]> git.mxchange.org Git - simgear.git/blob - simgear/canvas/elements/CanvasGroup.cxx
Jenkins has some problems with bind and lambdas. Let's try it with ordinary function...
[simgear.git] / simgear / canvas / elements / CanvasGroup.cxx
1 // A group of 2D Canvas elements
2 //
3 // Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
4 //
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.
9 //
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.
14 //
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
18
19 #include "CanvasGroup.hxx"
20 #include "CanvasImage.hxx"
21 #include "CanvasMap.hxx"
22 #include "CanvasPath.hxx"
23 #include "CanvasText.hxx"
24
25 #include <boost/foreach.hpp>
26
27 namespace simgear
28 {
29 namespace canvas
30 {
31   /**
32    * Create an canvas Element of type T
33    */
34   template<typename T>
35   ElementPtr createElement( const CanvasWeakPtr& canvas,
36                             const SGPropertyNode_ptr& node,
37                             const Style& style )
38   {
39     return ElementPtr( new T(canvas, node, style) );
40   }
41
42   //----------------------------------------------------------------------------
43   Group::Group( const CanvasWeakPtr& canvas,
44                 const SGPropertyNode_ptr& node,
45                 const Style& parent_style ):
46     Element(canvas, node, parent_style)
47   {
48     _child_factories["group"] = &createElement<Group>;
49     _child_factories["image"] = &createElement<Image>;
50     _child_factories["map"  ] = &createElement<Map  >;
51     _child_factories["path" ] = &createElement<Path >;
52     _child_factories["text" ] = &createElement<Text >;
53   }
54
55   //----------------------------------------------------------------------------
56   Group::~Group()
57   {
58
59   }
60
61   //----------------------------------------------------------------------------
62   void Group::update(double dt)
63   {
64     BOOST_FOREACH( ChildList::value_type child, _children )
65       child.second->update(dt);
66
67     Element::update(dt);
68   }
69
70   //----------------------------------------------------------------------------
71   bool Group::handleLocalMouseEvent(const canvas::MouseEvent& event)
72   {
73     // Iterate in reverse order as last child is displayed on top
74     BOOST_REVERSE_FOREACH( ChildList::value_type child, _children )
75     {
76       if( child.second->handleMouseEvent(event) )
77         return true;
78     }
79     return false;
80   }
81
82   //----------------------------------------------------------------------------
83   void Group::childAdded(SGPropertyNode* child)
84   {
85     if( child->getParent() != _node )
86       return;
87
88     ChildFactories::iterator child_factory =
89       _child_factories.find( child->getNameString() );
90     if( child_factory != _child_factories.end() )
91     {
92       ElementPtr element = child_factory->second(_canvas, child, _style);
93
94       // Add to osg scene graph...
95       _transform->addChild( element->getMatrixTransform() );
96       _children.push_back( ChildList::value_type(child, element) );
97
98       return;
99     }
100
101     _style[ child->getNameString() ] = child;
102   }
103
104   //----------------------------------------------------------------------------
105   struct ChildFinder
106   {
107     public:
108       ChildFinder(SGPropertyNode *node):
109         _node(node)
110       {}
111
112       bool operator()(const Group::ChildList::value_type& el) const
113       {
114         return el.first == _node;
115       }
116
117     private:
118       SGPropertyNode *_node;
119   };
120
121   //----------------------------------------------------------------------------
122   void Group::childRemoved(SGPropertyNode* node)
123   {
124     if( node->getParent() != _node )
125       return;
126
127     if( _child_factories.find(node->getNameString()) != _child_factories.end() )
128     {
129       ChildFinder pred(node);
130       ChildList::iterator child =
131         std::find_if(_children.begin(), _children.end(), pred);
132
133       if( child == _children.end() )
134         SG_LOG
135         (
136           SG_GL,
137           SG_WARN,
138           "can't removed unknown child " << node->getDisplayName()
139         );
140       else
141       {
142         _transform->removeChild( child->second->getMatrixTransform() );
143         _children.erase(child);
144       }
145     }
146     else
147     {
148       Style::iterator style = _style.find(node->getNameString());
149       if( style != _style.end() )
150         _style.erase(style);
151     }
152   }
153
154   //----------------------------------------------------------------------------
155   void Group::childChanged(SGPropertyNode* node)
156   {
157     if(    node->getParent()->getParent() == _node
158         && node->getNameString() == "z-index" )
159       return handleZIndexChanged(node->getParent(), node->getIntValue());
160   }
161
162   //----------------------------------------------------------------------------
163   void Group::handleZIndexChanged(SGPropertyNode* node, int z_index)
164   {
165     ChildFinder pred(node);
166     ChildList::iterator child =
167       std::find_if(_children.begin(), _children.end(), pred);
168
169     if( child == _children.end() )
170       return;
171
172     osg::Node* tf = child->second->getMatrixTransform();
173     int index = _transform->getChildIndex(tf),
174         index_new = index;
175
176     ChildList::iterator next = child;
177     ++next;
178
179     while(    next != _children.end()
180            && next->first->getIntValue("z-index", 0) <= z_index )
181     {
182       ++index_new;
183       ++next;
184     }
185
186     if( index_new != index )
187     {
188       _children.insert(next, *child);
189     }
190     else
191     {
192       ChildList::iterator prev = child;
193       while(    prev != _children.begin()
194              && (--prev)->first->getIntValue("z-index", 0) > z_index)
195       {
196         --index_new;
197       }
198
199       if( index == index_new )
200         return;
201
202       _children.insert(prev, *child);
203     }
204
205     _transform->removeChild(index);
206     _transform->insertChild(index_new, tf);
207
208     _children.erase(child);
209
210     SG_LOG
211     (
212       SG_GENERAL,
213       SG_INFO,
214       "canvas::Group: Moved element " << index << " to position " << index_new
215     );
216   }
217
218 } // namespace canvas
219 } // namespace simgear