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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: metafile.h
3 // Purpose: wxMetaFile, wxMetaFileDC classes.
4 // This probably should be restricted to Windows platforms,
5 // but if there is an equivalent on your platform, great.
6 // Author: David Webster
7 // Modified by:
8 // Created: 10/10/99
9 // RCS-ID: $Id$
10 // Copyright: (c) David Webster
11 // Licence: wxWindows licence
12 /////////////////////////////////////////////////////////////////////////////
13
14
15 #ifndef _WX_METAFIILE_H_
16 #define _WX_METAFIILE_H_
17
18 #include "wx/dc.h"
19 #include "wx/gdiobj.h"
20
21 #if wxUSE_DRAG_AND_DROP
22 #include "wx/dataobj.h"
23 #endif
24
25 /*
26 * Metafile and metafile device context classes
27 *
28 */
29
30 #define wxMetaFile wxMetafile
31 #define wxMetaFileDC wxMetafileDC
32
33 class WXDLLIMPEXP_FWD_CORE wxMetafile;
34
35 class WXDLLEXPORT wxMetafileRefData: public wxGDIRefData
36 {
37 friend class WXDLLIMPEXP_FWD_CORE wxMetafile;
38 public:
39 wxMetafileRefData(void);
40 virtual ~wxMetafileRefData(void);
41
42 public:
43 WXHANDLE m_metafile;
44 int m_windowsMappingMode;
45 };
46
47 #define M_METAFILEDATA ((wxMetafileRefData *)m_refData)
48
49 class WXDLLEXPORT wxMetafile: public wxGDIObject
50 {
51 DECLARE_DYNAMIC_CLASS(wxMetafile)
52 public:
53 wxMetafile(const wxString& file = wxEmptyString);
54 virtual ~wxMetafile(void);
55
56 // After this is called, the metafile cannot be used for anything
57 // since it is now owned by the clipboard.
58 virtual bool SetClipboard(int width = 0, int height = 0);
59
60 virtual bool Play(wxDC *dc);
61 inline bool Ok() const { return IsOk(); }
62 inline bool IsOk(void) const { return (M_METAFILEDATA && (M_METAFILEDATA->m_metafile != 0)); };
63
64 // Implementation
65 inline WXHANDLE GetHMETAFILE(void) { return M_METAFILEDATA->m_metafile; }
66 void SetHMETAFILE(WXHANDLE mf) ;
67 inline int GetWindowsMappingMode(void) { return M_METAFILEDATA->m_windowsMappingMode; }
68 void SetWindowsMappingMode(int mm);
69 };
70
71 class WXDLLEXPORT wxMetafileDC: public wxDC
72 {
73 DECLARE_DYNAMIC_CLASS(wxMetafileDC)
74
75 public:
76 // Don't supply origin and extent
77 // Supply them to wxMakeMetaFilePlaceable instead.
78 wxMetafileDC(const wxString& file = wxEmptyString);
79
80 // Supply origin and extent (recommended).
81 // Then don't need to supply them to wxMakeMetaFilePlaceable.
82 wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
83
84 virtual ~wxMetafileDC(void);
85
86 // Should be called at end of drawing
87 virtual wxMetafile *Close(void);
88 virtual void SetMapMode(int mode);
89 virtual void GetTextExtent(const wxString& string, long *x, long *y,
90 long *descent = NULL, long *externalLeading = NULL,
91 const wxFont *theFont = NULL, bool use16bit = false) const;
92
93 // Implementation
94 inline wxMetafile *GetMetaFile(void) const { return m_metaFile; }
95 inline void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
96 inline int GetWindowsMappingMode(void) const { return m_windowsMappingMode; }
97 inline void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
98
99 protected:
100 int m_windowsMappingMode;
101 wxMetafile* m_metaFile;
102
103 private:
104 #ifndef __WATCOMC__
105 // function hiding warning supression
106 // still required ??
107 inline virtual void GetTextExtent( const wxString& string
108 ,long* width
109 ,long* height
110 ,long* descent = NULL
111 ,long* externalLeading = NULL
112 ,wxFont* theFont = NULL
113 ) const
114 { GetTextExtent( string, width, height, descent, externalLeading, theFont, false);};
115 #endif
116 };
117
118 /*
119 * Pass filename of existing non-placeable metafile, and bounding box.
120 * Adds a placeable metafile header, sets the mapping mode to anisotropic,
121 * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
122 *
123 */
124
125 // No origin or extent
126 #define wxMakeMetaFilePlaceable wxMakeMetafilePlaceable
127 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
128
129 // Optional origin and extent
130 bool WXDLLEXPORT wxMakeMetaFilePlaceable( const wxString& filename
131 ,int x1
132 ,int y1
133 ,int x2
134 ,int y2
135 ,float scale = 1.0
136 ,bool useOriginAndExtent = true
137 );
138
139 // ----------------------------------------------------------------------------
140 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
141 // ----------------------------------------------------------------------------
142
143 // TODO: implement OLE side of things. At present, it's just for clipboard
144 // use.
145
146 #if wxUSE_DRAG_AND_DROP
147 class WXDLLEXPORT wxMetafileDataObject : public wxDataObject
148 {
149 public:
150 // ctors
151 wxMetafileDataObject() { m_width = 0; m_height = 0; };
152 wxMetafileDataObject(const wxMetafile& metafile, int width = 0,int height = 0)
153 :m_metafile(metafile)
154 ,m_width(width)
155 ,m_height(height) { }
156
157 void SetMetafile(const wxMetafile& metafile, int w = 0, int h = 0)
158 { m_metafile = metafile; m_width = w; m_height = h; }
159 wxMetafile GetMetafile() const { return m_metafile; }
160 int GetWidth() const { return m_width; }
161 int GetHeight() const { return m_height; }
162
163 virtual wxDataFormat GetFormat() const { return wxDF_METAFILE; }
164
165 /* ??
166 // implement base class pure virtuals
167 virtual wxDataFormat GetPreferredFormat() const
168 { return (wxDataFormat) wxDataObject::Text; }
169 virtual bool IsSupportedFormat(wxDataFormat format) const
170 { return format == wxDataObject::Text || format == wxDataObject::Locale; }
171 virtual size_t GetDataSize() const
172 { return m_strText.Len() + 1; } // +1 for trailing '\0'of course
173 virtual void GetDataHere(void *pBuf) const
174 { memcpy(pBuf, m_strText.c_str(), GetDataSize()); }
175 */
176
177 private:
178 wxMetafile m_metafile;
179 int m_width;
180 int m_height;
181 };
182 #endif
183
184 #endif
185 // _WX_METAFIILE_H_