#include "canvas/canvas.h"
#include "canvas/debug.h"
-#include "canvas/group.h"
#include "canvas/item.h"
#include "canvas/scroll_group.h"
using namespace PBD;
using namespace ArdourCanvas;
+int Item::default_items_per_cell = 64;
+
Item::Item (Canvas* canvas)
: Fill (*this)
, Outline (*this)
, _scroll_parent (0)
, _visible (true)
, _bounding_box_dirty (true)
+ , _lut (0)
, _ignore_events (false)
{
DEBUG_TRACE (DEBUG::CanvasItems, string_compose ("new canvas item %1\n", this));
}
-Item::Item (Group* parent)
+Item::Item (Item* parent)
: Fill (*this)
, Outline (*this)
, _canvas (parent->canvas())
, _scroll_parent (0)
, _visible (true)
, _bounding_box_dirty (true)
+ , _lut (0)
, _ignore_events (false)
{
DEBUG_TRACE (DEBUG::CanvasItems, string_compose ("new canvas item %1\n", this));
find_scroll_parent ();
}
-Item::Item (Group* parent, Duple const& p)
+Item::Item (Item* parent, Duple const& p)
: Fill (*this)
, Outline (*this)
, _canvas (parent->canvas())
, _position (p)
, _visible (true)
, _bounding_box_dirty (true)
+ , _lut (0)
, _ignore_events (false)
{
DEBUG_TRACE (DEBUG::CanvasItems, string_compose ("new canvas item %1\n", this));
if (_canvas) {
_canvas->item_going_away (this, _bounding_box);
}
+
+ clear_items (true);
+ delete _lut;
}
Duple
{
if (_visible) {
_visible = false;
+
+ /* recompute parent bounding box, which may alter now that this
+ * child is hidden.
+ */
+
+ if (_parent) {
+ _parent->child_changed ();
+ }
+
_canvas->item_shown_or_hidden (this);
}
}
{
if (!_visible) {
_visible = true;
+
+ /* bounding box may have changed while we were hidden */
+
+ if (_parent) {
+ _parent->child_changed ();
+ }
+
_canvas->item_shown_or_hidden (this);
}
}
}
void
-Item::reparent (Group* new_parent)
+Item::reparent (Item* new_parent)
{
if (new_parent == _parent) {
return;
if (_bounding_box_dirty) {
compute_bounding_box ();
assert (!_bounding_box_dirty);
+ add_child_bounding_boxes ();
}
return _bounding_box;
{
if (_visible) {
_canvas->item_changed (this, _pre_change_bounding_box);
-
+
if (_parent) {
_parent->child_changed ();
}
_ignore_events = ignore;
}
-void
-Item::dump (ostream& o) const
-{
- boost::optional<ArdourCanvas::Rect> bb = bounding_box();
-
- o << _canvas->indent() << whatami() << ' ' << this << " Visible ? " << _visible;
- o << " @ " << position();
-
-#ifdef CANVAS_DEBUG
- if (!name.empty()) {
- o << ' ' << name;
- }
-#endif
-
- if (bb) {
- o << endl << _canvas->indent() << "\tbbox: " << bb.get();
- o << endl << _canvas->indent() << "\tCANVAS bbox: " << item_to_canvas (bb.get());
- } else {
- o << " bbox unset";
- }
-
- o << endl;
-}
-
std::string
Item::whatami () const
{
return r.get().contains (p);
}
+/* nesting/grouping API */
+
+void
+Item::render_children (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
+{
+ if (_items.empty()) {
+ return;
+ }
+
+ ensure_lut ();
+ std::vector<Item*> items = _lut->get (area);
+
+#ifdef CANVAS_DEBUG
+ if (DEBUG_ENABLED(PBD::DEBUG::CanvasRender)) {
+ cerr << string_compose ("%1%7 %2 @ %7 render %5 @ %6 %3 items out of %4\n",
+ _canvas->render_indent(), (name.empty() ? string ("[unnamed]") : name), items.size(), _items.size(), area, _position, this,
+ whatami());
+ }
+#endif
+
+ ++render_depth;
+
+ for (std::vector<Item*>::const_iterator i = items.begin(); i != items.end(); ++i) {
+
+ if (!(*i)->visible ()) {
