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1 | /////////////////////////////////////////////////////////////////////////////// | |
2 | // Name: msw/enhmeta.cpp | |
3 | // Purpose: implementation of wxEnhMetaFileXXX classes | |
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 licence | |
10 | /////////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | // ============================================================================ | |
13 | // declarations | |
14 | // ============================================================================ | |
15 | ||
16 | // ---------------------------------------------------------------------------- | |
17 | // headers | |
18 | // ---------------------------------------------------------------------------- | |
19 | ||
20 | #ifdef __GNUG__ | |
21 | #pragma implementation "enhmeta.h" | |
22 | #endif | |
23 | ||
24 | // For compilers that support precompilation, includes "wx.h". | |
25 | #include "wx/wxprec.h" | |
26 | ||
27 | #ifdef __BORLANDC__ | |
28 | #pragma hdrstop | |
29 | #endif | |
30 | ||
31 | #if wxUSE_ENH_METAFILE | |
32 | ||
33 | #ifndef WX_PRECOMP | |
34 | #include "wx/string.h" | |
35 | #include "wx/log.h" | |
36 | #endif //WX_PRECOMP | |
37 | ||
38 | #include "wx/metafile.h" | |
39 | #include "wx/clipbrd.h" | |
40 | ||
41 | #include "wx/msw/private.h" | |
42 | ||
43 | // ---------------------------------------------------------------------------- | |
44 | // wxWin macros | |
45 | // ---------------------------------------------------------------------------- | |
46 | ||
47 | IMPLEMENT_DYNAMIC_CLASS(wxEnhMetaFile, wxObject) | |
48 | IMPLEMENT_ABSTRACT_CLASS(wxEnhMetaFileDC, wxDC) | |
49 | ||
50 | // ---------------------------------------------------------------------------- | |
51 | // macros | |
52 | // ---------------------------------------------------------------------------- | |
53 | ||
54 | #define GetEMF() ((HENHMETAFILE)m_hMF) | |
55 | #define GetEMFOf(mf) ((HENHMETAFILE)((mf).m_hMF)) | |
56 | ||
57 | // ---------------------------------------------------------------------------- | |
58 | // private functions | |
59 | // ---------------------------------------------------------------------------- | |
60 | ||
61 | // we must pass NULL if the string is empty to metafile functions | |
62 | static inline const wxChar *GetMetaFileName(const wxString& fn) | |
63 | { return !fn ? (wxChar *)NULL : fn.c_str(); } | |
64 | ||
65 | // ============================================================================ | |
66 | // implementation | |
67 | // ============================================================================ | |
68 | ||
69 | // ---------------------------------------------------------------------------- | |
70 | // wxEnhMetaFile | |
71 | // ---------------------------------------------------------------------------- | |
72 | ||
73 | void wxEnhMetaFile::Assign(const wxEnhMetaFile& mf) | |
74 | { | |
75 | if ( &mf == this ) | |
76 | return; | |
77 | ||
78 | if ( mf.m_hMF ) | |
79 | { | |
80 | m_hMF = (WXHANDLE)::CopyEnhMetaFile(GetEMFOf(mf), | |
81 | GetMetaFileName(m_filename)); | |
82 | if ( !m_hMF ) | |
83 | { | |
84 | wxLogLastError(_T("CopyEnhMetaFile")); | |
85 | } | |
86 | } | |
87 | else | |
88 | { | |
89 | m_hMF = 0; | |
90 | } | |
91 | } | |
92 | ||
93 | void wxEnhMetaFile::Free() | |
94 | { | |
95 | if ( m_hMF ) | |
96 | { | |
97 | if ( !::DeleteEnhMetaFile(GetEMF()) ) | |
