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