loplugin:useuniqueptr in SvTreeListBox

Change-Id: Ib5b4cb667e8c7979ba03a680af7923f9caf9dfc3
Reviewed-on: https://gerrit.libreoffice.org/53593Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

include/svtools/treelistbox.hxx

@@ -291,7 +291,7 @@ protected:
     virtual sal_uLong Insert( SvTreeListEntry* pEntry,sal_uLong nRootPos = TREELIST_APPEND );
 
     // In-place editing
-    SvInplaceEdit2*  pEdCtrl;
+    std::unique_ptr<SvInplaceEdit2>  pEdCtrl;
     void            EditText( const OUString&, const tools::Rectangle&,const Selection&);
     void            CancelTextEditing();
     bool            EditingCanceled() const;

svtools/source/contnr/treelistbox.cxx

@@ -352,7 +352,6 @@ SvTreeListBox::SvTreeListBox(vcl::Window* pParent, WinBits nWinStyle) :
     pModel->SetCloneLink( LINK(this, SvTreeListBox, CloneHdl_Impl ));
     pModel->InsertView( this );
     pHdlEntry = nullptr;
-    pEdCtrl = nullptr;
     eSelMode = SelectionMode::Single;
     nDragDropMode = DragDropMode::NONE;
     SetType(WindowType::TREELISTBOX);
@@ -885,14 +884,14 @@ void SvTreeListBox::EnableSelectionAsDropTarget( bool bEnable )
 void SvTreeListBox::EditText( const OUString& rStr, const tools::Rectangle& rRect,
     const Selection& rSel )
 {
-    delete pEdCtrl;
+    pEdCtrl.reset();
     nImpFlags |= SvTreeListBoxFlags::IN_EDT;
     nImpFlags &= ~SvTreeListBoxFlags::EDTEND_CALLED;
     HideFocus();
-    pEdCtrl = new SvInplaceEdit2(
+    pEdCtrl.reset( new SvInplaceEdit2(
         this, rRect.TopLeft(), rRect.GetSize(), rStr,
         LINK( this, SvTreeListBox, TextEditEndedHdl_Impl ),
-        rSel );
+        rSel ) );
 }
 
 IMPL_LINK_NOARG(SvTreeListBox, TextEditEndedHdl_Impl, SvInplaceEdit2&, void)
@@ -1363,8 +1362,7 @@ void SvTreeListBox::dispose()
     {
         ClearTabList();
 
-        delete pEdCtrl;
-        pEdCtrl = nullptr;
+        pEdCtrl.reset();
 
         if( pModel )
         {
@@ -2033,8 +2031,7 @@ void SvTreeListBox::LoseFocus()
 void SvTreeListBox::ModelHasCleared()
 {
     pImpl->pCursor = nullptr; // else we crash in GetFocus when editing in-place
-    delete pEdCtrl;
-    pEdCtrl = nullptr;
+    pEdCtrl.reset();
     pImpl->Clear();
     nFocusWidth = -1;