1 // A group of 2D Canvas elements
3 // Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
5 // This library is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU Library General Public
7 // License as published by the Free Software Foundation; either
8 // version 2 of the License, or (at your option) any later version.
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // Library General Public License for more details.
15 // You should have received a copy of the GNU Library General Public
16 // License along with this library; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 #include "CanvasGroup.hxx"
20 #include "CanvasImage.hxx"
21 #include "CanvasMap.hxx"
22 #include "CanvasPath.hxx"
23 #include "CanvasText.hxx"
25 #include <boost/bind.hpp>
26 #include <boost/foreach.hpp>
27 #include <boost/lambda/core.hpp>
34 * Create an canvas Element of type T
37 ElementPtr createElement( const CanvasWeakPtr& canvas,
38 const SGPropertyNode_ptr& node,
41 return ElementPtr( new T(canvas, node, style) );
44 //----------------------------------------------------------------------------
45 Group::Group( const CanvasWeakPtr& canvas,
46 const SGPropertyNode_ptr& node,
47 const Style& parent_style ):
48 Element(canvas, node, parent_style)
50 _child_factories["group"] = &createElement<Group>;
51 _child_factories["image"] = &createElement<Image>;
52 _child_factories["map" ] = &createElement<Map >;
53 _child_factories["path" ] = &createElement<Path >;
54 _child_factories["text" ] = &createElement<Text >;
57 //----------------------------------------------------------------------------
63 //----------------------------------------------------------------------------
64 ElementPtr Group::createChild( const std::string& type,
65 const std::string& name )
67 SGPropertyNode* node = _node->addChild(type, 0, false);
69 node->setStringValue("name", name);
71 return getChild(node);
74 //----------------------------------------------------------------------------
75 ElementPtr Group::getChild(const SGPropertyNode* node)
77 ChildList::iterator child = findChild(node);
78 if( child == _children.end() )
84 //----------------------------------------------------------------------------
85 void Group::update(double dt)
87 BOOST_FOREACH( ChildList::value_type child, _children )
88 child.second->update(dt);
93 //----------------------------------------------------------------------------
94 bool Group::handleLocalMouseEvent(const canvas::MouseEvent& event)
96 // Iterate in reverse order as last child is displayed on top
97 BOOST_REVERSE_FOREACH( ChildList::value_type child, _children )
99 if( child.second->handleMouseEvent(event) )
105 //----------------------------------------------------------------------------
106 void Group::childAdded(SGPropertyNode* child)
108 if( child->getParent() != _node )
111 ChildFactories::iterator child_factory =
112 _child_factories.find( child->getNameString() );
113 if( child_factory != _child_factories.end() )
115 ElementPtr element = child_factory->second(_canvas, child, _style);
117 // Add to osg scene graph...
118 _transform->addChild( element->getMatrixTransform() );
119 _children.push_back( ChildList::value_type(child, element) );
124 _style[ child->getNameString() ] = child;
127 //----------------------------------------------------------------------------
128 void Group::childRemoved(SGPropertyNode* node)
130 if( node->getParent() != _node )
133 if( _child_factories.find(node->getNameString()) != _child_factories.end() )
135 ChildList::iterator child = findChild(node);
136 if( child == _children.end() )
141 "can't removed unknown child " << node->getDisplayName()
145 _transform->removeChild( child->second->getMatrixTransform() );
146 _children.erase(child);
151 Style::iterator style = _style.find(node->getNameString());
152 if( style != _style.end() )
157 //----------------------------------------------------------------------------
158 void Group::childChanged(SGPropertyNode* node)
160 if( node->getParent()->getParent() == _node
161 && node->getNameString() == "z-index" )
162 return handleZIndexChanged(node->getParent(), node->getIntValue());
165 //----------------------------------------------------------------------------
166 void Group::handleZIndexChanged(SGPropertyNode* node, int z_index)
168 ChildList::iterator child = findChild(node);
169 if( child == _children.end() )
172 osg::Node* tf = child->second->getMatrixTransform();
173 int index = _transform->getChildIndex(tf),
176 ChildList::iterator next = child;
179 while( next != _children.end()
180 && next->first->getIntValue("z-index", 0) <= z_index )
186 if( index_new != index )
188 _children.insert(next, *child);
192 ChildList::iterator prev = child;
193 while( prev != _children.begin()
194 && (--prev)->first->getIntValue("z-index", 0) > z_index)
199 if( index == index_new )
202 _children.insert(prev, *child);
205 _transform->removeChild(index);
206 _transform->insertChild(index_new, tf);
208 _children.erase(child);
214 "canvas::Group: Moved element " << index << " to position " << index_new
218 //----------------------------------------------------------------------------
219 Group::ChildList::iterator Group::findChild(const SGPropertyNode* node)
225 boost::bind(&ChildList::value_type::first, _1) == node
229 } // namespace canvas
230 } // namespace simgear