diff options
Diffstat (limited to 'libs/canvas/canvas/item.h')
| -rw-r--r-- | libs/canvas/canvas/item.h | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/libs/canvas/canvas/item.h b/libs/canvas/canvas/item.h index e856c7e149..da061f5bfc 100644 --- a/libs/canvas/canvas/item.h +++ b/libs/canvas/canvas/item.h @@ -28,6 +28,7 @@ #include "pbd/signals.h" +#include "canvas/visibility.h" #include "canvas/types.h" namespace ArdourCanvas @@ -48,7 +49,7 @@ class Rect; * and all except the `root group' have a pointer to their parent group. */ -class Item +class LIBCANVAS_API Item { public: Item (Canvas *); @@ -56,6 +57,8 @@ public: Item (Group *, Duple); virtual ~Item (); + void redraw () const; + /** Render this item to a Cairo context. * @param area Area to draw, in **window** coordinates * @@ -73,6 +76,8 @@ public: items.push_back (this); } + virtual bool covers (Duple const &) const; + /** Update _bounding_box and _bounding_box_dirty */ virtual void compute_bounding_box () const = 0; @@ -86,6 +91,21 @@ public: Group* parent () const { return _parent; } + + uint32_t depth() const; + const Item* closest_ancestor_with (const Item& other) const; + bool common_ancestor_within (uint32_t, const Item& other) const; + + /** returns true if this item is an ancestor of @param candidate, + * and false otherwise. + */ + bool is_ancestor_of (const Item& candidate) const { + return candidate.is_descendant_of (*this); + } + /** returns true if this Item is a descendant of @param candidate, + * and false otherwise. + */ + bool is_descendant_of (const Item& candidate) const; void set_position (Duple); void set_x_position (Coord); @@ -222,7 +242,7 @@ private: bool _ignore_events; }; -extern std::ostream& operator<< (std::ostream&, const ArdourCanvas::Item&); +extern LIBCANVAS_API std::ostream& operator<< (std::ostream&, const ArdourCanvas::Item&); } |