X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/049908c57372c671516be6f1a853d35761327e81..edd6813c826edc2311548da53eb83e7f1bc18d2b:/src/common/toplvcmn.cpp

diff --git a/src/common/toplvcmn.cpp b/src/common/toplvcmn.cpp
index 77cbec0582..bcfd529105 100644
--- a/src/common/toplvcmn.cpp
+++ b/src/common/toplvcmn.cpp
@@ -59,7 +59,7 @@ wxTopLevelWindowBase::wxTopLevelWindowBase()
 {
     // Unlike windows, top level windows are created hidden by default.
     m_isShown = false;
-    m_winDefault = NULL;
+    m_winDefault =
     m_winTmpDefault = NULL;
 
     WX_INIT_CONTROL_CONTAINER();
@@ -67,7 +67,8 @@ wxTopLevelWindowBase::wxTopLevelWindowBase()
 
 wxTopLevelWindowBase::~wxTopLevelWindowBase()
 {
-    m_winDefault = m_winTmpDefault = NULL;
+    m_winDefault =
+    m_winTmpDefault = NULL;
 
     // don't let wxTheApp keep any stale pointers to us
     if ( wxTheApp && wxTheApp->GetTopWindow() == this )
@@ -75,6 +76,34 @@ wxTopLevelWindowBase::~wxTopLevelWindowBase()
 
     wxTopLevelWindows.DeleteObject(this);
 
+    // delete any our top level children which are still pending for deletion
+    // immediately: this could happen if a child (e.g. a temporary dialog
+    // created with this window as parent) was Destroy()'d) while this window
+    // was deleted directly (with delete, or maybe just because it was created
+    // on the stack) immediately afterwards and before the child TLW was really
+    // destroyed -- not destroying it now would leave it alive with a dangling
+    // parent pointer and result in a crash later
+    for ( wxObjectList::iterator i = wxPendingDelete.begin();
+          i != wxPendingDelete.end();
+          )
+    {
+        wxWindow * const win = wxDynamicCast(*i, wxWindow);
+        if ( win && win->GetParent() == this )
+        {
+            wxPendingDelete.erase(i);
+
+            delete win;
+
+            // deleting it invalidated the list (and not only one node because
+            // it could have resulted in deletion of other objects to)
+            i = wxPendingDelete.begin();
+        }
+        else
+        {
+            ++i;
+        }
+    }
+
     if ( IsLastBeforeExit() )
     {
         // no other (important) windows left, quit the app
@@ -89,15 +118,26 @@ bool wxTopLevelWindowBase::Destroy()
     if ( !wxPendingDelete.Member(this) )
         wxPendingDelete.Append(this);
 
-    if (wxTopLevelWindows.GetCount() > 1)
+    // normally we want to hide the window immediately so that it doesn't get
+    // stuck on the screen while it's being destroyed, however we shouldn't
+    // hide the last visible window as then we might not get any idle events
+    // any more as no events will be sent to the hidden window and without idle
+    // events we won't prune wxPendingDelete list and the application won't
+    // terminate
+    for ( wxWindowList::const_iterator i = wxTopLevelWindows.begin(),
+                                     end = wxTopLevelWindows.end();
+          i != end;
+          ++i )
     {
-        // Hide it immediately. This should
-        // not be done if this TLW is the
-        // only one left since we then would
-        // risk not to get any idle events
-        // at all anymore during which we
-        // could delete any pending events.
-        Hide();
+        wxTopLevelWindow * const win = wx_static_cast(wxTopLevelWindow *, *i);
+        if ( win != this && win->IsShown() )
+        {
+            // there remains at least one other visible TLW, we can hide this
+            // one
+            Hide();
+
+            break;
+        }
     }
 
     return true;