src/motif/cursor.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/cursor.cpp
   3 // Purpose:     wxCursor class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/list.h"
  17 #endif
  18
  19 #include "wx/cursor.h"
  20
  21 #ifndef WX_PRECOMP
  22     #include "wx/app.h"
  23     #include "wx/utils.h"
  24     #include "wx/window.h"
  25     #include "wx/image.h"
  26 #endif
  27
  28 #ifdef __VMS__
  29 #pragma message disable nosimpint
  30 #endif
  31 #include <Xm/Xm.h>
  32 #include <X11/cursorfont.h>
  33 #ifdef __VMS__
  34 #pragma message enable nosimpint
  35 #endif
  36
  37 #include "wx/motif/private.h"
  38
  39 // Cursor for one display, so we can choose the correct one for
  40 // the current display.
  41 class wxXCursor
  42 {
  43 public:
  44     WXDisplay*  m_display;
  45     WXCursor    m_cursor;
  46 };
  47
  48 WX_DECLARE_LIST(wxXCursor, wxXCursorList);
  49 #include "wx/listimpl.cpp"
  50 WX_DEFINE_LIST(wxXCursorList)
  51
  52 class WXDLLEXPORT wxCursorRefData: public wxObjectRefData
  53 {
  54     friend class WXDLLEXPORT wxCursor;
  55 public:
  56     wxCursorRefData();
  57     virtual ~wxCursorRefData();
  58
  59     wxXCursorList m_cursors;  // wxXCursor objects, one per display
  60     wxStockCursor m_cursorId; // wxWidgets standard cursor id
  61 };
  62
  63 #define M_CURSORDATA ((wxCursorRefData *)m_refData)
  64 #define M_CURSORHANDLERDATA ((wxCursorRefData *)bitmap->m_refData)
  65
  66 IMPLEMENT_DYNAMIC_CLASS(wxCursor, wxObject)
  67
  68 wxCursorRefData::wxCursorRefData()
  69 {
  70     m_cursorId = wxCURSOR_NONE;
  71 }
  72
  73 wxCursorRefData::~wxCursorRefData()
  74 {
  75     wxXCursorList::compatibility_iterator node = m_cursors.GetFirst();
  76     while (node)
  77     {
  78         wxXCursor* c = node->GetData();
  79         XFreeCursor((Display*) c->m_display, (Cursor) c->m_cursor);
  80         delete c;
  81         node = node->GetNext();
  82     }
  83 }
  84
  85 wxCursor::wxCursor()
  86 {
  87 }
  88
  89 #if wxUSE_IMAGE
  90 wxCursor::wxCursor(const wxImage & image)
  91 {
  92     unsigned char * rgbBits = image.GetData();
  93     int w = image.GetWidth() ;
  94     int h = image.GetHeight();
  95     bool bHasMask = image.HasMask();
  96     int imagebitcount = (w*h)/8;
  97
  98     unsigned char * bits = new unsigned char [imagebitcount];
  99     unsigned char * maskBits = new unsigned char [imagebitcount];
 100
 101     int i, j, i8;
 102     unsigned char c, cMask;
 103     for (i=0; i<imagebitcount; i++)
 104     {
 105         bits[i] = 0xff;
 106         i8 = i * 8;
 107
 108         cMask = 0xfe; // 11111110
 109         for (j=0; j<8; j++)
 110         {
 111             // possible overflow if we do the summation first ?
