don't clear the list control when wxLC_[HV]RULES style is toggled (#4688)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54201 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/generic/listctrl.cpp b/src/generic/listctrl.cpp
index 985fa5d7e980149185d925fe42e357f464c84d63..8c40c96c4831b094aebe2ed65bd45a3fbbb46bb3 100644 (file)
--- a/src/generic/listctrl.cpp
+++ b/src/generic/listctrl.cpp
@@ -5088,7 +5088,17 @@ void wxGenericListCtrl::SetSingleStyle( long style, bool add )
     else
         flag &= ~style;
 
-    SetWindowStyleFlag( flag );
+    // some styles can be set without recreating everything (as happens in
+    // SetWindowStyleFlag() which calls wxListMainWindow::DeleteEverything())
+    if ( !(style & ~(wxLC_HRULES | wxLC_VRULES)) )
+    {
+        Refresh();
+        wxWindow::SetWindowStyleFlag(flag);
+    }
+    else
+    {
+        SetWindowStyleFlag( flag );
+    }
 }
 
 void wxGenericListCtrl::SetWindowStyleFlag( long flag )