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[wxWidgets.git] / src / motif / dialog.cpp
index d8bce29403eea14afe1f224decfca170ab401f60..d298056eb68c5bfef407405f8663790ea84ed71d 100644 (file)
 #include "wx/app.h"
 #include "wx/settings.h"
 
+#include <Xm/Xm.h>
+
+#include <X11/Shell.h>
+#if XmVersion >= 1002
+#include <Xm/XmAll.h>
+#endif
+#include <Xm/MwmUtil.h>
+#include <Xm/Label.h>
+#include <Xm/BulletinB.h>
+#include <Xm/Frame.h>
+#include <Xm/Text.h>
+#include <Xm/DialogS.h>
+#include <Xm/FileSB.h>
+#include <Xm/RowColumn.h>
+#include <Xm/LabelG.h>
+#include <Xm/AtomMgr.h>
+#if   XmVersion > 1000
+#include <Xm/Protocols.h>
+#endif
+
+#include "wx/motif/private.h"
+
+static void wxCloseDialogCallback(Widget widget, XtPointer client_data, XmAnyCallbackStruct *cbs);
+static void wxDialogBoxEventHandler (Widget    wid,
+                                     XtPointer client_data,
+                                     XEvent*   event,
+                                     Boolean *continueToDispatch);
+
+static void wxUnmapBulletinBoard(Widget dialog, wxDialog *client,XtPointer call);
+
+// A stack of modal_showing flags, since we can't rely
+// on accessing wxDialog::m_modalShowing within
+// wxDialog::Show in case a callback has deleted the wxDialog.
+static wxList wxModalShowingStack;
+
 // Lists to keep track of windows, so we can disable/enable them
 // for modal dialogs
 wxList wxModalDialogs;
 wxList wxModelessWindows;  // Frames and modeless dialogs
 extern wxList wxPendingDelete;
 
+extern wxHashTable *wxWidgetHashTable;
+
+#define wxUSE_INVISIBLE_RESIZE 1
+
 #if !USE_SHARED_LIBRARY
 IMPLEMENT_DYNAMIC_CLASS(wxDialog, wxPanel)
 
 BEGIN_EVENT_TABLE(wxDialog, wxPanel)
-  EVT_BUTTON(wxID_OK, wxDialog::OnOK)
-  EVT_BUTTON(wxID_APPLY, wxDialog::OnApply)
-  EVT_BUTTON(wxID_CANCEL, wxDialog::OnCancel)
-  EVT_CHAR_HOOK(wxDialog::OnCharHook)
-  EVT_SYS_COLOUR_CHANGED(wxDialog::OnSysColourChanged)
-  EVT_CLOSE(wxDialog::OnCloseWindow)
+EVT_BUTTON(wxID_OK, wxDialog::OnOK)
+EVT_BUTTON(wxID_APPLY, wxDialog::OnApply)
+EVT_BUTTON(wxID_CANCEL, wxDialog::OnCancel)
+EVT_CHAR_HOOK(wxDialog::OnCharHook)
+EVT_SYS_COLOUR_CHANGED(wxDialog::OnSysColourChanged)
+EVT_CLOSE(wxDialog::OnCloseWindow)
 END_EVENT_TABLE()
 
 #endif
 
 wxDialog::wxDialog()
 {
-    SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
+    m_modalShowing = FALSE;
+    m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
 }
 
