src/motif/dialog.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dialog.cpp
   3 // Purpose:     wxDialog 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 #ifdef __GNUG__
  13 #pragma implementation "dialog.h"
  14 #endif
  15
  16 #include "wx/dialog.h"
  17 #include "wx/utils.h"
  18 #include "wx/frame.h"
  19 #include "wx/app.h"
  20 #include "wx/settings.h"
  21
  22 #include <Xm/Xm.h>
  23
  24 #include <X11/Shell.h>
  25 #if XmVersion >= 1002
  26 #include <Xm/XmAll.h>
  27 #endif
  28 #include <Xm/MwmUtil.h>
  29 #include <Xm/Label.h>
  30 #include <Xm/BulletinB.h>
  31 #include <Xm/Frame.h>
  32 #include <Xm/Text.h>
  33 #include <Xm/DialogS.h>
  34 #include <Xm/FileSB.h>
  35 #include <Xm/RowColumn.h>
  36 #include <Xm/LabelG.h>
  37 #include <Xm/AtomMgr.h>
  38 #if   XmVersion > 1000
  39 #include <Xm/Protocols.h>
  40 #endif
  41
  42 #include "wx/motif/private.h"
  43
  44 static void wxCloseDialogCallback(Widget widget, XtPointer client_data, XmAnyCallbackStruct *cbs);
  45 static void wxDialogBoxRepaintProc(Widget w, XtPointer c_data, XEvent *event, char *);
  46 static void wxDialogBoxEventHandler (Widget    wid,
  47                               XtPointer client_data,
  48                               XEvent*   event,
  49                               Boolean *continueToDispatch);
  50
  51 static void wxUnmapBulletinBoard(Widget dialog, wxDialog *client,XtPointer call);
  52
  53 // A stack of modal_showing flags, since we can't rely
  54 // on accessing wxDialog::m_modalShowing within
  55 // wxDialog::Show in case a callback has deleted the wxDialog.
  56 static wxList wxModalShowingStack;
  57
  58 // Lists to keep track of windows, so we can disable/enable them
  59 // for modal dialogs
  60 wxList wxModalDialogs;
  61 wxList wxModelessWindows;  // Frames and modeless dialogs
  62 extern wxList wxPendingDelete;
  63
  64 #define wxUSE_INVISIBLE_RESIZE 1
  65
  66 #if !USE_SHARED_LIBRARY
  67 IMPLEMENT_DYNAMIC_CLASS(wxDialog, wxPanel)
  68
  69 BEGIN_EVENT_TABLE(wxDialog, wxPanel)
  70   EVT_BUTTON(wxID_OK, wxDialog::OnOK)
  71   EVT_BUTTON(wxID_APPLY, wxDialog::OnApply)
  72   EVT_BUTTON(wxID_CANCEL, wxDialog::OnCancel)
  73   EVT_CHAR_HOOK(wxDialog::OnCharHook)
  74   EVT_SYS_COLOUR_CHANGED(wxDialog::OnSysColourChanged)
  75   EVT_CLOSE(wxDialog::OnCloseWindow)
  76 END_EVENT_TABLE()
  77
  78 #endif
  79
  80 wxDialog::wxDialog()
  81 {
  82     m_modalShowing = FALSE;
  83     m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
  84 }
  85
  86 bool wxDialog::Create(wxWindow *parent, wxWindowID id,
  87            const wxString& title,
  88            const wxPoint& pos,
  89            const wxSize& size,
  90            long style,
  91            const wxString& name)
  92 {
  93     m_windowStyle = style;
  94     m_modalShowing = FALSE;
  95     m_dialogTitle = title;
  96
  97     m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
  98     m_foregroundColour = *wxBLACK;
  99
 100     SetName(name);
 101
 102     if (!parent)
 103         wxTopLevelWindows.Append(this);
 104
 105     if (parent) parent->AddChild(this);
 106
 107     if ( id == -1 )
 108         m_windowId = (int)NewControlId();
 109     else
 110         m_windowId = id;
 111
 112     Widget parentWidget = (Widget) 0;
 113     if (parent)
 114         parentWidget = (Widget) parent->GetTopWidget();
 115     if (!parent)
 116         parentWidget = (Widget) wxTheApp->GetTopLevelWidget();
 117
 118     wxASSERT_MSG( (parentWidget != (Widget) 0), "Could not find a suitable parent shell for dialog." );
 119
 120     Arg args[1];
 121     XtSetArg (args[0], XmNdefaultPosition, False);
 122     Widget dialogShell = XmCreateBulletinBoardDialog(parentWidget, (char*) (const char*) name, args, 1);
 123     m_mainWidget = (WXWidget) dialogShell;
 124
 125     // We don't want margins, since there is enough elsewhere.
