| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/msw/metafile.cpp |
| 3 | // Purpose: wxMetafileDC etc. |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: VZ 07.01.00: implemented wxMetaFileDataObject |
| 6 | // Created: 04/01/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Julian Smart |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | // For compilers that support precompilation, includes "wx.h". |
| 21 | #include "wx/wxprec.h" |
| 22 | |
| 23 | #ifdef __BORLANDC__ |
| 24 | #pragma hdrstop |
| 25 | #endif |
| 26 | |
| 27 | #ifndef WX_PRECOMP |
| 28 | #include "wx/utils.h" |
| 29 | #include "wx/app.h" |
| 30 | #endif |
| 31 | |
| 32 | #include "wx/metafile.h" |
| 33 | #include "wx/filename.h" |
| 34 | |
| 35 | #if wxUSE_METAFILE && !defined(wxMETAFILE_IS_ENH) |
| 36 | |
| 37 | #include "wx/clipbrd.h" |
| 38 | #include "wx/msw/private.h" |
| 39 | |
| 40 | #include <stdio.h> |
| 41 | #include <string.h> |
| 42 | |
| 43 | // ---------------------------------------------------------------------------- |
| 44 | // wxWin macros |
| 45 | // ---------------------------------------------------------------------------- |
| 46 | |
| 47 | IMPLEMENT_DYNAMIC_CLASS(wxMetafile, wxObject) |
| 48 | IMPLEMENT_ABSTRACT_CLASS(wxMetafileDC, wxDC) |
| 49 | |
| 50 | // ============================================================================ |
| 51 | // implementation |
| 52 | // ============================================================================ |
| 53 | |
| 54 | // ---------------------------------------------------------------------------- |
| 55 | // wxMetafileRefData |
| 56 | // ---------------------------------------------------------------------------- |
| 57 | |
| 58 | /* |
| 59 | * Metafiles |
| 60 | * Currently, the only purpose for making a metafile is to put |
| 61 | * it on the clipboard. |
| 62 | */ |
| 63 | |
| 64 | wxMetafileRefData::wxMetafileRefData() |
| 65 | { |
| 66 | m_metafile = 0; |
| 67 | m_windowsMappingMode = MM_ANISOTROPIC; |
| 68 | m_width = m_height = 0; |
| 69 | } |
| 70 | |
| 71 | wxMetafileRefData::~wxMetafileRefData() |
| 72 | { |
| 73 | if (m_metafile) |
| 74 | { |
| 75 | DeleteMetaFile((HMETAFILE) m_metafile); |
| 76 | m_metafile = 0; |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | // ---------------------------------------------------------------------------- |
| 81 | // wxMetafile |
| 82 | // ---------------------------------------------------------------------------- |
| 83 | |
| 84 | wxMetafile::wxMetafile(const wxString& file) |
| 85 | { |
| 86 | m_refData = new wxMetafileRefData; |
| 87 | |
| 88 | M_METAFILEDATA->m_windowsMappingMode = MM_ANISOTROPIC; |
| 89 | M_METAFILEDATA->m_metafile = 0; |
| 90 | if (!file.empty()) |
| 91 | M_METAFILEDATA->m_metafile = (WXHANDLE) GetMetaFile(file); |
| 92 | } |
| 93 | |
| 94 | wxMetafile::~wxMetafile() |
| 95 | { |
| 96 | } |
| 97 | |
| 98 | wxGDIRefData *wxMetafile::CreateGDIRefData() const |
| 99 | { |
| 100 | return new wxMetafileRefData; |
| 101 | } |
| 102 | |
| 103 | wxGDIRefData *wxMetafile::CloneGDIRefData(const wxGDIRefData *data) const |
| 104 | { |
| 105 | return new wxMetafileRefData(*static_cast<const wxMetafileRefData *>(data)); |
| 106 | } |
| 107 | |
| 108 | bool wxMetafile::SetClipboard(int width, int height) |
| 109 | { |
| 110 | #if !wxUSE_CLIPBOARD |
| 111 | return false; |
| 112 | #else |
| 113 | if (!m_refData) |