 112             c = (unsigned char)(rgbBits[(i8+j)*3]/3 + rgbBits[(i8+j)*3+1]/3 + rgbBits[(i8+j)*3+2]/3);
 113             // if average value is > mid grey
 114             if (c>127)
 115                 bits[i] = bits[i] & cMask;
 116             cMask = (unsigned char)((cMask << 1) | 1);
 117         }
 118     }
 119
 120     if (bHasMask)
 121     {
 122         unsigned char
 123             r = image.GetMaskRed(),
 124             g = image.GetMaskGreen(),
 125             b = image.GetMaskBlue();
 126
 127         for (i=0; i<imagebitcount; i++)
 128         {
 129             maskBits[i] = 0x0;
 130             i8 = i * 8;
 131
 132             cMask = 0x1;
 133             for (j=0; j<8; j++)
 134             {
 135                 if (rgbBits[(i8+j)*3] != r || rgbBits[(i8+j)*3+1] != g || rgbBits[(i8+j)*3+2] != b)
 136                     maskBits[i] = maskBits[i] | cMask;
 137                 cMask = (unsigned char)(cMask << 1);
 138             }
 139         }
 140     }
 141     else // no mask
 142     {
 143         for (i=0; i<imagebitcount; i++)
 144             maskBits[i] = 0xFF;
 145     }
 146
 147     int hotSpotX;
 148     int hotSpotY;
 149
 150     if (image.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X))
 151         hotSpotX = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X);
 152     else
 153         hotSpotX = 0;
 154
 155     if (image.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y))
 156         hotSpotY = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y);
 157     else
 158         hotSpotY = 0;
 159
 160     if (hotSpotX < 0 || hotSpotX >= w)
 161         hotSpotX = 0;
 162     if (hotSpotY < 0 || hotSpotY >= h)
 163         hotSpotY = 0;
 164
 165     Create( (const char*)bits, w, h, hotSpotX, hotSpotY,
 166             (const char*)maskBits );
 167
 168     delete[] bits;
 169     delete[] maskBits;
 170 }
 171 #endif
 172
 173 void wxCursor::Create(const char bits[], int width, int height,
 174                       int hotSpotX, int hotSpotY, const char maskBits[])
 175 {
 176     if( !m_refData )
 177         m_refData = new wxCursorRefData;
 178
 179     Display *dpy = (Display*) wxGetDisplay();
 180     int screen_num =  DefaultScreen (dpy);
 181
 182     Pixmap pixmap = XCreatePixmapFromBitmapData (dpy,
 183                                           RootWindow (dpy, screen_num),
 184                                           (char*) bits, width, height,
 185                                           1 , 0 , 1);
 186
 187     Pixmap mask_pixmap = None;
 188     if (maskBits != NULL)
 189     {
 190         mask_pixmap = XCreatePixmapFromBitmapData (dpy,
 191                                           RootWindow (dpy, screen_num),
 192                                           (char*) maskBits, width, height,
 193                                           1 , 0 , 1);
 194     }
 195
 196     Create( (WXPixmap)pixmap, (WXPixmap)mask_pixmap, hotSpotX, hotSpotY );
 197
 198     XFreePixmap( dpy, pixmap );
 199     if (mask_pixmap != None)
 200     {
 201         XFreePixmap( dpy, mask_pixmap );
 202     }
 203 }
 204
 205 void wxCursor::Create(WXPixmap pixmap, WXPixmap mask_pixmap,
 206                       int hotSpotX, int hotSpotY)
 207 {
 208     if( !m_refData )
 209         m_refData = new wxCursorRefData;
 210
 211     Display *dpy = (Display*) wxGetDisplay();
 212     int screen_num =  DefaultScreen (dpy);
 213
 214     XColor foreground_color;
 215     XColor background_color;
 216     foreground_color.pixel = BlackPixel(dpy, screen_num);
 217     background_color.pixel = WhitePixel(dpy, screen_num);
 218     Colormap cmap = (Colormap) wxTheApp->GetMainColormap((WXDisplay*) dpy);
 219     XQueryColor(dpy, cmap, &foreground_color);
 220     XQueryColor(dpy, cmap, &background_color);
 221
 222     Cursor cursor = XCreatePixmapCursor (dpy,
 223                                   (Pixmap)pixmap,
 224                                   (Pixmap)mask_pixmap,
 225                                   &foreground_color,
 226                                   &background_color,
 227                                   hotSpotX ,
 228                                   hotSpotY);
 229
 230     if (cursor)
 231     {
 232         wxXCursor *c = new wxXCursor;
 233
 234         c->m_cursor = (WXCursor) cursor;
 235         c->m_display = (WXDisplay*) dpy;
 236         M_CURSORDATA->m_cursors.Append(c);
 237     }
 238 }
 239
 240 wxCursor::wxCursor(const char bits[], int width, int height,
 241                    int hotSpotX, int hotSpotY, const char maskBits[])
 242 {
 243     Create(bits, width, height, hotSpotX, hotSpotY, maskBits);
 244 }
 245
 246 wxCursor::wxCursor(const wxString& name, long flags, int hotSpotX, int hotSpotY)
 247 {
 248     // Must be an XBM file
 249     if (flags != wxBITMAP_TYPE_XBM)
 250         return;
 251
 252     m_refData = new wxCursorRefData;
 253
 254     int hotX = -1, hotY = -1;
 255     unsigned int w, h;
 256     Pixmap pixmap = None, mask_pixmap = None;
 257
 258     Display *dpy = (Display*) wxGetDisplay();
 259     int screen_num =  DefaultScreen (dpy);
 260
 261     int value = XReadBitmapFile (dpy, RootWindow (dpy, screen_num),
 262                                  wxConstCast(name.c_str(), char),
 263                                  &w, &h, &pixmap, &hotX, &hotY);
 264
 265     if (value == BitmapSuccess)
 266     {
 267         // TODO: how do we determine whether hotX, hotY were read correctly?