 126     XtVaSetValues(dialogShell,
 127           XmNmarginHeight,   0,
 128           XmNmarginWidth,    0,
 129           XmNresizePolicy, XmRESIZE_NONE,
 130           NULL) ;
 131
 132     Widget shell = XtParent(dialogShell) ;
 133     if (!title.IsNull())
 134     {
 135         XmString str = XmStringCreateSimple((char*) (const char*)title);
 136         XtVaSetValues(dialogShell,
 137                       XmNdialogTitle, str,
 138                       NULL);
 139         XmStringFree(str);
 140     }
 141
 142     wxAddWindowToTable(dialogShell, this);
 143
 144     // Intercept CLOSE messages from the window manager
 145     Atom WM_DELETE_WINDOW = XmInternAtom(XtDisplay(shell), "WM_DELETE_WINDOW", False);
 146
 147     /* MATTHEW: [8] Remove and add WM_DELETE_WINDOW so ours is only handler */
 148     /* Why do we have to do this for wxDialog, but not wxFrame? */
 149     XmRemoveWMProtocols(shell, &WM_DELETE_WINDOW, 1);
 150     XmAddWMProtocols(shell, &WM_DELETE_WINDOW, 1);
 151     XmActivateWMProtocol(shell, WM_DELETE_WINDOW);
 152
 153     // Modified Steve Hammes for Motif 2.0
 154 #if (XmREVISION > 1 || XmVERSION > 1)
 155     XmAddWMProtocolCallback(shell, WM_DELETE_WINDOW, (XtCallbackProc) wxCloseDialogCallback, (XtPointer)this);
 156 #elif XmREVISION == 1
 157     XmAddWMProtocolCallback(shell, WM_DELETE_WINDOW, (XtCallbackProc) wxCloseDialogCallback, (caddr_t)this);
 158 #else
 159     XmAddWMProtocolCallback(shell, WM_DELETE_WINDOW, (void (*)())wxCloseDialogCallback, (caddr_t)this);
 160 #endif
 161
 162     XtTranslations ptr ;
 163     XtOverrideTranslations(dialogShell,
 164                 ptr = XtParseTranslationTable("<Configure>: resize()"));
 165     XtFree((char *)ptr);
 166
 167     // Can't remember what this was about... but I think it's necessary.
 168
 169     if (wxUSE_INVISIBLE_RESIZE)
 170     {
 171       if (pos.x > -1)
 172         XtVaSetValues(dialogShell, XmNx, pos.x,
 173                     NULL);
 174       if (pos.y > -1)
 175         XtVaSetValues(dialogShell, XmNy, pos.y,
 176                     NULL);
 177
 178       if (size.x > -1)
 179         XtVaSetValues(dialogShell, XmNwidth, size.x, NULL);
 180       if (size.y > -1)
 181         XtVaSetValues(dialogShell, XmNheight, size.y, NULL);
 182     }
 183
 184     // This patch come from Torsten Liermann lier@lier1.muc.de
 185     if (XmIsMotifWMRunning(shell))
 186     {
 187         int decor = 0 ;
 188         if (m_windowStyle & wxRESIZE_BORDER)
 189           decor |= MWM_DECOR_RESIZEH ;
 190         if (m_windowStyle & wxSYSTEM_MENU)
 191           decor |= MWM_DECOR_MENU;
 192         if ((m_windowStyle & wxCAPTION) ||
 193             (m_windowStyle & wxTINY_CAPTION_HORIZ) ||
 194             (m_windowStyle & wxTINY_CAPTION_VERT))
 195           decor |= MWM_DECOR_TITLE;
 196         if (m_windowStyle & wxTHICK_FRAME)
 197           decor |= MWM_DECOR_BORDER;
 198         if (m_windowStyle & wxMINIMIZE_BOX)
 199           decor |= MWM_DECOR_MINIMIZE;
 200         if (m_windowStyle & wxMAXIMIZE_BOX)
 201           decor |= MWM_DECOR_MAXIMIZE;
 202
 203         XtVaSetValues(shell,XmNmwmDecorations,decor,NULL) ;
 204     }
 205     // This allows non-Motif window managers to support at least the
 206     // no-decorations case.
