]> git.mxchange.org Git - simgear.git/blobdiff - simgear/scene/model/SGPickAnimation.cxx
Restructure to avoid ordering issues.
[simgear.git] / simgear / scene / model / SGPickAnimation.cxx
index a282df192385f06cee018c97834141d8e21669a6..ddc41030d55ddaf53d3591e65adeb33b057e4d23 100644 (file)
      
 #include <simgear/scene/model/SGPickAnimation.hxx>
 
+#include <algorithm>
+
 #include <osg/Geode>
 #include <osg/PolygonOffset>
 #include <osg/PolygonMode>
 #include <osg/Material>
+#include <osgGA/GUIEventAdapter>
 
-#include <simgear/scene/material/EffectGeode.hxx>
+#include <simgear/sg_inlines.h>
 #include <simgear/scene/util/SGPickCallback.hxx>
+#include <simgear/scene/material/EffectGeode.hxx>
 #include <simgear/scene/util/SGSceneUserData.hxx>
 #include <simgear/structure/SGBinding.hxx>
 #include <simgear/scene/util/StateAttributeFactory.hxx>
+#include <simgear/scene/model/SGRotateTransform.hxx>
+#include <simgear/scene/model/SGTranslateTransform.hxx>
 
 using namespace simgear;
 
 using OpenThreads::Mutex;
 using OpenThreads::ScopedLock;
 
+static void readOptionalBindingList(const SGPropertyNode* aNode, SGPropertyNode* modelRoot,
+    const std::string& aName, SGBindingList& aBindings)
+{
+    const SGPropertyNode* n = aNode->getChild(aName);
+    if (n)
+        aBindings = readBindingList(n->getChildren("binding"), modelRoot);
+    
+}
+
+
+osg::Vec2d eventToWindowCoords(const osgGA::GUIEventAdapter* ea)
+{
+    using namespace osg;
+    const GraphicsContext* gc = ea->getGraphicsContext();
+    const GraphicsContext::Traits* traits = gc->getTraits() ;
+    // Scale x, y to the dimensions of the window
+    double x = (((ea->getX() - ea->getXmin()) / (ea->getXmax() - ea->getXmin()))
+         * (double)traits->width);
+    double y = (((ea->getY() - ea->getYmin()) / (ea->getYmax() - ea->getYmin()))
+         * (double)traits->height);
+    if (ea->getMouseYOrientation() == osgGA::GUIEventAdapter::Y_INCREASING_DOWNWARDS)
+        y = (double)traits->height - y;
+    
+    return osg::Vec2d(x, y);
+}
+
  class SGPickAnimation::PickCallback : public SGPickCallback {
  public:
    PickCallback(const SGPropertyNode* configNode,
                 SGPropertyNode* modelRoot) :
+     SGPickCallback(PriorityPanel),
      _repeatable(configNode->getBoolValue("repeatable", false)),
      _repeatInterval(configNode->getDoubleValue("interval-sec", 0.1))
    {
-     SG_LOG(SG_INPUT, SG_DEBUG, "Reading all bindings");
      std::vector<SGPropertyNode_ptr> bindings;
 
      bindings = configNode->getChildren("button");
      for (unsigned int i = 0; i < bindings.size(); ++i) {
-       _buttons.push_back( bindings[i]->getIntValue() );
-     }
-     bindings = configNode->getChildren("binding");
-     for (unsigned int i = 0; i < bindings.size(); ++i) {
-       _bindingsDown.push_back(new SGBinding(bindings[i], modelRoot));
+       _buttons.insert( bindings[i]->getIntValue() );
      }
 
-     const SGPropertyNode* upNode = configNode->getChild("mod-up");
-     if (!upNode)
-       return;
-     bindings = upNode->getChildren("binding");
-     for (unsigned int i = 0; i < bindings.size(); ++i) {
-       _bindingsUp.push_back(new SGBinding(bindings[i], modelRoot));
+     _bindingsDown = readBindingList(configNode->getChildren("binding"), modelRoot);
+     readOptionalBindingList(configNode, modelRoot, "mod-up", _bindingsUp);
+     
+     
+     if (configNode->hasChild("cursor")) {
+       _cursorName = configNode->getStringValue("cursor");
      }
    }
-   virtual bool buttonPressed(int button, const Info&)
+     
+     void addHoverBindings(const SGPropertyNode* hoverNode,
+                             SGPropertyNode* modelRoot)
+     {
+         _hover = readBindingList(hoverNode->getChildren("binding"), modelRoot);
+     }
+     
+   virtual bool buttonPressed(int button, const osgGA::GUIEventAdapter* ea, const Info&)
    {
-     bool found = false;
-     for( std::vector<int>::iterator it = _buttons.begin(); it != _buttons.end(); ++it ) {
-       if( *it == button ) {
-         found = true;
-         break;
+       if (_buttons.find(button) == _buttons.end()) {
+           return false;
        }
-     }
-     if (!found )
-       return false;
-     SGBindingList::const_iterator i;
-     for (i = _bindingsDown.begin(); i != _bindingsDown.end(); ++i)
-       (*i)->fire();
+       
+     fireBindingList(_bindingsDown);
      _repeatTime = -_repeatInterval;    // anti-bobble: delay start of repeat
      return true;
    }
-   virtual void buttonReleased(void)
+   virtual void buttonReleased(int keyModState)
    {
-     SGBindingList::const_iterator i;
-     for (i = _bindingsUp.begin(); i != _bindingsUp.end(); ++i)
-       (*i)->fire();
+       SG_UNUSED(keyModState);
+       fireBindingList(_bindingsUp);
    }
-   virtual void update(double dt)
+     
+   virtual void update(double dt, int keyModState)
    {
+     SG_UNUSED(keyModState);
      if (!_repeatable)
        return;
 
      _repeatTime += dt;
      while (_repeatInterval < _repeatTime) {
        _repeatTime -= _repeatInterval;
-       SGBindingList::const_iterator i;
-       for (i = _bindingsDown.begin(); i != _bindingsDown.end(); ++i)
-         (*i)->fire();
+         fireBindingList(_bindingsDown);
      }
    }
+   
+   virtual bool hover(const osg::Vec2d& windowPos, const Info& info)
+   {
+       if (_hover.empty()) {
+           return false;
+       }
+       
+       SGPropertyNode_ptr params(new SGPropertyNode);
+       params->setDoubleValue("x", windowPos.x());
+       params->setDoubleValue("y", windowPos.y());
+       fireBindingList(_hover, params.ptr());
+       return true;
+   }
+   
+   std::string getCursor() const
+   { return _cursorName; }
  private:
    SGBindingList _bindingsDown;
    SGBindingList _bindingsUp;
-   std::vector<int> _buttons;
+   SGBindingList _hover;
+   std::set<int> _buttons;
    bool _repeatable;
    double _repeatInterval;
    double _repeatTime;
+   std::string _cursorName;
  };
 
  class VncVisitor : public osg::NodeVisitor {
@@ -186,154 +231,588 @@ using OpenThreads::ScopedLock;
    bool _done;
  };
 
