samples/image/image.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        samples/image/image.cpp
   3 // Purpose:     sample showing operations with wxImage
   4 // Author:      Robert Roebling
   5 // Modified by: Francesco Montorsi
   6 // Created:     1998
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998-2005 Robert Roebling
   9 //              (c) 2005-2009 Vadim Zeitlin
  10 // License:     wxWindows licence
  11 ///////////////////////////////////////////////////////////////////////////////
  12
  13 // For compilers that support precompilation, includes "wx/wx.h".
  14 #include "wx/wxprec.h"
  15
  16 #ifdef __BORLANDC__
  17 #pragma hdrstop
  18 #endif
  19
  20 #ifndef WX_PRECOMP
  21     #include "wx/wx.h"
  22 #endif
  23
  24 #include "wx/image.h"
  25 #include "wx/file.h"
  26 #include "wx/filename.h"
  27 #include "wx/mstream.h"
  28 #include "wx/wfstream.h"
  29 #include "wx/quantize.h"
  30 #include "wx/stopwatch.h"
  31
  32 #if wxUSE_CLIPBOARD
  33     #include "wx/dataobj.h"
  34     #include "wx/clipbrd.h"
  35 #endif // wxUSE_CLIPBOARD
  36
  37 #if defined(__WXMSW__)
  38     #ifdef wxHAVE_RAW_BITMAP
  39     #include "wx/rawbmp.h"
  40     #endif
  41 #endif
  42
  43 #if defined(__WXMAC__) || defined(__WXGTK__)
  44     #define wxHAVE_RAW_BITMAP
  45     #include "wx/rawbmp.h"
  46 #endif
  47
  48 #include "canvas.h"
  49
  50 #ifndef __WXMSW__
  51     #include "../sample.xpm"
  52 #endif
  53
  54 // ============================================================================
  55 // declarations
  56 // ============================================================================
  57
  58 //-----------------------------------------------------------------------------
  59 // MyApp
  60 //-----------------------------------------------------------------------------
  61
  62 class MyApp: public wxApp
  63 {
  64 public:
  65     virtual bool OnInit();
  66 };
  67
  68 // ----------------------------------------------------------------------------
  69 // MyFrame
  70 // ----------------------------------------------------------------------------
  71
  72 class MyFrame: public wxFrame
  73 {
  74 public:
  75     MyFrame();
  76
  77     void OnAbout( wxCommandEvent &event );
  78     void OnNewFrame( wxCommandEvent &event );
  79     void OnImageInfo( wxCommandEvent &event );
  80     void OnThumbnail( wxCommandEvent &event );
  81
  82 #ifdef wxHAVE_RAW_BITMAP
  83     void OnTestRawBitmap( wxCommandEvent &event );
  84 #endif // wxHAVE_RAW_BITMAP
  85     void OnQuit( wxCommandEvent &event );
  86
  87 #if wxUSE_CLIPBOARD
  88     void OnCopy(wxCommandEvent& event);
  89     void OnPaste(wxCommandEvent& event);
  90 #endif // wxUSE_CLIPBOARD
  91
  92     MyCanvas         *m_canvas;
  93
  94 private:
  95     // ask user for the file name and try to load an image from it
  96     //
  97     // return the file path on success, empty string if we failed to load the
  98     // image or were cancelled by user
  99     static wxString LoadUserImage(wxImage& image);
 100
 101
 102     DECLARE_DYNAMIC_CLASS(MyFrame)
 103     DECLARE_EVENT_TABLE()
 104 };
 105
 106 // ----------------------------------------------------------------------------
 107 // Frame used for showing a standalone image
 108 // ----------------------------------------------------------------------------
 109
 110 enum
 111 {
 112     ID_ROTATE_LEFT = wxID_HIGHEST+1,
 113     ID_ROTATE_RIGHT,
 114     ID_RESIZE,
 115     ID_PAINT_BG
 116 };
 117
 118 class MyImageFrame : public wxFrame
 119 {
 120 public:
 121     MyImageFrame(wxFrame *parent, const wxString& desc, const wxImage& image)
 122     {
 123         Create(parent, desc, wxBitmap(image), image.GetImageCount(desc));
 124     }
 125
 126     MyImageFrame(wxFrame *parent, const wxString& desc, const wxBitmap& bitmap)
