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     #include "wx/log.h"
  27 #endif
  28
  29 #ifdef __VMS__
  30 #pragma message disable nosimpint
  31 #endif
  32 #include <Xm/Xm.h>
  33 #include <X11/cursorfont.h>
  34 #ifdef __VMS__
  35 #pragma message enable nosimpint
  36 #endif
  37
  38 #include "wx/motif/private.h"
  39
  40 // Cursor for one display, so we can choose the correct one for
  41 // the current display.
  42 class wxXCursor
  43 {
  44 public:
  45     WXDisplay*  m_display;
  46     WXCursor    m_cursor;
  47 };
  48
  49 WX_DECLARE_LIST(wxXCursor, wxXCursorList);
  50 #include "wx/listimpl.cpp"
  51 WX_DEFINE_LIST(wxXCursorList)
  52
  53 class WXDLLEXPORT wxCursorRefData: public wxGDIRefData
  54 {
  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     friend class wxCursor;
  63 };
  64
  65 #define M_CURSORDATA ((wxCursorRefData *)m_refData)
  66 #define M_CURSORHANDLERDATA ((wxCursorRefData *)bitmap->m_refData)
  67
  68 IMPLEMENT_DYNAMIC_CLASS(wxCursor, wxObject)
  69
  70 wxCursorRefData::wxCursorRefData()
  71 {
  72     m_cursorId = wxCURSOR_NONE;
  73 }
  74
  75 wxCursorRefData::~wxCursorRefData()
  76 {
  77     wxXCursorList::compatibility_iterator node = m_cursors.GetFirst();
  78     while (node)
  79     {
  80         wxXCursor* c = node->GetData();
  81         XFreeCursor((Display*) c->m_display, (Cursor) c->m_cursor);
  82         delete c;
  83         node = node->GetNext();
  84     }
  85 }
  86
  87 wxCursor::wxCursor()
  88 {
  89 }
  90
  91 #if wxUSE_IMAGE
  92 wxCursor::wxCursor(const wxImage & image)
  93 {
  94     unsigned char * rgbBits = image.GetData();
  95     int w = image.GetWidth() ;
  96     int h = image.GetHeight();
  97     bool bHasMask = image.HasMask();
  98     int imagebitcount = (w*h)/8;
  99
 100     unsigned char * bits = new unsigned char [imagebitcount];
 101     unsigned char * maskBits = new unsigned char [imagebitcount];
 102
 103     int i, j, i8;
 104     unsigned char c, cMask;
 105     for (i=0; i<imagebitcount; i++)
 106     {
 107         bits[i] = 0xff;
 108         i8 = i * 8;
 109
 110         cMask = 0xfe; // 11111110
 111         for (j=0; j<8; j++)
 112         {
 113             // possible overflow if we do the summation first ?
 114             c = (unsigned char)(rgbBits[(i8+j)*3]/3 + rgbBits[(i8+j)*3+1]/3 + rgbBits[(i8+j)*3+2]/3);
 115             // if average value is > mid grey
 116             if (c>127)
 117                 bits[i] = bits[i] & cMask;
 118             cMask = (unsigned char)((cMask << 1) | 1);
 119         }
 120     }
 121
 122     if (bHasMask)
 123     {
 124         unsigned char
 125             r = image.GetMaskRed(),
 126             g = image.GetMaskGreen(),
 127             b = image.GetMaskBlue();
 128
 129         for (i=0; i<imagebitcount; i++)
 130         {
 131             maskBits[i] = 0x0;
 132             i8 = i * 8;
 133
 134             cMask = 0x1;
 135             for (j=0; j<8; j++)
 136             {
 137                 if (rgbBits[(i8+j)*3] != r || rgbBits[(i8+j)*3+1] != g || rgbBits[(i8+j)*3+2] != b)
 138                     maskBits[i] = maskBits[i] | cMask;
 139                 cMask = (unsigned char)(cMask << 1);
 140             }
 141         }
 142     }
 143     else // no mask
 144     {
 145         for (i=0; i<imagebitcount; i++)
 146             maskBits[i] = 0xFF;
 147     }
 148
 149     int hotSpotX;
 150     int hotSpotY;
 151
 152     if (image.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X))
 153         hotSpotX = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X);
 154     else
 155         hotSpotX = 0;
 156
 157     if (image.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y))
 158         hotSpotY = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y);
 159     else
 160         hotSpotY = 0;
 161
 162     if (hotSpotX < 0 || hotSpotX >= w)
 163         hotSpotX = 0;
 164     if (hotSpotY < 0 || hotSpotY >= h)