+///////////////////////////////////////////////////////////////////////////////
 
- class SGPickAnimation::VncCallback : public SGPickCallback {
- public:
-   VncCallback(const SGPropertyNode* configNode,
-                SGPropertyNode* modelRoot,
-                osg::Group *node)
-       : _node(node)
-   {
-     SG_LOG(SG_INPUT, SG_DEBUG, "Configuring VNC callback");
-     const char *cornernames[3] = {"top-left", "top-right", "bottom-left"};
-     SGVec3d *cornercoords[3] = {&_topLeft, &_toRight, &_toDown};
-     for (int c =0; c < 3; c++) {
-       const SGPropertyNode* cornerNode = configNode->getChild(cornernames[c]);
-       *cornercoords[c] = SGVec3d(
-         cornerNode->getDoubleValue("x"),
-         cornerNode->getDoubleValue("y"),
-         cornerNode->getDoubleValue("z"));
-     }
-     _toRight -= _topLeft;
-     _toDown -= _topLeft;
-     _squaredRight = dot(_toRight, _toRight);
-     _squaredDown = dot(_toDown, _toDown);
-   }
-
-   virtual bool buttonPressed(int button, const Info& info)
-   {
-     SGVec3d loc(info.local);
-     SG_LOG(SG_INPUT, SG_DEBUG, "VNC pressed " << button << ": " << loc);
-     loc -= _topLeft;
-     _x = dot(loc, _toRight) / _squaredRight;
-     _y = dot(loc, _toDown) / _squaredDown;
-     if (_x<0) _x = 0; else if (_x > 1) _x = 1;
-     if (_y<0) _y = 0; else if (_y > 1) _y = 1;
-     VncVisitor vv(_x, _y, 1 << button);
-     _node->accept(vv);
-     return vv.wasSuccessful();
-
-   }
-   virtual void buttonReleased(void)
-   {
-     SG_LOG(SG_INPUT, SG_DEBUG, "VNC release");
-     VncVisitor vv(_x, _y, 0);
-     _node->accept(vv);
-   }
-   virtual void update(double dt)
-   {
+class SGPickAnimation::VncCallback : public SGPickCallback {
+public:
+ VncCallback(const SGPropertyNode* configNode,
+              SGPropertyNode* modelRoot,
+              osg::Group *node)
+     : _node(node)
+ {
+   SG_LOG(SG_INPUT, SG_DEBUG, "Configuring VNC callback");
+   const char *cornernames[3] = {"top-left", "top-right", "bottom-left"};
+   SGVec3d *cornercoords[3] = {&_topLeft, &_toRight, &_toDown};
+   for (int c =0; c < 3; c++) {
+     const SGPropertyNode* cornerNode = configNode->getChild(cornernames[c]);
+     *cornercoords[c] = SGVec3d(
+       cornerNode->getDoubleValue("x"),
+       cornerNode->getDoubleValue("y"),
+       cornerNode->getDoubleValue("z"));
    }
- private:
-   double _x, _y;
-   osg::ref_ptr<osg::Group> _node;
-   SGVec3d _topLeft, _toRight, _toDown;
-   double _squaredRight, _squaredDown;
- };
+   _toRight -= _topLeft;
+   _toDown -= _topLeft;
+   _squaredRight = dot(_toRight, _toRight);
+   _squaredDown = dot(_toDown, _toDown);
+ }
 
- SGPickAnimation::SGPickAnimation(const SGPropertyNode* configNode,
-                                  SGPropertyNode* modelRoot) :
-   SGAnimation(configNode, modelRoot)
+ virtual bool buttonPressed(int button, const osgGA::GUIEventAdapter* ea, const Info& info)
  {
- }
+   SGVec3d loc(info.local);
+   SG_LOG(SG_INPUT, SG_DEBUG, "VNC pressed " << button << ": " << loc);
+   loc -= _topLeft;
+   _x = dot(loc, _toRight) / _squaredRight;
+   _y = dot(loc, _toDown) / _squaredDown;
+   if (_x<0) _x = 0; else if (_x > 1) _x = 1;
+   if (_y<0) _y = 0; else if (_y > 1) _y = 1;
+   VncVisitor vv(_x, _y, 1 << button);
+   _node->accept(vv);
+   return vv.wasSuccessful();
 
- namespace
+ }
+ virtual void buttonReleased(int keyModState)
  {
- OpenThreads::Mutex colorModeUniformMutex;
- osg::ref_ptr<osg::Uniform> colorModeUniform;
+   SG_UNUSED(keyModState);
+   SG_LOG(SG_INPUT, SG_DEBUG, "VNC release");
+   VncVisitor vv(_x, _y, 0);
+   _node->accept(vv);
  }
 
