Added osgViewer::HelpHandler

VisualStudio/osgViewer/osgViewer.dsp

@@ -179,6 +179,10 @@ SOURCE=..\..\src\osgViewer\CompositeViewer.cpp
 # End Source File
 # Begin Source File
 
+SOURCE=..\..\src\osgViewer\HelpHandler.cpp
+# End Source File
+# Begin Source File
+
 SOURCE=..\..\src\osgViewer\StatsHandler.cpp
 # End Source File
 # Begin Source File
@@ -223,6 +227,10 @@ SOURCE=..\..\Include\osgViewer\SimpleViewer
 # End Source File
 # Begin Source File
 
+SOURCE=..\..\Include\osgViewer\HelpHandler
+# End Source File
+# Begin Source File
+
 SOURCE=..\..\Include\osgViewer\StatsHandler
 # End Source File
 # Begin Source File

applications/osgviewer/osgviewer.cpp

@@ -18,6 +18,7 @@
 
 #include <osgViewer/Viewer>
 #include <osgViewer/StatsHandler>
+#include <osgViewer/HelpHandler>
 
 #include <osgGA/TrackballManipulator>
 #include <osgGA/FlightManipulator>
@@ -113,6 +114,15 @@ public:
         return false;
     }
     
+    /** Get the keyboard and mouse usage of this manipulator.*/
+    virtual void getUsage(osg::ApplicationUsage& usage) const
+    {
+        usage.addKeyboardMouseBinding("m","Toggle threading model.");
+        usage.addKeyboardMouseBinding("e","Toggle the placement of the end of frame barrier.");
+    }
+
+
+
     bool _done;
 };
 
@@ -197,6 +207,8 @@ int main(int argc, char** argv)
     // add the stats handler
     viewer.addEventHandler(new osgViewer::StatsHandler);
 
+    // add the help handler
+    viewer.addEventHandler(new osgViewer::HelpHandler(arguments.getApplicationUsage()));
 
     while (arguments.read("--SingleThreaded")) viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
     while (arguments.read("--CullDrawThreadPerContext")) viewer.setThreadingModel(osgViewer::Viewer::CullDrawThreadPerContext);

include/osg/ApplicationUsage

@@ -14,7 +14,7 @@
 #ifndef OSG_APPLICATIONUSAGE
 #define OSG_APPLICATIONUSAGE 1
 
-#include <osg/Export>
+#include <osg/Referenced>
 
 #include <map>
 #include <string>
@@ -22,7 +22,7 @@
 
 namespace osg {
 
-class OSG_EXPORT ApplicationUsage
+class OSG_EXPORT ApplicationUsage : public osg::Referenced
 {
     public:
         
@@ -88,6 +88,8 @@ class OSG_EXPORT ApplicationUsage
 
     protected:
     
+        virtual ~ApplicationUsage() {}
+
         std::string _applicationName;
         std::string _description;
         std::string _commandLineUsage;

include/osg/ArgumentParser

@@ -15,6 +15,8 @@
 #define OSG_ARGUMENTPARSER 1
 
 #include <osg/Export>
+#include <osg/ref_ptr>
+#include <osg/ApplicationUsage>
 
 #include <map>
 #include <string>
@@ -22,9 +24,6 @@
 
 namespace osg {
 
-// forward declare
-class ApplicationUsage;
-
 class OSG_EXPORT ArgumentParser
 {
     public:
@@ -89,8 +88,8 @@ class OSG_EXPORT ArgumentParser
         ArgumentParser(int* argc,char **argv);
 
         void setApplicationUsage(ApplicationUsage* usage) { _usage = usage; }
-        ApplicationUsage* getApplicationUsage() { return _usage; }
+        ApplicationUsage* getApplicationUsage() { return _usage.get(); }
-        const ApplicationUsage* getApplicationUsage() const { return _usage; }
+        const ApplicationUsage* getApplicationUsage() const { return _usage.get(); }
 
         /** Return the argument count. */
         int& argc() { return *_argc; }
@@ -190,7 +189,7 @@ class OSG_EXPORT ArgumentParser
         int*                            _argc;
         char**                          _argv;
         ErrorMessageMap                 _errorMessageMap;
-        ApplicationUsage*   _usage;
+        ref_ptr<ApplicationUsage>       _usage;
         