98 | { | |
99 | wxLogLastError(_T("DeleteEnhMetaFile")); | |
100 | } | |
101 | } | |
102 | } | |
103 | ||
104 | bool wxEnhMetaFile::Play(wxDC *dc, wxRect *rectBound) | |
105 | { | |
106 | wxCHECK_MSG( Ok(), FALSE, _T("can't play invalid enhanced metafile") ); | |
107 | wxCHECK_MSG( dc, FALSE, _T("invalid wxDC in wxEnhMetaFile::Play") ); | |
108 | ||
109 | RECT rect; | |
110 | if ( rectBound ) | |
111 | { | |
112 | rect.top = rectBound->y; | |
113 | rect.left = rectBound->x; | |
114 | rect.right = rectBound->x + rectBound->width; | |
115 | rect.bottom = rectBound->y + rectBound->height; | |
116 | } | |
117 | else | |
118 | { | |
119 | wxSize size = GetSize(); | |
120 | ||
121 | rect.top = | |
122 | rect.left = 0; | |
123 | rect.right = size.x; | |
124 | rect.bottom = size.y; | |
125 | } | |
126 | ||
127 | if ( !::PlayEnhMetaFile(GetHdcOf(*dc), GetEMF(), &rect) ) | |
128 | { | |
129 | wxLogLastError(_T("PlayEnhMetaFile")); | |
130 | ||
131 | return FALSE; | |
132 | } | |
133 | ||
134 | return TRUE; | |
135 | } | |
136 | ||
137 | wxSize wxEnhMetaFile::GetSize() const | |
138 | { | |
139 | wxSize size = wxDefaultSize; | |
140 | ||
141 | if ( Ok() ) | |
142 | { | |
143 | ENHMETAHEADER hdr; | |
144 | if ( !::GetEnhMetaFileHeader(GetEMF(), sizeof(hdr), &hdr) ) | |
145 | { | |
146 | wxLogLastError(_T("GetEnhMetaFileHeader")); | |
147 | } | |
148 | else | |
149 | { | |
150 | // the width and height are in HIMETRIC (0.01mm) units, transform | |
151 | // them to pixels | |
152 | LONG w = hdr.rclFrame.right, | |
153 | h = hdr.rclFrame.bottom; | |
154 | ||
155 | HIMETRICToPixel(&w, &h); | |
156 | ||
157 | size.x = w; | |
158 | size.y = h; | |
159 | } | |
160 | } | |
161 | ||
162 | return size; | |
163 | } | |
164 | ||
165 | bool wxEnhMetaFile::SetClipboard(int WXUNUSED(width), int WXUNUSED(height)) | |
166 | { | |
167 | #if wxUSE_DRAG_AND_DROP | |
168 | wxCHECK_MSG( m_hMF, FALSE, _T("can't copy invalid metafile to clipboard") ); | |
169 | ||
170 | return wxTheClipboard->AddData(new wxEnhMetaFileDataObject(*this)); | |
171 | #else // !wxUSE_DRAG_AND_DROP | |
172 | wxFAIL_MSG(_T("not implemented")); | |
173 | return FALSE; | |
174 | #endif // wxUSE_DRAG_AND_DROP/!wxUSE_DRAG_AND_DROP | |
175 | } | |
176 | ||
177 | // ---------------------------------------------------------------------------- | |
178 | // wxEnhMetaFileDC | |
179 | // ---------------------------------------------------------------------------- | |
180 | ||
181 | wxEnhMetaFileDC::wxEnhMetaFileDC(const wxString& filename, | |
182 | int width, int height, | |
183 | const wxString& description) | |
184 | { | |
185 | ScreenHDC hdcRef; | |
186 | RECT rect; | |
187 | RECT *pRect; | |
188 | if ( width && height ) | |
189 | { | |
190 | rect.top = | |
191 | rect.left = 0; | |
192 | rect.right = width; | |
193 | rect.bottom = height; | |
194 | ||
195 | // CreateEnhMetaFile() wants them in HIMETRIC | |
196 | PixelToHIMETRIC(&rect.right, &rect.bottom); | |
197 | ||
198 | pRect = ▭ | |
199 | } | |
200 | else | |
201 | { | |
202 | // GDI will try to find out the size for us (not recommended) | |
203 | pRect = (LPRECT)NULL; | |
204 | } | |
205 | ||
206 | m_hDC = (WXHDC)::CreateEnhMetaFile(hdcRef, GetMetaFileName(filename), | |
207 | pRect, description); | |
208 | if ( !m_hDC ) | |
209 | { | |
210 | wxLogLastError(_T("CreateEnhMetaFile")); | |
211 | } | |
212 | } | |
213 | ||
