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#include <algorithm>
#include "pbd/xml++.h"
#include "pbd/compose.h"
#include "canvas/poly_item.h"
#include "canvas/canvas.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::render_curve (Rect const & area, Cairo::RefPtr<Cairo::Context> context, Points const & first_control_points, Points const & second_control_points) const
{
bool done_first = false;
if (_points.size() <= 2) {
render_path (area, context);
return;
}
Points::const_iterator cp1 = first_control_points.begin();
Points::const_iterator cp2 = second_control_points.begin();
for (Points::const_iterator i = _points.begin(); i != _points.end(); ++i) {
if (done_first) {
context->curve_to (cp1->x, cp1->y,
cp2->x, cp2->y,
i->x, i->y);
cp1++;
cp2++;
} 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::dump (ostream& o) const
{
Item::dump (o);
o << _canvas->indent() << '\t' << _points.size() << " points" << endl;
for (Points::const_iterator i = _points.begin(); i != _points.end(); ++i) {
o << _canvas->indent() << "\t\t" << i->x << ", " << i->y << endl;
}
}
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