 207     else
 208     {
 209       if ((m_windowStyle & wxCAPTION) != wxCAPTION)
 210           XtVaSetValues((Widget) shell,XmNoverrideRedirect,TRUE,NULL);
 211     }
 212
 213     XtRealizeWidget(dialogShell);
 214
 215     XtAddCallback(dialogShell,XmNunmapCallback,
 216                  (XtCallbackProc)wxUnmapBulletinBoard,this) ;
 217
 218     // Positioning of the dialog doesn't work properly unless the dialog
 219     // is managed, so we manage without mapping to the screen.
 220     // To show, we map the shell (actually it's parent).
 221     if (!wxUSE_INVISIBLE_RESIZE)
 222         XtVaSetValues(shell, XmNmappedWhenManaged, FALSE, NULL);
 223
 224     if (!wxUSE_INVISIBLE_RESIZE)
 225     {
 226         XtManageChild(dialogShell);
 227         SetSize(pos.x, pos.y, size.x, size.y);
 228     }
 229     XtAddEventHandler(dialogShell,ExposureMask,FALSE,
 230                           wxDialogBoxRepaintProc, (XtPointer) this);
 231
 232     XtAddEventHandler(dialogShell,
 233        ButtonPressMask | ButtonReleaseMask | PointerMotionMask | KeyPressMask,
 234        FALSE,
 235        wxDialogBoxEventHandler,
 236        (XtPointer)this);
 237
 238     ChangeBackgroundColour();
 239     SetFont(* parent->GetFont());
 240
 241     return TRUE;
 242 }
 243
 244 void wxDialog::SetModal(bool flag)
 245 {
 246     if ( flag )
 247         m_windowStyle |= wxDIALOG_MODAL ;
 248     else
 249         if ( m_windowStyle & wxDIALOG_MODAL )
 250           m_windowStyle -= wxDIALOG_MODAL ;
 251
 252   wxModelessWindows.DeleteObject(this);
 253   if (!flag)
 254     wxModelessWindows.Append(this);
 255 }
 256
 257 wxDialog::~wxDialog()
 258 {
 259     m_modalShowing = FALSE;
 260     if (!wxUSE_INVISIBLE_RESIZE && m_mainWidget)
 261     {
 262       XtUnmapWidget((Widget) m_mainWidget);
 263     }
 264
 265     wxTopLevelWindows.DeleteObject(this);
 266
 267     if ( (GetWindowStyleFlag() & wxDIALOG_MODAL) != wxDIALOG_MODAL )
 268       wxModelessWindows.DeleteObject(this);
 269
 270     // If this is the last top-level window, exit.
 271     if (wxTheApp && (wxTopLevelWindows.Number() == 0))
 272     {
 273       wxTheApp->SetTopWindow(NULL);
 274
 275       if (wxTheApp->GetExitOnFrameDelete())
 276       {
 277          wxTheApp->ExitMainLoop();
 278       }
 279     }
 280
 281     // This event-flushing code used to be in wxWindow::PostDestroyChildren (wx_dialog.cpp)
 282     // but I think this should work, if we destroy the children first.
 283     // Note that this might need to be done for wxFrame also.
 284     DestroyChildren();
 285
 286     // Now process all events, because otherwise
 287     // this might remain on the screen.