 bool wxDialog::Create(wxWindow *parent, wxWindowID id,
-           const wxString& title,
-           const wxPoint& pos,
-           const wxSize& size,
-           long style,
-           const wxString& name)
+                      const wxString& title,
+                      const wxPoint& pos,
+                      const wxSize& size,
+                      long style,
+                      const wxString& name)
 {
-  m_windowStyle = style;
-
-  SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
-  SetName(name);
-  
-  if (!parent)
-    wxTopLevelWindows.Append(this);
-
-  if (parent) parent->AddChild(this);
-
-  if ( id == -1 )
-       m_windowId = (int)NewControlId();
-  else
-       m_windowId = id;
-
-  // TODO: create dialog
-
-  return FALSE;
+    m_windowStyle = style;
+    m_modalShowing = FALSE;
+    m_dialogTitle = title;
+    
+    m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
+    m_foregroundColour = *wxBLACK;
+    
+    SetName(name);
+    
+    if (!parent)
+        wxTopLevelWindows.Append(this);
+    
+    if (parent) parent->AddChild(this);
+    
+    if ( id == -1 )
+        m_windowId = (int)NewControlId();
+    else
+        m_windowId = id;
+    
+    Widget parentWidget = (Widget) 0;
+    if (parent)
+        parentWidget = (Widget) parent->GetTopWidget();
+    if (!parent)
+        parentWidget = (Widget) wxTheApp->GetTopLevelWidget();
+    
+    wxASSERT_MSG( (parentWidget != (Widget) 0), "Could not find a suitable parent shell for dialog." );
+    
+    Arg args[2];
+    XtSetArg (args[0], XmNdefaultPosition, False);
+    XtSetArg (args[1], XmNautoUnmanage, False);
+    Widget dialogShell = XmCreateBulletinBoardDialog(parentWidget, (char*) (const char*) name, args, 2);
+    m_mainWidget = (WXWidget) dialogShell;
+    
+    // We don't want margins, since there is enough elsewhere.
+    XtVaSetValues(dialogShell,
+        XmNmarginHeight,   0,
+        XmNmarginWidth,    0,
+        XmNresizePolicy, XmRESIZE_NONE,
+        NULL) ;
+    
+    Widget shell = XtParent(dialogShell) ;
+    if (!title.IsNull())
+    {
+        XmString str = XmStringCreateSimple((char*) (const char*)title);
+        XtVaSetValues(dialogShell,
+            XmNdialogTitle, str,
+            NULL);
+        XmStringFree(str);
+    }
+    
+    m_font = wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT);
+    ChangeFont(FALSE);
+    
+    wxAddWindowToTable(dialogShell, this);
+    
+    // Intercept CLOSE messages from the window manager
+    Atom WM_DELETE_WINDOW = XmInternAtom(XtDisplay(shell), "WM_DELETE_WINDOW", False);
+    
+    /* Remove and add WM_DELETE_WINDOW so ours is only handler */
+    /* Why do we have to do this for wxDialog, but not wxFrame? */
+    XmRemoveWMProtocols(shell, &WM_DELETE_WINDOW, 1);
+    XmAddWMProtocols(shell, &WM_DELETE_WINDOW, 1);
+    XmActivateWMProtocol(shell, WM_DELETE_WINDOW);
+    
+    // Modified Steve Hammes for Motif 2.0
+#if (XmREVISION > 1 || XmVERSION > 1)
+    XmAddWMProtocolCallback(shell, WM_DELETE_WINDOW, (XtCallbackProc) wxCloseDialogCallback, (XtPointer)this);
+#elif XmREVISION == 1
+    XmAddWMProtocolCallback(shell, WM_DELETE_WINDOW, (XtCallbackProc) wxCloseDialogCallback, (caddr_t)this);
+#else
+    XmAddWMProtocolCallback(shell, WM_DELETE_WINDOW, (void (*)())wxCloseDialogCallback, (caddr_t)this);
+#endif
+    
+    XtTranslations ptr ;
+    XtOverrideTranslations(dialogShell,
+        ptr = XtParseTranslationTable("<Configure>: resize()"));
+    XtFree((char *)ptr);
+    
+    // Can't remember what this was about... but I think it's necessary.
+    
+    if (wxUSE_INVISIBLE_RESIZE)
+    {
+        if (pos.x > -1)
+            XtVaSetValues(dialogShell, XmNx, pos.x,
+            NULL);
+        if (pos.y > -1)
+            XtVaSetValues(dialogShell, XmNy, pos.y,
+            NULL);
+        
+        if (size.x > -1)
+            XtVaSetValues(dialogShell, XmNwidth, size.x, NULL);
+        if (size.y > -1)
+            XtVaSetValues(dialogShell, XmNheight, size.y, NULL);
+    }
+    
+    // This patch come from Torsten Liermann lier@lier1.muc.de
+    if (XmIsMotifWMRunning(shell))
+    {
+        int decor = 0 ;
+        if (m_windowStyle & wxRESIZE_BORDER)
+            decor |= MWM_DECOR_RESIZEH ;
+        if (m_windowStyle & wxSYSTEM_MENU)
+            decor |= MWM_DECOR_MENU;
+        if ((m_windowStyle & wxCAPTION) ||
+            (m_windowStyle & wxTINY_CAPTION_HORIZ) ||
+            (m_windowStyle & wxTINY_CAPTION_VERT))
+            decor |= MWM_DECOR_TITLE;
+        if (m_windowStyle & wxTHICK_FRAME)
+            decor |= MWM_DECOR_BORDER;
+        if (m_windowStyle & wxMINIMIZE_BOX)
+            decor |= MWM_DECOR_MINIMIZE;
+        if (m_windowStyle & wxMAXIMIZE_BOX)
+            decor |= MWM_DECOR_MAXIMIZE;
+        
+        XtVaSetValues(shell,XmNmwmDecorations,decor,NULL) ;
+    }
+    // This allows non-Motif window managers to support at least the
+    // no-decorations case.
+    else
+    {
+        if ((m_windowStyle & wxCAPTION) != wxCAPTION)
+            XtVaSetValues((Widget) shell,XmNoverrideRedirect,TRUE,NULL);
+    }
+    
+    XtRealizeWidget(dialogShell);
+    
+    XtAddCallback(dialogShell,XmNunmapCallback,
+        (XtCallbackProc)wxUnmapBulletinBoard,this) ;
+    
+    // Positioning of the dialog doesn't work properly unless the dialog
+    // is managed, so we manage without mapping to the screen.
+    // To show, we map the shell (actually it's parent).
+    if (!wxUSE_INVISIBLE_RESIZE)
+        XtVaSetValues(shell, XmNmappedWhenManaged, FALSE, NULL);
+    
+    if (!wxUSE_INVISIBLE_RESIZE)
+    {
+        XtManageChild(dialogShell);
+        SetSize(pos.x, pos.y, size.x, size.y);
+    }
+    XtAddEventHandler(dialogShell,ExposureMask,FALSE,
+        wxUniversalRepaintProc, (XtPointer) this);
+    
+    XtAddEventHandler(dialogShell,
+        ButtonPressMask | ButtonReleaseMask | PointerMotionMask | KeyPressMask,
+        FALSE,
+        wxDialogBoxEventHandler,
+        (XtPointer)this);
+    
+    ChangeBackgroundColour();
+    
+    return TRUE;
 }
 