 127     {
 128         Create(parent, desc, bitmap);
 129     }
 130
 131 private:
 132     bool Create(wxFrame *parent,
 133                 const wxString& desc,
 134                 const wxBitmap& bitmap,
 135                 int numImages = 1)
 136     {
 137         if ( !wxFrame::Create(parent, wxID_ANY,
 138                               wxString::Format(wxT("Image from %s"), desc),
 139                               wxDefaultPosition, wxDefaultSize,
 140                               wxDEFAULT_FRAME_STYLE | wxFULL_REPAINT_ON_RESIZE) )
 141             return false;
 142
 143         m_bitmap = bitmap;
 144         m_zoom = 1.;
 145
 146         wxMenu *menu = new wxMenu;
 147         menu->Append(wxID_SAVE);
 148         menu->AppendSeparator();
 149         menu->AppendCheckItem(ID_PAINT_BG, wxT("&Paint background"),
 150                               "Uncheck this for transparent images");
 151         menu->AppendSeparator();
 152         menu->Append(ID_RESIZE, wxT("&Fit to window\tCtrl-F"));
 153         menu->Append(wxID_ZOOM_IN, "Zoom &in\tCtrl-+");
 154         menu->Append(wxID_ZOOM_OUT, "Zoom &out\tCtrl--");
 155         menu->Append(wxID_ZOOM_100, "Reset zoom to &100%\tCtrl-1");
 156         menu->AppendSeparator();
 157         menu->Append(ID_ROTATE_LEFT, wxT("Rotate &left\tCtrl-L"));
 158         menu->Append(ID_ROTATE_RIGHT, wxT("Rotate &right\tCtrl-R"));
 159
 160         wxMenuBar *mbar = new wxMenuBar;
 161         mbar->Append(menu, wxT("&Image"));
 162         SetMenuBar(mbar);
 163
 164         mbar->Check(ID_PAINT_BG, true);
 165
 166         CreateStatusBar(2);
 167         if ( numImages != 1 )
 168             SetStatusText(wxString::Format("%d images", numImages), 1);
 169
 170         SetClientSize(bitmap.GetWidth(), bitmap.GetHeight());
 171
 172         UpdateStatusBar();
 173
 174         Show();
 175
 176         return true;
 177     }
 178
 179     void OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 180     {
 181         // do nothing here to be able to see how transparent images are shown
 182     }
 183
 184     void OnPaint(wxPaintEvent& WXUNUSED(event))
 185     {
 186         wxPaintDC dc(this);
 187
 188         if ( GetMenuBar()->IsChecked(ID_PAINT_BG) )
 189             ClearBackground();
 190
 191         dc.SetUserScale(m_zoom, m_zoom);
 192
 193         const wxSize size = GetClientSize();
 194         dc.DrawBitmap
 195            (
 196                 m_bitmap,
 197                 dc.DeviceToLogicalX((size.x - m_zoom*m_bitmap.GetWidth())/2),
 198                 dc.DeviceToLogicalY((size.y - m_zoom*m_bitmap.GetHeight())/2),
 199                 true /* use mask */
 200            );
 201     }
 202
 203     void OnSave(wxCommandEvent& WXUNUSED(event))
 204     {
 205 #if wxUSE_FILEDLG
 206         wxImage image = m_bitmap.ConvertToImage();
 207
 208         wxString savefilename = wxFileSelector( wxT("Save Image"),
 209                                                 wxEmptyString,
 210                                                 wxEmptyString,
 211                                                 (const wxChar *)NULL,
 212                                                 wxT("BMP files (*.bmp)|*.bmp|")
 213 #if wxUSE_LIBPNG
 214                                                 wxT("PNG files (*.png)|*.png|")
 215 #endif
 216 #if wxUSE_LIBJPEG
 217                                                 wxT("JPEG files (*.jpg)|*.jpg|")
 218 #endif
 219 #if wxUSE_GIF
 220                                                 wxT("GIF files (*.gif)|*.gif|")
 221 #endif
 222 #if wxUSE_LIBTIFF
 223                                                 wxT("TIFF files (*.tif)|*.tif|")
 224 #endif
 225 #if wxUSE_PCX
 226                                                 wxT("PCX files (*.pcx)|*.pcx|")
