remove ardour_message.{cc,h}; JACK latency menu now shows correct settings at startup and changes are handled correctly; export range markers doesn't start with /path/to/export.wav, just /path/to; hopefully improve ruler scrolling a little; fixed up short_path() implementation ; fix for export unsetting JACK freewheel too soon ; use ISO 8061 timestamps for snapshot default names

git-svn-id: svn://localhost/ardour2/trunk@1400 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 22 insertions, 0 deletions

diff --git a/gtk2_ardour/editor_canvas.cc b/gtk2_ardour/editor_canvas.cc
index 87e593b0ea..6c3ab9e217 100644
--- a/gtk2_ardour/editor_canvas.cc
+++ b/gtk2_ardour/editor_canvas.cc
@@ -700,3 +700,25 @@ Editor::left_track_canvas (GdkEventCrossing *ev)
 }
 
 
+void 
+Editor::canvas_horizontally_scrolled ()
+{
+	/* this is the core function that controls horizontal scrolling of the canvas. it is called
+	   whenever the horizontal_adjustment emits its "value_changed" signal. it typically executes in an
+	   idle handler, which is important because tempo_map_changed() should issue redraws immediately
+	   and not defer them to an idle handler.
+	*/
+
+  	leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
+	nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
+	
+	if (rightmost_frame > last_canvas_frame) {
+		last_canvas_frame = rightmost_frame;
+		reset_scrolling_region ();
+	}
+	
+	update_fixed_rulers ();
+
+	tempo_map_changed (Change (0), !_dragging_hscrollbar);
+}
+