 void wxDialog::SetModal(bool flag)
 {
-       if ( flag )
-               m_windowStyle |= wxDIALOG_MODAL ;
-       else
-               if ( m_windowStyle & wxDIALOG_MODAL )
-                       m_windowStyle -= wxDIALOG_MODAL ;
-  
-  wxModelessWindows.DeleteObject(this);
-  if (!flag)
-    wxModelessWindows.Append(this);
+    if ( flag )
+        m_windowStyle |= wxDIALOG_MODAL ;
+    else
+        if ( m_windowStyle & wxDIALOG_MODAL )
+            m_windowStyle -= wxDIALOG_MODAL ;
+        
+        wxModelessWindows.DeleteObject(this);
+        if (!flag)
+            wxModelessWindows.Append(this);
 }
 
 wxDialog::~wxDialog()
 {
-    // TODO
+    if (m_mainWidget)
+      XtRemoveEventHandler((Widget) m_mainWidget, ExposureMask, FALSE,
+          wxUniversalRepaintProc, (XtPointer) this);
+    
+    m_modalShowing = FALSE;
+    if (!wxUSE_INVISIBLE_RESIZE && m_mainWidget)
+    {
+        XtUnmapWidget((Widget) m_mainWidget);
+    }
+    
     wxTopLevelWindows.DeleteObject(this);
-
+    
     if ( (GetWindowStyleFlag() & wxDIALOG_MODAL) != wxDIALOG_MODAL )
-      wxModelessWindows.DeleteObject(this);
-
+        wxModelessWindows.DeleteObject(this);
+    
     // If this is the last top-level window, exit.
     if (wxTheApp && (wxTopLevelWindows.Number() == 0))
     {
-      wxTheApp->SetTopWindow(NULL);
-
-      if (wxTheApp->GetExitOnFrameDelete())
-      {
-         // TODO: exit
-      }
+        wxTheApp->SetTopWindow(NULL);
+        
+        if (wxTheApp->GetExitOnFrameDelete())
+        {
+            wxTheApp->ExitMainLoop();
+        }
+    }
+    
+    // This event-flushing code used to be in wxWindow::PostDestroyChildren (wx_dialog.cpp)
+    // but I think this should work, if we destroy the children first.
+    // Note that this might need to be done for wxFrame also.
+    DestroyChildren();
+
+    // The idea about doing it here is that if you have to remove the
+    // XtDestroyWidget from ~wxWindow, at least top-level windows
+    // will still be deleted (and destroy children implicitly).
+    if (GetMainWidget())
+    {
+      DetachWidget(GetMainWidget()); // Removes event handlers
+      XtDestroyWidget((Widget) GetMainWidget());
+      SetMainWidget((WXWidget) NULL);
     }
 }
 