 227 #endif
 228                                                 wxT("ICO files (*.ico)|*.ico|")
 229                                                 wxT("CUR files (*.cur)|*.cur"),
 230                                                 wxFD_SAVE,
 231                                                 this);
 232
 233         if ( savefilename.empty() )
 234             return;
 235
 236         wxString extension;
 237         wxFileName::SplitPath(savefilename, NULL, NULL, &extension);
 238
 239         bool saved = false;
 240         if ( extension == wxT("bmp") )
 241         {
 242             static const int bppvalues[] =
 243             {
 244                 wxBMP_1BPP,
 245                 wxBMP_1BPP_BW,
 246                 wxBMP_4BPP,
 247                 wxBMP_8BPP,
 248                 wxBMP_8BPP_GREY,
 249                 wxBMP_8BPP_RED,
 250                 wxBMP_8BPP_PALETTE,
 251                 wxBMP_24BPP
 252             };
 253
 254             const wxString bppchoices[] =
 255             {
 256                 wxT("1 bpp color"),
 257                 wxT("1 bpp B&W"),
 258                 wxT("4 bpp color"),
 259                 wxT("8 bpp color"),
 260                 wxT("8 bpp greyscale"),
 261                 wxT("8 bpp red"),
 262                 wxT("8 bpp own palette"),
 263                 wxT("24 bpp")
 264             };
 265
 266             int bppselection = wxGetSingleChoiceIndex(wxT("Set BMP BPP"),
 267                                                     wxT("Image sample: save file"),
 268                                                     WXSIZEOF(bppchoices),
 269                                                     bppchoices,
 270                                                     this);
 271             if ( bppselection != -1 )
 272             {
 273                 int format = bppvalues[bppselection];
 274                 image.SetOption(wxIMAGE_OPTION_BMP_FORMAT, format);
 275
 276                 if ( format == wxBMP_8BPP_PALETTE )
 277                 {
 278                     unsigned char *cmap = new unsigned char [256];
 279                     for ( int i = 0; i < 256; i++ )
 280                         cmap[i] = (unsigned char)i;
 281                     image.SetPalette(wxPalette(256, cmap, cmap, cmap));
 282
 283                     delete[] cmap;
 284                 }
 285             }
 286         }
 287 #if wxUSE_LIBPNG
 288         else if ( extension == wxT("png") )
 289         {
 290             static const int pngvalues[] =
 291             {
 292                 wxPNG_TYPE_COLOUR,
 293                 wxPNG_TYPE_COLOUR,
 294                 wxPNG_TYPE_GREY,
 295                 wxPNG_TYPE_GREY,
 296                 wxPNG_TYPE_GREY_RED,
 297                 wxPNG_TYPE_GREY_RED,
 298             };
 299
 300             const wxString pngchoices[] =
 301             {
 302                 wxT("Colour 8bpp"),
 303                 wxT("Colour 16bpp"),
 304                 wxT("Grey 8bpp"),
 305                 wxT("Grey 16bpp"),
 306                 wxT("Grey red 8bpp"),
 307                 wxT("Grey red 16bpp"),
 308             };
 309
 310             int sel = wxGetSingleChoiceIndex(wxT("Set PNG format"),
 311                                             wxT("Image sample: save file"),
 312                                             WXSIZEOF(pngchoices),
 313                                             pngchoices,
 314                                             this);
 315             if ( sel != -1 )
 316             {
 317                 image.SetOption(wxIMAGE_OPTION_PNG_FORMAT, pngvalues[sel]);
 318                 image.SetOption(wxIMAGE_OPTION_PNG_BITDEPTH, sel % 2 ? 16 : 8);
 319
 320                 // these values are taken from OptiPNG with -o3 switch
