102 lines
3.7 KiB
C++
102 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_SLIDESHOW_SOURCE_INC_SHAPEATTRIBUTELAYERHOLDER_HXX
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#define INCLUDED_SLIDESHOW_SOURCE_INC_SHAPEATTRIBUTELAYERHOLDER_HXX
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#include "attributableshape.hxx"
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#include "shapeattributelayer.hxx"
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namespace slideshow::internal
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{
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/** Holds a ShapeAttributeLayer, together with the associated
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Shape
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Use this class to hold ShapeAttributeLayer objects the
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RAII way. When this object gets deleted, it will
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automatically revoke the attribute layer for the given
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shape (this encapsulates the somewhat clumsy notification
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process that is required for shape and attribute layer
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interaction).
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*/
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class ShapeAttributeLayerHolder
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{
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public:
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/** Create a ShapeAttributeLayerHolder instance.
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This constructor creates an empty attribute holder, to
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generate an attribute layer, you have to manually call
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createAttributeLayer().
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*/
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ShapeAttributeLayerHolder() :
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mpShape(),
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mpAttributeLayer()
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{
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}
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~ShapeAttributeLayerHolder()
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{
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reset(); // ensures that the last attribute layer is
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// correctly deregistered from the shape.
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}
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ShapeAttributeLayerHolder(const ShapeAttributeLayerHolder&) = delete;
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ShapeAttributeLayerHolder& operator=(const ShapeAttributeLayerHolder&) = delete;
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void reset()
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{
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if( mpShape && mpAttributeLayer )
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mpShape->revokeAttributeLayer( mpAttributeLayer );
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}
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/** This constructor receives a pointer to the Shape, from
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which attribute layers should be generated. Initially,
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this object does not create an attribute layer, you
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have to manually call createAttributeLayer().
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@param rShape
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Shape for which attribute layers should be generated.
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*/
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bool createAttributeLayer( const AttributableShapeSharedPtr& rShape )
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{
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reset();
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mpShape = rShape;
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if( mpShape )
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mpAttributeLayer = mpShape->createAttributeLayer();
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return static_cast< bool >(mpAttributeLayer);
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}
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const ShapeAttributeLayerSharedPtr& get() const
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{
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return mpAttributeLayer;
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}
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private:
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AttributableShapeSharedPtr mpShape;
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ShapeAttributeLayerSharedPtr mpAttributeLayer;
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};
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}
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#endif // INCLUDED_SLIDESHOW_SOURCE_INC_SHAPEATTRIBUTELAYERHOLDER_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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