diff options
Diffstat (limited to 'libs/canvas/canvas.cc')
| -rw-r--r-- | libs/canvas/canvas.cc | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/libs/canvas/canvas.cc b/libs/canvas/canvas.cc index 3d4f9e0c5d..c13386408b 100644 --- a/libs/canvas/canvas.cc +++ b/libs/canvas/canvas.cc @@ -170,7 +170,9 @@ Canvas::item_shown_or_hidden (Item* item) { boost::optional<Rect> bbox = item->bounding_box (); if (bbox) { - queue_draw_item_area (item, bbox.get ()); + if (item->item_to_window (*bbox).intersection (visible_area ())) { + queue_draw_item_area (item, bbox.get ()); + } } } @@ -183,7 +185,9 @@ Canvas::item_visual_property_changed (Item* item) { boost::optional<Rect> bbox = item->bounding_box (); if (bbox) { - queue_draw_item_area (item, bbox.get ()); + if (item->item_to_window (*bbox).intersection (visible_area ())) { + queue_draw_item_area (item, bbox.get ()); + } } } @@ -195,15 +199,24 @@ Canvas::item_visual_property_changed (Item* item) void Canvas::item_changed (Item* item, boost::optional<Rect> pre_change_bounding_box) { + + Rect window_bbox = visible_area (); + if (pre_change_bounding_box) { - /* request a redraw of the item's old bounding box */ - queue_draw_item_area (item, pre_change_bounding_box.get ()); + + if (item->item_to_window (*pre_change_bounding_box).intersection (window_bbox)) { + /* request a redraw of the item's old bounding box */ + queue_draw_item_area (item, pre_change_bounding_box.get ()); + } } boost::optional<Rect> post_change_bounding_box = item->bounding_box (); if (post_change_bounding_box) { - /* request a redraw of the item's new bounding box */ - queue_draw_item_area (item, post_change_bounding_box.get ()); + + if (item->item_to_window (*post_change_bounding_box).intersection (window_bbox)) { + /* request a redraw of the item's new bounding box */ + queue_draw_item_area (item, post_change_bounding_box.get ()); + } } } |