wxMessageBox off the main thread lost result code.

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

diff --git a/src/common/docview.cpp b/src/common/docview.cpp
index 468016ec2dee70aa06896f7a15a40c6672f4e7b2..b646d9efe21b1a88b6b21df89d8e432b384906c2 100644 (file)
--- a/src/common/docview.cpp
+++ b/src/common/docview.cpp
@@ -4,7 +4,6 @@
 // Author:      Julian Smart
 // Modified by: Vadim Zeitlin
 // Created:     01/02/97
-// RCS-ID:      $Id$
 // Copyright:   (c) Julian Smart
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
@@ -858,19 +857,25 @@ wxDocument *wxDocTemplate::CreateDocument(const wxString& path, long flags)
 bool
 wxDocTemplate::InitDocument(wxDocument* doc, const wxString& path, long flags)
 {
-    wxScopeGuard g = wxMakeObjGuard(*doc, &wxDocument::DeleteAllViews);
-
-    doc->SetFilename(path);
-    doc->SetDocumentTemplate(this);
-    GetDocumentManager()->AddDocument(doc);
-    doc->SetCommandProcessor(doc->OnCreateCommandProcessor());
-
-    if ( !doc->OnCreate(path, flags) )
-        return false;
-
-    g.Dismiss(); // no need to call DeleteAllViews() anymore
+    // Normally, if wxDocument::OnCreate() fails, it happens because the view
+    // initialization fails and then the document is destroyed due to the
+    // destruction of its last view. But take into account the (currently
+    // unrealized, AFAICS) possibility of other failures as well and ensure
+    // that the document is always destroyed if it can't be initialized.
+    wxTRY
+    {
+        doc->SetFilename(path);
+        doc->SetDocumentTemplate(this);
+        GetDocumentManager()->AddDocument(doc);
+        doc->SetCommandProcessor(doc->OnCreateCommandProcessor());
 
-    return true;
+        return doc->OnCreate(path, flags);
+    }
+    wxCATCH_ALL(
+        if ( GetDocumentManager()->GetDocuments().Member(doc) )
+            doc->DeleteAllViews();
+        throw;
+    )
 }
 
 wxView *wxDocTemplate::CreateView(wxDocument *doc, long flags)
@@ -1506,7 +1511,6 @@ wxDocument *wxDocManager::CreateDocument(const wxString& pathOrig, long flags)
         return NULL;
 
     docNew->SetDocumentName(temp->GetDocumentName());
-    docNew->SetDocumentTemplate(temp);
 
     wxTRY
     {
@@ -2014,6 +2018,31 @@ void wxDocManager::ActivateView(wxView *view, bool activate)
 // wxDocChildFrameAnyBase
 // ----------------------------------------------------------------------------
 
+bool wxDocChildFrameAnyBase::TryProcessEvent(wxEvent& event)
+{
+    if ( !m_childView )
+    {
+        // We must be being destroyed, don't forward events anywhere as
+        // m_childDocument could be invalid by now.
+        return false;
+    }
+
+    // Store a (non-owning) pointer to the last processed event here to be able
+    // to recognize this event again if it bubbles up to the parent frame, see
+    // the code in wxDocParentFrameAnyBase::TryProcessEvent().
+    m_lastEvent = &event;
+
+    // Forward the event to the document manager which will, in turn, forward
+    // it to its active view which must be our m_childView.
+    //
+    // Notice that we do things in this roundabout way to guarantee the correct
+    // event handlers call order: first the document, then the view and then the
+    // document manager itself. And if we forwarded the event directly to the
+    // view, then the document manager would do it once again when we forwarded
+    // it to it.
+    return m_childDocument->GetDocumentManager()->ProcessEventLocally(event);
+}
+
 bool wxDocChildFrameAnyBase::CloseView(wxCloseEvent& event)
 {
     if ( m_childView )
@@ -2046,6 +2075,29 @@ bool wxDocChildFrameAnyBase::CloseView(wxCloseEvent& event)
 // wxDocParentFrameAnyBase
 // ----------------------------------------------------------------------------
 
+bool wxDocParentFrameAnyBase::TryProcessEvent(wxEvent& event)
+{
+    if ( !m_docManager )
+        return false;
+
+    // If we have an active view, its associated child frame may have
+    // already forwarded the event to wxDocManager, check for this:
+    if ( wxView* const view = m_docManager->GetAnyUsableView() )
+    {
+        wxDocChildFrameAnyBase* const childFrame = view->GetDocChildFrame();
+        if ( childFrame && childFrame->HasAlreadyProcessed(event) )
+            return false;
+    }
+
+    // But forward the event to wxDocManager ourselves if there are no views at
+    // all or if this event hadn't been sent to the child frame previously.
+    return m_docManager->ProcessEventLocally(event);
+}
+
+// ----------------------------------------------------------------------------
+// Printing support
+// ----------------------------------------------------------------------------
+
 #if wxUSE_PRINTING_ARCHITECTURE
 
 namespace