X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f2eb4ad2267c8dfd04288c0eb7be10ce1da240e6..9741fd45f734ea30e094f5b15f092b8394621204:/src/msw/listbox.cpp

diff --git a/src/msw/listbox.cpp b/src/msw/listbox.cpp
index b8255628c8..53d60ce89b 100644
--- a/src/msw/listbox.cpp
+++ b/src/msw/listbox.cpp
@@ -663,15 +663,11 @@ bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
             // item ourselves below in this case.
             n = SendMessage(GetHwnd(), LB_GETCARETINDEX, 0, 0);
         }
-        else
-        {
-            n = HitTest(ScreenToClient(wxGetMousePosition()));
-        }
+        //else: n will be determined below from the mouse position
     }
     else if ( param == LBN_DBLCLK )
     {
         evtType = wxEVT_COMMAND_LISTBOX_DOUBLECLICKED;
-        n = HitTest(ScreenToClient(wxGetMousePosition()));
     }
     else
     {
@@ -679,8 +675,38 @@ bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
         return false;
     }
 
-    // only send an event if we have a valid item
-    return n != wxNOT_FOUND && SendEvent(evtType, n, true /* selection */);
+    // Find the item position if it was a mouse-generated selection event or a
+    // double click event (which is always generated using the mouse)
+    if ( n == wxNOT_FOUND )
+    {
+        const DWORD pos = ::GetMessagePos();
+        const wxPoint pt(GET_X_LPARAM(pos), GET_Y_LPARAM(pos));
+        n = HitTest(ScreenToClient(wxPoint(pt)));
+    }
+
+    // We get events even when mouse is clicked outside of any valid item from
+    // Windows, just ignore them.
+    if ( n == wxNOT_FOUND )
+       return false;
+
+    // As we don't use m_oldSelections in single selection mode, we store the
+    // last item that we notified the user about in it in this case because we
+    // need to remember it to be able to filter out the dummy LBN_SELCHANGE
+    // messages that we get when the user clicks on an already selected item.
+    if ( param == LBN_SELCHANGE )
+    {
+        if ( !m_oldSelections.empty() && *m_oldSelections.begin() == n )
+        {
+            // Same item as the last time.
+            return false;
+        }
+
+        m_oldSelections.clear();
+        m_oldSelections.push_back(n);
+    }
+
+    // Do generate an event otherwise.
+    return SendEvent(evtType, n, true /* selection */);
 }
 
 WXLRESULT