 268         if (hotX < 0 || hotY < 0)
 269         {
 270             hotX = hotSpotX;
 271             hotY = hotSpotY;
 272         }
 273         if (hotX < 0 || hotY < 0)
 274         {
 275             hotX = 0;
 276             hotY = 0;
 277         }
 278
 279         Create( (WXPixmap)pixmap, (WXPixmap)mask_pixmap, hotX, hotY );
 280
 281         XFreePixmap( dpy, pixmap );
 282     }
 283 }
 284
 285 // Cursors by stock number
 286 wxCursor::wxCursor(wxStockCursor id)
 287 {
 288     m_refData = new wxCursorRefData;
 289     M_CURSORDATA->m_cursorId = id;
 290 }
 291
 292 wxCursor::~wxCursor()
 293 {
 294 }
 295
 296 bool wxCursor::Ok() const
 297 {
 298     return m_refData != NULL;
 299 }
 300
 301 // Motif-specific: create/get a cursor for the current display
 302 WXCursor wxCursor::GetXCursor(WXDisplay* display) const
 303 {
 304     if (!M_CURSORDATA)
 305         return (WXCursor) 0;
 306     wxXCursorList::compatibility_iterator node = M_CURSORDATA->m_cursors.GetFirst();
 307     while (node)
 308     {
 309         wxXCursor* c = node->GetData();
 310         if (c->m_display == display)
 311             return c->m_cursor;
 312         node = node->GetNext();
 313     }
 314
 315     // No cursor for this display, so let's see if we're an id-type cursor.
 316
 317     if (M_CURSORDATA->m_cursorId != wxCURSOR_NONE)
 318     {
 319         WXCursor cursor = MakeCursor(display, M_CURSORDATA->m_cursorId);
 320         if (cursor)
 321         {
 322             wxXCursor* c = new wxXCursor;
 323             c->m_cursor = cursor;
 324             c->m_display = display;
 325             M_CURSORDATA->m_cursors.Append(c);
 326             return cursor;
 327         }
 328         else
 329             return (WXCursor) 0;
 330     }
 331
 332     // Not an id-type cursor, so we don't know how to create it.
 333     return (WXCursor) 0;
 334 }
 335
 336 // Make a cursor from standard id
 337 WXCursor wxCursor::MakeCursor(WXDisplay* display, wxStockCursor id) const
 338 {
 339     Display* dpy = (Display*) display;
 340     Cursor cursor = (Cursor) 0;
 341     int x_cur = -1;
 342
 343     switch (id)
 344     {
 345     case wxCURSOR_CHAR:             return (WXCursor)cursor;
 346
 347     case wxCURSOR_WAIT:             x_cur = XC_watch; break;
 348     case wxCURSOR_CROSS:            x_cur = XC_crosshair; break;
 349     case wxCURSOR_HAND:             x_cur = XC_hand1; break;
 350     case wxCURSOR_BULLSEYE:         x_cur = XC_target; break;
 351     case wxCURSOR_PENCIL:           x_cur = XC_pencil; break;
 352     case wxCURSOR_MAGNIFIER:        x_cur = XC_sizing; break;
 353     case wxCURSOR_IBEAM:            x_cur = XC_xterm; break;
 354     case wxCURSOR_NO_ENTRY:         x_cur = XC_pirate; break;
 355     case wxCURSOR_LEFT_BUTTON:      x_cur = XC_leftbutton; break;
 356     case wxCURSOR_RIGHT_BUTTON:     x_cur = XC_rightbutton; break;
 357     case wxCURSOR_MIDDLE_BUTTON:    x_cur =  XC_middlebutton; break;
 358     case wxCURSOR_QUESTION_ARROW:   x_cur = XC_question_arrow; break;
 359     case wxCURSOR_SIZING:           x_cur = XC_sizing; break;
 360     case wxCURSOR_WATCH:            x_cur = XC_watch; break;
 361     case wxCURSOR_SPRAYCAN:         x_cur = XC_spraycan; break;
 362     case wxCURSOR_PAINT_BRUSH:      x_cur = XC_spraycan; break;
 363     case wxCURSOR_SIZENWSE:
 364     case wxCURSOR_SIZENESW:         x_cur = XC_crosshair; break;
 365     case wxCURSOR_SIZEWE:           x_cur = XC_sb_h_double_arrow; break;
 366     case wxCURSOR_SIZENS:           x_cur = XC_sb_v_double_arrow; break;
 367     case wxCURSOR_POINT_LEFT:       x_cur = XC_sb_left_arrow; break;
 368     case wxCURSOR_POINT_RIGHT:      x_cur = XC_sb_right_arrow; break;
 369         // (JD Huggins) added more stock cursors for X
 370         // X-only cursors BEGIN
 371     case wxCURSOR_CROSS_REVERSE:    x_cur = XC_cross_reverse; break;
 372     case wxCURSOR_DOUBLE_ARROW:     x_cur = XC_double_arrow; break;
 373     case wxCURSOR_BASED_ARROW_UP:   x_cur = XC_based_arrow_up; break;