+#ifdef CANVAS_DEBUG
+ if (DEBUG_ENABLED(PBD::DEBUG::CanvasRender)) {
+ cerr << _canvas->render_indent() << "Item " << (*i)->whatami() << " [" << (*i)->name << "] invisible - skipped\n";
+ }
+#endif
+ continue;
+ }
+
+ boost::optional<Rect> item_bbox = (*i)->bounding_box ();
+
+ if (!item_bbox) {
+#ifdef CANVAS_DEBUG
+ if (DEBUG_ENABLED(PBD::DEBUG::CanvasRender)) {
+ cerr << _canvas->render_indent() << "Item " << (*i)->whatami() << " [" << (*i)->name << "] empty - skipped\n";
+ }
+#endif
+ continue;
+ }
+
+ Rect item = (*i)->item_to_window (item_bbox.get());
+ boost::optional<Rect> d = item.intersection (area);
+
+ if (d) {
+ Rect draw = d.get();
+ if (draw.width() && draw.height()) {
+#ifdef CANVAS_DEBUG
+ if (DEBUG_ENABLED(PBD::DEBUG::CanvasRender)) {
+ if (dynamic_cast<Container*>(*i) == 0) {
+ cerr << _canvas->render_indent() << "render "
+ << ' '
+ << (*i)
+ << ' '
+ << (*i)->whatami()
+ << ' '
+ << (*i)->name
+ << " item "
+ << item_bbox.get()
+ << " window = "
+ << item
+ << " intersect = "
+ << draw
+ << " @ "
+ << _position
+ << endl;
+ }
+ }
+#endif
+
+ (*i)->render (area, context);
+ ++render_count;
+ }
+
+ } else {
+
+#ifdef CANVAS_DEBUG
+ if (DEBUG_ENABLED(PBD::DEBUG::CanvasRender)) {
+ cerr << string_compose ("%1skip render of %2 %3, no intersection between %4 and %5\n", _canvas->render_indent(), (*i)->whatami(),
+ (*i)->name, item, area);
+ }
+#endif
+
+ }
+ }
+
+ --render_depth;
+}
+
+void
+Item::add_child_bounding_boxes() const
+{
+ boost::optional<Rect> self;
+ Rect bbox;
+ bool have_one = false;
+
+ if (_bounding_box) {
+ bbox = _bounding_box.get();
+ have_one = true;
+ }
+
+ for (list<Item*>::const_iterator i = _items.begin(); i != _items.end(); ++i) {
+
+ boost::optional<Rect> item_bbox = (*i)->bounding_box ();
+
+ if (!item_bbox) {
+ continue;
+ }
+
+ Rect group_bbox = (*i)->item_to_parent (item_bbox.get ());
+ if (have_one) {
+ bbox = bbox.extend (group_bbox);
+ } else {
+ bbox = group_bbox;
+ have_one = true;
+ }
+ }
+
+ if (!have_one) {
+ _bounding_box = boost::optional<Rect> ();
+ } else {
+ _bounding_box = bbox;
+ }
+}
+
+void
+Item::add (Item* i)
+{
+ /* XXX should really notify canvas about this */
+
+ _items.push_back (i);
+ i->reparent (this);
+ invalidate_lut ();
+ _bounding_box_dirty = true;
+}
+
+void
+Item::remove (Item* i)
+{
+
+ if (i->parent() != this) {
+ return;
+ }
+
+ /* we cannot call bounding_box() here because that will iterate over
+ _items, one of which (the argument, i) may be in the middle of
+ deletion, making it impossible to call compute_bounding_box()
+ on it.
+ */
+
+ if (_bounding_box) {
+ _pre_change_bounding_box = _bounding_box;
+ } else {
+ _pre_change_bounding_box = Rect();
+ }
+
+ i->unparent ();
+ _items.remove (i);
+ invalidate_lut ();
+ _bounding_box_dirty = true;
+
+ end_change ();
+}
+
+void
+Item::clear (bool with_delete)
+{
+ begin_change ();
+
+ clear_items (with_delete);
+
+ invalidate_lut ();
+ _bounding_box_dirty = true;
+
+ end_change ();
+}
+
+void
+Item::clear_items (bool with_delete)
+{
+ for (list<Item*>::iterator i = _items.begin(); i != _items.end(); ) {
+
+ list<Item*>::iterator tmp = i;
+ Item *item = *i;
+
+ ++tmp;
+
+ /* remove from list before doing anything else, because we
+ * don't want to find the item in _items during any activity
+ * driven by unparent-ing or deletion.