 // By default, pressing escape cancels the dialog
 void wxDialog::OnCharHook(wxKeyEvent& event)
 {
-  if (event.m_keyCode == WXK_ESCAPE)
-  {
-               // Behaviour changed in 2.0: we'll send a Cancel message
-               // to the dialog instead of Close.
-               wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
-               cancelEvent.SetEventObject( this );
-               GetEventHandler()->ProcessEvent(cancelEvent);
-
-               return;
-  }
-  // We didn't process this event.
-  event.Skip();
+    if (event.m_keyCode == WXK_ESCAPE)
+    {
+        // Behaviour changed in 2.0: we'll send a Cancel message
+        // to the dialog instead of Close.
+        wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
+        cancelEvent.SetEventObject( this );
+        GetEventHandler()->ProcessEvent(cancelEvent);
+        
+        return;
+    }
+    // We didn't process this event.
+    event.Skip();
 }
 
 void wxDialog::Iconize(bool WXUNUSED(iconize))
 {
-    // TODO
+    // Can't iconize a dialog in Motif, apparently
+    // TODO: try using the parent of m_mainShell.
+    //  XtVaSetValues((Widget) m_mainWidget, XmNiconic, iconize, NULL);
 }
 
 bool wxDialog::IsIconized() const
 {
-    // TODO
-    return FALSE;
-}
+/*
+Boolean iconic;
+XtVaGetValues((Widget) m_mainWidget, XmNiconic, &iconic, NULL);
 
-void wxDialog::SetClientSize(int width, int height)
-{
-    // TODO
+  return iconic;
+    */
+    return FALSE;
 }
 
-void wxDialog::GetPosition(int *x, int *y) const
+void wxDialog::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 {
-    // TODO
+    XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
+    wxWindow::DoSetSize(x, y, width, height, sizeFlags);
+    XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 }
 
-bool wxDialog::Show(bool show)
+void wxDialog::DoSetClientSize(int width, int height)
 {
-    // TODO
-    return FALSE;
+    wxWindow::SetSize(-1, -1, width, height);
 }
 
 void wxDialog::SetTitle(const wxString& title)
 {
-    // TODO
+    m_dialogTitle = title;
+    if (!title.IsNull())
+    {
+        XmString str = XmStringCreateSimple((char*) (const char*) title);
+        XtVaSetValues((Widget) m_mainWidget, 
+            XmNtitle, (char*) (const char*) title,
+            XmNdialogTitle, str, // Roberto Cocchi
+            XmNiconName, (char*) (const char*) title,
+            NULL);
+        XmStringFree(str);
+    }
 }
 
 wxString wxDialog::GetTitle() const
 {
-    // TODO
-    return wxString("");
+    return m_dialogTitle;
 }
 
 void wxDialog::Centre(int direction)
 {
-  int x_offset,y_offset ;
-  int display_width, display_height;
-  int  width, height, x, y;
-  wxFrame *frame ;
-  if (direction & wxCENTER_FRAME)
-  {
-    frame = (wxFrame*)GetParent() ;
-    if (frame)
+    int x_offset,y_offset ;
+    int display_width, display_height;
+    int  width, height, x, y;
+    wxWindow *parent = GetParent();
+    if ((direction & wxCENTER_FRAME) && parent)
+    {
+        parent->GetPosition(&x_offset,&y_offset) ;
+        parent->GetSize(&display_width,&display_height) ;
+    }
+    else
+    {
+        wxDisplaySize(&display_width, &display_height);
+        x_offset = 0 ;
+        y_offset = 0 ;
+    }
+    
+    GetSize(&width, &height);
+    GetPosition(&x, &y);
+    
+    if (direction & wxHORIZONTAL)
+        x = (int)((display_width - width)/2);
+    if (direction & wxVERTICAL)
+        y = (int)((display_height - height)/2);
+    
+    SetSize(x+x_offset, y+y_offset, width, height);
+}
+
+void wxDialog::Raise()
+{
+    Window parent_window = XtWindow((Widget) m_mainWidget),
+        next_parent   = XtWindow((Widget) m_mainWidget),
+        root          = RootWindowOfScreen(XtScreen((Widget) m_mainWidget));
+    // search for the parent that is child of ROOT, because the WM may
+    // reparent twice and notify only the next parent (like FVWM)
+    while (next_parent != root) {
+        Window *theChildren; unsigned int n;
+        parent_window = next_parent;
+        XQueryTree(XtDisplay((Widget) m_mainWidget), parent_window, &root,
+            &next_parent, &theChildren, &n);
+        XFree(theChildren); // not needed
+    }
+    XRaiseWindow(XtDisplay((Widget) m_mainWidget), parent_window);
+}
+
+void wxDialog::Lower()
+{
+    Window parent_window = XtWindow((Widget) m_mainWidget),
+        next_parent   = XtWindow((Widget) m_mainWidget),
+        root          = RootWindowOfScreen(XtScreen((Widget) m_mainWidget));
+    // search for the parent that is child of ROOT, because the WM may
+    // reparent twice and notify only the next parent (like FVWM)
+    while (next_parent != root) {
+        Window *theChildren; unsigned int n;
+        parent_window = next_parent;
+        XQueryTree(XtDisplay((Widget) m_mainWidget), parent_window, &root,
+            &next_parent, &theChildren, &n);
+        XFree(theChildren); // not needed
+    }
+    XLowerWindow(XtDisplay((Widget) m_mainWidget), parent_window);
+}
+
+bool wxDialog::Show(bool show)
+{
+    m_isShown = show;
+    
+    if (show)
+    {
+        if (!wxUSE_INVISIBLE_RESIZE)
+            XtMapWidget(XtParent((Widget) m_mainWidget));
+        else
+            XtManageChild((Widget) m_mainWidget) ; 
+        
+        XRaiseWindow(XtDisplay((Widget) m_mainWidget), XtWindow((Widget) m_mainWidget));
+        
+    }
+    else
     {
-      frame->GetPosition(&x_offset,&y_offset) ;
-      frame->GetSize(&display_width,&display_height) ;
+        if (!wxUSE_INVISIBLE_RESIZE)
+            XtUnmapWidget(XtParent((Widget) m_mainWidget));
+        else
+            XtUnmanageChild((Widget) m_mainWidget) ;
+        
+        XFlush(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()));
+        XSync(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()), FALSE);
     }
-  }
-  else
-    frame = NULL ;
-
-  if (frame==NULL)
-  {
-    wxDisplaySize(&display_width, &display_height);
-    x_offset = 0 ;
-    y_offset = 0 ;
-  }
-
-  GetSize(&width, &height);
-  GetPosition(&x, &y);
-
-  if (direction & wxHORIZONTAL)
-    x = (int)((display_width - width)/2);
-  if (direction & wxVERTICAL)
-    y = (int)((display_height - height)/2);
-
-  SetSize(x+x_offset, y+y_offset, width, height);
+    
+    return TRUE;
 }
 
-// Replacement for Show(TRUE) for modal dialogs - returns return code
+// Shows a dialog modally, returning a return code
 int wxDialog::ShowModal()
 {
     m_windowStyle |= wxDIALOG_MODAL;
-    // TODO: modal showing
-       Show(TRUE);
-       return GetReturnCode();
+    
+    Show(TRUE);
+    
+    if (m_modalShowing)
+        return 0;
+    
+    wxModalShowingStack.Insert((wxObject *)TRUE);
+    
+    m_modalShowing = TRUE;
+    XtAddGrab((Widget) m_mainWidget, TRUE, FALSE);
+    
+    XEvent event;
+    
+    // Loop until we signal that the dialog should be closed
+    while ((wxModalShowingStack.Number() > 0) && ((int)(wxModalShowingStack.First()->Data()) != 0))
+    {
+        //        XtAppProcessEvent((XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
+        
+        XtAppNextEvent((XtAppContext) wxTheApp->GetAppContext(), &event);
+        wxTheApp->ProcessXEvent((WXEvent*) &event);
+    }
+    
+    // Remove modal dialog flag from stack
+    wxNode *node = wxModalShowingStack.First();
+    if (node)
+        delete node;
+    
+    // Now process all events in case they get sent to a destroyed dialog
+    XSync(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()), FALSE);
+    while (XtAppPending((XtAppContext) wxTheApp->GetAppContext()))
+    {
+        XFlush(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()));
+        XtAppNextEvent((XtAppContext) wxTheApp->GetAppContext(), &event);
+        
+        wxTheApp->ProcessXEvent((WXEvent*) &event);
+    }
+    
+    // TODO: is it safe to call this, if the dialog may have been deleted
+    // by now? Probably only if we're using delayed deletion of dialogs.
+    return GetReturnCode();
 }
 
 void wxDialog::EndModal(int retCode)
 {
-       SetReturnCode(retCode);
-    // TODO modal un-showing
-       Show(FALSE);
+    if (!m_modalShowing)
+        return;
+    
+    SetReturnCode(retCode);
+    
+    // Strangely, we don't seem to need this now.
+    //    XtRemoveGrab((Widget) m_mainWidget);
+    
+    Show(FALSE);
+    
+    m_modalShowing = FALSE;
+    
+    wxNode *node = wxModalShowingStack.First();
+    if (node)
+        node->SetData((wxObject *)FALSE);
 }
 
 // Standard buttons
-void wxDialog::OnOK(wxCommandEvent& event)
+void wxDialog::OnOK(wxCommandEvent& WXUNUSED(event))
 {
-       if ( Validate() && TransferDataFromWindow() )
-       {
+    if ( Validate() && TransferDataFromWindow() )
+    {
         if ( IsModal() )
             EndModal(wxID_OK);
         else
         {
-                   SetReturnCode(wxID_OK);
-                   this->Show(FALSE);
+            SetReturnCode(wxID_OK);
+            this->Show(FALSE);
         }
-       }
+    }
 }
 
-void wxDialog::OnApply(wxCommandEvent& event)
+void wxDialog::OnApply(wxCommandEvent& WXUNUSED(event))
 {
-       if (Validate())
-               TransferDataFromWindow();
-       // TODO probably need to disable the Apply button until things change again
+    if (Validate())
+        TransferDataFromWindow();
+    // TODO probably need to disable the Apply button until things change again
 }
 
-void wxDialog::OnCancel(wxCommandEvent& event)
+void wxDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
 {
     if ( IsModal() )
         EndModal(wxID_CANCEL);
     else
     {
         SetReturnCode(wxID_CANCEL);
-               this->Show(FALSE);
+        this->Show(FALSE);
     }
 }
 
-bool wxDialog::OnClose()
+void wxDialog::OnCloseWindow(wxCloseEvent& event)
 {
-       // Behaviour changed in 2.0: we'll send a Cancel message by default,
+    // We'll send a Cancel message by default,
     // which may close the dialog.
-    // Check for looping if the Cancel event handler calls Close()
+    // Check for looping if the Cancel event handler calls Close().
+
+    // Note that if a cancel button and handler aren't present in the dialog,
+    // nothing will happen when you close the dialog via the window manager, or
+    // via Close().
+    // We wouldn't want to destroy the dialog by default, since the dialog may have been
+    // created on the stack.
+    // However, this does mean that calling dialog->Close() won't delete the dialog
+    // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
+    // sure to destroy the dialog.
+    // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 
     static wxList closing;
-
+    
     if ( closing.Member(this) )
-        return FALSE;
-
+        return;
+    
     closing.Append(this);
-
-       wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
-       cancelEvent.SetEventObject( this );
-       GetEventHandler()->ProcessEvent(cancelEvent);
+    
+    wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
+    cancelEvent.SetEventObject( this );
+    GetEventHandler()->ProcessEvent(cancelEvent); // This may close the dialog
 
     closing.DeleteObject(this);
-
-       return FALSE;
 }
 
-void wxDialog::OnCloseWindow(wxCloseEvent& event)
+void wxDialog::OnPaint(wxPaintEvent &WXUNUSED(event))
 {
-    // Compatibility
-    if ( GetEventHandler()->OnClose() || event.GetForce())
-    {
-        this->Destroy();
-    }
+  // added for compatiblity only
 }
 
