Resolves: fdo#75982 set mnemonics targets for hidden labels

the key piece though is that labels that have mnemonic targets
are always candidates for getting mnemonics generated for them

Change-Id: Ie4bcbc18e94467936f40875c749cd22793021d0c

sc/uiconfig/scalc/ui/pivottablelayout.ui

@@ -536,8 +536,11 @@
             </child>
             <child>
               <object class="GtkLabel" id="page_text">
+                <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="label" translatable="yes">Page Fields</property>
+                <property name="use_underline">True</property>
+                <property name="mnemonic_widget">pagefield</property>
               </object>
               <packing>
                 <property name="expand">False</property>
@@ -547,8 +550,11 @@
             </child>
             <child>
               <object class="GtkLabel" id="column_text">
+                <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="label" translatable="yes">Column Fields</property>
+                <property name="use_underline">True</property>
+                <property name="mnemonic_widget">columnfield</property>
               </object>
               <packing>
                 <property name="expand">False</property>
@@ -558,8 +564,11 @@
             </child>
             <child>
               <object class="GtkLabel" id="row_text">
+                <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="label" translatable="yes">Row Fields</property>
+                <property name="use_underline">True</property>
+                <property name="mnemonic_widget">rowfield</property>
               </object>
               <packing>
                 <property name="expand">False</property>
@@ -569,8 +578,11 @@
             </child>
             <child>
               <object class="GtkLabel" id="data_text">
+                <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="label" translatable="yes">Data Fields</property>
+                <property name="use_underline">True</property>
+                <property name="mnemonic_widget">datafield</property>
               </object>
               <packing>
                 <property name="expand">False</property>
@@ -581,7 +593,10 @@
             <child>
               <object class="GtkLabel" id="select_text">
                 <property name="can_focus">False</property>
+                <property name="no_show_all">True</property>
                 <property name="label" translatable="yes">Selection area</property>
+                <property name="use_underline">True</property>
+                <property name="mnemonic_widget">buttonfield</property>
               </object>
               <packing>
                 <property name="expand">False</property>

vcl/source/window/dialog.cxx

@@ -87,6 +87,11 @@ static bool ImplIsMnemonicCtrl( Window* pWindow )
 
     if ( pWindow->GetType() == WINDOW_FIXEDTEXT )
     {
+        FixedText *pText = static_cast<FixedText*>(pWindow);
+        if (pText->get_mnemonic_widget())
+            return true;
+        //This is the legacy pre-layout logic which we retain
+        //until we can be sure we can remove it
         if ( pWindow->GetStyle() & (WB_INFO | WB_NOLABEL) )
             return false;
         Window* pNextWindow = pWindow->GetWindow( WINDOW_NEXT );