 374     case wxCURSOR_BASED_ARROW_DOWN: x_cur = XC_based_arrow_down; break;
 375     case wxCURSOR_BLANK:
 376     {
 377         GC gc;
 378         XGCValues gcv;
 379         Pixmap empty_pixmap;
 380         XColor blank_color;
 381
 382         empty_pixmap =
 383             XCreatePixmap (dpy, RootWindow (dpy, DefaultScreen (dpy)),
 384                            16, 16, 1);
 385         gcv.function = GXxor;
 386         gc = XCreateGC (dpy,
 387                         empty_pixmap,
 388                         GCFunction,
 389                         &gcv);
 390         XCopyArea (dpy,
 391                    empty_pixmap,
 392                    empty_pixmap,
 393                    gc,
 394                    0, 0,
 395                    16, 16,
 396                    0, 0);
 397         XFreeGC (dpy, gc);
 398         cursor = XCreatePixmapCursor (dpy,
 399                                       empty_pixmap,
 400                                       empty_pixmap,
 401                                       &blank_color,
 402                                       &blank_color,
 403                                       8, 8);
 404
 405         break;
 406     }
 407     case wxCURSOR_ARROW:
 408     default:       x_cur =  XC_top_left_arrow; break;
 409     }
 410
 411     if( x_cur == -1 )
 412         return (WXCursor)cursor;
 413
 414     cursor = XCreateFontCursor (dpy, x_cur);
 415     return (WXCursor) cursor;
 416 }
 417
 418 // Global cursor setting
 419 void wxSetCursor(const wxCursor& WXUNUSED(cursor))
 420 {
 421   // Nothing to do for Motif (no global cursor)
 422 }
 423
 424
 425 // ----------------------------------------------------------------------------
 426 // busy cursor stuff
 427 // ----------------------------------------------------------------------------
 428
 429 static int wxBusyCursorCount = 0;
 430
 431 // Helper function
 432 static void
 433 wxXSetBusyCursor (wxWindow * win, const wxCursor * cursor)
 434 {
 435     Display *display = (Display*) win->GetXDisplay();
 436
 437     Window xwin = (Window) win->GetXWindow();
 438     if (!xwin)
 439        return;
 440
 441     XSetWindowAttributes attrs;
 442
 443     if (cursor)
 444     {
 445         attrs.cursor = (Cursor) cursor->GetXCursor(display);
 446     }
 447     else
 448     {
 449         // Restore old cursor
 450         if (win->GetCursor().Ok())
 451             attrs.cursor = (Cursor) win->GetCursor().GetXCursor(display);
 452         else
 453             attrs.cursor = None;
 454     }
 455     if (xwin)
 456         XChangeWindowAttributes (display, xwin, CWCursor, &attrs);
 457
 458     XFlush (display);
 459
 460     for(wxWindowList::compatibility_iterator node = win->GetChildren().GetFirst (); node;
 461         node = node->GetNext())
 462     {
 463         wxWindow *child = node->GetData ();
 464         wxXSetBusyCursor (child, cursor);
 465     }
 466 }
 467
 468 // Set the cursor to the busy cursor for all windows
 469 void wxBeginBusyCursor(const wxCursor *cursor)
 470 {
 471     wxBusyCursorCount++;
 472     if (wxBusyCursorCount == 1)
 473     {
 474         for(wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst (); node;
 475             node = node->GetNext())
 476         {
 477             wxWindow *win = node->GetData ();
 478             wxXSetBusyCursor (win, cursor);
 479         }
 480     }
 481 }
 482
 483 // Restore cursor to normal
 484 void wxEndBusyCursor()
 485 {
 486     if (wxBusyCursorCount == 0)
 487         return;
 488
 489     wxBusyCursorCount--;
 490     if (wxBusyCursorCount == 0)
 491     {
 492         for(wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst (); node;
 493             node = node->GetNext())
 494         {
 495             wxWindow *win = node->GetData ();
 496             wxXSetBusyCursor (win, NULL);
 497         }
 498     }
 499 }
 500
 501 // true if we're between the above two calls
 502 bool wxIsBusy()
 503 {
 504     return (wxBusyCursorCount > 0);
 505 }