 321                 const wxString compressionChoices[] =
 322                 {
 323                     wxT("compression = 9, memory = 8, strategy = 0, filter = 0"),
 324                     wxT("compression = 9, memory = 9, strategy = 0, filter = 0"),
 325                     wxT("compression = 9, memory = 8, strategy = 1, filter = 0"),
 326                     wxT("compression = 9, memory = 9, strategy = 1, filter = 0"),
 327                     wxT("compression = 1, memory = 8, strategy = 2, filter = 0"),
 328                     wxT("compression = 1, memory = 9, strategy = 2, filter = 0"),
 329                     wxT("compression = 9, memory = 8, strategy = 0, filter = 5"),
 330                     wxT("compression = 9, memory = 9, strategy = 0, filter = 5"),
 331                     wxT("compression = 9, memory = 8, strategy = 1, filter = 5"),
 332                     wxT("compression = 9, memory = 9, strategy = 1, filter = 5"),
 333                     wxT("compression = 1, memory = 8, strategy = 2, filter = 5"),
 334                     wxT("compression = 1, memory = 9, strategy = 2, filter = 5"),
 335                 };
 336
 337                 int sel = wxGetSingleChoiceIndex(wxT("Select compression option (Cancel to use default)\n"),
 338                                                  wxT("PNG Compression Options"),
 339                                                  WXSIZEOF(compressionChoices),
 340                                                  compressionChoices,
 341                                                  this);
 342                 if (sel != -1)
 343                 {
 344                     const int zc[] = {9, 9, 9, 9, 1, 1, 9, 9, 9, 9, 1, 1};
 345                     const int zm[] = {8, 9, 8, 9, 8, 9, 8, 9, 8, 9, 8, 9};
 346                     const int zs[] = {0, 0, 1, 1, 2, 2, 0, 0, 1, 1, 2, 2};
 347                     const int f[]  = {0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
 348                                       0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8};
 349
 350                     image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_LEVEL      , zc[sel]);
 351                     image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_MEM_LEVEL  , zm[sel]);
 352                     image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_STRATEGY   , zs[sel]);
 353                     image.SetOption(wxIMAGE_OPTION_PNG_FILTER                 , f[sel]);
 354                     image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_BUFFER_SIZE, 1048576); // 1 MB
 355                 }
 356             }
 357         }
 358 #endif // wxUSE_LIBPNG
 359         else if ( extension == wxT("cur") )
 360         {
 361             image.Rescale(32,32);
 362             image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 0);
 363             image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 0);
 364             // This shows how you can save an image with explicitly
 365             // specified image format:
 366             saved = image.SaveFile(savefilename, wxBITMAP_TYPE_CUR);
 367         }
 368
 369         if ( !saved )
 370         {
 371             // This one guesses image format from filename extension
 372             // (it may fail if the extension is not recognized):
 373             image.SaveFile(savefilename);
 374         }
 375 #endif // wxUSE_FILEDLG
 376     }
 377
 378     void OnResize(wxCommandEvent& WXUNUSED(event))
 379     {
 380         wxImage img(m_bitmap.ConvertToImage());
 381
 382         const wxSize size = GetClientSize();
 383         img.Rescale(size.x, size.y, wxIMAGE_QUALITY_HIGH);
 384         m_bitmap = wxBitmap(img);
 385
 386         UpdateStatusBar();
 387     }
 388
 389     void OnZoom(wxCommandEvent& event)
 390     {
 391         if ( event.GetId() == wxID_ZOOM_IN )
 392             m_zoom *= 1.2;
 393         else if ( event.GetId() == wxID_ZOOM_OUT )
 394             m_zoom /= 1.2;
 395         else // wxID_ZOOM_100
 396             m_zoom = 1.;
 397
 398         UpdateStatusBar();
 399     }
 400
 401     void OnRotate(wxCommandEvent& event)
 402     {
 403         double angle = 5;
 404         if ( event.GetId() == ID_ROTATE_LEFT )
 405             angle = -angle;
 406
 407         wxImage img(m_bitmap.ConvertToImage());
 408         img = img.Rotate(angle, wxPoint(img.GetWidth() / 2, img.GetHeight() / 2));
 409         if ( !img.Ok() )
 410         {
 411             wxLogWarning(wxT("Rotation failed"));
 412             return;
 413         }
 414
 415         m_bitmap = wxBitmap(img);
 416
 417         UpdateStatusBar();
 418     }
 419
 420     void UpdateStatusBar()
 421     {
 422         wxLogStatus(this, wxT("Image size: (%d, %d), zoom %.2f"),
 423                     m_bitmap.GetWidth(),
 424                     m_bitmap.GetHeight(),
 425                     m_zoom);
 426         Refresh();
 427     }
 428
 429     wxBitmap m_bitmap;
 430     double m_zoom;
 431
 432     DECLARE_EVENT_TABLE()
 433 };
 434
 435 #ifdef wxHAVE_RAW_BITMAP
 436
 437 #include "wx/rawbmp.h"
 438
 439 class MyRawBitmapFrame : public wxFrame
 440 {
 441 public:
 442     enum
 443     {
 444         BORDER = 15,
 445         SIZE = 150,
 446         REAL_SIZE = SIZE - 2*BORDER
 447     };
 448
 449     MyRawBitmapFrame(wxFrame *parent)
 450         : wxFrame(parent, wxID_ANY, wxT("Raw bitmaps (how exciting)")),
 451         m_bitmap(SIZE, SIZE, 24),
 452         m_alphaBitmap(SIZE, SIZE, 32)
 453     {
 454         SetClientSize(SIZE, SIZE*2+25);
 455
 456         InitAlphaBitmap();
 457         InitBitmap();
 458
 459     }
 460
 461     void InitAlphaBitmap()
 462     {
 463         // First, clear the whole bitmap by making it alpha
 464         {
 465             wxAlphaPixelData data( m_alphaBitmap, wxPoint(0,0), wxSize(SIZE, SIZE) );
 466             if ( !data )
 467             {
 468                 wxLogError(wxT("Failed to gain raw access to bitmap data"));
 469                 return;
 470             }
 471             wxAlphaPixelData::Iterator p(data);
 472             for ( int y = 0; y < SIZE; ++y )
 473             {
 474                 wxAlphaPixelData::Iterator rowStart = p;
 475                 for ( int x = 0; x < SIZE; ++x )
 476                 {
 477                     p.Alpha() = 0;
 478                     ++p; // same as p.OffsetX(1)
 479                 }
 480                 p = rowStart;
 481                 p.OffsetY(data, 1);
 482             }
 483         }
 484
 485         // Then, draw colourful alpha-blended stripes
 486         wxAlphaPixelData data(m_alphaBitmap, wxPoint(BORDER, BORDER),
 487                             wxSize(REAL_SIZE, REAL_SIZE));
 488         if ( !data )
 489         {
 490             wxLogError(wxT("Failed to gain raw access to bitmap data"));
 491             return;
 492         }
 493
 494         wxAlphaPixelData::Iterator p(data);
 495
 496         for ( int y = 0; y < REAL_SIZE; ++y )
 497         {
 498             wxAlphaPixelData::Iterator rowStart = p;
 499
 500             int r = y < REAL_SIZE/3 ? 255 : 0,
 501                 g = (REAL_SIZE/3 <= y) && (y < 2*(REAL_SIZE/3)) ? 255 : 0,
 502                 b = 2*(REAL_SIZE/3) <= y ? 255 : 0;
 503
 504             for ( int x = 0; x < REAL_SIZE; ++x )
 505             {
 506                 // note that RGB must be premultiplied by alpha
 507                 unsigned a = (wxAlphaPixelData::Iterator::ChannelType)((x*255.)/REAL_SIZE);
 508                 p.Red() = r * a / 256;
 509                 p.Green() = g * a / 256;
 510                 p.Blue() = b * a / 256;