 165         hotSpotY = 0;
 166
 167     Create( (const char*)bits, w, h, hotSpotX, hotSpotY,
 168             (const char*)maskBits );
 169
 170     delete[] bits;
 171     delete[] maskBits;
 172 }
 173 #endif
 174
 175 void wxCursor::Create(const char bits[], int width, int height,
 176                       int hotSpotX, int hotSpotY, const char maskBits[])
 177 {
 178     if( !m_refData )
 179         m_refData = new wxCursorRefData;
 180
 181     Display *dpy = (Display*) wxGetDisplay();
 182     int screen_num =  DefaultScreen (dpy);
 183
 184     Pixmap pixmap = XCreatePixmapFromBitmapData (dpy,
 185                                           RootWindow (dpy, screen_num),
 186                                           (char*) bits, width, height,
 187                                           1 , 0 , 1);
 188
 189     Pixmap mask_pixmap = None;
 190     if (maskBits != NULL)
 191     {
 192         mask_pixmap = XCreatePixmapFromBitmapData (dpy,
 193                                           RootWindow (dpy, screen_num),
 194                                           (char*) maskBits, width, height,
 195                                           1 , 0 , 1);
 196     }
 197
 198     Create( (WXPixmap)pixmap, (WXPixmap)mask_pixmap, hotSpotX, hotSpotY );
 199
 200     XFreePixmap( dpy, pixmap );
 201     if (mask_pixmap != None)
 202     {
 203         XFreePixmap( dpy, mask_pixmap );
 204     }
 205 }
 206
 207 void wxCursor::Create(WXPixmap pixmap, WXPixmap mask_pixmap,
 208                       int hotSpotX, int hotSpotY)
 209 {
 210     if( !m_refData )
 211         m_refData = new wxCursorRefData;
 212
 213     Display *dpy = (Display*) wxGetDisplay();
 214     int screen_num =  DefaultScreen (dpy);
 215
 216     XColor foreground_color;
 217     XColor background_color;
 218     foreground_color.pixel = BlackPixel(dpy, screen_num);
 219     background_color.pixel = WhitePixel(dpy, screen_num);
 220     Colormap cmap = (Colormap) wxTheApp->GetMainColormap((WXDisplay*) dpy);
 221     XQueryColor(dpy, cmap, &foreground_color);
 222     XQueryColor(dpy, cmap, &background_color);
 223
 224     Cursor cursor = XCreatePixmapCursor (dpy,
 225                                   (Pixmap)pixmap,
 226                                   (Pixmap)mask_pixmap,
 227                                   &foreground_color,
 228                                   &background_color,
 229                                   hotSpotX ,
 230                                   hotSpotY);
 231
 232     if (cursor)
 233     {
 234         wxXCursor *c = new wxXCursor;
 235
 236         c->m_cursor = (WXCursor) cursor;
 237         c->m_display = (WXDisplay*) dpy;
 238         M_CURSORDATA->m_cursors.Append(c);
 239     }
 240 }
 241
 242 wxCursor::wxCursor(const char bits[], int width, int height,
 243                    int hotSpotX, int hotSpotY, const char maskBits[] ,
 244                    const wxColour* WXUNUSED(fg), const wxColour* WXUNUSED(bg) )
 245 {
 246     Create(bits, width, height, hotSpotX, hotSpotY, maskBits);
 247 }
 248
 249 wxCursor::wxCursor(const wxString& name, wxBitmapType type, int hotSpotX,
 250                    int hotSpotY )
 251 {
 252     // Must be an XBM file
 253     if (type != wxBITMAP_TYPE_XBM) {
 254         wxLogError("Invalid cursor bitmap type '%d'", type);
 255         return;
 256     }
 257
 258     m_refData = new wxCursorRefData;
 259
 260     int hotX = -1, hotY = -1;
 261     unsigned int w, h;
 262     Pixmap pixmap = None, mask_pixmap = None;
 263
 264     Display *dpy = (Display*) wxGetDisplay();
 265     int screen_num =  DefaultScreen (dpy);
 266
 267     int value = XReadBitmapFile (dpy, RootWindow (dpy, screen_num),
 268                                  name.mb_str(),
 269                                  &w, &h, &pixmap, &hotX, &hotY);
 270
 271     if (value == BitmapSuccess)
 272     {
 273         // TODO: how do we determine whether hotX, hotY were read correctly?
