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"
24 #include <simgear/canvas/CanvasEventVisitor.hxx>
25 #include <simgear/canvas/MouseEvent.hxx>
27 #include <boost/bind.hpp>
28 #include <boost/foreach.hpp>
29 #include <boost/lambda/core.hpp>
36 * Create an canvas Element of type T
39 ElementPtr createElement( const CanvasWeakPtr& canvas,
40 const SGPropertyNode_ptr& node,
44 ElementPtr el( new T(canvas, node, style, parent) );
49 //----------------------------------------------------------------------------
50 Group::Group( const CanvasWeakPtr& canvas,
51 const SGPropertyNode_ptr& node,
52 const Style& parent_style,
54 Element(canvas, node, parent_style, parent)
56 _child_factories["group"] = &createElement<Group>;
57 _child_factories["image"] = &createElement<Image>;
58 _child_factories["map" ] = &createElement<Map >;
59 _child_factories["path" ] = &createElement<Path >;
60 _child_factories["text" ] = &createElement<Text >;
63 //----------------------------------------------------------------------------
69 //----------------------------------------------------------------------------
70 ElementPtr Group::createChild( const std::string& type,
71 const std::string& id )
73 SGPropertyNode* node = _node->addChild(type, 0, false);
75 node->setStringValue("id", id);
77 return getChild(node);
80 //----------------------------------------------------------------------------
81 ElementPtr Group::getChild(const SGPropertyNode* node)
83 ChildList::iterator child = findChild(node);
84 if( child == _children.end() )
90 //----------------------------------------------------------------------------
91 ElementPtr Group::getElementById(const std::string& id)
93 std::vector<GroupPtr> groups;
95 BOOST_FOREACH( ChildList::value_type child, _children )
97 const ElementPtr& el = child.second;
98 if( el->getProps()->getStringValue("id") == id )
101 GroupPtr group = boost::dynamic_pointer_cast<Group>(el);
103 groups.push_back(group);
106 BOOST_FOREACH( GroupPtr group, groups )
108 ElementPtr el = group->getElementById(id);
116 //----------------------------------------------------------------------------
117 void Group::update(double dt)
119 BOOST_FOREACH( ChildList::value_type child, _children )
120 child.second->update(dt);
125 //----------------------------------------------------------------------------
126 bool Group::traverse(EventVisitor& visitor)
128 // Iterate in reverse order as last child is displayed on top
129 BOOST_REVERSE_FOREACH( ChildList::value_type child, _children )
131 if( child.second->accept(visitor) )
137 //----------------------------------------------------------------------------
138 bool Group::setStyle(const SGPropertyNode* style)
140 if( style->getParent() != _node
141 && _style.find(style->getNameString()) != _style.end() )
144 bool handled = false;
145 BOOST_FOREACH( ChildList::value_type child, _children )
147 if( child.second->setStyle(style) )
154 //----------------------------------------------------------------------------
155 osg::BoundingBox Group::getTransformedBounds(const osg::Matrix& m) const
159 BOOST_FOREACH( ChildList::value_type child, _children )
161 if( !child.second->getMatrixTransform()->getNodeMask() )
166 child.second->getTransformedBounds
168 child.second->getMatrixTransform()->getMatrix() * m
176 //----------------------------------------------------------------------------
177 void Group::childAdded(SGPropertyNode* child)
179 if( child->getParent() != _node )
182 ChildFactories::iterator child_factory =
183 _child_factories.find( child->getNameString() );
184 if( child_factory != _child_factories.end() )
186 ElementPtr element = child_factory->second(_canvas, child, _style, this);
188 // Add to osg scene graph...
189 _transform->addChild( element->getMatrixTransform() );
190 _children.push_back( ChildList::value_type(child, element) );
195 _style[ child->getNameString() ] = child;
199 //----------------------------------------------------------------------------
200 void Group::childRemoved(SGPropertyNode* node)
202 if( node->getParent() != _node )
205 if( _child_factories.find(node->getNameString()) != _child_factories.end() )
207 ChildList::iterator child = findChild(node);
208 if( child == _children.end() )
213 "can't removed unknown child " << node->getDisplayName()
217 _transform->removeChild( child->second->getMatrixTransform() );
218 _children.erase(child);
223 Style::iterator style = _style.find(node->getNameString());
224 if( style != _style.end() )
229 //----------------------------------------------------------------------------
230 void Group::childChanged(SGPropertyNode* node)
232 if( node->getParent()->getParent() == _node
233 && node->getNameString() == "z-index" )
234 return handleZIndexChanged(node->getParent(), node->getIntValue());
237 //----------------------------------------------------------------------------
238 void Group::handleZIndexChanged(SGPropertyNode* node, int z_index)
240 ChildList::iterator child = findChild(node);
241 if( child == _children.end() )
244 osg::Node* tf = child->second->getMatrixTransform();
245 int index = _transform->getChildIndex(tf),
248 ChildList::iterator next = child;
251 while( next != _children.end()
252 && next->first->getIntValue("z-index", 0) <= z_index )
258 if( index_new != index )
260 _children.insert(next, *child);
264 ChildList::iterator prev = child;
265 while( prev != _children.begin()
266 && (--prev)->first->getIntValue("z-index", 0) > z_index)
271 if( index == index_new )
274 _children.insert(prev, *child);
277 _transform->removeChild(index);
278 _transform->insertChild(index_new, tf);
280 _children.erase(child);
286 "canvas::Group: Moved element " << index << " to position " << index_new
290 //----------------------------------------------------------------------------
291 Group::ChildList::iterator Group::findChild(const SGPropertyNode* node)
297 boost::bind(&ChildList::value_type::first, _1) == node
301 } // namespace canvas
302 } // namespace simgear