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[wxWidgets.git] / include / wx / msw / metafile.h
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: wx/msw/metafile.h
3 // Purpose: wxMetaFile, wxMetaFileDC and wxMetaFileDataObject classes
4 // Author: Julian Smart
5 // Modified by: VZ 07.01.00: implemented wxMetaFileDataObject
6 // Created: 01/02/97
7 // RCS-ID: $Id$
8 // Copyright: (c) Julian Smart
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 #ifndef _WX_METAFIILE_H_
13 #define _WX_METAFIILE_H_
14
15 #include "wx/dc.h"
16 #include "wx/gdiobj.h"
17
18 #if wxUSE_DRAG_AND_DROP
19 #include "wx/dataobj.h"
20 #endif
21
22 // ----------------------------------------------------------------------------
23 // Metafile and metafile device context classes
24 // ----------------------------------------------------------------------------
25
26 class WXDLLIMPEXP_FWD_CORE wxMetafile;
27
28 class WXDLLEXPORT wxMetafileRefData: public wxGDIRefData
29 {
30 friend class WXDLLIMPEXP_FWD_CORE wxMetafile;
31 public:
32 wxMetafileRefData();
33 virtual ~wxMetafileRefData();
34
35 public:
36 WXHANDLE m_metafile;
37 int m_windowsMappingMode;
38 int m_width, m_height;
39 };
40
41 #define M_METAFILEDATA ((wxMetafileRefData *)m_refData)
42
43 class WXDLLEXPORT wxMetafile: public wxGDIObject
44 {
45 public:
46 wxMetafile(const wxString& file = wxEmptyString);
47 virtual ~wxMetafile();
48
49 // After this is called, the metafile cannot be used for anything
50 // since it is now owned by the clipboard.
51 virtual bool SetClipboard(int width = 0, int height = 0);
52
53 virtual bool Play(wxDC *dc);
54 bool Ok() const { return IsOk(); }
55 bool IsOk() const { return (M_METAFILEDATA && (M_METAFILEDATA->m_metafile != 0)); };
56
57 // set/get the size of metafile for clipboard operations
58 wxSize GetSize() const { return wxSize(GetWidth(), GetHeight()); }
59 int GetWidth() const { return M_METAFILEDATA->m_width; }
60 int GetHeight() const { return M_METAFILEDATA->m_height; }
61
62 void SetWidth(int width) { M_METAFILEDATA->m_width = width; }
63 void SetHeight(int height) { M_METAFILEDATA->m_height = height; }
64
65 // Implementation
66 WXHANDLE GetHMETAFILE() const { return M_METAFILEDATA->m_metafile; }
67 void SetHMETAFILE(WXHANDLE mf) ;
68 int GetWindowsMappingMode() const { return M_METAFILEDATA->m_windowsMappingMode; }
69 void SetWindowsMappingMode(int mm);
70
71 private:
72 DECLARE_DYNAMIC_CLASS(wxMetafile)
73 };
74
75 class WXDLLEXPORT wxMetafileDC: public wxDC
76 {
77 public:
78 // Don't supply origin and extent
79 // Supply them to wxMakeMetaFilePlaceable instead.
80 wxMetafileDC(const wxString& file = wxEmptyString);
81
82 // Supply origin and extent (recommended).
83 // Then don't need to supply them to wxMakeMetaFilePlaceable.
84 wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
85
86 virtual ~wxMetafileDC();
87
88 // Should be called at end of drawing
89 virtual wxMetafile *Close();
90 virtual void SetMapMode(int mode);
91 virtual void DoGetTextExtent(const wxString& string,
92 wxCoord *x, wxCoord *y,
93 wxCoord *descent = NULL,
94 wxCoord *externalLeading = NULL,
95 const wxFont *theFont = NULL) const;
96
97 // Implementation
98 wxMetafile *GetMetaFile() const { return m_metaFile; }
99 void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
100 int GetWindowsMappingMode() const { return m_windowsMappingMode; }
101 void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
102
103 protected:
104 virtual void DoGetSize(int *width, int *height) const;
105
106 int m_windowsMappingMode;
107 wxMetafile* m_metaFile;
108
109 private:
110 DECLARE_DYNAMIC_CLASS(wxMetafileDC)
111 };
112
113 /*
114 * Pass filename of existing non-placeable metafile, and bounding box.
115 * Adds a placeable metafile header, sets the mapping mode to anisotropic,
116 * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
117 *
118 */
119
120 // No origin or extent
121 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
122
123 // Optional origin and extent
124 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = true);
125
126 // ----------------------------------------------------------------------------
127 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
128 // ----------------------------------------------------------------------------
129
130 #if wxUSE_DRAG_AND_DROP
131
132 class WXDLLEXPORT wxMetafileDataObject : public wxDataObjectSimple
133 {
134 public:
135 // ctors
136 wxMetafileDataObject() : wxDataObjectSimple(wxDF_METAFILE)
137 { }
138 wxMetafileDataObject(const wxMetafile& metafile)
139 : wxDataObjectSimple(wxDF_METAFILE), m_metafile(metafile) { }
140
141 // virtual functions which you may override if you want to provide data on
142 // demand only - otherwise, the trivial default versions will be used
143 virtual void SetMetafile(const wxMetafile& metafile)
144 { m_metafile = metafile; }
145 virtual wxMetafile GetMetafile() const
146 { return m_metafile; }
147
148 // implement base class pure virtuals
149 virtual size_t GetDataSize() const;
150 virtual bool GetDataHere(void *buf) const;
151 virtual bool SetData(size_t len, const void *buf);
152
153 protected:
154 wxMetafile m_metafile;
155 };
156
157 #endif // wxUSE_DRAG_AND_DROP
158
159 #endif
160 // _WX_METAFIILE_H_
161