 };
 

include/osgViewer/HelpHandler

@@ -0,0 +1,59 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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.
+*/
+
+#ifndef OSGVIEWER_HELPHANDLER
+#define OSGVIEWER_HELPHANDLER 1
+
+#include <osgViewer/Viewer>
+
+#include <osg/ApplicationUsage>
+
+namespace osgViewer {
+
+class OSGVIEWER_EXPORT HelpHandler : public osgGA::GUIEventHandler 
+{
+    public: 
+
+        HelpHandler(osg::ApplicationUsage* au=0);
+        
+        void setApplicationUsage(osg::ApplicationUsage* au) { _applicationUsage = au; }
+        osg::ApplicationUsage* getApplicationUsage() { return _applicationUsage.get(); }
+        const osg::ApplicationUsage* getApplicationUsage() const { return _applicationUsage.get(); }
+
+        void setKeyEventTogglesOnScreenHelp(int key) { _keyEventTogglesOnScreenHelp = key; }
+        int getKeyEventTogglesOnScreenHelp() const { return _keyEventTogglesOnScreenHelp; }
+        
+        bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa);
+
+        /** Get the keyboard and mouse usage of this manipulator.*/
+        virtual void getUsage(osg::ApplicationUsage& usage) const;
+
+    protected:
+
+        void setUpHUDCamera(osgViewer::Viewer* viewer);
+
+        void setUpScene(osgViewer::Viewer* viewer);
+        
+        osg::ref_ptr<osg::ApplicationUsage> _applicationUsage;
+
+        int                                 _keyEventTogglesOnScreenHelp;
+
+        bool                                _helpEnabled;
+        osg::ref_ptr<osg::Camera>           _camera;
+        osg::ref_ptr<osg::Switch>           _switch;
+        
+};
+
+}
+
+#endif

include/osgViewer/StatsHandler

@@ -45,6 +45,9 @@ class OSGVIEWER_EXPORT StatsHandler : public osgGA::GUIEventHandler
 
         double getBlockMultiplier() const { return _blockMultiplier; }
 
+        /** Get the keyboard and mouse usage of this manipulator.*/
+        virtual void getUsage(osg::ApplicationUsage& usage) const;
+
     protected:
 
         void setUpHUDCamera(osgViewer::Viewer* viewer);

include/osgViewer/Viewer

@@ -161,6 +161,9 @@ class OSGVIEWER_EXPORT Viewer : public osgViewer::View
         /** Set up the Operations to render the various viewer cameras on the viewers graphics windows.*/
         void setUpRenderingSupport();
 
+        /** Get the keyboard and mouse usage of this viewer.*/
+        virtual void getUsage(osg::ApplicationUsage& usage) const;
+
     protected:
     
         void checkWindowStatus();

src/osg/ApplicationUsage.cpp

@@ -1,5 +1,19 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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 <osg/ApplicationUsage>
 #include <osg/Math>
+#include <osg/ref_ptr>
 
 using namespace osg;
 
@@ -10,8 +24,8 @@ ApplicationUsage::ApplicationUsage(const std::string& commandLineUsage):
 
 ApplicationUsage* ApplicationUsage::instance()
 {
-    static ApplicationUsage s_applicationUsage;
+    static osg::ref_ptr<ApplicationUsage> s_applicationUsage = new ApplicationUsage;
-    return &s_applicationUsage;
+    return s_applicationUsage.get();
 }
 
 void ApplicationUsage::addUsageExplanation(Type type,const std::string& option,const std::string& explanation)

src/osg/ArgumentParser.cpp

@@ -1,3 +1,16 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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 <osg/ArgumentParser>
 #include <osg/ApplicationUsage>
 #include <osg/Notify>
@@ -552,7 +565,7 @@ void ArgumentParser::reportError(const std::string& message,ErrorSeverity severi
 void ArgumentParser::reportRemainingOptionsAsUnrecognized(ErrorSeverity severity)
 {
     std::set<std::string> options;
-    if (_usage) 
+    if (_usage.valid()) 
     {
         // parse the usage options to get all the option that the application can potential handle.
         for(ApplicationUsage::UsageMap::const_iterator itr=_usage->getCommandLineOptions().begin();

src/osgViewer/GNUmakefile

@@ -7,6 +7,7 @@ CXXFILES = \
 	Scene.cpp\
 	SimpleViewer.cpp\
 	StatsHandler.cpp\
+	HelpHandler.cpp\
 	Version.cpp\
 	View.cpp\
 	Viewer.cpp\