| 114 | return false; |
| 115 | |
| 116 | bool alreadyOpen = wxClipboardOpen(); |
| 117 | if (!alreadyOpen) |
| 118 | { |
| 119 | wxOpenClipboard(); |
| 120 | if (!wxEmptyClipboard()) |
| 121 | return false; |
| 122 | } |
| 123 | bool success = wxSetClipboardData(wxDF_METAFILE, this, width,height); |
| 124 | if (!alreadyOpen) |
| 125 | wxCloseClipboard(); |
| 126 | |
| 127 | return success; |
| 128 | #endif |
| 129 | } |
| 130 | |
| 131 | bool wxMetafile::Play(wxDC *dc) |
| 132 | { |
| 133 | if (!m_refData) |
| 134 | return false; |
| 135 | |
| 136 | if (dc->GetHDC() && M_METAFILEDATA->m_metafile) |
| 137 | { |
| 138 | if ( !::PlayMetaFile(GetHdcOf(*dc), (HMETAFILE) |
| 139 | M_METAFILEDATA->m_metafile) ) |
| 140 | { |
| 141 | wxLogLastError(wxT("PlayMetaFile")); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | return true; |
| 146 | } |
| 147 | |
| 148 | void wxMetafile::SetHMETAFILE(WXHANDLE mf) |
| 149 | { |
| 150 | if (!m_refData) |
| 151 | m_refData = new wxMetafileRefData; |
| 152 | |
| 153 | M_METAFILEDATA->m_metafile = mf; |
| 154 | } |
| 155 | |
| 156 | void wxMetafile::SetWindowsMappingMode(int mm) |
| 157 | { |
| 158 | if (!m_refData) |
| 159 | m_refData = new wxMetafileRefData; |
| 160 | |
| 161 | M_METAFILEDATA->m_windowsMappingMode = mm; |
| 162 | } |
| 163 | |
| 164 | // ---------------------------------------------------------------------------- |
| 165 | // Metafile device context |
| 166 | // ---------------------------------------------------------------------------- |
| 167 | |
| 168 | // Original constructor that does not takes origin and extent. If you use this, |
| 169 | // *DO* give origin/extent arguments to wxMakeMetafilePlaceable. |
| 170 | wxMetafileDCImpl::wxMetafileDCImpl(wxDC *owner, const wxString& file) |
| 171 | : wxMSWDCImpl(owner) |
| 172 | { |
| 173 | m_metaFile = NULL; |
| 174 | m_minX = 10000; |
| 175 | m_minY = 10000; |
| 176 | m_maxX = -10000; |
| 177 | m_maxY = -10000; |
| 178 | // m_title = NULL; |
| 179 | |
| 180 | if ( wxFileExists(file) ) |
| 181 | wxRemoveFile(file); |
| 182 | |
| 183 | if ( file.empty() ) |
| 184 | m_hDC = (WXHDC) CreateMetaFile(NULL); |
| 185 | else |
| 186 | m_hDC = (WXHDC) CreateMetaFile(file); |
| 187 | |
| 188 | m_ok = (m_hDC != (WXHDC) 0) ; |
| 189 | |
| 190 | // Actual Windows mapping mode, for future reference. |
| 191 | m_windowsMappingMode = wxMM_TEXT; |
| 192 | |
| 193 | SetMapMode(wxMM_TEXT); // NOTE: does not set HDC mapmode (this is correct) |
| 194 | } |
| 195 | |
| 196 | // New constructor that takes origin and extent. If you use this, don't |
| 197 | // give origin/extent arguments to wxMakeMetafilePlaceable. |
| 198 | wxMetafileDCImpl::wxMetafileDCImpl(wxDC *owner, const wxString& file, |
| 199 | int xext, int yext, int xorg, int yorg) |
| 200 | : wxMSWDCImpl(owner) |
| 201 | { |
| 202 | m_minX = 10000; |
| 203 | m_minY = 10000; |
| 204 | m_maxX = -10000; |
| 205 | m_maxY = -10000; |
| 206 | if ( !file.empty() && wxFileExists(file) ) |
| 207 | wxRemoveFile(file); |
| 208 | m_hDC = (WXHDC) CreateMetaFile(file.empty() ? NULL : wxMSW_CONV_LPCTSTR(file)); |
| 209 | |
| 210 | m_ok = true; |
| 211 | |
| 212 | ::SetWindowOrgEx((HDC) m_hDC,xorg,yorg, NULL); |
| 213 | ::SetWindowExtEx((HDC) m_hDC,xext,yext, NULL); |
| 214 | |
| 215 | // Actual Windows mapping mode, for future reference. |
| 216 | m_windowsMappingMode = MM_ANISOTROPIC; |
