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1///////////////////////////////////////////////////////////////////////////////
2// Name: wx/msw/enhmeta.h
3// Purpose: wxEnhMetaFile class for Win32
4// Author: Vadim Zeitlin
5// Modified by:
6// Created: 13.01.00
7// RCS-ID: $Id$
8// Copyright: (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
65571936 9// Licence: wxWindows licence
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10///////////////////////////////////////////////////////////////////////////////
11
12#ifndef _WX_MSW_ENHMETA_H_
13#define _WX_MSW_ENHMETA_H_
14
d9317fd4 15#include "wx/dc.h"
8f884a0d 16#include "wx/gdiobj.h"
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17
18#if wxUSE_DRAG_AND_DROP
19 #include "wx/dataobj.h"
20#endif
21
22// ----------------------------------------------------------------------------
23// wxEnhMetaFile: encapsulation of Win32 HENHMETAFILE
24// ----------------------------------------------------------------------------
25
53a2db12 26class WXDLLIMPEXP_CORE wxEnhMetaFile : public wxGDIObject
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27{
28public:
29 wxEnhMetaFile(const wxString& file = wxEmptyString) : m_filename(file)
30 { Init(); }
8f884a0d 31 wxEnhMetaFile(const wxEnhMetaFile& metafile) : wxGDIObject()
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32 { Init(); Assign(metafile); }
33 wxEnhMetaFile& operator=(const wxEnhMetaFile& metafile)
34 { Free(); Assign(metafile); return *this; }
35
36 virtual ~wxEnhMetaFile()
37 { Free(); }
38
39 // display the picture stored in the metafile on the given DC
d3b9f782 40 bool Play(wxDC *dc, wxRect *rectBound = NULL);
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41
42 // accessors
8f884a0d 43 virtual bool IsOk() const { return m_hMF != 0; }
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44
45 wxSize GetSize() const;
46 int GetWidth() const { return GetSize().x; }
47 int GetHeight() const { return GetSize().y; }
48
49 const wxString& GetFileName() const { return m_filename; }
50
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51 // copy the metafile to the clipboard: the width and height parameters are
52 // for backwards compatibility (with wxMetaFile) only, they are ignored by
53 // this method
54 bool SetClipboard(int width = 0, int height = 0);
55
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56 // implementation
57 WXHANDLE GetHENHMETAFILE() const { return m_hMF; }
58 void SetHENHMETAFILE(WXHANDLE hMF) { Free(); m_hMF = hMF; }
59
60protected:
7a295dfa 61 void Init();
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62 void Free();
63 void Assign(const wxEnhMetaFile& mf);
64
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65 // we don't use these functions (but probably should) but have to implement
66 // them as they're pure virtual in the base class
67 virtual wxGDIRefData *CreateGDIRefData() const;
68 virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const;
69
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70private:
71 wxString m_filename;
72 WXHANDLE m_hMF;
73
74 DECLARE_DYNAMIC_CLASS(wxEnhMetaFile)
75};
76
77// ----------------------------------------------------------------------------
78// wxEnhMetaFileDC: allows to create a wxEnhMetaFile
79// ----------------------------------------------------------------------------
80
53a2db12 81class WXDLLIMPEXP_CORE wxEnhMetaFileDC : public wxDC
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82{
83public:
84 // the ctor parameters specify the filename (empty for memory metafiles),
85 // the metafile picture size and the optional description/comment
86 wxEnhMetaFileDC(const wxString& filename = wxEmptyString,
87 int width = 0, int height = 0,
88 const wxString& description = wxEmptyString);
89
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90 // as above, but takes reference DC as first argument to take resolution,
91 // size, font metrics etc. from
fb4faeb5 92 wxEXPLICIT
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93 wxEnhMetaFileDC(const wxDC& referenceDC,
94 const wxString& filename = wxEmptyString,
95 int width = 0, int height = 0,
96 const wxString& description = wxEmptyString);
97
