All: Fix crash on close Kicad, when a quasi modal dialog is open, and Kicad is closed from the Kicad project manager.

common/basicframe.cpp

@@ -44,6 +44,7 @@
 #include <wxstruct.h>
 #include <macros.h>
 #include <menus_helpers.h>
+#include <dialog_shim.h>
 
 #include <boost/version.hpp>
 #include <typeinfo>
@@ -107,6 +108,39 @@ EDA_BASE_FRAME::EDA_BASE_FRAME( wxWindow* aParent, FRAME_T aFrameType,
 
 void EDA_BASE_FRAME::windowClosing( wxCloseEvent& event )
 {
+    DIALOG_SHIM* dlg  = NULL;
+    wxWindowList list = GetChildren();
+
+    // Quasi modal dialogs create issues (crashes) when closing Kicad.
+    // I am guessing they are delete too late, when deleting main frames.
+    // AFAIK, only these DIALOG_SHIM dialogs create such issues.
+    // The policy is do not allow closing Kicad if a Quasi modal dialog is open.
+    // (Anyway, closing without prompting the user is certainly bad,
+    // because an edit is in preogress)
+    // Therefore, iterate through the child list to find at least
+    // a DIALOG_SHIM opened in quasi modal mode
+    for( wxWindowList::iterator iter = list.begin(); iter != list.end(); ++iter )
+    {
+        if( (dlg = dynamic_cast<DIALOG_SHIM*> (*iter) ) != NULL )
+        {
+            if( dlg->IsQuasiModal() )
+                break;
+            else
+                dlg = NULL;
+        }
+    }
+
+    if( dlg )
+    {
+        // Happens when a quasi modal dialog is currently open.
+        // For example: if the Kicad manager try to close Kicad.
+        wxMessageBox( _(
+                "The program cannot be closed\n"
+                "A quasi-modal dialog window is currently open, please close it first." ) );
+        event.Veto();
+        return;
+    }
+
     wxConfigBase* cfg = config();
 
     if( cfg )

eeschema/schframe.cpp

@@ -617,7 +617,7 @@ void SCH_EDIT_FRAME::OnCloseWindow( wxCloseEvent& aEvent )
         }
     }
 
-    // Close the find dialog and perserve it's setting if it is displayed.
+    // Close the find dialog and preserve it's setting if it is displayed.
     if( m_dlgFindReplace )
     {
         m_findDialogPosition = m_dlgFindReplace->GetPosition();

include/wxstruct.h

@@ -107,7 +107,7 @@ class EDA_BASE_FRAME : public wxFrame
      * SaveSettings().  SaveSettings() is called for all derived wxFrames in this
      * base class overload.  (Calling it from a destructor is deprecated since the
      * wxFrame's position is not available in the destructor on linux.)  In other words,
-     * you should not need to call call SaveSettings() anywhere, except in this
+     * you should not need to call SaveSettings() anywhere, except in this
      * one function found only in this class.
      */
     void windowClosing( wxCloseEvent& event );