diff options
Diffstat (limited to 'libs/canvas/poly_item.cc')
-rw-r--r-- | libs/canvas/poly_item.cc | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/libs/canvas/poly_item.cc b/libs/canvas/poly_item.cc new file mode 100644 index 0000000000..1fb2c6c8b8 --- /dev/null +++ b/libs/canvas/poly_item.cc @@ -0,0 +1,101 @@ +#include <algorithm> +#include "pbd/xml++.h" +#include "pbd/compose.h" +#include "canvas/poly_item.h" + +using namespace std; +using namespace ArdourCanvas; + +PolyItem::PolyItem (Group* parent) + : Item (parent) + , Outline (parent) +{ + +} + +void +PolyItem::compute_bounding_box () const +{ + bool have_one = false; + + Rect bbox; + + for (Points::const_iterator i = _points.begin(); i != _points.end(); ++i) { + if (have_one) { + bbox.x0 = min (bbox.x0, i->x); + bbox.y0 = min (bbox.y0, i->y); + bbox.x1 = max (bbox.x1, i->x); + bbox.y1 = max (bbox.y1, i->y); + } else { + bbox.x0 = bbox.x1 = i->x; + bbox.y0 = bbox.y1 = i->y; + have_one = true; + } + } + + if (!have_one) { + _bounding_box = boost::optional<Rect> (); + } else { + _bounding_box = bbox.expand (_outline_width / 2); + } + + _bounding_box_dirty = false; +} + +void +PolyItem::render_path (Rect const & /*area*/, Cairo::RefPtr<Cairo::Context> context) const +{ + bool done_first = false; + for (Points::const_iterator i = _points.begin(); i != _points.end(); ++i) { + if (done_first) { + context->line_to (i->x, i->y); + } else { + context->move_to (i->x, i->y); + done_first = true; + } + } +} + +void +PolyItem::set (Points const & points) +{ + begin_change (); + + _points = points; + + _bounding_box_dirty = true; + end_change (); +} + +Points const & +PolyItem::get () const +{ + return _points; +} + +void +PolyItem::add_poly_item_state (XMLNode* node) const +{ + add_item_state (node); + + for (Points::const_iterator i = _points.begin(); i != _points.end(); ++i) { + XMLNode* p = new XMLNode ("Point"); + p->add_property ("x", string_compose ("%1", i->x)); + p->add_property ("y", string_compose ("%1", i->y)); + node->add_child_nocopy (*p); + } +} + +void +PolyItem::set_poly_item_state (XMLNode const * node) +{ + XMLNodeList const & children = node->children (); + for (XMLNodeList::const_iterator i = children.begin(); i != children.end(); ++i) { + Duple p; + p.x = atof ((*i)->property("x")->value().c_str()); + p.y = atof ((*i)->property("y")->value().c_str()); + _points.push_back (p); + } + + _bounding_box_dirty = true; +} |