src/gtk/cursor.cpp

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