 288     Display* display;
 289     if (m_mainWidget)
 290       display = XtDisplay((Widget) m_mainWidget);
 291     else
 292       display = (Display*) wxGetDisplay();
 293
 294     XSync(display, FALSE);
 295     XEvent event;
 296     while (XtAppPending((XtAppContext) wxTheApp->GetAppContext())) {
 297       XFlush(display);
 298       XtAppNextEvent((XtAppContext) wxTheApp->GetAppContext(), &event);
 299       XtDispatchEvent(&event);
 300     }
 301 }
 302
 303 // By default, pressing escape cancels the dialog
 304 void wxDialog::OnCharHook(wxKeyEvent& event)
 305 {
 306   if (event.m_keyCode == WXK_ESCAPE)
 307   {
 308                 // Behaviour changed in 2.0: we'll send a Cancel message
 309                 // to the dialog instead of Close.
 310                 wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 311                 cancelEvent.SetEventObject( this );
 312                 GetEventHandler()->ProcessEvent(cancelEvent);
 313
 314                 return;
 315   }
 316   // We didn't process this event.
 317   event.Skip();
 318 }
 319
 320 void wxDialog::Iconize(bool WXUNUSED(iconize))
 321 {
 322   // Can't iconize a dialog in Motif, apparently
 323   // TODO: try using the parent of m_mainShell.
 324 //  XtVaSetValues((Widget) m_mainWidget, XmNiconic, iconize, NULL);
 325 }
 326
 327 bool wxDialog::IsIconized() const
 328 {
 329   /*
 330     Boolean iconic;
 331     XtVaGetValues((Widget) m_mainWidget, XmNiconic, &iconic, NULL);
 332
 333     return iconic;
 334    */
 335     return FALSE;
 336 }
 337
 338 void wxDialog::SetSize(int x, int y, int width, int height, int sizeFlags)
 339 {
 340     XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 341     wxWindow::SetSize(x, y, width, height, sizeFlags);
 342     XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 343 }
 344
 345 void wxDialog::SetClientSize(int width, int height)
 346 {
 347     SetSize(-1, -1, width, height);
 348 }
 349
 350
 351 void wxDialog::SetTitle(const wxString& title)
 352 {
 353     m_dialogTitle = title;
 354     if (!title.IsNull())
 355     {
 356         XmString str = XmStringCreateSimple((char*) (const char*) title);
 357         XtVaSetValues((Widget) m_mainWidget,
 358                   XmNtitle, (char*) (const char*) title,
 359                   XmNdialogTitle, str, // Roberto Cocchi
 360                   XmNiconName, (char*) (const char*) title,
 361                   NULL);
 362         XmStringFree(str);
 363     }
 364 }
 365
 366 wxString wxDialog::GetTitle() const
 367 {
 368   return m_dialogTitle;
 369 }
 370
 371 void wxDialog::Centre(int direction)
 372 {
 373   int x_offset,y_offset ;
 374   int display_width, display_height;
 375   int  width, height, x, y;
 376   wxWindow *parent = GetParent();
 377   if ((direction & wxCENTER_FRAME) && parent)
 378   {
 379       parent->GetPosition(&x_offset,&y_offset) ;
 380       parent->GetSize(&display_width,&display_height) ;
 381   }
 382   else
 383   {
 384     wxDisplaySize(&display_width, &display_height);
 385     x_offset = 0 ;
 386     y_offset = 0 ;
 387   }
 388
 389   GetSize(&width, &height);
 390   GetPosition(&x, &y);
 391
 392   if (direction & wxHORIZONTAL)
 393     x = (int)((display_width - width)/2);
 394   if (direction & wxVERTICAL)
 395     y = (int)((display_height - height)/2);
 396
 397   SetSize(x+x_offset, y+y_offset, width, height);
 398 }
 399
 400 void wxDialog::Raise()
 401 {
 402     Window parent_window = XtWindow((Widget) m_mainWidget),
 403            next_parent   = XtWindow((Widget) m_mainWidget),
 404            root          = RootWindowOfScreen(XtScreen((Widget) m_mainWidget));
