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avoid recursing through the entire canvas when scrolling - only scroll explicitly identified ScrollGroups

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This commit is contained in:
Paul Davis 2014-05-21 10:25:28 -04:00
parent ff09ef3f60
commit 11e789df5b
3 changed files with 32 additions and 13 deletions
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10
gtk2_ardour/editor_canvas.cc
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@ -66,12 +66,14 @@ Editor::initialize_canvas ()
{
_track_canvas_viewport = new ArdourCanvas::GtkCanvasViewport (horizontal_adjustment, vertical_adjustment);
_track_canvas = _track_canvas_viewport->canvas ();
_track_canvas->set_global_scroll (false);
hv_scroll_group = new ArdourCanvas::ScrollGroup (_track_canvas->root(),
ArdourCanvas::ScrollGroup::ScrollSensitivity (ArdourCanvas::ScrollGroup::ScrollsVertically|
ArdourCanvas::ScrollGroup::ScrollsHorizontally));
ArdourCanvas::ScrollGroup* hsg;
hv_scroll_group = hsg = new ArdourCanvas::ScrollGroup (_track_canvas->root(),
ArdourCanvas::ScrollGroup::ScrollSensitivity (ArdourCanvas::ScrollGroup::ScrollsVertically|
ArdourCanvas::ScrollGroup::ScrollsHorizontally));
CANVAS_DEBUG_NAME (hv_scroll_group, "canvas hv scroll");
_track_canvas->add_scroller (*hsg);
_verbose_cursor = new VerboseCursor (this);