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1/////////////////////////////////////////////////////////////////////////////
2// Name: wx/gtk/region.h
3// Purpose:
4// Author: Robert Roebling
5// Id: $Id$
6// Copyright: (c) 1998 Robert Roebling
7// Licence: wxWindows licence
8/////////////////////////////////////////////////////////////////////////////
9
10#ifndef _WX_GTK_REGION_H_
11#define _WX_GTK_REGION_H_
12
13#ifdef __GNUG__
14#pragma interface
15#endif
16
17#include "wx/list.h"
18#include "wx/gdiobj.h"
19#include "wx/gdicmn.h"
20
21//-----------------------------------------------------------------------------
22// classes
23//-----------------------------------------------------------------------------
24
25class wxRegion;
26
27//-----------------------------------------------------------------------------
28// constants
29//-----------------------------------------------------------------------------
30
31enum wxRegionContain
32{
33 wxOutRegion = 0,
34 wxPartRegion = 1,
35 wxInRegion = 2
36};
37
38// So far, for internal use only
39enum wxRegionOp
40{
41 wxRGN_AND, // Creates the intersection of the two combined regions.
42 wxRGN_COPY, // Creates a copy of the region identified by hrgnSrc1.
43 wxRGN_DIFF, // Combines the parts of hrgnSrc1 that are not part of hrgnSrc2.
44 wxRGN_OR, // Creates the union of two combined regions.
45 wxRGN_XOR // Creates the union of two combined regions except for any overlapping areas.
46};
47
48// ----------------------------------------------------------------------------
49// wxRegion
50// ----------------------------------------------------------------------------
51
52class wxRegion : public wxGDIObject
53{
54public:
55 wxRegion() { }
56
57 wxRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
58 {
59 InitRect(x, y, w, h);
60 }
61
62 wxRegion( const wxPoint& topLeft, const wxPoint& bottomRight )
63 {
64 InitRect(topLeft.x, topLeft.y,
65 bottomRight.x - topLeft.x, bottomRight.y - topLeft.y);
66 }
67
68 wxRegion( const wxRect& rect )
69 {
70 InitRect(rect.x, rect.y, rect.width, rect.height);
71 }
72
73 wxRegion( size_t n, const wxPoint *points, int fillStyle = wxODDEVEN_RULE );
74 ~wxRegion();
75
76 wxRegion( const wxRegion& region )
77 : wxGDIObject()
78 { Ref(region); }
79 wxRegion& operator = ( const wxRegion& region ) { Ref(region); return *this; }
80
81 bool Ok() const { return m_refData != NULL; }
82
83 bool operator == ( const wxRegion& region );
84 bool operator != ( const wxRegion& region ) { return !(*this == region); }
85
86 void Clear();
87
88 bool Offset( wxCoord x, wxCoord y );
89
90 bool Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height );
91 bool Union( const wxRect& rect );
92 bool Union( const wxRegion& region );
93
94 bool Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height );
95 bool Intersect( const wxRect& rect );
96 bool Intersect( const wxRegion& region );
97
98 bool Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height );
99 bool Subtract( const wxRect& rect );
100 bool Subtract( const wxRegion& region );
101
102 bool Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height );
103 bool Xor( const wxRect& rect );
104 bool Xor( const wxRegion& region );
105
106 void GetBox( wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h ) const;
107 wxRect GetBox() const ;
108
109 bool Empty() const;
110 bool IsEmpty() const { return Empty(); }
111
112 wxRegionContain Contains( wxCoord x, wxCoord y ) const;
113 wxRegionContain Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const;
114 wxRegionContain Contains(const wxPoint& pt) const;
115 wxRegionContain Contains(const wxRect& rect) const;
116
117public:
118 GdkRegion *GetRegion() const;
119
120protected:
121 // ref counting code
122 virtual wxObjectRefData *CreateRefData() const;
123 virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
124
125 // common part of ctors for a rectangle region
126 void InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
127
128private:
129 DECLARE_DYNAMIC_CLASS(wxRegion);
130};
131
132// ----------------------------------------------------------------------------
133// wxRegionIterator: decomposes a region into rectangles
134// ----------------------------------------------------------------------------
135
136class wxRegionIterator: public wxObject
137{
138public:
139 wxRegionIterator();
140 wxRegionIterator(const wxRegion& region);
141
142 void Reset() { m_current = 0u; }
143 void Reset(const wxRegion& region);
144
145 operator bool () const;
146 bool HaveRects() const;
147
148 void operator ++ ();
149 void operator ++ (int);
150
151 wxCoord GetX() const;
152 wxCoord GetY() const;
153 wxCoord GetW() const;
154 wxCoord GetWidth() const { return GetW(); }
155 wxCoord GetH() const;
156 wxCoord GetHeight() const { return GetH(); }
157 wxRect GetRect() const;
158
159private:
160 size_t m_current;
161 wxRegion m_region;
162
163private:
164 DECLARE_DYNAMIC_CLASS(wxRegionIterator);
165};
166
167
168#endif
169 // _WX_GTK_REGION_H_