| 217 | |
| 218 | SetMapMode(wxMM_TEXT); // NOTE: does not set HDC mapmode (this is correct) |
| 219 | } |
| 220 | |
| 221 | wxMetafileDCImpl::~wxMetafileDCImpl() |
| 222 | { |
| 223 | m_hDC = 0; |
| 224 | } |
| 225 | |
| 226 | void wxMetafileDCImpl::DoGetTextExtent(const wxString& string, |
| 227 | wxCoord *x, wxCoord *y, |
| 228 | wxCoord *descent, wxCoord *externalLeading, |
| 229 | const wxFont *theFont) const |
| 230 | { |
| 231 | const wxFont *fontToUse = theFont; |
| 232 | if (!fontToUse) |
| 233 | fontToUse = &m_font; |
| 234 | |
| 235 | ScreenHDC dc; |
| 236 | SelectInHDC selFont(dc, GetHfontOf(*fontToUse)); |
| 237 | |
| 238 | SIZE sizeRect; |
| 239 | TEXTMETRIC tm; |
| 240 | ::GetTextExtentPoint32(dc, WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect); |
| 241 | ::GetTextMetrics(dc, &tm); |
| 242 | |
| 243 | if ( x ) |
| 244 | *x = sizeRect.cx; |
| 245 | if ( y ) |
| 246 | *y = sizeRect.cy; |
| 247 | if ( descent ) |
| 248 | *descent = tm.tmDescent; |
| 249 | if ( externalLeading ) |
| 250 | *externalLeading = tm.tmExternalLeading; |
| 251 | } |
| 252 | |
| 253 | void wxMetafileDCImpl::DoGetSize(int *width, int *height) const |
| 254 | { |
| 255 | wxCHECK_RET( m_refData, wxT("invalid wxMetafileDC") ); |
| 256 | |
| 257 | if ( width ) |
| 258 | *width = M_METAFILEDATA->m_width; |
| 259 | if ( height ) |
| 260 | *height = M_METAFILEDATA->m_height; |
| 261 | } |
| 262 | |
| 263 | wxMetafile *wxMetafileDCImpl::Close() |
| 264 | { |
| 265 | SelectOldObjects(m_hDC); |
| 266 | HANDLE mf = CloseMetaFile((HDC) m_hDC); |
| 267 | m_hDC = 0; |
| 268 | if (mf) |
| 269 | { |
| 270 | wxMetafile *wx_mf = new wxMetafile; |
| 271 | wx_mf->SetHMETAFILE((WXHANDLE) mf); |
| 272 | wx_mf->SetWindowsMappingMode(m_windowsMappingMode); |
| 273 | return wx_mf; |
| 274 | } |
| 275 | return NULL; |
| 276 | } |
| 277 | |
| 278 | void wxMetafileDCImpl::SetMapMode(wxMappingMode mode) |
| 279 | { |
| 280 | m_mappingMode = mode; |
| 281 | |
| 282 | // int pixel_width = 0; |
| 283 | // int pixel_height = 0; |
| 284 | // int mm_width = 0; |
| 285 | // int mm_height = 0; |
| 286 | |
| 287 | float mm2pixelsX = 10.0; |
| 288 | float mm2pixelsY = 10.0; |
| 289 | |
| 290 | switch (mode) |
| 291 | { |
| 292 | case wxMM_TWIPS: |
| 293 | { |
| 294 | m_logicalScaleX = (float)(twips2mm * mm2pixelsX); |
| 295 | m_logicalScaleY = (float)(twips2mm * mm2pixelsY); |
| 296 | break; |
| 297 | } |
| 298 | case wxMM_POINTS: |
| 299 | { |
| 300 | m_logicalScaleX = (float)(pt2mm * mm2pixelsX); |
| 301 | m_logicalScaleY = (float)(pt2mm * mm2pixelsY); |
| 302 | break; |
| 303 | } |
| 304 | case wxMM_METRIC: |
| 305 | { |
| 306 | m_logicalScaleX = mm2pixelsX; |
| 307 | m_logicalScaleY = mm2pixelsY; |
| 308 | break; |
| 309 | } |
| 310 | case wxMM_LOMETRIC: |
| 311 | { |
| 312 | m_logicalScaleX = (float)(mm2pixelsX/10.0); |
| 313 | m_logicalScaleY = (float)(mm2pixelsY/10.0); |
| 314 | break; |
| 315 | } |
| 316 | default: |
| 317 | case wxMM_TEXT: |
| 318 | { |
| 319 | m_logicalScaleX = 1.0; |
| 320 | m_logicalScaleY = 1.0; |
| 321 | break; |
| 322 | } |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | // ---------------------------------------------------------------------------- |
| 327 | // wxMakeMetafilePlaceable |
| 328 | // ---------------------------------------------------------------------------- |
| 329 | |
| 330 | #ifdef __WIN32__ |
| 331 | struct RECT32 |