 274         if (hotX < 0 || hotY < 0)
 275         {
 276             hotX = hotSpotX;
 277             hotY = hotSpotY;
 278         }
 279         if (hotX < 0 || hotY < 0)
 280         {
 281             hotX = 0;
 282             hotY = 0;
 283         }
 284
 285         Create( (WXPixmap)pixmap, (WXPixmap)mask_pixmap, hotX, hotY );
 286
 287         XFreePixmap( dpy, pixmap );
 288     }
 289 }
 290
 291 // Cursors by stock number
 292 void wxCursor::InitFromStock(wxStockCursor id)
 293 {
 294     m_refData = new wxCursorRefData;
 295     M_CURSORDATA->m_cursorId = id;
 296 }
 297
 298 wxCursor::~wxCursor()
 299 {
 300 }
 301
 302 wxGDIRefData *wxCursor::CreateGDIRefData() const
 303 {
 304     return new wxCursorRefData;
 305 }
 306
 307 wxGDIRefData *wxCursor::CloneGDIRefData(const wxGDIRefData *data) const
 308 {
 309     return new wxCursorRefData(*static_cast<const wxCursorRefData *>(data));
 310 }
 311
 312 // Motif-specific: create/get a cursor for the current display
 313 WXCursor wxCursor::GetXCursor(WXDisplay* display) const
 314 {
 315     if (!M_CURSORDATA)
 316         return (WXCursor) 0;
 317     wxXCursorList::compatibility_iterator node = M_CURSORDATA->m_cursors.GetFirst();
 318     while (node)
 319     {
 320         wxXCursor* c = node->GetData();
 321         if (c->m_display == display)
 322             return c->m_cursor;
 323         node = node->GetNext();
 324     }
 325
 326     // No cursor for this display, so let's see if we're an id-type cursor.
 327
 328     if (M_CURSORDATA->m_cursorId != wxCURSOR_NONE)
 329     {
 330         WXCursor cursor = MakeCursor(display, M_CURSORDATA->m_cursorId);
 331         if (cursor)
 332         {
 333             wxXCursor* c = new wxXCursor;
 334             c->m_cursor = cursor;
 335             c->m_display = display;
 336             M_CURSORDATA->m_cursors.Append(c);
 337             return cursor;
 338         }
 339         else
 340             return (WXCursor) 0;
 341     }
 342
 343     // Not an id-type cursor, so we don't know how to create it.
 344     return (WXCursor) 0;
 345 }
 346
 347 // Make a cursor from standard id
 348 WXCursor wxCursor::MakeCursor(WXDisplay* display, wxStockCursor id) const
 349 {
 350     Display* dpy = (Display*) display;
 351     Cursor cursor = (Cursor) 0;
 352     int x_cur = -1;
 353
 354     switch (id)
 355     {
 356     case wxCURSOR_CHAR:             return (WXCursor)cursor;
 357
 358     case wxCURSOR_WAIT:             x_cur = XC_watch; break;
 359     case wxCURSOR_CROSS:            x_cur = XC_crosshair; break;
 360     case wxCURSOR_HAND:             x_cur = XC_hand1; break;
 361     case wxCURSOR_BULLSEYE:         x_cur = XC_target; break;
 362     case wxCURSOR_PENCIL:           x_cur = XC_pencil; break;
 363     case wxCURSOR_MAGNIFIER:        x_cur = XC_sizing; break;
 364     case wxCURSOR_IBEAM:            x_cur = XC_xterm; break;
 365     case wxCURSOR_NO_ENTRY:         x_cur = XC_pirate; break;
 366     case wxCURSOR_LEFT_BUTTON:      x_cur = XC_leftbutton; break;
 367     case wxCURSOR_RIGHT_BUTTON:     x_cur = XC_rightbutton; break;
 368     case wxCURSOR_MIDDLE_BUTTON:    x_cur =  XC_middlebutton; break;
 369     case wxCURSOR_QUESTION_ARROW:   x_cur = XC_question_arrow; break;
 370     case wxCURSOR_SIZING:           x_cur = XC_sizing; break;
 371     case wxCURSOR_WATCH:            x_cur = XC_watch; break;
 372     case wxCURSOR_SPRAYCAN:         x_cur = XC_spraycan; break;
 373     case wxCURSOR_PAINT_BRUSH:      x_cur = XC_spraycan; break;
 374     case wxCURSOR_SIZENWSE:
 375     case wxCURSOR_SIZENESW:         x_cur = XC_crosshair; break;
 376     case wxCURSOR_SIZEWE:           x_cur = XC_sb_h_double_arrow; break;
 377     case wxCURSOR_SIZENS:           x_cur = XC_sb_v_double_arrow; break;
 378     case wxCURSOR_POINT_LEFT:       x_cur = XC_sb_left_arrow; break;
 379     case wxCURSOR_POINT_RIGHT:      x_cur = XC_sb_right_arrow; break;
 380         // (JD Huggins) added more stock cursors for X
 381         // X-only cursors BEGIN
 382     case wxCURSOR_CROSS_REVERSE:    x_cur = XC_cross_reverse; break;