- osg::Group*
- SGPickAnimation::createAnimationGroup(osg::Group& parent)
- {
-   osg::Group* commonGroup = new osg::Group;
-
-   // Contains the normal geometry that is interactive
-   osg::ref_ptr<osg::Group> normalGroup = new osg::Group;
-   normalGroup->setName("pick normal group");
-   normalGroup->addChild(commonGroup);
-
-   // Used to render the geometry with just yellow edges
-   osg::Group* highlightGroup = new osg::Group;
-   highlightGroup->setName("pick highlight group");
-   highlightGroup->setNodeMask(simgear::PICK_BIT);
-   highlightGroup->addChild(commonGroup);
-   SGSceneUserData* ud;
-   ud = SGSceneUserData::getOrCreateSceneUserData(commonGroup);
-
-   // add actions that become macro and command invocations
-   std::vector<SGPropertyNode_ptr> actions;
-   actions = getConfig()->getChildren("action");
-   for (unsigned int i = 0; i < actions.size(); ++i)
-     ud->addPickCallback(new PickCallback(actions[i], getModelRoot()));
-   // Look for the VNC sessions that want raw mouse input
-   actions = getConfig()->getChildren("vncaction");
-   for (unsigned int i = 0; i < actions.size(); ++i)
-     ud->addPickCallback(new VncCallback(actions[i], getModelRoot(),
-       &parent));
-
-   // prepare a state set that paints the edges of this object yellow
-   // The material and texture attributes are set with
-   // OVERRIDE|PROTECTED in case there is a material animation on a
-   // higher node in the scene graph, which would have its material
-   // attribute set with OVERRIDE.
-   osg::StateSet* stateSet = highlightGroup->getOrCreateStateSet();
-   osg::Texture2D* white = StateAttributeFactory::instance()->getWhiteTexture();
-   stateSet->setTextureAttributeAndModes(0, white,
-                                         (osg::StateAttribute::ON
-                                          | osg::StateAttribute::OVERRIDE
-                                          | osg::StateAttribute::PROTECTED));
-   osg::PolygonOffset* polygonOffset = new osg::PolygonOffset;
-   polygonOffset->setFactor(-1);
-   polygonOffset->setUnits(-1);
-   stateSet->setAttribute(polygonOffset, osg::StateAttribute::OVERRIDE);
-   stateSet->setMode(GL_POLYGON_OFFSET_LINE,
-                     osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
-   osg::PolygonMode* polygonMode = new osg::PolygonMode;
-   polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
-                        osg::PolygonMode::LINE);
-   stateSet->setAttribute(polygonMode, osg::StateAttribute::OVERRIDE);
-   osg::Material* material = new osg::Material;
-   material->setColorMode(osg::Material::OFF);
-   material->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4f(0, 0, 0, 1));
-   // XXX Alpha < 1.0 in the diffuse material value is a signal to the
-   // default shader to take the alpha value from the material value
-   // and not the glColor. In many cases the pick animation geometry is
-   // transparent, so the outline would not be visible without this hack.
-   material->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4f(0, 0, 0, .95));
-   material->setEmission(osg::Material::FRONT_AND_BACK, osg::Vec4f(1, 1, 0, 1));
-   material->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4f(0, 0, 0, 0));
-   stateSet->setAttribute(
-       material, osg::StateAttribute::OVERRIDE | osg::StateAttribute::PROTECTED);
-   // The default shader has a colorMode uniform that mimics the
-   // behavior of Material color mode.
-   osg::Uniform* cmUniform = 0;
-   {
-       ScopedLock<Mutex> lock(colorModeUniformMutex);
-       if (!colorModeUniform.valid()) {
-           colorModeUniform = new osg::Uniform(osg::Uniform::INT, "colorMode");
-           colorModeUniform->set(0); // MODE_OFF
-           colorModeUniform->setDataVariance(osg::Object::STATIC);
-       }
-       cmUniform = colorModeUniform.get();
-   }
-   stateSet->addUniform(cmUniform,
-                        osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);
-   // Only add normal geometry if configured
-   if (getConfig()->getBoolValue("visible", true))
-     parent.addChild(normalGroup.get());
-   parent.addChild(highlightGroup);
+private:
+ double _x, _y;
+ osg::ref_ptr<osg::Group> _node;
+ SGVec3d _topLeft, _toRight, _toDown;
+ double _squaredRight, _squaredDown;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+SGPickAnimation::SGPickAnimation(const SGPropertyNode* configNode,
+                                SGPropertyNode* modelRoot) :
+  SGAnimation(configNode, modelRoot)
+{
+  std::vector<SGPropertyNode_ptr> names =
+    configNode->getChildren("proxy-name");
+  for (unsigned i = 0; i < names.size(); ++i) {
+    _proxyNames.push_back(names[i]->getStringValue());
+  }
+}
+
+void SGPickAnimation::apply(osg::Node* node)
+{
+    SGAnimation::apply(node);
+}
 
+namespace
+{
+OpenThreads::Mutex highlightStateSetMutex;
+osg::ref_ptr<osg::StateSet> static_highlightStateSet;
+}
+
+
+
+
+osg::StateSet* sharedHighlightStateSet()
+{
+  ScopedLock<Mutex> lock(highlightStateSetMutex);
+  if (!static_highlightStateSet.valid()) {
+    static_highlightStateSet = new osg::StateSet;
+    
+    osg::Texture2D* white = StateAttributeFactory::instance()->getWhiteTexture();
+    static_highlightStateSet->setTextureAttributeAndModes(0, white,
+                                          (osg::StateAttribute::ON
+                                           | osg::StateAttribute::OVERRIDE
+                                           | osg::StateAttribute::PROTECTED));
+    osg::PolygonOffset* polygonOffset = new osg::PolygonOffset;
+    polygonOffset->setFactor(-1);
+    polygonOffset->setUnits(-1);
+    static_highlightStateSet->setAttribute(polygonOffset, osg::StateAttribute::OVERRIDE);
+    static_highlightStateSet->setMode(GL_POLYGON_OFFSET_LINE,
+                      osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
+    osg::PolygonMode* polygonMode = new osg::PolygonMode;
+    polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
+                         osg::PolygonMode::LINE);
+    static_highlightStateSet->setAttribute(polygonMode, osg::StateAttribute::OVERRIDE);
+    osg::Material* material = new osg::Material;
+    material->setColorMode(osg::Material::OFF);
+    material->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4f(0, 0, 0, 1));
+    // XXX Alpha < 1.0 in the diffuse material value is a signal to the
+    // default shader to take the alpha value from the material value
+    // and not the glColor. In many cases the pick animation geometry is
+    // transparent, so the outline would not be visible without this hack.
+    material->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4f(0, 0, 0, .95));
+    material->setEmission(osg::Material::FRONT_AND_BACK, osg::Vec4f(1, 1, 0, 1));
+    material->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4f(0, 0, 0, 0));
+    static_highlightStateSet->setAttribute(
+                           material, osg::StateAttribute::OVERRIDE | osg::StateAttribute::PROTECTED);
+    // The default shader has a colorMode uniform that mimics the
+    // behavior of Material color mode.
+    osg::Uniform* colorModeUniform = new osg::Uniform(osg::Uniform::INT, "colorMode");
+    colorModeUniform->set(0); // MODE_OFF
+    colorModeUniform->setDataVariance(osg::Object::STATIC);
+    static_highlightStateSet->addUniform(colorModeUniform,
+                         osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);
+  }
   
-   return commonGroup;
+  return static_highlightStateSet.get();
+}
+
+void
+SGPickAnimation::apply(osg::Group& group)
+{
+  if (_objectNames.empty() && _proxyNames.empty()) {
+    return;
+  }
+  
+  group.traverse(*this);
+  
+  // iterate over all group children
+  int i = group.getNumChildren() - 1;
+  for (; 0 <= i; --i) {
+    osg::Node* child = group.getChild(i);
+    if (child->getName().empty()) {
+        continue;
+    }
+      
+    std::list<std::string>::iterator it = std::find(_objectNames.begin(), _objectNames.end(), child->getName());
+    if (it != _objectNames.end()) {
+      _objectNames.erase(it);
+      install(*child);
+      
+      osg::ref_ptr<osg::Group> renderGroup, pickGroup;      
+      osg::Group* mainGroup = createMainGroup(&group);
+      mainGroup->setName(child->getName());
+      child->setName(""); // don't apply other animations twice
+      
+      if (getConfig()->getBoolValue("visible", true)) {
+          renderGroup = new osg::Group;
+          renderGroup->setName("pick render group");
+          renderGroup->addChild(child);
+          mainGroup->addChild(renderGroup);
+      }
+      
+      pickGroup = new osg::Group;
+      pickGroup->setName("pick highlight group");
+      pickGroup->setNodeMask(simgear::PICK_BIT);
+      pickGroup->setStateSet(sharedHighlightStateSet());
+      mainGroup->addChild(pickGroup);
+      
+      setupCallbacks(SGSceneUserData::getOrCreateSceneUserData(pickGroup), mainGroup);
+
+      pickGroup->addChild(child);
+      group.removeChild(child);
+      continue;
+    }
+    
+    string_list::iterator j = std::find(_proxyNames.begin(), _proxyNames.end(), child->getName());
+    if (j == _proxyNames.end()) {
+      continue;
+    }
+    
+    _proxyNames.erase(j);
+    osg::ref_ptr<osg::Group> proxyGroup = new osg::Group;
+    group.addChild(proxyGroup);
+    proxyGroup->setStateSet(sharedHighlightStateSet());
+    proxyGroup->setNodeMask(simgear::PICK_BIT);
+      
+    setupCallbacks(SGSceneUserData::getOrCreateSceneUserData(proxyGroup), proxyGroup);
+    proxyGroup->addChild(child);
+    group.removeChild(child);
+  } // of group children iteration
+}
+
+osg::Group*
+SGPickAnimation::createMainGroup(osg::Group* pr)
+{
+  osg::Group* g = new osg::Group;
+  pr->addChild(g);
+  return g;
+}
+
+void
+SGPickAnimation::setupCallbacks(SGSceneUserData* ud, osg::Group* parent)
+{
+  PickCallback* pickCb = NULL;
+  
+  // add actions that become macro and command invocations
+  std::vector<SGPropertyNode_ptr> actions;
+  actions = getConfig()->getChildren("action");
+  for (unsigned int i = 0; i < actions.size(); ++i) {
+    pickCb = new PickCallback(actions[i], getModelRoot());
+    ud->addPickCallback(pickCb);
+  }
+  
+  if (getConfig()->hasChild("hovered")) {
+    if (!pickCb) {
+      // make a trivial PickCallback to hang the hovered off of
+      SGPropertyNode_ptr dummyNode(new SGPropertyNode);
+      pickCb = new PickCallback(dummyNode.ptr(), getModelRoot());
+      ud->addPickCallback(pickCb);
+    }
+    
+    pickCb->addHoverBindings(getConfig()->getNode("hovered"), getModelRoot());
+  }
+  
+  // Look for the VNC sessions that want raw mouse input
+  actions = getConfig()->getChildren("vncaction");
+  for (unsigned int i = 0; i < actions.size(); ++i) {
+    ud->addPickCallback(new VncCallback(actions[i], getModelRoot(), parent));
+  }
+}
+
+///////////////////////////////////////////////////////////////////////////
+
+// insert count copies of binding list A, into the output list.
+// effectively makes the output list fire binding A multiple times
+// in sequence
+static void repeatBindings(const SGBindingList& a, SGBindingList& out, int count)
+{
+    out.clear();
+    for (int i=0; i<count; ++i) {
+        out.insert(out.end(), a.begin(), a.end());
+    }
+}
+
+static bool static_knobMouseWheelAlternateDirection = false;
+static bool static_knobDragAlternateAxis = false;
+static double static_dragSensitivity = 1.0;
+
+class KnobSliderPickCallback : public SGPickCallback {
+public:
+    enum Direction
+    {
+        DIRECTION_NONE,
+        DIRECTION_INCREASE,
+        DIRECTION_DECREASE
+    };
+    
+    enum DragDirection
+    {
+        DRAG_DEFAULT = 0,
+        DRAG_VERTICAL,
+        DRAG_HORIZONTAL
+    };
+
+    
+    KnobSliderPickCallback(const SGPropertyNode* configNode,
+                 SGPropertyNode* modelRoot) :
+        SGPickCallback(PriorityPanel),
+        _direction(DIRECTION_NONE),
+        _repeatInterval(configNode->getDoubleValue("interval-sec", 0.1)),
+        _dragDirection(DRAG_DEFAULT)
+    {
+        readOptionalBindingList(configNode, modelRoot, "action", _action);
+        readOptionalBindingList(configNode, modelRoot, "increase", _bindingsIncrease);
+        readOptionalBindingList(configNode, modelRoot, "decrease", _bindingsDecrease);
+        
+        readOptionalBindingList(configNode, modelRoot, "release", _releaseAction);
+        readOptionalBindingList(configNode, modelRoot, "hovered", _hover);
+        
+        if (configNode->hasChild("shift-action") || configNode->hasChild("shift-increase") ||
+            configNode->hasChild("shift-decrease"))
+        {
+        // explicit shifted behaviour - just do exactly what was provided
+            readOptionalBindingList(configNode, modelRoot, "shift-action", _shiftedAction);
+            readOptionalBindingList(configNode, modelRoot, "shift-increase", _shiftedIncrease);
+            readOptionalBindingList(configNode, modelRoot, "shift-decrease", _shiftedDecrease);
+        } else {
+            // default shifted behaviour - repeat normal bindings N times.
+            int shiftRepeat = configNode->getIntValue("shift-repeat", 10);
+            repeatBindings(_action, _shiftedAction, shiftRepeat);
+            repeatBindings(_bindingsIncrease, _shiftedIncrease, shiftRepeat);
+            repeatBindings(_bindingsDecrease, _shiftedDecrease, shiftRepeat);
+        } // of default shifted behaviour
+        
+        _dragScale = configNode->getDoubleValue("drag-scale-px", 10.0);
+        std::string dragDir = configNode->getStringValue("drag-direction");
+        if (dragDir == "vertical") {
+            _dragDirection = DRAG_VERTICAL;
+        } else if (dragDir == "horizontal") {
+            _dragDirection = DRAG_HORIZONTAL;
+        }
+      
+        if (configNode->hasChild("cursor")) {
+            _cursorName = configNode->getStringValue("cursor");
+        } else {
+          DragDirection dir = effectiveDragDirection();
+          if (dir == DRAG_VERTICAL) {
+            _cursorName = "drag-vertical";
+          } else if (dir == DRAG_HORIZONTAL) {
+            _cursorName = "drag-horizontal";
+          }
+        }
+    }
+    
+    virtual bool buttonPressed(int button, const osgGA::GUIEventAdapter* ea, const Info&)
+    {        
+        // the 'be nice to Mac / laptop' users option; alt-clicking spins the
+        // opposite direction. Should make this configurable
+        if ((button == 0) && (ea->getModKeyMask() & osgGA::GUIEventAdapter::MODKEY_ALT)) {
+            button = 1;
+        }
+        
+        int increaseMouseWheel = static_knobMouseWheelAlternateDirection ? 3 : 4;
+        int decreaseMouseWheel = static_knobMouseWheelAlternateDirection ? 4 : 3;