| 332 | { |
| 333 | short left; |
| 334 | short top; |
| 335 | short right; |
| 336 | short bottom; |
| 337 | }; |
| 338 | |
| 339 | struct mfPLACEABLEHEADER { |
| 340 | DWORD key; |
| 341 | short hmf; |
| 342 | RECT32 bbox; |
| 343 | WORD inch; |
| 344 | DWORD reserved; |
| 345 | WORD checksum; |
| 346 | }; |
| 347 | #else |
| 348 | struct mfPLACEABLEHEADER { |
| 349 | DWORD key; |
| 350 | HANDLE hmf; |
| 351 | RECT bbox; |
| 352 | WORD inch; |
| 353 | DWORD reserved; |
| 354 | WORD checksum; |
| 355 | }; |
| 356 | #endif |
| 357 | |
| 358 | /* |
| 359 | * Pass filename of existing non-placeable metafile, and bounding box. |
| 360 | * Adds a placeable metafile header, sets the mapping mode to anisotropic, |
| 361 | * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode. |
| 362 | * |
| 363 | */ |
| 364 | |
| 365 | bool wxMakeMetafilePlaceable(const wxString& filename, float scale) |
| 366 | { |
| 367 | return wxMakeMetafilePlaceable(filename, 0, 0, 0, 0, scale, false); |
| 368 | } |
| 369 | |
| 370 | bool wxMakeMetafilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale, bool useOriginAndExtent) |
| 371 | { |
| 372 | // I'm not sure if this is the correct way of suggesting a scale |
| 373 | // to the client application, but it's the only way I can find. |
| 374 | int unitsPerInch = (int)(576/scale); |
| 375 | |
| 376 | mfPLACEABLEHEADER header; |
| 377 | header.key = 0x9AC6CDD7L; |
| 378 | header.hmf = 0; |
| 379 | header.bbox.left = (int)(x1); |
| 380 | header.bbox.top = (int)(y1); |
| 381 | header.bbox.right = (int)(x2); |
| 382 | header.bbox.bottom = (int)(y2); |
| 383 | header.inch = unitsPerInch; |
| 384 | header.reserved = 0; |
| 385 | |
| 386 | // Calculate checksum |
| 387 | WORD *p; |
| 388 | mfPLACEABLEHEADER *pMFHead = &header; |
| 389 | for (p =(WORD *)pMFHead,pMFHead -> checksum = 0; |
| 390 | p < (WORD *)&pMFHead ->checksum; ++p) |
| 391 | pMFHead ->checksum ^= *p; |
| 392 | |
| 393 | FILE *fd = wxFopen(filename.fn_str(), wxT("rb")); |
| 394 | if (!fd) return false; |
| 395 | |
| 396 | wxString tempFileBuf = wxFileName::CreateTempFileName(wxT("mf")); |
| 397 | if (tempFileBuf.empty()) |
| 398 | return false; |
| 399 | |
| 400 | FILE *fHandle = wxFopen(tempFileBuf.fn_str(), wxT("wb")); |
| 401 | if (!fHandle) |
| 402 | return false; |
| 403 | fwrite((void *)&header, sizeof(unsigned char), sizeof(mfPLACEABLEHEADER), fHandle); |
| 404 | |
| 405 | // Calculate origin and extent |
| 406 | int originX = x1; |
| 407 | int originY = y1; |
| 408 | int extentX = x2 - x1; |
| 409 | int extentY = (y2 - y1); |
| 410 | |
| 411 | // Read metafile header and write |
| 412 | METAHEADER metaHeader; |
| 413 | fread((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fd); |
| 414 | |
| 415 | if (useOriginAndExtent) |
| 416 | metaHeader.mtSize += 15; |
| 417 | else |
| 418 | metaHeader.mtSize += 5; |
| 419 | |
| 420 | fwrite((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fHandle); |
| 421 | |
| 422 | // Write SetMapMode, SetWindowOrigin and SetWindowExt records |
| 423 | char modeBuffer[8]; |
| 424 | char originBuffer[10]; |
| 425 | char extentBuffer[10]; |
| 426 | METARECORD *modeRecord = (METARECORD *)&modeBuffer; |
| 427 | |
| 428 | METARECORD *originRecord = (METARECORD *)&originBuffer; |
| 429 | METARECORD *extentRecord = (METARECORD *)&extentBuffer; |
| 430 | |
| 431 | modeRecord->rdSize = 4; |
