1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
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;
}
|
