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diff --git a/svx/source/stbctrls/modctrl.cxx b/svx/source/stbctrls/modctrl.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <vcl/status.hxx>
+#include <vcl/image.hxx>
+#include <vcl/timer.hxx>
+#include <vcl/idle.hxx>
+#include <vcl/event.hxx>
+#include <svl/eitem.hxx>
+#include <tools/debug.hxx>
+
+#include <svx/strings.hrc>
+#include <svx/modctrl.hxx>
+#include <svx/dialmgr.hxx>
+
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include "modctrl_internal.hxx"
+#include <bitmaps.hlst>
+
+using ::com::sun::star::uno::Sequence;
+using ::com::sun::star::beans::PropertyValue;
+
+SFX_IMPL_STATUSBAR_CONTROL(SvxModifyControl, SfxBoolItem);
+
+struct SvxModifyControl::ImplData
+{
+ enum ModificationState
+ {
+ MODIFICATION_STATE_NO = 0,
+ MODIFICATION_STATE_YES,
+ MODIFICATION_STATE_FEEDBACK,
+ MODIFICATION_STATE_SIZE
+ };
+
+ Idle maIdle { "svx::SvxModifyControl maIdle" };
+ Image maImages[MODIFICATION_STATE_SIZE];
+
+ ModificationState mnModState;
+
+ ImplData():
+ mnModState(MODIFICATION_STATE_NO)
+ {
+ maImages[MODIFICATION_STATE_NO] = Image(StockImage::Yes, RID_SVXBMP_DOC_MODIFIED_NO);
+ maImages[MODIFICATION_STATE_YES] = Image(StockImage::Yes, RID_SVXBMP_DOC_MODIFIED_YES);
+ maImages[MODIFICATION_STATE_FEEDBACK] = Image(StockImage::Yes, RID_SVXBMP_DOC_MODIFIED_FEEDBACK);
+
+ maIdle.SetPriority(TaskPriority::LOWEST);
+ }
+};
+
+SvxModifyControl::SvxModifyControl( sal_uInt16 _nSlotId, sal_uInt16 _nId, StatusBar& rStb ) :
+ SfxStatusBarControl( _nSlotId, _nId, rStb ),
+ mxImpl(std::make_shared<ImplData>())
+{
+ mxImpl->maIdle.SetInvokeHandler( LINK(this, SvxModifyControl, OnTimer) );
+}
+
+
+void SvxModifyControl::StateChangedAtStatusBarControl( sal_uInt16, SfxItemState eState,
+ const SfxPoolItem* pState )
+{
+ if ( SfxItemState::DEFAULT != eState )
+ return;
+
+ DBG_ASSERT( dynamic_cast<const SfxBoolItem*>( pState) != nullptr, "invalid item type" );
+ const SfxBoolItem* pItem = static_cast<const SfxBoolItem*>(pState);
+ mxImpl->maIdle.Stop();
+
+ bool modified = pItem->GetValue();
+ bool start = ( !modified && mxImpl->mnModState == ImplData::MODIFICATION_STATE_YES); // should timer be started and feedback image displayed ?
+
+ mxImpl->mnModState = (start ? ImplData::MODIFICATION_STATE_FEEDBACK : (modified ? ImplData::MODIFICATION_STATE_YES : ImplData::MODIFICATION_STATE_NO));
+
+ _repaint();
+
+ TranslateId pResId = modified ? RID_SVXSTR_DOC_MODIFIED_YES : RID_SVXSTR_DOC_MODIFIED_NO;
+ GetStatusBar().SetQuickHelpText(GetId(), SvxResId(pResId));
+
+ if ( start )
+ mxImpl->maIdle.Start();
+}
+
+
+IMPL_LINK( SvxModifyControl, OnTimer, Timer *, pTimer, void )
+{
+ if (pTimer == nullptr)
+ return;
+
+ pTimer->Stop();
+ mxImpl->mnModState = ImplData::MODIFICATION_STATE_NO;
+
+ _repaint();
+}
+
+
+void SvxModifyControl::_repaint()
+{
+ GetStatusBar().SetItemData( GetId(), nullptr ); // force repaint
+}
+
+/**
+ * Given a bounding rectangle and an image, determine the top-left position
+ * of the image so that the image would look centered both horizontally and
+ * vertically.
+ *
+ * @param rBoundingRect bounding rectangle
+ * @param rImg image
+ *
+ * @return Point top-left corner of the centered image position
+ */
+Point centerImage(const tools::Rectangle& rBoundingRect, const Image& rImg)
+{
+ Size aImgSize = rImg.GetSizePixel();
+ Size aRectSize = rBoundingRect.GetSize();
+ tools::Long nXOffset = (aRectSize.getWidth() - aImgSize.getWidth())/2;
+ tools::Long nYOffset = (aRectSize.getHeight() - aImgSize.getHeight())/2;
+ Point aPt = rBoundingRect.TopLeft();
+ aPt += Point(nXOffset, nYOffset);
+ return aPt;
+}
+
+void SvxModifyControl::Paint( const UserDrawEvent& rUsrEvt )
+{
+ vcl::RenderContext* pDev = rUsrEvt.GetRenderContext();
+ tools::Rectangle aRect(rUsrEvt.GetRect());
+
+ ImplData::ModificationState state = mxImpl->mnModState;
+ Point aPt = centerImage(aRect, mxImpl->maImages[state]);
+ pDev->DrawImage(aPt, mxImpl->maImages[state]);
+}
+
+void SvxModifyControl::Click()
+{
+ if (mxImpl->mnModState != ImplData::MODIFICATION_STATE_YES)
+ // document not modified. nothing to do here.
+ return;
+
+ Sequence<PropertyValue> aArgs;
+ execute(".uno:Save", aArgs);
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */