From b8b105b54e3ce90f5909056b44e8d36f2949ec70 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 4 Apr 2018 13:40:06 +0100
Subject: [PATCH] Added EventHandler to report key and mouse events for
 debugging purposes

---
 .../osgcompositeviewer/osgcompositeviewer.cpp | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/examples/osgcompositeviewer/osgcompositeviewer.cpp b/examples/osgcompositeviewer/osgcompositeviewer.cpp
index 4a2394f5c..7fe5184ce 100644
--- a/examples/osgcompositeviewer/osgcompositeviewer.cpp
+++ b/examples/osgcompositeviewer/osgcompositeviewer.cpp
@@ -125,6 +125,42 @@ public:
 
 };
 
+class EventHandler : public osgGA::GUIEventHandler {
+public:
+
+    EventHandler() {}
+
+    ~EventHandler() {}
+
+    bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa)
+    {
+        osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
+        if (!view) return false;
+
+        switch(ea.getEventType())
+        {
+            case(osgGA::GUIEventAdapter::KEYDOWN):
+            case(osgGA::GUIEventAdapter::KEYUP):
+                OSG_NOTICE<<"View "<<view<<", name="<<view->getName()<<" keyboard event "<<ea.getEventType()<<" key="<<ea.getKey()<<" ea.getX()="<<ea.getX()<<" ea.getY()="<<ea.getY()<<std::endl;
+                break;
+
+            case(osgGA::GUIEventAdapter::MOVE):
+            case(osgGA::GUIEventAdapter::DRAG):
+            case(osgGA::GUIEventAdapter::PUSH):
+            case(osgGA::GUIEventAdapter::RELEASE):
+                OSG_NOTICE<<"View "<<view<<", name="<<view->getName()<<" mouse event "<<ea.getEventType()<<" ea.getX()="<<ea.getX()<<" ea.getY()="<<ea.getY()<<std::endl;
+                break;
+
+            default:
+                // OSG_NOTICE<<"View "<<view<<", name="<<view->getName()<<" general event "<<ea.getEventType()<<std::endl;
+                break;
+        }
+
+        return false;
+    }
+
+};
+
 
 int main( int argc, char **argv )
 {
@@ -217,6 +253,8 @@ int main( int argc, char **argv )
             statesetManipulator->setStateSet(view->getCamera()->getOrCreateStateSet());
 
             view->addEventHandler( statesetManipulator.get() );
+
+            view->addEventHandler( new EventHandler());
         }
 
         // view two
@@ -234,6 +272,8 @@ int main( int argc, char **argv )
 
             // add the handler for doing the picking
             view->addEventHandler(new PickHandler());
+
+            view->addEventHandler( new EventHandler());
         }
     }