src/osgViewer/HelpHandler.cpp

@@ -0,0 +1,173 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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 <osgViewer/HelpHandler>
+
+#include <osg/PolygonMode>
+
+#include <osgText/Text>
+
+using namespace osgViewer;
+
+HelpHandler::HelpHandler(osg::ApplicationUsage* au):
+    _applicationUsage(au),
+    _keyEventTogglesOnScreenHelp('h'),
+    _helpEnabled(false)
+{
+}
+
+bool HelpHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa)
+{
+    osgViewer::Viewer* viewer = dynamic_cast<osgViewer::Viewer*>(&aa);
+    if (!viewer) return false;
+    
+    switch(ea.getEventType())
+    {
+        case(osgGA::GUIEventAdapter::KEYDOWN):
+        {
+            if (ea.getKey()==_keyEventTogglesOnScreenHelp)
+            {
+                if (!_camera.valid())
+                {
+                    setUpHUDCamera(viewer);
+                    setUpScene(viewer);
+                }
+
+                _helpEnabled = !_helpEnabled;
+
+                if (_helpEnabled)
+                {
+                    _camera->setNodeMask(0xffffffff);
+                }
+                else
+                {
+                    _camera->setNodeMask(0);
+                }
+                return true;
+            }
+        }
+        default: break;
+    }
+
+    return false;
+
+}
+
+void HelpHandler::setUpHUDCamera(osgViewer::Viewer* viewer)
+{
+    osgViewer::Viewer::Windows windows;
+    viewer->getWindows(windows);
+
+    if (windows.empty()) return;
+
+    osgViewer::GraphicsWindow* window = windows.front();
+
+    _camera = new osg::Camera;
+    _camera->setGraphicsContext(window);
+    _camera->setViewport(0, 0, window->getTraits()->width, window->getTraits()->height);
+
+    _camera->setProjectionMatrix(osg::Matrix::ortho2D(0,1280,0,1024));
+    _camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
+    _camera->setViewMatrix(osg::Matrix::identity());
+
+    // only clear the depth buffer
+    _camera->setClearMask(0);
+
+    viewer->setUpRenderingSupport();
+}
+
+void HelpHandler::setUpScene(osgViewer::Viewer* viewer)
+{
+    _switch = new osg::Switch;
+
+    _camera->addChild(_switch.get());
+
+    osg::StateSet* stateset = _switch->getOrCreateStateSet();
+    stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
+    stateset->setMode(GL_BLEND,osg::StateAttribute::ON);
+    stateset->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
+    stateset->setAttribute(new osg::PolygonMode(), osg::StateAttribute::PROTECTED);
+
+    std::string font("fonts/arial.ttf");
+
+    if (!_applicationUsage) setApplicationUsage(new osg::ApplicationUsage());
+
+    viewer->getUsage(*_applicationUsage);
+
+    float leftPos = 10.0f;
+    float startDescription = 200.0f;
+    float characterSize = 20.0f;
+
+    osg::Vec3 pos(leftPos,1000.0f,0.0f);
+    osg::Vec4 color(1.0f,1.0f,1.0f,1.0f);
+
+    osg::Geode* geode = new osg::Geode();
+    _switch->addChild(geode, true);
+
+    // application description
+    if (!_applicationUsage->getDescription().empty())
+    {
+
+        osg::ref_ptr<osgText::Text> label = new osgText::Text;
+        geode->addDrawable( label.get() );
+
+        label->setColor(color);
+        label->setBackdropType(osgText::Text::OUTLINE);
+        label->setFont(font);
+        label->setCharacterSize(characterSize);
+        label->setPosition(pos);
+        label->setText(_applicationUsage->getDescription());
+
+        pos.x() = label->getBound().xMax();
+        pos.y() -= characterSize*2.5f;
+    }
+
+    const osg::ApplicationUsage::UsageMap& keyboardBinding = _applicationUsage->getKeyboardMouseBindings();
+    
+    for(osg::ApplicationUsage::UsageMap::const_iterator itr = keyboardBinding.begin();
+        itr != keyboardBinding.end();
+        ++itr)
+    {
+        pos.x() = leftPos;
+
+        osg::ref_ptr<osgText::Text> key = new osgText::Text;
+        geode->addDrawable( key.get() );
+        key->setColor(color);
+        key->setBackdropType(osgText::Text::OUTLINE);
+        key->setFont(font);
+        key->setCharacterSize(characterSize);
+        key->setPosition(pos);
+        key->setText(itr->first);
+
+        pos.x() = startDescription;
+
+        osg::ref_ptr<osgText::Text> description = new osgText::Text;
+        geode->addDrawable( description.get() );
+        description->setColor(color);
+        description->setBackdropType(osgText::Text::OUTLINE);
+        description->setFont(font);
+        description->setCharacterSize(characterSize);
+        description->setPosition(pos);
+
+        description->setText(itr->second);
+
+        pos.y() -= characterSize*1.5f;
+
+    }
+}
+
+
+void HelpHandler::getUsage(osg::ApplicationUsage& usage) const
+{
+    usage.addKeyboardMouseBinding("h","Onscreen help.");
+}

src/osgViewer/StatsHandler.cpp

@@ -806,4 +806,11 @@ osg::Node* StatsHandler::createCameraStats(const std::string& font, osg::Vec3& p
     return group;
 }
 
+
+void StatsHandler::getUsage(osg::ApplicationUsage& usage) const
+{
+    usage.addKeyboardMouseBinding("s","Onscreen stats.");
+    usage.addKeyboardMouseBinding("S","Output stats to console.");
+}
+
 }

src/osgViewer/Viewer.cpp

@@ -2070,3 +2070,19 @@ void Viewer::renderingTraversals()
         getStats()->setAttribute(_frameStamp->getFrameNumber(), "Rendering traversals time taken", endRenderingTraversals-beginRenderingTraversals);
     }
 }
+
+void Viewer::getUsage(osg::ApplicationUsage& usage) const
+{
+    if (_cameraManipulator.valid())
+    {
+        _cameraManipulator->getUsage(usage);
+    }
+
+    for(EventHandlers::const_iterator hitr = _eventHandlers.begin();
+        hitr != _eventHandlers.end();
+        ++hitr)
+    {
+        (*hitr)->getUsage(usage);
+    }
+
+}