ardour/livetrax
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add a transparent rect that is always located at the bottom of the track canvas

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This gives us an event/drag-n-drop/click target for things "at the bottom"
This commit is contained in:
Paul Davis 2014-04-16 04:16:56 -04:00
parent 8b93576c18
commit 5668eea2a3
3 changed files with 34 additions and 1 deletions
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6
gtk2_ardour/editor.h
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@ -737,6 +737,12 @@ class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARD
/* The group used for region motion. Sits on top of _trackview_group */
ArdourCanvas::Group* _region_motion_group;
/* a rect that sits at the bottom of all tracks to act as a drag-no-drop/clickable
* target area.
*/
ArdourCanvas::Rectangle* _canvas_bottom_rect;
bool canvas_bottom_rect_event (GdkEvent* event);
enum RulerType {
ruler_metric_timecode = 0,
ruler_metric_bbt = 1,

21
gtk2_ardour/editor_canvas.cc
View File

@ -212,6 +212,13 @@ Editor::initialize_canvas ()
logo_item->lower_to_bottom ();
}
_canvas_bottom_rect = new ArdourCanvas::Rectangle (_track_canvas->root(), ArdourCanvas::Rect (0.0, 0.0, max_canvas_coordinate, 20));
/* this thing is transparent */
_canvas_bottom_rect->set_fill (false);
_canvas_bottom_rect->set_outline (false);
_canvas_bottom_rect->Event.connect (sigc::mem_fun (*this, &Editor::canvas_bottom_rect_event));
/* these signals will initially be delivered to the canvas itself, but if they end up remaining unhandled, they are passed to Editor-level
handlers.
*/
@ -316,12 +323,24 @@ Editor::reset_controls_layout_width ()
void
Editor::reset_controls_layout_height (int32_t h)
{
/* ensure that the rect that represents the "bottom" of the canvas
* (the drag-n-drop zone) is, in fact, at the bottom.
*/
_canvas_bottom_rect->set_position (ArdourCanvas::Duple (0, h));
/* track controls layout must span the full height of "h" (all tracks)
* plus the bottom rect.
*/
h += _canvas_bottom_rect->height ();
/* set the height of the scrollable area (i.e. the sum of all contained widgets)
* for the controls layout. The size request is set elsewhere.
*/
controls_layout.property_height() = h;
/* size request is set elsewhere, see ::track_canvas_allocate() */
}
bool

8
gtk2_ardour/editor_canvas_events.cc
View File

@ -1009,6 +1009,13 @@ Editor::canvas_note_event (GdkEvent *event, ArdourCanvas::Item* item)
return typed_event (item, event, NoteItem);
}
bool
Editor::canvas_bottom_rect_event (GdkEvent* event)
{
cerr << "CBR event, type " << event << endl;
return true;
}
bool
Editor::track_canvas_drag_motion (Glib::RefPtr<Gdk::DragContext> const& context, int x, int y, guint time)
{
@ -1191,3 +1198,4 @@ Editor::key_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType
return handled;
}