1*b1cdbd2cSJim Jagielski /************************************************************** 2*b1cdbd2cSJim Jagielski * 3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 5*b1cdbd2cSJim Jagielski * distributed with this work for additional information 6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 10*b1cdbd2cSJim Jagielski * 11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 12*b1cdbd2cSJim Jagielski * 13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 18*b1cdbd2cSJim Jagielski * under the License. 19*b1cdbd2cSJim Jagielski * 20*b1cdbd2cSJim Jagielski *************************************************************/ 21*b1cdbd2cSJim Jagielski 22*b1cdbd2cSJim Jagielski 23*b1cdbd2cSJim Jagielski 24*b1cdbd2cSJim Jagielski #ifndef INCLUDED_SLIDESHOW_SHAPEATTRIBUTELAYERHOLDER_HXX 25*b1cdbd2cSJim Jagielski #define INCLUDED_SLIDESHOW_SHAPEATTRIBUTELAYERHOLDER_HXX 26*b1cdbd2cSJim Jagielski 27*b1cdbd2cSJim Jagielski #include "attributableshape.hxx" 28*b1cdbd2cSJim Jagielski #include "shapeattributelayer.hxx" 29*b1cdbd2cSJim Jagielski 30*b1cdbd2cSJim Jagielski #include <boost/noncopyable.hpp> 31*b1cdbd2cSJim Jagielski 32*b1cdbd2cSJim Jagielski namespace slideshow 33*b1cdbd2cSJim Jagielski { 34*b1cdbd2cSJim Jagielski namespace internal 35*b1cdbd2cSJim Jagielski { 36*b1cdbd2cSJim Jagielski /** Holds a ShapeAttributeLayer, together with the associated 37*b1cdbd2cSJim Jagielski Shape 38*b1cdbd2cSJim Jagielski 39*b1cdbd2cSJim Jagielski Use this class to hold ShapeAttributeLayer objects the 40*b1cdbd2cSJim Jagielski RAII way. When this object gets deleted, it will 41*b1cdbd2cSJim Jagielski automatically revoke the attribute layer for the given 42*b1cdbd2cSJim Jagielski shape (this encapsulates the somewhat clumsy notification 43*b1cdbd2cSJim Jagielski process that is required for shape and attribute layer 44*b1cdbd2cSJim Jagielski interaction). 45*b1cdbd2cSJim Jagielski */ 46*b1cdbd2cSJim Jagielski class ShapeAttributeLayerHolder : private boost::noncopyable 47*b1cdbd2cSJim Jagielski { 48*b1cdbd2cSJim Jagielski public: 49*b1cdbd2cSJim Jagielski /** Create a ShapeAttributeLayerHolder instance. 50*b1cdbd2cSJim Jagielski 51*b1cdbd2cSJim Jagielski This constructor creates an empty attribute holder, to 52*b1cdbd2cSJim Jagielski generate an attribute layer, you have to manually call 53*b1cdbd2cSJim Jagielski createAttributeLayer(). 54*b1cdbd2cSJim Jagielski */ ShapeAttributeLayerHolder()55*b1cdbd2cSJim Jagielski ShapeAttributeLayerHolder() : 56*b1cdbd2cSJim Jagielski mpShape(), 57*b1cdbd2cSJim Jagielski mpAttributeLayer() 58*b1cdbd2cSJim Jagielski { 59*b1cdbd2cSJim Jagielski } 60*b1cdbd2cSJim Jagielski ~ShapeAttributeLayerHolder()61*b1cdbd2cSJim Jagielski ~ShapeAttributeLayerHolder() 62*b1cdbd2cSJim Jagielski { 63*b1cdbd2cSJim Jagielski reset(); // ensures that the last attribute layer is 64*b1cdbd2cSJim Jagielski // correctly deregistered from the shape. 65*b1cdbd2cSJim Jagielski } 66*b1cdbd2cSJim Jagielski reset()67*b1cdbd2cSJim Jagielski void reset() 68*b1cdbd2cSJim Jagielski { 69*b1cdbd2cSJim Jagielski if( mpShape && mpAttributeLayer ) 70*b1cdbd2cSJim Jagielski mpShape->revokeAttributeLayer( mpAttributeLayer ); 71*b1cdbd2cSJim Jagielski } 72*b1cdbd2cSJim Jagielski 73*b1cdbd2cSJim Jagielski /** This constructor receives a pointer to the Shape, from 74*b1cdbd2cSJim Jagielski which attribute layers should be generated. Initially, 75*b1cdbd2cSJim Jagielski this object does not create an attribute layer, you 76*b1cdbd2cSJim Jagielski have to manually call createAttributeLayer(). 77*b1cdbd2cSJim Jagielski 78*b1cdbd2cSJim Jagielski @param rShape 79*b1cdbd2cSJim Jagielski Shape for which attribute layers should be generated. 80*b1cdbd2cSJim Jagielski */ createAttributeLayer(const AttributableShapeSharedPtr & rShape)81*b1cdbd2cSJim Jagielski bool createAttributeLayer( const AttributableShapeSharedPtr& rShape ) 82*b1cdbd2cSJim Jagielski { 83*b1cdbd2cSJim Jagielski reset(); 84*b1cdbd2cSJim Jagielski 85*b1cdbd2cSJim Jagielski mpShape = rShape; 86*b1cdbd2cSJim Jagielski 87*b1cdbd2cSJim Jagielski if( mpShape ) 88*b1cdbd2cSJim Jagielski mpAttributeLayer = mpShape->createAttributeLayer(); 89*b1cdbd2cSJim Jagielski 90*b1cdbd2cSJim Jagielski return (mpAttributeLayer.get() != NULL); 91*b1cdbd2cSJim Jagielski } 92*b1cdbd2cSJim Jagielski get() const93*b1cdbd2cSJim Jagielski ShapeAttributeLayerSharedPtr get() const 94*b1cdbd2cSJim Jagielski { 95*b1cdbd2cSJim Jagielski return mpAttributeLayer; 96*b1cdbd2cSJim Jagielski } 97*b1cdbd2cSJim Jagielski 98*b1cdbd2cSJim Jagielski private: 99*b1cdbd2cSJim Jagielski AttributableShapeSharedPtr mpShape; 100*b1cdbd2cSJim Jagielski ShapeAttributeLayerSharedPtr mpAttributeLayer; 101*b1cdbd2cSJim Jagielski }; 102*b1cdbd2cSJim Jagielski 103*b1cdbd2cSJim Jagielski } 104*b1cdbd2cSJim Jagielski } 105*b1cdbd2cSJim Jagielski 106*b1cdbd2cSJim Jagielski #endif /* INCLUDED_SLIDESHOW_SHAPEATTRIBUTELAYERHOLDER_HXX */ 107