diff options
Diffstat (limited to '')
-rw-r--r-- | slideshow/source/inc/shapeattributelayerholder.hxx | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/slideshow/source/inc/shapeattributelayerholder.hxx b/slideshow/source/inc/shapeattributelayerholder.hxx new file mode 100644 index 000000000..4c123b4e5 --- /dev/null +++ b/slideshow/source/inc/shapeattributelayerholder.hxx @@ -0,0 +1,102 @@ +/* -*- 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 . + */ + +#ifndef INCLUDED_SLIDESHOW_SOURCE_INC_SHAPEATTRIBUTELAYERHOLDER_HXX +#define INCLUDED_SLIDESHOW_SOURCE_INC_SHAPEATTRIBUTELAYERHOLDER_HXX + +#include "attributableshape.hxx" +#include "shapeattributelayer.hxx" + +namespace slideshow::internal + { + /** Holds a ShapeAttributeLayer, together with the associated + Shape + + Use this class to hold ShapeAttributeLayer objects the + RAII way. When this object gets deleted, it will + automatically revoke the attribute layer for the given + shape (this encapsulates the somewhat clumsy notification + process that is required for shape and attribute layer + interaction). + */ + class ShapeAttributeLayerHolder + { + public: + /** Create a ShapeAttributeLayerHolder instance. + + This constructor creates an empty attribute holder, to + generate an attribute layer, you have to manually call + createAttributeLayer(). + */ + ShapeAttributeLayerHolder() : + mpShape(), + mpAttributeLayer() + { + } + + ~ShapeAttributeLayerHolder() + { + reset(); // ensures that the last attribute layer is + // correctly deregistered from the shape. + } + + ShapeAttributeLayerHolder(const ShapeAttributeLayerHolder&) = delete; + ShapeAttributeLayerHolder& operator=(const ShapeAttributeLayerHolder&) = delete; + + void reset() + { + if( mpShape && mpAttributeLayer ) + mpShape->revokeAttributeLayer( mpAttributeLayer ); + } + + /** This constructor receives a pointer to the Shape, from + which attribute layers should be generated. Initially, + this object does not create an attribute layer, you + have to manually call createAttributeLayer(). + + @param rShape + Shape for which attribute layers should be generated. + */ + bool createAttributeLayer( const AttributableShapeSharedPtr& rShape ) + { + reset(); + + mpShape = rShape; + + if( mpShape ) + mpAttributeLayer = mpShape->createAttributeLayer(); + + return static_cast< bool >(mpAttributeLayer); + } + + const ShapeAttributeLayerSharedPtr& get() const + { + return mpAttributeLayer; + } + + private: + AttributableShapeSharedPtr mpShape; + ShapeAttributeLayerSharedPtr mpAttributeLayer; + }; + +} + +#endif // INCLUDED_SLIDESHOW_SOURCE_INC_SHAPEATTRIBUTELAYERHOLDER_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |