fixing modal dialog quit after nested message box problem

[wxWidgets.git] / src / common / dlgcmn.cpp

diff --git a/src/common/dlgcmn.cpp b/src/common/dlgcmn.cpp
index eb33b068ee633e469f911b93aedc7e3f17580b19..7c5ef85837fe54dc56af8784e64dd139f7adb567 100644 (file)
--- a/src/common/dlgcmn.cpp
+++ b/src/common/dlgcmn.cpp
@@ -40,9 +40,9 @@
 #include "wx/statline.h"
 #include "wx/sysopt.h"
 #include "wx/module.h"
-#include "wx/private/stattext.h"
 #include "wx/bookctrl.h"
 #include "wx/scrolwin.h"
+#include "wx/textwrapper.h"
 
 #if wxUSE_DISPLAY
 #include "wx/display.h"
@@ -78,32 +78,64 @@ void wxDialogBase::Init()
     SetExtraStyle(GetExtraStyle() | wxWS_EX_BLOCK_EVENTS);
 }
 
-// helper of GetParentForModalDialog()
-static bool CanBeUsedAsParent(wxWindow *parent)
+wxWindow *wxDialogBase::CheckIfCanBeUsedAsParent(wxWindow *parent) const
 {
+    if ( !parent )
+        return NULL;
+
     extern WXDLLIMPEXP_DATA_CORE(wxList) wxPendingDelete;
+    if ( wxPendingDelete.Member(parent) || parent->IsBeingDeleted() )
+    {
+        // this window is being deleted and we shouldn't create any children
+        // under it
+        return NULL;
+    }
+
+    if ( parent->HasExtraStyle(wxWS_EX_TRANSIENT) )
+    {
+        // this window is not being deleted yet but it's going to disappear
+        // soon so still don't parent this window under it
+        return NULL;
+    }
+
+    if ( !parent->IsShownOnScreen() )
+    {
+        // using hidden parent won't work correctly neither
+        return NULL;
+    }
+
+    // FIXME-VC6: this compiler requires an explicit const cast or it fails
+    //            with error C2446
+    if ( const_cast<const wxWindow *>(parent) == this )
+    {
+        // not sure if this can really happen but it doesn't hurt to guard
+        // against this clearly invalid situation
+        return NULL;
+    }
 
-    return !parent->HasExtraStyle(wxWS_EX_TRANSIENT) &&
-                parent->IsShownOnScreen() &&
-                    !wxPendingDelete.Member(parent) &&
-                        !parent->IsBeingDeleted();
+    return parent;
 }
 
 wxWindow *wxDialogBase::GetParentForModalDialog(wxWindow *parent) const
 {
     // creating a parent-less modal dialog will result (under e.g. wxGTK2)
-    // in an unfocused dialog, so try to find a valid parent for it:
+    // in an unfocused dialog, so try to find a valid parent for it unless we
+    // were explicitly asked not to
+    if ( HasFlag(wxDIALOG_NO_PARENT) )
+        return NULL;
+
+    // first try the given parent
     if ( parent )
-        parent = wxGetTopLevelParent(parent);
+        parent = CheckIfCanBeUsedAsParent(wxGetTopLevelParent(parent));
 
-    if ( !parent || !CanBeUsedAsParent(parent) )
-        parent = wxTheApp->GetTopWindow();
+    // then the currently active window
+    if ( !parent )
+        parent = CheckIfCanBeUsedAsParent(
+                    wxGetTopLevelParent(wxGetActiveWindow()));
 
-    if ( parent && !CanBeUsedAsParent(parent) )
-    {
-        // can't use this one, it's going to disappear
-        parent = NULL;
-    }
+    // and finally the application main window
+    if ( !parent )
+        parent = CheckIfCanBeUsedAsParent(wxTheApp->GetTopWindow());
 
     return parent;
 }
@@ -432,6 +464,42 @@ void wxDialogBase::OnButton(wxCommandEvent& event)
     }
 }
 
+// ----------------------------------------------------------------------------
+// compatibility methods for supporting the modality API 
+// ----------------------------------------------------------------------------
+
+wxDEFINE_EVENT( wxEVT_WINDOW_MODAL_DIALOG_CLOSED , wxWindowModalDialogEvent  );
+
+IMPLEMENT_DYNAMIC_CLASS(wxWindowModalDialogEvent, wxCommandEvent)
+
+bool wxDialogBase::ShowWindowModal ()
+{
+    ShowModal();
+    SendWindowModalDialogEvent ( wxEVT_WINDOW_MODAL_DIALOG_CLOSED  );
+    return true;
+}
+
+void wxDialogBase::SendWindowModalDialogEvent ( wxEventType type )
+{
+    wxCommandEvent event ( type, GetId());
+    event.SetEventObject(this);
+    
+    if ( !GetEventHandler()->ProcessEvent(event) )
+    {
+        // the event is not propagated upwards to the parent automatically
+        // because the dialog is a top level window, so do it manually as
+        // in 9 cases of 10 the message must be processed by the dialog
+        // owner and not the dialog itself
+        (void)GetParent()->GetEventHandler()->ProcessEvent(event);
+    }    
+}
+
+
+wxDialogModality wxDialogBase::GetModality() const
+{
+    return IsModal() ? wxDIALOG_MODALITY_APP_MODAL : wxDIALOG_MODALITY_NONE;
+}
+
 // ----------------------------------------------------------------------------
 // other event handlers
 // ----------------------------------------------------------------------------