 405     // search for the parent that is child of ROOT, because the WM may
 406     // reparent twice and notify only the next parent (like FVWM)
 407     while (next_parent != root) {
 408         Window *theChildren; unsigned int n;
 409         parent_window = next_parent;
 410         XQueryTree(XtDisplay((Widget) m_mainWidget), parent_window, &root,
 411                    &next_parent, &theChildren, &n);
 412         XFree(theChildren); // not needed
 413     }
 414     XRaiseWindow(XtDisplay((Widget) m_mainWidget), parent_window);
 415 }
 416
 417 void wxDialog::Lower()
 418 {
 419     Window parent_window = XtWindow((Widget) m_mainWidget),
 420            next_parent   = XtWindow((Widget) m_mainWidget),
 421            root          = RootWindowOfScreen(XtScreen((Widget) m_mainWidget));
 422     // search for the parent that is child of ROOT, because the WM may
 423     // reparent twice and notify only the next parent (like FVWM)
 424     while (next_parent != root) {
 425         Window *theChildren; unsigned int n;
 426         parent_window = next_parent;
 427         XQueryTree(XtDisplay((Widget) m_mainWidget), parent_window, &root,
 428                    &next_parent, &theChildren, &n);
 429         XFree(theChildren); // not needed
 430     }
 431     XLowerWindow(XtDisplay((Widget) m_mainWidget), parent_window);
 432 }
 433
 434 bool wxDialog::Show(bool show)
 435 {
 436     m_isShown = show;
 437
 438     if (show)
 439     {
 440         if (!wxUSE_INVISIBLE_RESIZE)
 441           XtMapWidget(XtParent((Widget) m_mainWidget));
 442         else
 443           XtManageChild((Widget) m_mainWidget) ;
 444
 445         XRaiseWindow(XtDisplay((Widget) m_mainWidget), XtWindow((Widget) m_mainWidget));
 446
 447     }
 448     else
 449     {
 450         if (!wxUSE_INVISIBLE_RESIZE)
 451             XtUnmapWidget(XtParent((Widget) m_mainWidget));
 452         else
 453             XtUnmanageChild((Widget) m_mainWidget) ;
 454
 455         XFlush(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()));
 456         XSync(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()), FALSE);
 457     }
 458
 459     return TRUE;
 460 }
 461
 462 // Shows a dialog modally, returning a return code
 463 int wxDialog::ShowModal()
 464 {
 465     m_windowStyle |= wxDIALOG_MODAL;
 466
 467     Show(TRUE);
 468
 469     if (m_modalShowing)
 470         return 0;
 471
 472     wxModalShowingStack.Insert((wxObject *)TRUE);
 473
 474     m_modalShowing = TRUE;
 475     XtAddGrab((Widget) m_mainWidget, TRUE, FALSE);
 476     XEvent event;
 477
 478     // Loop until we signal that the dialog should be closed
 479     while ((wxModalShowingStack.Number() > 0) && (bool)wxModalShowingStack.First()->Data())
 480     {
 481         XtAppProcessEvent((XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 482     }
 483
 484     // Remove modal dialog flag from stack
 485     wxNode *node = wxModalShowingStack.First();
 486     if (node)
 487       delete node;
 488
 489     // Now process all events in case they get sent to a destroyed dialog
 490     XSync(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()), FALSE);
 491     while (XtAppPending((XtAppContext) wxTheApp->GetAppContext()))
 492     {
 493         XFlush(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()));
 494         XtAppNextEvent((XtAppContext) wxTheApp->GetAppContext(), &event);
 495         XtDispatchEvent(&event);
 496     }
 497
 498     // TODO: is it safe to call this, if the dialog may have been deleted
 499     // by now? Probably only if we're using delayed deletion of dialogs.
