add a VclFrame::get_label

Change-Id: I1fd7dd198345167e587353d370a0ef055221962f

include/vcl/layout.hxx

@@ -463,6 +463,7 @@ public:
     {
     }
     void set_label(const OUString &rLabel);
+    OUString get_label() const;
     virtual Window *get_child();
     virtual const Window *get_child() const;
     Window *get_label_widget();

vcl/source/window/layout.cxx

@@ -1323,6 +1323,13 @@ void VclFrame::set_label(const OUString &rLabel)
     pLabel->SetText(rLabel);
 }
 
+OUString VclFrame::get_label() const
+{
+    const Window *pLabel = get_label_widget();
+    assert(pLabel);
+    return pLabel->GetText();
+}
+
 OUString VclFrame::getDefaultAccessibleName() const
 {
     const Window *pLabel = get_label_widget();