src/gtk1/cursor.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/cursor.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/cursor.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/app.h"
  17     #include "wx/utils.h"
  18 #endif // WX_PRECOMP
  19
  20 #include <gdk/gdk.h>
  21 #include <gtk/gtk.h>
  22
  23 //-----------------------------------------------------------------------------
  24 // idle system
  25 //-----------------------------------------------------------------------------
  26
  27 extern void wxapp_install_idle_handler();
  28 extern bool g_isIdle;
  29
  30 //-----------------------------------------------------------------------------
  31 // wxCursor
  32 //-----------------------------------------------------------------------------
  33
  34 class wxCursorRefData : public wxGDIRefData
  35 {
  36 public:
  37     wxCursorRefData();
  38     virtual ~wxCursorRefData();
  39
  40     GdkCursor *m_cursor;
  41
  42 private:
  43     // There is no way to copy m_cursor so we can't implement a copy ctor
  44     // properly.
  45     wxDECLARE_NO_COPY_CLASS(wxCursorRefData);
  46 };
  47
  48 wxCursorRefData::wxCursorRefData()
  49 {
  50     m_cursor = NULL;
  51 }
  52
  53 wxCursorRefData::~wxCursorRefData()
  54 {
  55     if (m_cursor) gdk_cursor_destroy( m_cursor );
  56 }
  57
  58 //-----------------------------------------------------------------------------
  59
  60 #define M_CURSORDATA ((wxCursorRefData *)m_refData)
  61
  62 IMPLEMENT_DYNAMIC_CLASS(wxCursor,wxObject)
  63
  64 wxCursor::wxCursor()
  65 {
  66
  67 }
  68
  69 void wxCursor::InitFromStock( wxStockCursor cursorId )
  70 {
  71     m_refData = new wxCursorRefData();
  72
  73     GdkCursorType gdk_cur = GDK_LEFT_PTR;
  74     switch (cursorId)
  75     {
  76         case wxCURSOR_BLANK:
  77             {
  78                 static const gchar bits[] = { 0 };
  79                 static /* const -- not in GTK1 */ GdkColor color = { 0, 0, 0, 0 };
  80
  81                 GdkPixmap *pixmap = gdk_bitmap_create_from_data(NULL, bits, 1, 1);
  82                 M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixmap(pixmap,
  83                                                                     pixmap,
  84                                                                     &color,
  85                                                                     &color,
  86                                                                     0, 0);
  87             }
  88             return;
  89
  90         case wxCURSOR_ARROW:            // fall through to default
  91         case wxCURSOR_DEFAULT:          gdk_cur = GDK_LEFT_PTR; break;
  92         case wxCURSOR_RIGHT_ARROW:      gdk_cur = GDK_RIGHT_PTR; break;
  93         case wxCURSOR_HAND:             gdk_cur = GDK_HAND1; break;
  94         case wxCURSOR_CROSS:            gdk_cur = GDK_CROSSHAIR; break;
  95         case wxCURSOR_SIZEWE:           gdk_cur = GDK_SB_H_DOUBLE_ARROW; break;
  96         case wxCURSOR_SIZENS:           gdk_cur = GDK_SB_V_DOUBLE_ARROW; break;
  97         case wxCURSOR_ARROWWAIT:
  98         case wxCURSOR_WAIT:
  99         case wxCURSOR_WATCH:            gdk_cur = GDK_WATCH; break;
 100         case wxCURSOR_SIZING:           gdk_cur = GDK_SIZING; break;
 101         case wxCURSOR_SPRAYCAN:         gdk_cur = GDK_SPRAYCAN; break;
 102         case wxCURSOR_IBEAM:            gdk_cur = GDK_XTERM; break;
 103         case wxCURSOR_PENCIL:           gdk_cur = GDK_PENCIL; break;
 104         case wxCURSOR_NO_ENTRY:         gdk_cur = GDK_PIRATE; break;
 105         case wxCURSOR_SIZENWSE:
 106         case wxCURSOR_SIZENESW:         gdk_cur = GDK_FLEUR; break;
 107         case wxCURSOR_QUESTION_ARROW:   gdk_cur = GDK_QUESTION_ARROW; break;
 108         case wxCURSOR_PAINT_BRUSH:      gdk_cur = GDK_SPRAYCAN; break;
 109         case wxCURSOR_MAGNIFIER:        gdk_cur = GDK_PLUS; break;
 110         case wxCURSOR_CHAR:             gdk_cur = GDK_XTERM; break;
 111         case wxCURSOR_LEFT_BUTTON:      gdk_cur = GDK_LEFTBUTTON; break;
 112         case wxCURSOR_MIDDLE_BUTTON:    gdk_cur = GDK_MIDDLEBUTTON; break;
 113         case wxCURSOR_RIGHT_BUTTON:     gdk_cur = GDK_RIGHTBUTTON; break;
 114         case wxCURSOR_BULLSEYE:         gdk_cur = GDK_TARGET; break;
 115
 116         case wxCURSOR_POINT_LEFT:       gdk_cur = GDK_SB_LEFT_ARROW; break;
 117         case wxCURSOR_POINT_RIGHT:      gdk_cur = GDK_SB_RIGHT_ARROW; break;
