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#include <iostream>
#include <cairomm/context.h>
#include "pbd/stacktrace.h"
#include "pbd/xml++.h"
#include "canvas/group.h"
#include "canvas/types.h"
#include "canvas/debug.h"
#include "canvas/item_factory.h"
#include "canvas/item.h"
#include "canvas/canvas.h"
using namespace std;
using namespace ArdourCanvas;
int Group::default_items_per_cell = 64;
Group::Group (Canvas* canvas)
: Item (canvas)
, _lut (0)
{
}
Group::Group (Group* parent)
: Item (parent)
, _lut (0)
{
}
Group::Group (Group* parent, Duple position)
: Item (parent, position)
, _lut (0)
{
}
Group::~Group ()
{
for (list<Item*>::iterator i = _items.begin(); i != _items.end(); ++i) {
(*i)->unparent ();
}
_items.clear ();
}
/** @param area Area to draw in this group's coordinates.
* @param context Context, set up with its origin at this group's position.
*/
void
Group::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
{
ensure_lut ();
vector<Item*> items = _lut->get (area);
for (vector<Item*>::const_iterator i = items.begin(); i != items.end(); ++i) {
if (!(*i)->visible ()) {
continue;
}
boost::optional<Rect> item_bbox = (*i)->bounding_box ();
if (!item_bbox) {
continue;
}
/* convert the render area to our child's coordinates */
Rect const item_area = (*i)->parent_to_item (area);
/* intersect the child's render area with the child's bounding box */
boost::optional<Rect> r = item_bbox.get().intersection (item_area);
if (r) {
/* render the intersection */
context->save ();
context->translate ((*i)->position().x, (*i)->position().y);
(*i)->render (r.get(), context);
context->restore ();
++render_count;
}
}
}
void
Group::compute_bounding_box () const
{
Rect bbox;
bool have_one = false;
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;
}
_bounding_box_dirty = false;
}
void
Group::add (Item* i)
{
_items.push_back (i);
invalidate_lut ();
_bounding_box_dirty = true;
DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: group add\n");
}
void
Group::remove (Item* i)
{
_items.remove (i);
invalidate_lut ();
_bounding_box_dirty = true;
DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: group remove\n");
}
void
Group::raise_child_to_top (Item* i)
{
_items.remove (i);
_items.push_back (i);
invalidate_lut ();
}
void
Group::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
Group::lower_child_to_bottom (Item* i)
{
_items.remove (i);
_items.push_front (i);
invalidate_lut ();
}
void
Group::ensure_lut () const
{
if (!_lut) {
_lut = new DumbLookupTable (*this);
}
}
void
Group::invalidate_lut () const
{
delete _lut;
_lut = 0;
}
void
Group::child_changed ()
{
invalidate_lut ();
_bounding_box_dirty = true;
if (_parent) {
_parent->child_changed ();
}
}
void
Group::add_items_at_point (Duple const point, vector<Item const *>& items) const
{
boost::optional<Rect> const bbox = bounding_box ();
if (!bbox || !bbox.get().contains (point)) {
return;
}
Item::add_items_at_point (point, items);
ensure_lut ();
vector<Item*> our_items = _lut->items_at_point (point);
for (vector<Item*>::iterator i = our_items.begin(); i != our_items.end(); ++i) {
(*i)->add_items_at_point (point - (*i)->position(), items);
}
}
XMLNode *
Group::get_state () const
{
XMLNode* node = new XMLNode ("Group");
for (list<Item*>::const_iterator i = _items.begin(); i != _items.end(); ++i) {
node->add_child_nocopy (*(*i)->get_state ());
}
add_item_state (node);
return node;
}
void
Group::set_state (XMLNode const * node)
{
set_item_state (node);
XMLNodeList const & children = node->children ();
for (XMLNodeList::const_iterator i = children.begin(); i != children.end(); ++i) {
/* this will create the item and add it to this group */
create_item (this, *i);
}
}
void
Group::dump (ostream& o) const
{
o << _canvas->indent();
o << "Group " << this;
o << " Items: " << _items.size();
boost::optional<Rect> bb = bounding_box();
if (bb) {
o << endl << _canvas->indent() << " bbox: " << bb.get();
} else {
o << " bbox unset";
}
o << endl;
ArdourCanvas::dump_depth++;
for (list<Item*>::const_iterator i = _items.begin(); i != _items.end(); ++i) {
o << **i;
}
ArdourCanvas::dump_depth--;
}
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