 500     return GetReturnCode();
 501 }
 502
 503 void wxDialog::EndModal(int retCode)
 504 {
 505     if (!m_modalShowing)
 506         return;
 507
 508     SetReturnCode(retCode);
 509
 510     XtRemoveGrab((Widget) m_mainWidget);
 511
 512     Show(FALSE);
 513
 514     m_modalShowing = FALSE;
 515
 516     wxNode *node = wxModalShowingStack.First();
 517     if (node)
 518       node->SetData((wxObject *)FALSE);
 519 }
 520
 521 // Standard buttons
 522 void wxDialog::OnOK(wxCommandEvent& event)
 523 {
 524         if ( Validate() && TransferDataFromWindow() )
 525         {
 526         if ( IsModal() )
 527             EndModal(wxID_OK);
 528         else
 529         {
 530                     SetReturnCode(wxID_OK);
 531                     this->Show(FALSE);
 532         }
 533         }
 534 }
 535
 536 void wxDialog::OnApply(wxCommandEvent& event)
 537 {
 538         if (Validate())
 539                 TransferDataFromWindow();
 540         // TODO probably need to disable the Apply button until things change again
 541 }
 542
 543 void wxDialog::OnCancel(wxCommandEvent& event)
 544 {
 545     if ( IsModal() )
 546         EndModal(wxID_CANCEL);
 547     else
 548     {
 549         SetReturnCode(wxID_CANCEL);
 550                 this->Show(FALSE);
 551     }
 552 }
 553
 554 bool wxDialog::OnClose()
 555 {
 556         // Behaviour changed in 2.0: we'll send a Cancel message by default,
 557     // which may close the dialog.
 558     // Check for looping if the Cancel event handler calls Close()
 559
 560     static wxList closing;
 561
 562     if ( closing.Member(this) )
 563         return FALSE;
 564
 565     closing.Append(this);
 566
 567         wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 568         cancelEvent.SetEventObject( this );
 569         GetEventHandler()->ProcessEvent(cancelEvent);
 570
 571     closing.DeleteObject(this);
 572
 573         return FALSE;
 574 }
 575
 576 void wxDialog::OnCloseWindow(wxCloseEvent& event)
 577 {
 578     // Compatibility
 579     if ( GetEventHandler()->OnClose() || event.GetForce())
 580     {
 581         this->Destroy();
 582     }
 583 }
 584
 585 // Destroy the window (delayed, if a managed window)
 586 bool wxDialog::Destroy()
 587 {
 588   if (!wxPendingDelete.Member(this))
 589     wxPendingDelete.Append(this);
 590   return TRUE;
 591 }
 592
 593 void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& event)
 594 {
 595   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 596   Refresh();
 597 }
 598
 599 void wxDialog::Fit()
 600 {
 601 }
 602
 603 // Handle a close event from the window manager
 604 static void wxCloseDialogCallback(Widget widget, XtPointer client_data, XmAnyCallbackStruct *cbs)
 605 {
 606   wxDialog *dialog = (wxDialog *)client_data;
 607   wxCloseEvent closeEvent(wxEVT_CLOSE_WINDOW, dialog->GetId());
 608   closeEvent.SetEventObject(dialog);
 609
 610   // May delete the dialog (with delayed deletion)
 611   dialog->GetEventHandler()->ProcessEvent(closeEvent);
 612 }
 613
 614 // TODO: Preferably, we should have a universal repaint proc.
 615 // Meanwhile, use a special one for dialogs.
 616 static void wxDialogBoxRepaintProc(Widget w, XtPointer c_data, XEvent *event, char *)
 617    {
 618      Window window;
 619      static XRectangle *xrect;
 620      Display *display;
 621      GC gc;
 622      int llp = 0;
 623      static int last_count = 0;
 624      static int draw_count = 0;
 625
 626      wxWindow* win = (wxWindow *)wxWidgetHashTable->Get((long)w);
 627      if (!win)
 628        return;
 629
 630      switch(event -> type)
 631         {
 632           case Expose :
 633                window = (Window) win -> GetXWindow();
 634                display = (Display *) win -> GetXDisplay();
 635                /* TODO
 636                gc = (GC) panel -> GetDC() -> gc;
 637
 638                llp = event -> xexpose.count;
 639
 640                if ((last_count == 0) && (llp == 0))
 641                   {
 642                     xrect = new XRectangle[1];
 643                     xrect[0].x = event -> xexpose.x;
 644                     xrect[0].y = event -> xexpose.y;
 645                     xrect[0].width = event -> xexpose.width;
 646                     xrect[0].height = event -> xexpose.height;
 647