214 | wxEnhMetaFile *wxEnhMetaFileDC::Close() | |
215 | { | |
216 | wxCHECK_MSG( Ok(), NULL, _T("invalid wxEnhMetaFileDC") ); | |
217 | ||
218 | HENHMETAFILE hMF = ::CloseEnhMetaFile(GetHdc()); | |
219 | if ( !hMF ) | |
220 | { | |
221 | wxLogLastError(_T("CloseEnhMetaFile")); | |
222 | ||
223 | return NULL; | |
224 | } | |
225 | ||
226 | wxEnhMetaFile *mf = new wxEnhMetaFile; | |
227 | mf->SetHENHMETAFILE((WXHANDLE)hMF); | |
228 | return mf; | |
229 | } | |
230 | ||
231 | wxEnhMetaFileDC::~wxEnhMetaFileDC() | |
232 | { | |
233 | // avoid freeing it in the base class dtor | |
234 | m_hDC = 0; | |
235 | } | |
236 | ||
237 | #if wxUSE_DRAG_AND_DROP | |
238 | ||
239 | // ---------------------------------------------------------------------------- | |
240 | // wxEnhMetaFileDataObject | |
241 | // ---------------------------------------------------------------------------- | |
242 | ||
243 | wxDataFormat | |
244 | wxEnhMetaFileDataObject::GetPreferredFormat(Direction WXUNUSED(dir)) const | |
245 | { | |
246 | return wxDF_ENHMETAFILE; | |
247 | } | |
248 | ||
249 | size_t wxEnhMetaFileDataObject::GetFormatCount(Direction WXUNUSED(dir)) const | |
250 | { | |
251 | // wxDF_ENHMETAFILE and wxDF_METAFILE | |
252 | return 2; | |
253 | } | |
254 | ||
255 | void wxEnhMetaFileDataObject::GetAllFormats(wxDataFormat *formats, | |
256 | Direction WXUNUSED(dir)) const | |
257 | { | |
258 | formats[0] = wxDF_ENHMETAFILE; | |
259 | formats[1] = wxDF_METAFILE; | |
260 | } | |
261 | ||
262 | size_t wxEnhMetaFileDataObject::GetDataSize(const wxDataFormat& format) const | |
263 | { | |
264 | if ( format == wxDF_ENHMETAFILE ) | |
265 | { | |
266 | // we pass data by handle and not HGLOBAL | |
267 | return 0u; | |
268 | } | |
269 | else | |
270 | { | |
271 | wxASSERT_MSG( format == wxDF_METAFILE, _T("unsupported format") ); | |
272 | ||
273 | return sizeof(METAFILEPICT); | |
274 | } | |
275 | } | |
276 | ||
277 | bool wxEnhMetaFileDataObject::GetDataHere(const wxDataFormat& format, void *buf) const | |
278 | { | |
279 | wxCHECK_MSG( m_metafile.Ok(), FALSE, _T("copying invalid enh metafile") ); | |
280 | ||
281 | HENHMETAFILE hEMF = (HENHMETAFILE)m_metafile.GetHENHMETAFILE(); | |
282 | ||
283 | if ( format == wxDF_ENHMETAFILE ) | |
284 | { | |
285 | HENHMETAFILE hEMFCopy = ::CopyEnhMetaFile(hEMF, NULL); | |
286 | if ( !hEMFCopy ) | |
287 | { | |
288 | wxLogLastError(_T("CopyEnhMetaFile")); | |
289 | ||
290 | return FALSE; | |
291 | } | |
292 | ||
293 | *(HENHMETAFILE *)buf = hEMFCopy; | |
294 | } | |
295 | else | |
296 | { | |
297 | wxASSERT_MSG( format == wxDF_METAFILE, _T("unsupported format") ); | |
298 | ||
299 | // convert to WMF | |
300 | ||
301 | ScreenHDC hdc; | |
302 | ||
303 | // first get the buffer size and alloc memory | |
304 | size_t size = ::GetWinMetaFileBits(hEMF, 0, NULL, MM_ANISOTROPIC, hdc); | |
305 | wxCHECK_MSG( size, FALSE, _T("GetWinMetaFileBits() failed") ); | |
306 | ||
307 | BYTE *bits = (BYTE *)malloc(size); | |
308 | ||
309 | // then get the enh metafile bits | |
310 | if ( !::GetWinMetaFileBits(hEMF, size, bits, MM_ANISOTROPIC, hdc) ) | |
311 | { | |
312 | wxLogLastError(_T("GetWinMetaFileBits")); | |
313 | ||
314 | free(bits); | |
315 | ||
316 | return FALSE; | |
317 | } | |
318 | ||
319 | // and finally convert them to the WMF | |
320 | HMETAFILE hMF = ::SetMetaFileBitsEx(size, bits); | |
321 | free(bits); | |
322 | if ( !hMF ) | |
323 | { | |