| 432 | modeRecord->rdFunction = META_SETMAPMODE; |
| 433 | modeRecord->rdParm[0] = MM_ANISOTROPIC; |
| 434 | |
| 435 | originRecord->rdSize = 5; |
| 436 | originRecord->rdFunction = META_SETWINDOWORG; |
| 437 | originRecord->rdParm[0] = originY; |
| 438 | originRecord->rdParm[1] = originX; |
| 439 | |
| 440 | extentRecord->rdSize = 5; |
| 441 | extentRecord->rdFunction = META_SETWINDOWEXT; |
| 442 | extentRecord->rdParm[0] = extentY; |
| 443 | extentRecord->rdParm[1] = extentX; |
| 444 | |
| 445 | fwrite((void *)modeBuffer, sizeof(char), 8, fHandle); |
| 446 | |
| 447 | if (useOriginAndExtent) |
| 448 | { |
| 449 | fwrite((void *)originBuffer, sizeof(char), 10, fHandle); |
| 450 | fwrite((void *)extentBuffer, sizeof(char), 10, fHandle); |
| 451 | } |
| 452 | |
| 453 | int ch = -2; |
| 454 | while (ch != EOF) |
| 455 | { |
| 456 | ch = getc(fd); |
| 457 | if (ch != EOF) |
| 458 | { |
| 459 | putc(ch, fHandle); |
| 460 | } |
| 461 | } |
| 462 | fclose(fHandle); |
| 463 | fclose(fd); |
| 464 | wxRemoveFile(filename); |
| 465 | wxCopyFile(tempFileBuf, filename); |
| 466 | wxRemoveFile(tempFileBuf); |
| 467 | return true; |
| 468 | } |
| 469 | |
| 470 | |
| 471 | #if wxUSE_DRAG_AND_DROP |
| 472 | |
| 473 | // ---------------------------------------------------------------------------- |
| 474 | // wxMetafileDataObject |
| 475 | // ---------------------------------------------------------------------------- |
| 476 | |
| 477 | size_t wxMetafileDataObject::GetDataSize() const |
| 478 | { |
| 479 | return sizeof(METAFILEPICT); |
| 480 | } |
| 481 | |
| 482 | bool wxMetafileDataObject::GetDataHere(void *buf) const |
| 483 | { |
| 484 | METAFILEPICT *mfpict = (METAFILEPICT *)buf; |
| 485 | const wxMetafile& mf = GetMetafile(); |
| 486 | |
| 487 | wxCHECK_MSG( mf.GetHMETAFILE(), false, wxT("copying invalid metafile") ); |
| 488 | |
| 489 | // doesn't seem to work with any other mapping mode... |
| 490 | mfpict->mm = MM_ANISOTROPIC; //mf.GetWindowsMappingMode(); |
| 491 | mfpict->xExt = mf.GetWidth(); |
| 492 | mfpict->yExt = mf.GetHeight(); |
| 493 | |
| 494 | // transform the picture size to HIMETRIC units (0.01mm) - as we don't know |
| 495 | // what DC the picture will be rendered to, use the default display one |
| 496 | PixelToHIMETRIC(&mfpict->xExt, &mfpict->yExt); |
| 497 | |
| 498 | mfpict->hMF = CopyMetaFile((HMETAFILE)mf.GetHMETAFILE(), NULL); |
| 499 | |
| 500 | return true; |
| 501 | } |
| 502 | |
| 503 | bool wxMetafileDataObject::SetData(size_t WXUNUSED(len), const void *buf) |
| 504 | { |
| 505 | const METAFILEPICT *mfpict = (const METAFILEPICT *)buf; |
| 506 | |
| 507 | wxMetafile mf; |
| 508 | mf.SetWindowsMappingMode(mfpict->mm); |
| 509 | |
| 510 | LONG w = mfpict->xExt, |
| 511 | h = mfpict->yExt; |
| 512 | if ( mfpict->mm == MM_ANISOTROPIC ) |
| 513 | { |
| 514 | // in this case xExt and yExt contain suggested size in HIMETRIC units |
| 515 | // (0.01 mm) - transform this to something more reasonable (pixels) |
| 516 | HIMETRICToPixel(&w, &h); |
| 517 | } |
| 518 | |
| 519 | mf.SetWidth(w); |
| 520 | mf.SetHeight(h); |
| 521 | mf.SetHMETAFILE((WXHANDLE)mfpict->hMF); |
| 522 | |
| 523 | wxCHECK_MSG( mfpict->hMF, false, wxT("pasting invalid metafile") ); |
| 524 | |
| 525 | SetMetafile(mf); |
| 526 | |
| 527 | return true; |
| 528 | } |
| 529 | |
| 530 | #endif // wxUSE_DRAG_AND_DROP |
| 531 | |
| 532 | #endif // wxUSE_METAFILE |