 118 /*
 119         case wxCURSOR_DOUBLE_ARROW:     gdk_cur = GDK_DOUBLE_ARROW; break;
 120         case wxCURSOR_CROSS_REVERSE:    gdk_cur = GDK_CROSS_REVERSE; break;
 121         case wxCURSOR_BASED_ARROW_UP:   gdk_cur = GDK_BASED_ARROW_UP; break;
 122         case wxCURSOR_BASED_ARROW_DOWN: gdk_cur = GDK_BASED_ARROW_DOWN; break;
 123 */
 124
 125         default:
 126             wxFAIL_MSG(wxT("unsupported cursor type"));
 127             // will use the standard one
 128             break;
 129     }
 130
 131     M_CURSORDATA->m_cursor = gdk_cursor_new( gdk_cur );
 132 }
 133
 134 extern GtkWidget *wxGetRootWindow();
 135
 136 wxCursor::wxCursor(const char bits[], int width, int  height,
 137                    int hotSpotX, int hotSpotY,
 138                    const char maskBits[], const wxColour *fg, const wxColour *bg)
 139 {
 140     if (!maskBits)
 141         maskBits = bits;
 142     if (!fg)
 143         fg = wxBLACK;
 144     if (!bg)
 145         bg = wxWHITE;
 146     if (hotSpotX < 0 || hotSpotX >= width)
 147         hotSpotX = 0;
 148     if (hotSpotY < 0 || hotSpotY >= height)
 149         hotSpotY = 0;
 150
 151     GdkBitmap *data = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) bits, width, height );
 152     GdkBitmap *mask = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) maskBits, width, height);
 153
 154     m_refData = new wxCursorRefData;
 155     M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixmap(
 156                  data, mask, fg->GetColor(), bg->GetColor(),
 157                  hotSpotX, hotSpotY );
 158
 159     gdk_bitmap_unref( data );
 160     gdk_bitmap_unref( mask );
 161 }
 162
 163 #if wxUSE_IMAGE
 164
 165 wxCursor::wxCursor( const wxImage & image )
 166 {
 167     unsigned char * rgbBits = image.GetData();
 168     int w = image.GetWidth() ;
 169     int h = image.GetHeight();
 170     bool bHasMask = image.HasMask();
 171     int imagebitcount = (w*h)/8;
 172
 173     unsigned char * bits = new unsigned char [imagebitcount];
 174     unsigned char * maskBits = new unsigned char [imagebitcount];
 175
 176     int i, j, i8; unsigned char c, cMask;
 177     for (i=0; i<imagebitcount; i++)
 178     {
 179         bits[i] = 0;
 180         i8 = i * 8;
 181
 182         cMask = 1;
 183         for (j=0; j<8; j++)
 184         {
 185             // possible overflow if we do the summation first ?
 186             c = rgbBits[(i8+j)*3]/3 + rgbBits[(i8+j)*3+1]/3 + rgbBits[(i8+j)*3+2]/3;
 187             //if average value is > mid grey
 188             if (c>127)
 189                 bits[i] = bits[i] | cMask;
 190             cMask = cMask * 2;
 191         }
 192     }
 193
 194     unsigned long keyMaskColor;
 195     if (bHasMask)
 196     {
 197         unsigned char
 198             r = image.GetMaskRed(),
 199             g = image.GetMaskGreen(),
 200             b = image.GetMaskBlue();
 201
 202         for (i=0; i<imagebitcount; i++)
 203         {
 204             maskBits[i] = 0x0;
 205             i8 = i * 8;
 206
 207             cMask = 1;
 208             for (j=0; j<8; j++)
 209             {
 210                 if (rgbBits[(i8+j)*3] != r || rgbBits[(i8+j)*3+1] != g || rgbBits[(i8+j)*3+2] != b)
 211                     maskBits[i] = maskBits[i] | cMask;
 212                 cMask = cMask * 2;
 213             }
 214         }
 215
 216         keyMaskColor = (r << 16) | (g << 8) | b;
 217     }
 218     else // no mask
 219     {
 220         for (i=0; i<imagebitcount; i++)
 221             maskBits[i] = 0xFF;
 222
 223         // init it to avoid compiler warnings
 224         keyMaskColor = 0;
 225     }
 226
 227     // find the most frequent color(s)
 228     wxImageHistogram histogram;
 229     image.ComputeHistogram(histogram);
 230
 231     // colors as rrggbb
 232     unsigned long key;
 233     unsigned long value;
 234
 235     long colMostFreq = 0;
 236     unsigned long nMost = 0;
 237     long colNextMostFreq = 0;
 238     unsigned long nNext = 0;
 239     for ( wxImageHistogram::iterator entry = histogram.begin();
 240           entry != histogram.end();
 241           ++entry )
 242     {
 243         value = entry->second.value;
 244         key = entry->first;
 245         if ( !bHasMask || (key != keyMaskColor) )
 246         {
 247             if (value > nMost)
 248             {
 249                 nMost = value;
 250                 colMostFreq = key;
 251             }
 252             else if (value > nNext)
 253             {
 254                 nNext = value;
 255                 colNextMostFreq = key;
 256             }
 257         }
 258     }
 259
 260     wxColour fg = wxColour ( (unsigned char)(colMostFreq >> 16),
 261                              (unsigned char)(colMostFreq >> 8),
 262                              (unsigned char)(colMostFreq) );
 263
 264     wxColour bg = wxColour ( (unsigned char)(colNextMostFreq >> 16),
 265                              (unsigned char)(colNextMostFreq >> 8),
 266                              (unsigned char)(colNextMostFreq) );
 267
 268     int fg_intensity = fg.Red() + fg.Green() + fg.Blue();
 269     int bg_intensity = bg.Red() + bg.Green() + bg.Blue();
 270
 271     if (bg_intensity > fg_intensity)
 272     {
 273         //swap fg and bg
 274         wxColour tmp = fg;
 275         fg = bg;
 276         bg = tmp;
 277     }
 278
 279     int hotSpotX;
 280     int hotSpotY;
 281
 282     if (image.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X))
 283         hotSpotX = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X);
 284     else
 285         hotSpotX = 0;
 286
 287     if (image.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y))
 288         hotSpotY = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y);
 289     else
 290         hotSpotY = 0;
 291
 292     if (hotSpotX < 0 || hotSpotX >= w)
 293         hotSpotX = 0;
 294     if (hotSpotY < 0 || hotSpotY >= h)
 295         hotSpotY = 0;
 296
 297     GdkBitmap *data = gdk_bitmap_create_from_data(wxGetRootWindow()->window,
 298                                                   (gchar *) bits, w, h);
 299     GdkBitmap *mask = gdk_bitmap_create_from_data(wxGetRootWindow()->window,
 300                                                   (gchar *) maskBits, w, h);
 301
 302     m_refData = new wxCursorRefData;
 303     M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixmap
 304                              (
 305                                 data,
 306                                 mask,
 307                                 fg.GetColor(), bg.GetColor(),
 308                                 hotSpotX, hotSpotY
 309                              );
 310
 311     gdk_bitmap_unref( data );
 312     gdk_bitmap_unref( mask );
 313     delete [] bits;
 314     delete [] maskBits;
 315 }
 316
 317 #endif // wxUSE_IMAGE
 318
 319 wxCursor::~wxCursor()
 320 {
 321 }
 322
 323 GdkCursor *wxCursor::GetCursor() const
 324 {
 325     return M_CURSORDATA->m_cursor;
 326 }
 327
 328 wxGDIRefData *wxCursor::CreateGDIRefData() const
 329 {
 330     return new wxCursorRefData;
 331 }
 332
 333 wxGDIRefData *
 334 wxCursor::CloneGDIRefData(const wxGDIRefData * WXUNUSED(data)) const
 335 {
 336     wxFAIL_MSG( wxS("Cloning cursors is not implemented in wxGTK.") );
 337
 338     return new wxCursorRefData;
 339 }
 340
 341 //-----------------------------------------------------------------------------
 342 // busy cursor routines
 343 //-----------------------------------------------------------------------------
 344
 345 extern wxCursor g_globalCursor;
 346
 347 static wxCursor  gs_savedCursor;
 348 static int       gs_busyCount = 0;
 349
 350 const wxCursor &wxBusyCursor::GetStoredCursor()
 351 {
 352     return gs_savedCursor;
 353 }
 354
 355 const wxCursor wxBusyCursor::GetBusyCursor()
 356 {
 357     return wxCursor(wxCURSOR_WATCH);
 358 }
 359
 360 void wxEndBusyCursor()
 361 {
 362     if (--gs_busyCount > 0)
 363         return;
 364
 365     wxSetCursor( gs_savedCursor );
 366     gs_savedCursor = wxNullCursor;
 367
 368     if (wxTheApp)
 369         wxTheApp->ProcessIdle();
 370 }
 371
 372 void wxBeginBusyCursor( const wxCursor *WXUNUSED(cursor) )
 373 {
 374     if (gs_busyCount++ > 0)
 375         return;
 376
 377     wxASSERT_MSG( !gs_savedCursor.Ok(),
 378                   wxT("forgot to call wxEndBusyCursor, will leak memory") );
 379
 380     gs_savedCursor = g_globalCursor;
 381
 382     wxSetCursor( wxCursor(wxCURSOR_WATCH) );
 383
 384     if (wxTheApp)
 385         wxTheApp->ProcessIdle();
 386
 387     gdk_flush();
 388 }
 389
 390 bool wxIsBusy()
 391 {
 392     return gs_busyCount > 0;
 393 }
 394
 395 void wxSetCursor( const wxCursor& cursor )
 396 {
 397     if (g_isIdle)
 398         wxapp_install_idle_handler();
 399
 400     g_globalCursor = cursor;
 401 }