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98 // obtain a pointer to the new metafile (caller should delete it)
99 wxEnhMetaFile *Close();
100
101private:
2eb10e2a 102 DECLARE_DYNAMIC_CLASS_NO_COPY(wxEnhMetaFileDC)
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103};
104
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105#if wxUSE_DRAG_AND_DROP
106
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107// ----------------------------------------------------------------------------
108// wxEnhMetaFileDataObject is a specialization of wxDataObject for enh metafile
109// ----------------------------------------------------------------------------
110
d9317fd4 111// notice that we want to support both CF_METAFILEPICT and CF_ENHMETAFILE and
bfbd6dc1 112// so we derive from wxDataObject and not from wxDataObjectSimple
53a2db12 113class WXDLLIMPEXP_CORE wxEnhMetaFileDataObject : public wxDataObject
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114{
115public:
116 // ctors
117 wxEnhMetaFileDataObject() { }
118 wxEnhMetaFileDataObject(const wxEnhMetaFile& metafile)
119 : m_metafile(metafile) { }
120
121 // virtual functions which you may override if you want to provide data on
122 // demand only - otherwise, the trivial default versions will be used
123 virtual void SetMetafile(const wxEnhMetaFile& metafile)
124 { m_metafile = metafile; }
125 virtual wxEnhMetaFile GetMetafile() const
126 { return m_metafile; }
127
128 // implement base class pure virtuals
129 virtual wxDataFormat GetPreferredFormat(Direction dir) const;
130 virtual size_t GetFormatCount(Direction dir) const;
131 virtual void GetAllFormats(wxDataFormat *formats, Direction dir) const;
132 virtual size_t GetDataSize(const wxDataFormat& format) const;
133 virtual bool GetDataHere(const wxDataFormat& format, void *buf) const;
134 virtual bool SetData(const wxDataFormat& format, size_t len,
135 const void *buf);
136
137protected:
138 wxEnhMetaFile m_metafile;
2eb10e2a 139
c0c133e1 140 wxDECLARE_NO_COPY_CLASS(wxEnhMetaFileDataObject);
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141};
142
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143
144// ----------------------------------------------------------------------------
145// wxEnhMetaFileSimpleDataObject does derive from wxDataObjectSimple which
146// makes it more convenient to use (it can be used with wxDataObjectComposite)
147// at the price of not supoprting any more CF_METAFILEPICT but only
148// CF_ENHMETAFILE
149// ----------------------------------------------------------------------------
150
53a2db12 151class WXDLLIMPEXP_CORE wxEnhMetaFileSimpleDataObject : public wxDataObjectSimple
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152{
153public:
154 // ctors
155 wxEnhMetaFileSimpleDataObject() : wxDataObjectSimple(wxDF_ENHMETAFILE) { }
156 wxEnhMetaFileSimpleDataObject(const wxEnhMetaFile& metafile)
157 : wxDataObjectSimple(wxDF_ENHMETAFILE), m_metafile(metafile) { }
158
159 // virtual functions which you may override if you want to provide data on
160 // demand only - otherwise, the trivial default versions will be used
161 virtual void SetEnhMetafile(const wxEnhMetaFile& metafile)
162 { m_metafile = metafile; }
163 virtual wxEnhMetaFile GetEnhMetafile() const
164 { return m_metafile; }
165
166 // implement base class pure virtuals
167 virtual size_t GetDataSize() const;
168 virtual bool GetDataHere(void *buf) const;
169 virtual bool SetData(size_t len, const void *buf);
170
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171 virtual size_t GetDataSize(const wxDataFormat& WXUNUSED(format)) const
172 { return GetDataSize(); }
173 virtual bool GetDataHere(const wxDataFormat& WXUNUSED(format),
174 void *buf) const
175 { return GetDataHere(buf); }
176 virtual bool SetData(const wxDataFormat& WXUNUSED(format),
177 size_t len, const void *buf)
178 { return SetData(len, buf); }
179
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180protected:
181 wxEnhMetaFile m_metafile;
2eb10e2a 182
c0c133e1 183 wxDECLARE_NO_COPY_CLASS(wxEnhMetaFileSimpleDataObject);
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184};
185
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186#endif // wxUSE_DRAG_AND_DROP
187
188#endif // _WX_MSW_ENHMETA_H_