 511                 p.Alpha() = a;
 512
 513                 ++p; // same as p.OffsetX(1)
 514             }
 515
 516             p = rowStart;
 517             p.OffsetY(data, 1);
 518         }
 519     }
 520
 521     void InitBitmap()
 522     {
 523         // draw some colourful stripes without alpha
 524         wxNativePixelData data(m_bitmap);
 525         if ( !data )
 526         {
 527             wxLogError(wxT("Failed to gain raw access to bitmap data"));
 528             return;
 529         }
 530
 531         wxNativePixelData::Iterator p(data);
 532         for ( int y = 0; y < SIZE; ++y )
 533         {
 534             wxNativePixelData::Iterator rowStart = p;
 535
 536             int r = y < SIZE/3 ? 255 : 0,
 537                 g = (SIZE/3 <= y) && (y < 2*(SIZE/3)) ? 255 : 0,
 538                 b = 2*(SIZE/3) <= y ? 255 : 0;
 539
 540             for ( int x = 0; x < SIZE; ++x )
 541             {
 542                 p.Red() = r;
 543                 p.Green() = g;
 544                 p.Blue() = b;
 545                 ++p; // same as p.OffsetX(1)
 546             }
 547
 548             p = rowStart;
 549             p.OffsetY(data, 1);
 550         }
 551     }
 552
 553     void OnPaint(wxPaintEvent& WXUNUSED(event))
 554     {
 555         wxPaintDC dc( this );
 556         dc.DrawText(wxT("This is alpha and raw bitmap test"), 0, BORDER);
 557         dc.DrawText(wxT("This is alpha and raw bitmap test"), 0, SIZE/2 - BORDER);
 558         dc.DrawText(wxT("This is alpha and raw bitmap test"), 0, SIZE - 2*BORDER);
 559         dc.DrawBitmap( m_alphaBitmap, 0, 0, true /* use mask */ );
 560
 561         dc.DrawText(wxT("Raw bitmap access without alpha"), 0, SIZE+5);
 562         dc.DrawBitmap( m_bitmap, 0, SIZE+5+dc.GetCharHeight());
 563     }
 564
 565 private:
 566     wxBitmap m_bitmap;
 567     wxBitmap m_alphaBitmap;
 568
 569     DECLARE_EVENT_TABLE()
 570 };
 571
 572 #endif // wxHAVE_RAW_BITMAP
 573
 574
 575 // ============================================================================
 576 // implementations
 577 // ============================================================================
 578
 579 //-----------------------------------------------------------------------------
 580 // MyImageFrame
 581 //-----------------------------------------------------------------------------
 582
 583 BEGIN_EVENT_TABLE(MyImageFrame, wxFrame)
 584     EVT_ERASE_BACKGROUND(MyImageFrame::OnEraseBackground)
 585     EVT_PAINT(MyImageFrame::OnPaint)
 586
 587     EVT_MENU(wxID_SAVE, MyImageFrame::OnSave)
 588     EVT_MENU_RANGE(ID_ROTATE_LEFT, ID_ROTATE_RIGHT, MyImageFrame::OnRotate)
 589     EVT_MENU(ID_RESIZE, MyImageFrame::OnResize)
 590
 591     EVT_MENU(wxID_ZOOM_IN, MyImageFrame::OnZoom)
 592     EVT_MENU(wxID_ZOOM_OUT, MyImageFrame::OnZoom)
 593     EVT_MENU(wxID_ZOOM_100, MyImageFrame::OnZoom)
 594 END_EVENT_TABLE()
 595
 596 //-----------------------------------------------------------------------------
 597 // MyRawBitmapFrame
 598 //-----------------------------------------------------------------------------
 599
 600 #ifdef wxHAVE_RAW_BITMAP
 601
 602 BEGIN_EVENT_TABLE(MyRawBitmapFrame, wxFrame)
 603     EVT_PAINT(MyRawBitmapFrame::OnPaint)
 604 END_EVENT_TABLE()
 605
 606 #endif // wxHAVE_RAW_BITMAP
 607
 608 //-----------------------------------------------------------------------------
 609 // MyFrame
 610 //-----------------------------------------------------------------------------
 611
 612 enum
 613 {
 614     ID_QUIT  = wxID_EXIT,
 615     ID_ABOUT = wxID_ABOUT,
 616     ID_NEW = 100,
 617     ID_INFO,
 618     ID_SHOWRAW,
 619     ID_SHOWTHUMBNAIL
 620 };
 621
 622 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 623 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 624     EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 625     EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 626     EVT_MENU    (ID_NEW,   MyFrame::OnNewFrame)
 627     EVT_MENU    (ID_INFO,  MyFrame::OnImageInfo)
 628     EVT_MENU    (ID_SHOWTHUMBNAIL, MyFrame::OnThumbnail)
 629 #ifdef wxHAVE_RAW_BITMAP
 630     EVT_MENU    (ID_SHOWRAW, MyFrame::OnTestRawBitmap)
 631 #endif
 632 #if wxUSE_CLIPBOARD
 633     EVT_MENU(wxID_COPY, MyFrame::OnCopy)
 634     EVT_MENU(wxID_PASTE, MyFrame::OnPaste)
 635 #endif // wxUSE_CLIPBOARD
 636 END_EVENT_TABLE()
 637
 638 MyFrame::MyFrame()
 639     : wxFrame( (wxFrame *)NULL, wxID_ANY, wxT("wxImage sample"),
 640                 wxPoint(20, 20), wxSize(950, 700) )
 641 {
 642     SetIcon(wxICON(sample));
 643
 644     wxMenuBar *menu_bar = new wxMenuBar();
 645
 646     wxMenu *menuImage = new wxMenu;
 647     menuImage->Append( ID_NEW, wxT("&Show any image...\tCtrl-O"));
 648     menuImage->Append( ID_INFO, wxT("Show image &information...\tCtrl-I"));
 649 #ifdef wxHAVE_RAW_BITMAP
 650     menuImage->AppendSeparator();
 651     menuImage->Append( ID_SHOWRAW, wxT("Test &raw bitmap...\tCtrl-R"));
 652 #endif
 653     menuImage->AppendSeparator();
 654     menuImage->Append( ID_SHOWTHUMBNAIL, wxT("Test &thumbnail...\tCtrl-T"),
 655                         "Test scaling the image during load (try with JPEG)");
 656     menuImage->AppendSeparator();
 657     menuImage->Append( ID_ABOUT, wxT("&About..."));
 658     menuImage->AppendSeparator();
 659     menuImage->Append( ID_QUIT, wxT("E&xit\tCtrl-Q"));
 660     menu_bar->Append(menuImage, wxT("&Image"));
 661
 662 #if wxUSE_CLIPBOARD
 663     wxMenu *menuClipboard = new wxMenu;
 664     menuClipboard->Append(wxID_COPY, wxT("&Copy test image\tCtrl-C"));
 665     menuClipboard->Append(wxID_PASTE, wxT("&Paste image\tCtrl-V"));
 666     menu_bar->Append(menuClipboard, wxT("&Clipboard"));
 667 #endif // wxUSE_CLIPBOARD
 668
 669     SetMenuBar( menu_bar );
 670
 671 #if wxUSE_STATUSBAR
 672     CreateStatusBar(2);
 673     int widths[] = { -1, 100 };
 674     SetStatusWidths( 2, widths );
 675 #endif // wxUSE_STATUSBAR
 676
 677     m_canvas = new MyCanvas( this, wxID_ANY, wxPoint(0,0), wxSize(10,10) );
 678
 679     // 500 width * 2750 height
 680     m_canvas->SetScrollbars( 10, 10, 50, 275 );
 681 }
 682
 683 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 684 {
 685     Close( true );
 686 }
 687
 688 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 689 {
 690     (void)wxMessageBox( "wxImage demo\n"
 691                         "(c) Robert Roebling 1998-2005"
 692                         "(c) Vadim Zeitlin 2005-2009",
 693                         "About wxImage Demo",
 694                         wxICON_INFORMATION | wxOK );
 695 }
 696
 697 wxString MyFrame::LoadUserImage(wxImage& image)
 698 {
 699     wxString filename;
 700
 701 #if wxUSE_FILEDLG
 702     filename = wxLoadFileSelector(wxT("image"), wxEmptyString);
 703     if ( !filename.empty() )
 704     {
 705         if ( !image.LoadFile(filename) )
 706         {
 707             wxLogError(wxT("Couldn't load image from '%s'."), filename.c_str());
 708
 709             return wxEmptyString;
 710         }
 711     }
 712 #endif // wxUSE_FILEDLG
 713
 714     return filename;
 715 }
 716
 717 void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) )
 718 {
 719     wxImage image;
 720     wxString filename = LoadUserImage(image);
 721     if ( !filename.empty() )
 722         new MyImageFrame(this, filename, image);
 723 }
 724
 725 void MyFrame::OnImageInfo( wxCommandEvent &WXUNUSED(event) )
 726 {
 727     wxImage image;
 728     if ( !LoadUserImage(image).empty() )
 729     {
 730         // TODO: show more information about the file
 731         wxString info = wxString::Format("Image size: %dx%d",
