summaryrefslogtreecommitdiffstats
path: root/slideshow/source/inc/shapeattributelayerholder.hxx
diff options
context:
space:
mode:
Diffstat (limited to 'slideshow/source/inc/shapeattributelayerholder.hxx')
-rw-r--r--slideshow/source/inc/shapeattributelayerholder.hxx102
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: */