tempo())
 			);
 
-		_item = &new_marker->the_item ();
-		_marker = new_marker;
+		/* use the new marker for the grab */
+		swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
 
+		if (!_copy) {
+			TempoMap& map (_editor->session()->tempo_map());
+			/* remove the section while we drag it */
+			map.remove_tempo (section);
+		}
 	}
 
-	Drag::start_grab (event, cursor);
-
-	show_verbose_cursor_time (adjusted_current_frame (event));
-}
-
-void
-TempoMarkerDrag::setup_pointer_frame_offset ()
-{
-	_pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
-}
-
-void
-TempoMarkerDrag::motion (GdkEvent* event, bool)
-{
 	framepos_t const pf = adjusted_current_frame (event);
 	_marker->set_position (pf);
 	show_verbose_cursor_time (pf);
@@ -2023,23 +2046,34 @@ TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
 		_editor->session()->add_command (new MementoCommand<TempoMap>(map, &before, &after));
 		_editor->commit_reversible_command ();
 
-		// delete the dummy marker we used for visual representation of copying.
-		// a new visual marker will show up automatically.
-		delete _marker;
 	} else {
 		_editor->begin_reversible_command (_("move tempo mark"));
 		XMLNode &before = map.get_state();
-		map.move_tempo (_marker->tempo(), when);
+		/* we removed it before, so add it back now */
+		map.add_tempo (_marker->tempo(), when);
 		XMLNode &after = map.get_state();
 		_editor->session()->add_command (new MementoCommand<TempoMap>(map, &before, &after));
 		_editor->commit_reversible_command ();
 	}
+
+	// delete the dummy marker we used for visual representation while moving.
+	// a new visual marker will show up automatically.
+	delete _marker;
 }
 
 void
 TempoMarkerDrag::aborted (bool)
 {
 	_marker->set_position (_marker->tempo().frame());
+	/* XXX problem: we don't know if we've moved yet, so we don't 
+	   know if the marker is a copy yet or not
+	*/
+	TempoMap& map (_editor->session()->tempo_map());
+	/* we removed it before, so add it back now */
+	map.add_tempo (_marker->tempo(), _marker->tempo().frame());
+	// delete the dummy marker we used for visual representation while moving.
+	// a new visual marker will show up automatically.
+	delete _marker;
 }
 
 CursorDrag::CursorDrag (Editor* e, ArdourCanvas::Item* i, bool s)
-- 
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