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