 732                                         image.GetWidth(),
 733                                         image.GetHeight());
 734
 735         int xres = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX),
 736             yres = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY);
 737         if ( xres || yres )
 738         {
 739             info += wxString::Format("\nResolution: %dx%d", xres, yres);
 740             switch ( image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT) )
 741             {
 742                 default:
 743                     wxFAIL_MSG( "unknown image resolution units" );
 744                     // fall through
 745
 746                 case wxIMAGE_RESOLUTION_NONE:
 747                     info += " in default units";
 748                     break;
 749
 750                 case wxIMAGE_RESOLUTION_INCHES:
 751                     info += " in";
 752                     break;
 753
 754                 case wxIMAGE_RESOLUTION_CM:
 755                     info += " cm";
 756                     break;
 757             }
 758         }
 759
 760         wxLogMessage("%s", info);
 761     }
 762 }
 763
 764 #ifdef wxHAVE_RAW_BITMAP
 765
 766 void MyFrame::OnTestRawBitmap( wxCommandEvent &WXUNUSED(event) )
 767 {
 768     (new MyRawBitmapFrame(this))->Show();
 769 }
 770
 771 #endif // wxHAVE_RAW_BITMAP
 772
 773 #if wxUSE_CLIPBOARD
 774
 775 void MyFrame::OnCopy(wxCommandEvent& WXUNUSED(event))
 776 {
 777     wxBitmapDataObject *dobjBmp = new wxBitmapDataObject;
 778     dobjBmp->SetBitmap(m_canvas->my_horse_png);
 779
 780     wxTheClipboard->Open();
 781
 782     if ( !wxTheClipboard->SetData(dobjBmp) )
 783     {
 784         wxLogError(wxT("Failed to copy bitmap to clipboard"));
 785     }
 786
 787     wxTheClipboard->Close();
 788 }
 789
 790 void MyFrame::OnPaste(wxCommandEvent& WXUNUSED(event))
 791 {
 792     wxBitmapDataObject dobjBmp;
 793
 794     wxTheClipboard->Open();
 795     if ( !wxTheClipboard->GetData(dobjBmp) )
 796     {
 797         wxLogMessage(wxT("No bitmap data in the clipboard"));
 798     }
 799     else
 800     {
 801         new MyImageFrame(this, wxT("Clipboard"), dobjBmp.GetBitmap());
 802     }
 803     wxTheClipboard->Close();
 804 }
 805
 806 #endif // wxUSE_CLIPBOARD
 807
 808 void MyFrame::OnThumbnail( wxCommandEvent &WXUNUSED(event) )
 809 {
 810 #if wxUSE_FILEDLG
 811     wxString filename = wxLoadFileSelector(wxT("image"), wxEmptyString, wxEmptyString, this);
 812     if ( filename.empty() )
 813         return;
 814
 815     static const int THUMBNAIL_WIDTH = 320;
 816     static const int THUMBNAIL_HEIGHT = 240;
 817
 818     wxImage image;
 819     image.SetOption(wxIMAGE_OPTION_MAX_WIDTH, THUMBNAIL_WIDTH);
 820     image.SetOption(wxIMAGE_OPTION_MAX_HEIGHT, THUMBNAIL_HEIGHT);
 821
 822     wxStopWatch sw;
 823     if ( !image.LoadFile(filename) )
 824     {
 825         wxLogError(wxT("Couldn't load image from '%s'."), filename.c_str());
 826         return;
 827     }
 828
 829     const long loadTime = sw.Time();
 830
 831     MyImageFrame * const frame = new MyImageFrame(this, filename, image);
 832     wxLogStatus(frame, "Loaded \"%s\" in %ldms", filename, loadTime);
 833 #else
 834     wxLogError( wxT("Couldn't create file selector dialog") );
 835     return;
 836 #endif // wxUSE_FILEDLG
 837 }
 838
 839 //-----------------------------------------------------------------------------
 840 // MyApp
 841 //-----------------------------------------------------------------------------
 842
 843 IMPLEMENT_APP(MyApp)
 844
 845 bool MyApp::OnInit()
 846 {
 847     if ( !wxApp::OnInit() )
 848         return false;
 849
 850     wxInitAllImageHandlers();
 851
 852     wxFrame *frame = new MyFrame();
 853     frame->Show( true );
 854
 855     return true;
 856 }