Added beginings of Text implementation

include/osgPresentation/Element

@@ -15,6 +15,8 @@
 #define OSGPRESENTATION_ELEMENT 1
 
 #include <osgPresentation/Group>
+#include <osgUtil/UpdateVisitor>
+#include <osgGA/EventVisitor>
 
 namespace osgPresentation {
 
@@ -31,6 +33,31 @@ class OSGPRESENTATION_EXPORT Element : public osgPresentation::Group
 
         META_Node(osgPresentation, Element);
 
+        virtual void traverse(osg::NodeVisitor& nv);
+
+        /** Load the subgraph implementation of the element.*/
+        virtual bool load() { return false; }
+
+        /** Remove the the subgraph implementation, freeing up space.*/
+        virtual bool unload() { removeChildren(0, getNumChildren()); return true; }
+
+        /** Return true if the subgraph implementation has been loaded.*/
+        virtual bool loaded() const { return getNumChildren()!=0; }
+
+
+        /** Do updates as part of the update traversal.*/
+        virtual void updateTraversal(osgUtil::UpdateVisitor& uv);
+
+        /** Do updates as part of the event traversal.*/
+        virtual void eventTraversal(osgGA::EventVisitor& ev);
+
+        /** Enter the element for the first time, starting any animations, movies, audio etc..*/
+        virtual void enter() {}
+
+        /** Leave the element, stopping any animations, movies, audio etc..*/
+        virtual void leave() {}
+
+
 protected :
 
         virtual ~Element() {}

include/osgPresentation/Group

@@ -19,6 +19,10 @@
 
 namespace osgPresentation {
 
+
+typedef std::pair< osg::ref_ptr<osg::Object>, std::string> ObjectDescription;
+typedef std::list< ObjectDescription > PropertyList;
+
 /** osgPresentation::Group
 */
 class OSGPRESENTATION_EXPORT Group : public osg::MatrixTransform
@@ -49,6 +53,10 @@ class OSGPRESENTATION_EXPORT Group : public osg::MatrixTransform
             return setUserValue(name, value);
         }
 
+        /** Get all types of Properties supported by Presentation Object type, return true if the Properties are supported, false otherwise.*/
+        virtual bool getSupportedProperties(PropertyList&) { return false; }
+
+
     protected :
 
         virtual ~Group() {}

include/osgPresentation/Text

@@ -31,6 +31,12 @@ class OSGPRESENTATION_EXPORT Text : public osgPresentation::Element
 
         META_Node(osgPresentation, Text);
 
+        /** load the text subgraph.*/
+        virtual bool load();
+
+        /** Get all types of Properties supported by Presentation Object type, return true if the Properties are supported, false otherwise.*/
+        virtual bool getSupportedProperties(PropertyList&);
+
 protected :
 
         virtual ~Text() {}

src/osgPresentation/CMakeLists.txt

@@ -38,6 +38,9 @@ SET(TARGET_H
 # FIXME: For OS X, need flag for Framework or dylib
 SET(TARGET_SRC
     Cursor.cpp
+    Group.cpp
+    Element.cpp
+    Text.cpp
 
     deprecated/AnimationMaterial.cpp
     deprecated/CompileSlideCallback.cpp

src/osgPresentation/Element.cpp

@@ -0,0 +1,52 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2013 Robert Osfield
+ *
+ * This library is open source and may be redistributed and/or modified under
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include <osgPresentation/Element>
+
+using namespace osgPresentation;
+
+
+void Element::traverse(osg::NodeVisitor& nv)
+{
+    if (nv.getVisitorType()==osg::NodeVisitor::UPDATE_VISITOR)
+    {
+        osgUtil::UpdateVisitor* uv = dynamic_cast<osgUtil::UpdateVisitor*>(&nv);
+        if (uv)
+        {
+            updateTraversal(*uv);
+            return;
+        }
+    }
+    else if (nv.getVisitorType()==osg::NodeVisitor::EVENT_VISITOR)
+    {
+        osgGA::EventVisitor* ev = dynamic_cast<osgGA::EventVisitor*>(&nv);
+        if (ev)
+        {
+            eventTraversal(*ev);
+            return;
+        }
+    }
+    osgPresentation::Group::traverse(nv);
+}
+
+void Element::updateTraversal(osgUtil::UpdateVisitor& uv)
+{
+    OSG_NOTICE<<"Element::updateTraversal()"<<std::endl;
+    osgPresentation::Group::traverse(uv);
+}
+
+void Element::eventTraversal(osgGA::EventVisitor& ev)
+{
+    OSG_NOTICE<<"Element::eventTraversal()"<<std::endl;
+    osgPresentation::Group::traverse(ev);
+}

src/osgPresentation/Group.cpp

@@ -0,0 +1,18 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2013 Robert Osfield
+ *
+ * This library is open source and may be redistributed and/or modified under
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include <osgPresentation/Group>
+
+using namespace osgPresentation;
+
+/** Nothing to implement yet...*/

src/osgPresentation/Text.cpp

@@ -0,0 +1,33 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2013 Robert Osfield
+ *
+ * This library is open source and may be redistributed and/or modified under
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include <osgPresentation/Text>
+#include <osg/ValueObject>
+#include <osgText/Text>
+
+using namespace osgPresentation;
+
+
+bool Text::load()
+{
+    return false;
+}
+
+bool Text::getSupportedProperties(PropertyList& pl)
+{
+    pl.push_back(ObjectDescription(new osg::StringValueObject("string",""), std::string("Text to render.")));
+    pl.push_back(ObjectDescription(new osg::StringValueObject("font",""), std::string("Font name.")));
+    pl.push_back(ObjectDescription(new osg::DoubleValueObject("width",1.0), std::string("Maximum width of the text.")));
+    pl.push_back(ObjectDescription(new osg::DoubleValueObject("character_size",0.06), std::string("Character size.")));
+    return true;
+}