 383     case wxCURSOR_DOUBLE_ARROW:     x_cur = XC_double_arrow; break;
 384     case wxCURSOR_BASED_ARROW_UP:   x_cur = XC_based_arrow_up; break;
 385     case wxCURSOR_BASED_ARROW_DOWN: x_cur = XC_based_arrow_down; break;
 386     case wxCURSOR_BLANK:
 387     {
 388         GC gc;
 389         XGCValues gcv;
 390         Pixmap empty_pixmap;
 391         XColor blank_color;
 392
 393         empty_pixmap =
 394             XCreatePixmap (dpy, RootWindow (dpy, DefaultScreen (dpy)),
 395                            16, 16, 1);
 396         gcv.function = GXxor;
 397         gc = XCreateGC (dpy,
 398                         empty_pixmap,
 399                         GCFunction,
 400                         &gcv);
 401         XCopyArea (dpy,
 402                    empty_pixmap,
 403                    empty_pixmap,
 404                    gc,
 405                    0, 0,
 406                    16, 16,
 407                    0, 0);
 408         XFreeGC (dpy, gc);
 409         cursor = XCreatePixmapCursor (dpy,
 410                                       empty_pixmap,
 411                                       empty_pixmap,
 412                                       &blank_color,
 413                                       &blank_color,
 414                                       8, 8);
 415
 416         break;
 417     }
 418     case wxCURSOR_ARROW:
 419     default:       x_cur =  XC_top_left_arrow; break;
 420     }
 421
 422     if( x_cur == -1 )
 423         return (WXCursor)cursor;
 424
 425     cursor = XCreateFontCursor (dpy, x_cur);
 426     return (WXCursor) cursor;
 427 }
 428
 429 // Global cursor setting
 430 void wxSetCursor(const wxCursor& WXUNUSED(cursor))
 431 {
 432   // Nothing to do for Motif (no global cursor)
 433 }
 434
 435
 436 // ----------------------------------------------------------------------------
 437 // busy cursor stuff
 438 // ----------------------------------------------------------------------------
 439
 440 static int wxBusyCursorCount = 0;
 441
 442 // Helper function
 443 static void
 444 wxXSetBusyCursor (wxWindow * win, const wxCursor * cursor)
 445 {
 446     Display *display = (Display*) win->GetXDisplay();
 447
 448     Window xwin = (Window) win->GetXWindow();
 449     if (!xwin)
 450        return;
 451
 452     XSetWindowAttributes attrs;
 453
 454     if (cursor)
 455     {
 456         attrs.cursor = (Cursor) cursor->GetXCursor(display);
 457     }
 458     else
 459     {
 460         // Restore old cursor
 461         if (win->GetCursor().Ok())
 462             attrs.cursor = (Cursor) win->GetCursor().GetXCursor(display);
 463         else
 464             attrs.cursor = None;
 465     }
 466     if (xwin)
 467         XChangeWindowAttributes (display, xwin, CWCursor, &attrs);
 468
 469     XFlush (display);
 470
 471     for(wxWindowList::compatibility_iterator node = win->GetChildren().GetFirst (); node;
 472         node = node->GetNext())
 473     {
 474         wxWindow *child = node->GetData ();
 475         wxXSetBusyCursor (child, cursor);
 476     }
 477 }
 478
 479 // Set the cursor to the busy cursor for all windows
 480 void wxBeginBusyCursor(const wxCursor *cursor)
 481 {
 482     wxBusyCursorCount++;
 483     if (wxBusyCursorCount == 1)
 484     {
 485         for(wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst (); node;
 486             node = node->GetNext())
 487         {
 488             wxWindow *win = node->GetData ();
 489             wxXSetBusyCursor (win, cursor);
 490         }
 491     }
 492 }
 493
 494 // Restore cursor to normal
 495 void wxEndBusyCursor()
 496 {
 497     if (wxBusyCursorCount == 0)
 498         return;
 499
 500     wxBusyCursorCount--;
 501     if (wxBusyCursorCount == 0)
 502     {
 503         for(wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst (); node;
 504             node = node->GetNext())
 505         {
 506             wxWindow *win = node->GetData ();
 507             wxXSetBusyCursor (win, NULL);
 508         }
 509     }
 510 }
 511
 512 // true if we're between the above two calls
 513 bool wxIsBusy()
 514 {
 515     return (wxBusyCursorCount > 0);
 516 }