324 | wxLogLastError(_T("SetMetaFileBitsEx")); | |
325 | ||
326 | return FALSE; | |
327 | } | |
328 | ||
329 | METAFILEPICT *mfpict = (METAFILEPICT *)buf; | |
330 | ||
331 | wxSize sizeMF = m_metafile.GetSize(); | |
332 | mfpict->hMF = hMF; | |
333 | mfpict->mm = MM_ANISOTROPIC; | |
334 | mfpict->xExt = sizeMF.x; | |
335 | mfpict->yExt = sizeMF.y; | |
336 | ||
337 | PixelToHIMETRIC(&mfpict->xExt, &mfpict->yExt); | |
338 | } | |
339 | ||
340 | return TRUE; | |
341 | } | |
342 | ||
343 | bool wxEnhMetaFileDataObject::SetData(const wxDataFormat& format, | |
344 | size_t WXUNUSED(len), | |
345 | const void *buf) | |
346 | { | |
347 | HENHMETAFILE hEMF; | |
348 | ||
349 | if ( format == wxDF_ENHMETAFILE ) | |
350 | { | |
351 | hEMF = *(HENHMETAFILE *)buf; | |
352 | ||
353 | wxCHECK_MSG( hEMF, FALSE, _T("pasting invalid enh metafile") ); | |
354 | } | |
355 | else | |
356 | { | |
357 | wxASSERT_MSG( format == wxDF_METAFILE, _T("unsupported format") ); | |
358 | ||
359 | // convert from WMF | |
360 | const METAFILEPICT *mfpict = (const METAFILEPICT *)buf; | |
361 | ||
362 | // first get the buffer size | |
363 | size_t size = ::GetMetaFileBitsEx(mfpict->hMF, 0, NULL); | |
364 | wxCHECK_MSG( size, FALSE, _T("GetMetaFileBitsEx() failed") ); | |
365 | ||
366 | // then get metafile bits | |
367 | BYTE *bits = (BYTE *)malloc(size); | |
368 | if ( !::GetMetaFileBitsEx(mfpict->hMF, size, bits) ) | |
369 | { | |
370 | wxLogLastError(_T("GetMetaFileBitsEx")); | |
371 | ||
372 | free(bits); | |
373 | ||
374 | return FALSE; | |
375 | } | |
376 | ||
377 | ScreenHDC hdcRef; | |
378 | ||
379 | // and finally create an enhanced metafile from them | |
380 | hEMF = ::SetWinMetaFileBits(size, bits, hdcRef, mfpict); | |
381 | free(bits); | |
382 | if ( !hEMF ) | |
383 | { | |
384 | wxLogLastError(_T("SetWinMetaFileBits")); | |
385 | ||
386 | return FALSE; | |
387 | } | |
388 | } | |
389 | ||
390 | m_metafile.SetHENHMETAFILE((WXHANDLE)hEMF); | |
391 | ||
392 | return TRUE; | |
393 | } | |
394 | ||
395 | // ---------------------------------------------------------------------------- | |
396 | // wxEnhMetaFileSimpleDataObject | |
397 | // ---------------------------------------------------------------------------- | |
398 | ||
399 | size_t wxEnhMetaFileSimpleDataObject::GetDataSize() const | |
400 | { | |
401 | // we pass data by handle and not HGLOBAL | |
402 | return 0u; | |
403 | } | |
404 | ||
405 | bool wxEnhMetaFileSimpleDataObject::GetDataHere(void *buf) const | |
406 | { | |
407 | wxCHECK_MSG( m_metafile.Ok(), FALSE, _T("copying invalid enh metafile") ); | |
408 | ||
409 | HENHMETAFILE hEMF = (HENHMETAFILE)m_metafile.GetHENHMETAFILE(); | |
410 | ||
411 | HENHMETAFILE hEMFCopy = ::CopyEnhMetaFile(hEMF, NULL); | |
412 | if ( !hEMFCopy ) | |
413 | { | |
414 | wxLogLastError(_T("CopyEnhMetaFile")); | |
415 | ||
416 | return FALSE; | |
417 | } | |
418 | ||
419 | *(HENHMETAFILE *)buf = hEMFCopy; | |
420 | return TRUE; | |
421 | } | |
422 | ||
423 | bool wxEnhMetaFileSimpleDataObject::SetData(size_t WXUNUSED(len), | |
424 | const void *buf) | |
425 | { | |
426 | HENHMETAFILE hEMF = *(HENHMETAFILE *)buf; | |
427 | ||
428 | wxCHECK_MSG( hEMF, FALSE, _T("pasting invalid enh metafile") ); | |
429 | m_metafile.SetHENHMETAFILE((WXHANDLE)hEMF); | |
430 | ||
431 | return TRUE; | |
432 | } | |
433 | ||
434 | #endif // wxUSE_DRAG_AND_DROP | |
435 | ||
436 | #endif // wxUSE_ENH_METAFILE |