+ */
+
+ _items.erase (i);
+ item->unparent ();
+
+ if (with_delete) {
+ delete item;
+ }
+
+ i = tmp;
+ }
+}
+
+void
+Item::raise_child_to_top (Item* i)
+{
+ if (!_items.empty()) {
+ if (_items.back() == i) {
+ return;
+ }
+ }
+
+ _items.remove (i);
+ _items.push_back (i);
+ invalidate_lut ();
+}
+
+void
+Item::raise_child (Item* i, int levels)
+{
+ list<Item*>::iterator j = find (_items.begin(), _items.end(), i);
+ assert (j != _items.end ());
+
+ ++j;
+ _items.remove (i);
+
+ while (levels > 0 && j != _items.end ()) {
+ ++j;
+ --levels;
+ }
+
+ _items.insert (j, i);
+ invalidate_lut ();
+}
+
+void
+Item::lower_child_to_bottom (Item* i)
+{
+ if (!_items.empty()) {
+ if (_items.front() == i) {
+ return;
+ }
+ }
+ _items.remove (i);
+ _items.push_front (i);
+ invalidate_lut ();
+}
+
+void
+Item::ensure_lut () const
+{
+ if (!_lut) {
+ _lut = new DumbLookupTable (*this);
+ }
+}
+
+void
+Item::invalidate_lut () const
+{
+ delete _lut;
+ _lut = 0;
+}
+
+void
+Item::child_changed ()
+{
+ invalidate_lut ();
+ _bounding_box_dirty = true;
+
+ if (_parent) {
+ _parent->child_changed ();
+ }
+}
+
+void
+Item::add_items_at_point (Duple const point, vector<Item const *>& items) const
+{
+ boost::optional<Rect> const bbox = bounding_box ();
+
+ /* Point is in window coordinate system */
+
+ if (!bbox || !item_to_window (bbox.get()).contains (point)) {
+ return;
+ }
+
+ /* recurse and add any items within our group that contain point.
+ Our children are only considered visible if we are, and similarly
+ only if we do not ignore events.
+ */
+
+ vector<Item*> our_items;
+
+ if (!_items.empty() && visible() && !_ignore_events) {
+ ensure_lut ();
+ our_items = _lut->items_at_point (point);
+ }
+
+ if (!our_items.empty() || covers (point)) {
+ /* this adds this item itself to the list of items at point */
+ items.push_back (this);
+ }
+
+ for (vector<Item*>::iterator i = our_items.begin(); i != our_items.end(); ++i) {
+ (*i)->add_items_at_point (point, items);
+ }
+}
+
+void
+Item::dump (ostream& o) const
+{
+ boost::optional<ArdourCanvas::Rect> bb = bounding_box();
+
+ o << _canvas->indent() << whatami() << ' ' << this << " Visible ? " << _visible;
+ o << " @ " << position();
+
+#ifdef CANVAS_DEBUG
+ if (!name.empty()) {
+ o << ' ' << name;
+ }
+#endif
+
+ if (bb) {
+ o << endl << _canvas->indent() << "\tbbox: " << bb.get();
+ o << endl << _canvas->indent() << "\tCANVAS bbox: " << item_to_canvas (bb.get());
+ } else {
+ o << " bbox unset";
+ }
+
+ o << endl;
+
+ if (!_items.empty()) {
+
+#ifdef CANVAS_DEBUG
+ o << _canvas->indent();
+ o << " @ " << position();
+ o << " Items: " << _items.size();
+ o << " Visible ? " << _visible;
+
+ boost::optional<Rect> bb = bounding_box();
+
+ if (bb) {
+ o << endl << _canvas->indent() << " bbox: " << bb.get();
+ o << endl << _canvas->indent() << " CANVAS bbox: " << item_to_canvas (bb.get());
+ } else {
+ o << " bbox unset";
+ }
+
+ o << endl;
+#endif
+
+ ArdourCanvas::dump_depth++;
+
+ for (list<Item*>::const_iterator i = _items.begin(); i != _items.end(); ++i) {
+ o << **i;
+ }
+
+ ArdourCanvas::dump_depth--;
+ }
+}
+
ostream&
ArdourCanvas::operator<< (ostream& o, const Item& i)
{
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