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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #ifndef INCLUDED_SLIDESHOW_ATTRIBUTABLESHAPE_HXX
21 : #define INCLUDED_SLIDESHOW_ATTRIBUTABLESHAPE_HXX
22 :
23 : #include <boost/shared_ptr.hpp>
24 :
25 : #include "animatableshape.hxx"
26 : #include "shapeattributelayer.hxx"
27 : #include "doctreenodesupplier.hxx"
28 :
29 : namespace slideshow
30 : {
31 : namespace internal
32 : {
33 : // forward declaration necessary, because methods use AttributableShapeSharedPtr
34 : class AttributableShape;
35 :
36 : typedef ::boost::shared_ptr< AttributableShape > AttributableShapeSharedPtr;
37 :
38 : /** Represents an animatable shape, that can have its
39 : attributes changed.
40 :
41 : Over an animatable shape, this interface adds attribute
42 : modification methods. Furthermore, the shape can be
43 : queried for sub items, which in turn can be separated out
44 : into own AttributableShapes.
45 : */
46 0 : class AttributableShape : public AnimatableShape
47 : {
48 : public:
49 : // Attribute layer methods
50 :
51 :
52 : /** Create a new shape attribute layer.
53 :
54 : This method creates a new layer for shape attributes,
55 : which lies atop of all previous attribute layers. That
56 : is most typically used when a new SMIL animation
57 : starts (which according to the spec always lies atop
58 : of all previous animations). Thus, subsequent calls to
59 : this method generate a sandwich of attribute layers,
60 : which in total define the shape's attributes.
61 :
62 : Please note that the attribute layers do <em>not</em>
63 : contain the underlying XShape's attributes as
64 : default. Instead, attributes not explicitly set by
65 : animations remain in invalid state, allowing the
66 : shape's paint method to determine whether they have to
67 : override the underlying graphical shape
68 : representation. XShape attributes must be passed
69 : explicitly to animations which need them (e.g. 'by'
70 : animations).
71 :
72 : @return the new layer
73 : */
74 : virtual ShapeAttributeLayerSharedPtr createAttributeLayer() = 0;
75 :
76 : /** Revoke a previously generated attribute layer.
77 :
78 : This method revokes a previously generated attribute
79 : layer, and removes the effect of that layer from this
80 : shape. The layer need not be the current toplevel
81 : layer, it can also be revoked from in between.
82 :
83 : @param rLayer
84 : Layer to revoke. Must have been generated by
85 : createAttributeLayer() at the same Shape.
86 :
87 : @return true, if layer was successfully removed, false
88 : otherwise (e.g. if the given layer was not generated
89 : for this shape).
90 : */
91 : virtual bool revokeAttributeLayer( const ShapeAttributeLayerSharedPtr& rLayer ) = 0;
92 :
93 : /** Get the topmost shape attribute layer (if any).
94 :
95 : This method returns the topmost layer for shape
96 : attributes, i.e. the one which ultimately determines
97 : the shape's look.
98 :
99 : Please note that the attribute layers do <em>not</em>
100 : contain the underlying XShape's attributes as
101 : default. Instead, attributes not explicitly set by
102 : animations remain in invalid state, allowing the
103 : shape's paint method to determine whether they have to
104 : override the underlying graphical shape
105 : representation. XShape attributes must be passed
106 : explicitly to animations which need them (e.g. 'by'
107 : animations).
108 :
109 : @return the topmost layer
110 : */
111 : virtual ShapeAttributeLayerSharedPtr getTopmostAttributeLayer() const = 0;
112 :
113 :
114 : /** Change default shape visibility
115 :
116 : This method hides or unhides a shape. Note that every
117 : attribute layer generated for this shape is able to
118 : override the setting given here, until it is revoked.
119 :
120 : @param bVisible
121 : When true, shape will be visible, when false,
122 : invisible (modulo attribute layer overrides).
123 : */
124 : virtual void setVisibility( bool bVisible ) = 0;
125 :
126 : // Sub-item handling
127 :
128 :
129 : /** Retrieve interface for DocTreeNode creation.
130 :
131 : This method provides the caller with a reference to
132 : the DocTreeNodeSupplier interface, which can be used
133 : to request specific tree nodes for this shape.
134 : */
135 : virtual const DocTreeNodeSupplier& getTreeNodeSupplier() const = 0;
136 : virtual DocTreeNodeSupplier& getTreeNodeSupplier() = 0;
137 :
138 : /** Query the subset this shape displays.
139 :
140 : This method returns a tree node denoting the subset
141 : displayed by this shape. If this shape is not a subset
142 : shape, an empty tree node should be returned. If this
143 : shape is a subset, and itself has subsetted children,
144 : this method might return more than the shape is
145 : actually displaying (because a single DocTreeNode is
146 : not able to model holes in the range).
147 : */
148 : virtual DocTreeNode getSubsetNode() const = 0;
149 :
150 : /** Query a subset Shape, if already existent at this
151 : object
152 :
153 : This method returns a clone of this Shape, which
154 : renders only the selected subset of itself, but only
155 : if such a subset has been explicitly created before.
156 :
157 : @param rTreeNode
158 : A DocTreeNode instance queried from this Shape, which
159 : specifies the subset of the Shape to render.
160 :
161 : @return a NULL Shape pointer, if no subset exists for
162 : the given DocTreeNode.
163 : */
164 : virtual AttributableShapeSharedPtr getSubset( const DocTreeNode& rTreeNode ) const = 0;
165 :
166 : /** Create a subset Shape
167 :
168 : This method creates a clone of this Shape, which
169 : renders only the selected subset of itself. Multiple
170 : createSubset() calls for the same DocTreeNode will all
171 : share the same subset shape.
172 :
173 : The original shape (i.e. the one this method is called
174 : on) will cease to display the selected subset
175 : part. That is, together the shapes will display the
176 : original content, but the content of all subset shapes
177 : and their original shape will always be mutually
178 : disjunct.
179 :
180 : After deregistering the subset shape a matching number
181 : of times via revokeSubset(), the original shape will
182 : resume displaying the subsetted part.
183 :
184 : @attention To maintain view integrity, this method
185 : should only be called from the LayerManager
186 :
187 : @param o_rSubset
188 : The requested Shape
189 :
190 : @param rTreeNode
191 : A DocTreeNode instance queried from this Shape, which
192 : specifies the subset of the Shape to render
193 :
194 : @return true, if the shape was newly created, and
195 : false, if an already existing subset is returned.
196 : */
197 : virtual bool createSubset( AttributableShapeSharedPtr& o_rSubset,
198 : const DocTreeNode& rTreeNode ) = 0;
199 :
200 : /** Revoke a previously generated shape subset.
201 :
202 : After revoking a subset shape, the corresponding
203 : subset part will become visible again on the original
204 : shape.
205 :
206 : @attention To maintain view integrity, this method
207 : should only be called from the LayerManager
208 :
209 : @param rShape
210 : The subset to revoke
211 :
212 : @return true, if the last client called
213 : revokeSubset().
214 : */
215 : virtual bool revokeSubset( const AttributableShapeSharedPtr& rShape ) = 0;
216 : };
217 : }
218 : }
219 :
220 : #endif /* INCLUDED_SLIDESHOW_ATTRIBUTABLESHAPE_HXX */
221 :
222 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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