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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> | |
9 | // Licence: wxWindows license | |
10 | /////////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | #ifndef _WX_MSW_ENHMETA_H_ | |
13 | #define _WX_MSW_ENHMETA_H_ | |
14 | ||
15 | #ifdef __GNUG__ | |
16 | #pragma interface "enhmeta.h" | |
17 | #endif | |
18 | ||
19 | #include "wx/dc.h" | |
20 | ||
21 | #if wxUSE_DRAG_AND_DROP | |
22 | #include "wx/dataobj.h" | |
23 | #endif | |
24 | ||
25 | // ---------------------------------------------------------------------------- | |
26 | // wxEnhMetaFile: encapsulation of Win32 HENHMETAFILE | |
27 | // ---------------------------------------------------------------------------- | |
28 | ||
29 | class WXDLLEXPORT wxEnhMetaFile : public wxObject | |
30 | { | |
31 | public: | |
32 | wxEnhMetaFile(const wxString& file = wxEmptyString) : m_filename(file) | |
33 | { Init(); } | |
34 | wxEnhMetaFile(const wxEnhMetaFile& metafile) | |
35 | { Init(); Assign(metafile); } | |
36 | wxEnhMetaFile& operator=(const wxEnhMetaFile& metafile) | |
37 | { Free(); Assign(metafile); return *this; } | |
38 | ||
39 | virtual ~wxEnhMetaFile() | |
40 | { Free(); } | |
41 | ||
42 | // display the picture stored in the metafile on the given DC | |
43 | bool Play(wxDC *dc, wxRect *rectBound = (wxRect *)NULL); | |
44 | ||
45 | // accessors | |
46 | bool Ok() const { return m_hMF != 0; } | |
47 | ||
48 | wxSize GetSize() const; | |
49 | int GetWidth() const { return GetSize().x; } | |
50 | int GetHeight() const { return GetSize().y; } | |
51 | ||
52 | const wxString& GetFileName() const { return m_filename; } | |
53 | ||
54 | // implementation | |
55 | WXHANDLE GetHENHMETAFILE() const { return m_hMF; } | |
56 | void SetHENHMETAFILE(WXHANDLE hMF) { Free(); m_hMF = hMF; } | |
57 | ||
58 | protected: | |
59 | void Init() { m_hMF = 0; } | |
60 | void Free(); | |
61 | void Assign(const wxEnhMetaFile& mf); | |
62 | ||
63 | private: | |
64 | wxString m_filename; | |
65 | WXHANDLE m_hMF; | |
66 | ||
67 | DECLARE_DYNAMIC_CLASS(wxEnhMetaFile) | |
68 | }; | |
69 | ||
70 | // ---------------------------------------------------------------------------- | |
71 | // wxEnhMetaFileDC: allows to create a wxEnhMetaFile | |
72 | // ---------------------------------------------------------------------------- | |
73 | ||
74 | class WXDLLEXPORT wxEnhMetaFileDC : public wxDC | |
75 | { | |
76 | public: | |
77 | // the ctor parameters specify the filename (empty for memory metafiles), | |
78 | // the metafile picture size and the optional description/comment | |
79 | wxEnhMetaFileDC(const wxString& filename = wxEmptyString, | |
80 | int width = 0, int height = 0, | |
81 | const wxString& description = wxEmptyString); | |
82 | ||
83 | virtual ~wxEnhMetaFileDC(); | |
84 | ||
85 | // obtain a pointer to the new metafile (caller should delete it) | |
86 | wxEnhMetaFile *Close(); | |
87 | ||
88 | private: | |
89 | DECLARE_DYNAMIC_CLASS(wxEnhMetaFileDC) | |
90 | }; | |
91 | ||
92 | // ---------------------------------------------------------------------------- | |
93 | // wxEnhMetaFileDataObject is a specialization of wxDataObject for enh metafile | |
94 | // ---------------------------------------------------------------------------- | |
95 | ||
96 | #if wxUSE_DRAG_AND_DROP | |
97 | ||
98 | // notice that we want to support both CF_METAFILEPICT and CF_ENHMETAFILE and | |
99 | // so we derive from and not from wxDataObjectSimple | |
100 | class WXDLLEXPORT wxEnhMetaFileDataObject : public wxDataObject | |
101 | { | |
102 | public: | |
103 | // ctors | |
104 | wxEnhMetaFileDataObject() { } | |
105 | wxEnhMetaFileDataObject(const wxEnhMetaFile& metafile) | |
106 | : m_metafile(metafile) { } | |
107 | ||
108 | // virtual functions which you may override if you want to provide data on | |
109 | // demand only - otherwise, the trivial default versions will be used | |
110 | virtual void SetMetafile(const wxEnhMetaFile& metafile) | |
111 | { m_metafile = metafile; } | |
112 | virtual wxEnhMetaFile GetMetafile() const | |
113 | { return m_metafile; } | |
114 | ||
115 | // implement base class pure virtuals | |
116 | virtual wxDataFormat GetPreferredFormat(Direction dir) const; | |
117 | virtual size_t GetFormatCount(Direction dir) const; | |
118 | virtual void GetAllFormats(wxDataFormat *formats, Direction dir) const; | |
119 | virtual size_t GetDataSize(const wxDataFormat& format) const; | |
120 | virtual bool GetDataHere(const wxDataFormat& format, void *buf) const; | |
121 | virtual bool SetData(const wxDataFormat& format, size_t len, | |
122 | const void *buf); | |
123 | ||
124 | protected: | |
125 | wxEnhMetaFile m_metafile; | |
126 | }; | |
127 | ||
128 | #endif // wxUSE_DRAG_AND_DROP | |
129 | ||
130 | #endif // _WX_MSW_ENHMETA_H_ |