102 lines
2.0 KiB
C++
102 lines
2.0 KiB
C++
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#include <algorithm>
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#include "pbd/xml++.h"
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#include "pbd/compose.h"
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#include "canvas/poly_item.h"
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using namespace std;
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using namespace ArdourCanvas;
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PolyItem::PolyItem (Group* parent)
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: Item (parent)
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, Outline (parent)
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{
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}
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void
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PolyItem::compute_bounding_box () const
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{
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bool have_one = false;
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Rect bbox;
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for (Points::const_iterator i = _points.begin(); i != _points.end(); ++i) {
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if (have_one) {
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bbox.x0 = min (bbox.x0, i->x);
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bbox.y0 = min (bbox.y0, i->y);
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bbox.x1 = max (bbox.x1, i->x);
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bbox.y1 = max (bbox.y1, i->y);
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} else {
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bbox.x0 = bbox.x1 = i->x;
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bbox.y0 = bbox.y1 = i->y;
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have_one = true;
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}
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}
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if (!have_one) {
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_bounding_box = boost::optional<Rect> ();
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} else {
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_bounding_box = bbox.expand (_outline_width / 2);
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}
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_bounding_box_dirty = false;
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}
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void
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PolyItem::render_path (Rect const & /*area*/, Cairo::RefPtr<Cairo::Context> context) const
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{
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bool done_first = false;
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for (Points::const_iterator i = _points.begin(); i != _points.end(); ++i) {
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if (done_first) {
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context->line_to (i->x, i->y);
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} else {
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context->move_to (i->x, i->y);
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done_first = true;
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}
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}
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}
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void
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PolyItem::set (Points const & points)
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{
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begin_change ();
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_points = points;
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_bounding_box_dirty = true;
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end_change ();
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}
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Points const &
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PolyItem::get () const
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{
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return _points;
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}
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void
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PolyItem::add_poly_item_state (XMLNode* node) const
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{
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add_item_state (node);
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for (Points::const_iterator i = _points.begin(); i != _points.end(); ++i) {
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XMLNode* p = new XMLNode ("Point");
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p->add_property ("x", string_compose ("%1", i->x));
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p->add_property ("y", string_compose ("%1", i->y));
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node->add_child_nocopy (*p);
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}
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}
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void
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PolyItem::set_poly_item_state (XMLNode const * node)
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{
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XMLNodeList const & children = node->children ();
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for (XMLNodeList::const_iterator i = children.begin(); i != children.end(); ++i) {
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Duple p;
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p.x = atof ((*i)->property("x")->value().c_str());
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p.y = atof ((*i)->property("y")->value().c_str());
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_points.push_back (p);
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}
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_bounding_box_dirty = true;
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}
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