1 #include "PolygonItem.h"
2 #include "IMapRender.h"
3
IsPointInsidePolygon(const Array<Point> & p,Point s)4 bool IsPointInsidePolygon(const Array<Point>& p, Point s)
5 {
6 int i, j;
7 bool parity = false;
8 for (i = 0, j = p.GetCount() - 1; i < p.GetCount(); j = i++)
9 {
10 if ( ( p[i].y < s.y && s.y <= p[j].y || p[j].y < s.y && s.y <= p[i].y )
11 && (s.x > (p[j].x - p[i].x) * (s.y - p[i].y) / (p[j].y - p[i].y) + p[i].x))
12 parity = !parity;
13 }
14 return parity;
15 }
16
RectOfFigure(const Array<Point> & p)17 Rect RectOfFigure(const Array<Point>& p)
18 {
19 if (!p.GetCount())
20 return Null;
21
22 Point s = Point(INT_MAX, INT_MAX);
23 Point e = Point(-1, -1);
24
25 for (int i = 0; i < p.GetCount(); i++)
26 {
27 s.x = min(p[i].x, s.x);
28 s.y = min(p[i].y, s.y);
29
30 e.x = max(p[i].x, e.x);
31 e.y = max(p[i].y, e.y);
32 }
33
34 return Rect(s, e);
35 }
36
CenterOfFigure(const Array<Point> & p)37 Point CenterOfFigure(const Array<Point>& p)
38 {
39 return RectOfFigure(p).CenterPoint();
40 }
41
TopLeftOfFigure(const Array<Point> & p)42 Point TopLeftOfFigure(const Array<Point>& p)
43 {
44 if (!p.GetCount())
45 return Null;
46
47 Point s = p[0];
48
49 for (int i = 1; i < p.GetCount(); i++)
50 {
51 if (s.x > p[i].x && s.y > p[i].y)
52 s = p[i];
53 }
54
55 return s;
56 }
57
PolygonItem(IMapRender * render)58 PolygonItem::PolygonItem(IMapRender* render)
59 : IMapItem(render), _display(new PolygonItemDisplay()), _stdDisplay(true)
60 {
61 }
62
63 Callback1<Ptr<PolygonItem> > PolygonItem::WhenClick;
64
~PolygonItem()65 PolygonItem::~PolygonItem()
66 {
67 if (_stdDisplay && _display)
68 delete _display;
69 }
70
SetDisplay(PolygonItemDisplay * disp)71 PolygonItem* PolygonItem::SetDisplay(PolygonItemDisplay* disp)
72 {
73 if (_stdDisplay && _display)
74 delete _display;
75 _display = disp;
76 return this;
77 }
78
GetRect()79 Rect PolygonItem::GetRect()
80 {
81 return RectOfFigure(GetVertices());
82 }
83
GetCenter()84 Point PolygonItem::GetCenter()
85 {
86 return CenterOfFigure(GetVertices());
87 }
88
GetTopLeft()89 Point PolygonItem::GetTopLeft()
90 {
91 return TopLeftOfFigure(GetVertices());
92 }
93
Contains(const Point & p)94 bool PolygonItem::Contains(const Point& p)
95 {
96 return IsPointInsidePolygon(GetVertices(), p);
97 }
98
Render(Draw * w)99 void PolygonItem::Render(Draw* w)
100 {
101 _display->Paint(w, this);
102 }
103
Paint(Draw * w,PolygonItem * item) const104 void PolygonItemDisplay::Paint(Draw* w, PolygonItem* item) const
105 {
106 if (!item->GetTopRender())
107 return;
108
109 Vector<Point> points;
110 for (int i = 0; i < item->GetVertices().GetCount(); ++i)
111 points << item->GetTopRender()->ViewToScene(item->GetVertices()[i]);
112
113 if (item->IsFound())
114 {
115 w->DrawPolygon(points,
116 item->IsSelected()
117 ? Yellow()
118 : LtRed(), 1, Black());
119 }
120
121 else if (item->IsSelected() && !item->IsFound())
122 w->DrawPolygon(points, Yellow(), 1, Black());
123
124 else if (item->IsState(STATE_EDIT))
125 w->DrawPolygon(points, Green(), 1, Black());
126 }
127