 // Destroy the window (delayed, if a managed window)
 bool wxDialog::Destroy()
 {
-  if (!wxPendingDelete.Member(this))
-    wxPendingDelete.Append(this);
-  return TRUE;
+    if (!wxPendingDelete.Member(this))
+        wxPendingDelete.Append(this);
+    return TRUE;
 }
 
-void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& event)
+void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
 {
-  SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
-  Refresh();
+    SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
+    Refresh();
 }
 
 void wxDialog::Fit()
 {
+    wxWindow::Fit();
+}
+
+// Handle a close event from the window manager
+static void wxCloseDialogCallback( Widget WXUNUSED(widget), XtPointer client_data, 
+                                  XmAnyCallbackStruct *WXUNUSED(cbs))
+{
+    wxDialog *dialog = (wxDialog *)client_data;
+    wxCloseEvent closeEvent(wxEVT_CLOSE_WINDOW, dialog->GetId());
+    closeEvent.SetEventObject(dialog);
+    
+    // May delete the dialog (with delayed deletion)
+    dialog->GetEventHandler()->ProcessEvent(closeEvent);
+}
+
+void wxDialogBoxEventHandler (Widget    wid,
+                                     XtPointer WXUNUSED(client_data),
+                                     XEvent*   event,
+                                     Boolean *continueToDispatch)
+{
+    wxDialog *dialog = (wxDialog *)wxWidgetHashTable->Get((long)wid);
+    if (dialog)
+    {
+        wxMouseEvent wxevent(wxEVT_NULL);
+        if (wxTranslateMouseEvent(wxevent, dialog, wid, event))
+        {
+            wxevent.SetEventObject(dialog);
+            wxevent.SetId(dialog->GetId());
+            dialog->GetEventHandler()->ProcessEvent(wxevent);
+        }
+        else
+        {
+            // An attempt to implement OnCharHook by calling OnCharHook first;
+            // if this returns TRUE, set continueToDispatch to False
+            // (don't continue processing).
+            // Otherwise set it to True and call OnChar.
+            wxKeyEvent keyEvent(wxEVT_CHAR);
+            if (wxTranslateKeyEvent(keyEvent, dialog, wid, event))
+            {
+                keyEvent.SetEventObject(dialog);
+                keyEvent.SetId(dialog->GetId());
+                keyEvent.SetEventType(wxEVT_CHAR_HOOK);
+                if (dialog->GetEventHandler()->ProcessEvent(keyEvent))
+                {
+                    *continueToDispatch = False;
+                    return;
+                }
+                else
+                {
+                    // For simplicity, OnKeyDown is the same as OnChar
+                    // TODO: filter modifier key presses from OnChar
+                    keyEvent.SetEventType(wxEVT_KEY_DOWN);
+
+                    // Only process OnChar if OnKeyDown didn't swallow it
+                    if (!dialog->GetEventHandler()->ProcessEvent (keyEvent))
+                    {
+                        keyEvent.SetEventType(wxEVT_CHAR);
+                        dialog->GetEventHandler()->ProcessEvent(keyEvent);
+                   }
+                }
+            }
+        }
+    }
+    *continueToDispatch = True;
+}
+
+static void wxUnmapBulletinBoard(Widget WXUNUSED(dialog), wxDialog *WXUNUSED(client), XtPointer WXUNUSED(call) )
+{
+/* This gets called when the dialog is being shown, which
+* defeats modal showing.
+client->m_modalShowing = FALSE ;
+client->m_isShown = FALSE;
+    */
+}
+
+void wxDialog::ChangeFont(bool keepOriginalSize)
+{
+    wxWindow::ChangeFont(keepOriginalSize);
 }
+
+void wxDialog::ChangeBackgroundColour()
+{
+    if (GetMainWidget())
+        DoChangeBackgroundColour(GetMainWidget(), m_backgroundColour);
+}
+
+void wxDialog::ChangeForegroundColour()
+{
+    if (GetMainWidget())
+        DoChangeForegroundColour(GetMainWidget(), m_foregroundColour);
+}
+