 648                     XSetClipRectangles(display,gc,0,0,xrect,1,Unsorted);
 649 //                    panel->DoPaint(xrect, 1);
 650                     panel->GetEventHandler()->OnPaint();
 651
 652                     delete xrect;
 653                   }
 654
 655                if ((last_count == 0) && (llp != 0))
 656                   {
 657                     xrect = new XRectangle[llp + 1];
 658                     draw_count = llp + 1;
 659
 660                     xrect[draw_count - llp - 1].x = event -> xexpose.x;
 661                     xrect[draw_count - llp - 1].y = event -> xexpose.y;
 662                     xrect[draw_count - llp - 1].width = event -> xexpose.width;
 663                     xrect[draw_count - llp - 1].height = event -> xexpose.height;
 664                   }
 665
 666                if ((last_count != 0) && (llp != 0))
 667                   {
 668                     xrect[draw_count - llp - 1].x = event -> xexpose.x;
 669                     xrect[draw_count - llp - 1].y = event -> xexpose.y;
 670                     xrect[draw_count - llp - 1].width = event -> xexpose.width;
 671                     xrect[draw_count - llp - 1].height = event -> xexpose.height;
 672                   }
 673
 674                if ((last_count != 0) && (llp == 0))
 675                   {
 676                     xrect[draw_count - llp - 1].x = event -> xexpose.x;
 677                     xrect[draw_count - llp - 1].y = event -> xexpose.y;
 678                     xrect[draw_count - llp - 1].width = event -> xexpose.width;
 679                     xrect[draw_count - llp - 1].height = event -> xexpose.height;
 680
 681                     XSetClipRectangles(display,gc,0,0,xrect,draw_count,Unsorted);
 682 //                    panel->DoPaint(xrect,draw_count);
 683                     panel->GetEventHandler()->OnPaint();
 684
 685                     delete xrect;
 686                   }
 687                last_count = event -> xexpose.count;
 688                */
 689                break;
 690           default :
 691                cout << "\n\nNew Event ! is = " << event -> type << "\n";
 692                break;
 693         }
 694    }
 695
 696 static void wxDialogBoxEventHandler (Widget    wid,
 697                               XtPointer client_data,
 698                               XEvent*   event,
 699                               Boolean *continueToDispatch)
 700 {
 701   wxDialog *dialog = (wxDialog *)wxWidgetHashTable->Get((long)wid);
 702   if (dialog)
 703   {
 704     wxMouseEvent wxevent(wxEVT_NULL);
 705     if (wxTranslateMouseEvent(wxevent, dialog, wid, event))
 706     {
 707         wxevent.SetEventObject(dialog);
 708         wxevent.SetId(dialog->GetId());
 709         dialog->GetEventHandler()->ProcessEvent(wxevent);
 710     }
 711     else
 712     {
 713       // An attempt to implement OnCharHook by calling OnCharHook first;
 714       // if this returns TRUE, set continueToDispatch to False
 715       // (don't continue processing).
 716       // Otherwise set it to True and call OnChar.
 717       wxKeyEvent keyEvent(wxEVENT_TYPE_CHAR);
 718       if (wxTranslateKeyEvent(keyEvent, dialog, wid, event))
 719       {
 720         keyEvent.SetEventObject(dialog);
 721         keyEvent.SetId(dialog->GetId());
 722         keyEvent.SetEventType(wxEVT_CHAR_HOOK);
 723         if (dialog->GetEventHandler()->ProcessEvent(keyEvent))
 724         {
 725             *continueToDispatch = False;
 726             return;
 727         }
 728         else
 729         {
 730             keyEvent.SetEventType(wxEVT_CHAR);
 731             dialog->GetEventHandler()->ProcessEvent(keyEvent);
 732         }
 733       }
 734     }
 735   }
 736   *continueToDispatch = True;
 737 }
 738
 739 static void wxUnmapBulletinBoard(Widget dialog, wxDialog *client,XtPointer call)
 740 {
 741   /* This gets called when the dialog is being shown, which
 742    * defeats modal showing.
 743   client->m_modalShowing = FALSE ;
 744   client->m_isShown = FALSE;
 745   */
 746 }
 747
 748 void wxDialog::ChangeFont()
 749 {
 750     // TODO
 751 }
 752
 753 void wxDialog::ChangeBackgroundColour()
 754 {
 755     // TODO
 756 }
 757
 758 void wxDialog::ChangeForegroundColour()
 759 {
 760     // TODO
 761 }
 762