+            
+        _direction = DIRECTION_NONE;
+        if ((button == 0) || (button == increaseMouseWheel)) {
+            _direction = DIRECTION_INCREASE;
+        } else if ((button == 1) || (button == decreaseMouseWheel)) {
+            _direction = DIRECTION_DECREASE;
+        } else {
+            return false;
+        }
+        
+        _lastFirePos = eventToWindowCoords(ea);
+    // delay start of repeat, makes dragging more usable
+        _repeatTime = -_repeatInterval;    
+        _hasDragged = false;
+        return true;
+    }
+    
+    virtual void buttonReleased(int keyModState)
+    {
+        // for *clicks*, we only fire on button release
+        if (!_hasDragged) {
+            fire(keyModState & osgGA::GUIEventAdapter::MODKEY_SHIFT, _direction);
+        }
+        
+        fireBindingList(_releaseAction);
+    }
+  
+    DragDirection effectiveDragDirection() const
+    {
+      if (_dragDirection == DRAG_DEFAULT) {
+        // respect the current default settings - this allows runtime
+        // setting of the default drag direction.
+        return static_knobDragAlternateAxis ? DRAG_VERTICAL : DRAG_HORIZONTAL;
+      }
+      
+      return _dragDirection;
+  }
+  
+    virtual void mouseMoved(const osgGA::GUIEventAdapter* ea)
+    {
+        _mousePos = eventToWindowCoords(ea);
+        osg::Vec2d deltaMouse = _mousePos - _lastFirePos;
+        
+        if (!_hasDragged) {
+            
+            double manhattanDist = deltaMouse.x() * deltaMouse.x()  + deltaMouse.y() * deltaMouse.y();
+            if (manhattanDist < 5) {
+                // don't do anything, just input noise
+                return;
+            }
+            
+        // user is dragging, disable repeat behaviour
+            _hasDragged = true;
+        }
+      
+        double delta = (effectiveDragDirection() == DRAG_VERTICAL) ? deltaMouse.y() : deltaMouse.x();
+    // per-animation scale factor lets the aircraft author tune for expectations,
+    // eg heading setting vs 5-state switch.
+    // then we scale by a global sensitivity, which the user can set.
+        delta *= static_dragSensitivity / _dragScale;
+        
+        if (fabs(delta) >= 1.0) {
+            // determine direction from sign of delta
+            Direction dir = (delta > 0.0) ? DIRECTION_INCREASE : DIRECTION_DECREASE;
+            fire(ea->getModKeyMask() & osgGA::GUIEventAdapter::MODKEY_SHIFT, dir);
+            _lastFirePos = _mousePos;
+        }
+    }
+    
+    virtual void update(double dt, int keyModState)
+    {
+        if (_hasDragged) {
+            return;
+        }
+        
+        _repeatTime += dt;
+        while (_repeatInterval < _repeatTime) {
+            _repeatTime -= _repeatInterval;
+            fire(keyModState & osgGA::GUIEventAdapter::MODKEY_SHIFT, _direction);
+        } // of repeat iteration
+    }
+
+    virtual bool hover(const osg::Vec2d& windowPos, const Info& info)
+    {
+        if (_hover.empty()) {
+            return false;
+        }
+       
+        SGPropertyNode_ptr params(new SGPropertyNode);
+        params->setDoubleValue("x", windowPos.x());
+        params->setDoubleValue("y", windowPos.y());
+        fireBindingList(_hover, params.ptr());
+        return true;
+    }
+  
+    void setCursor(const std::string& aName)
+    {
+      _cursorName = aName;
+    }
+  
+    virtual std::string getCursor() const
+    { return _cursorName; }
+  
+private:
+    void fire(bool isShifted, Direction dir)
+    {
+        const SGBindingList& act(isShifted ? _shiftedAction : _action);
+        const SGBindingList& incr(isShifted ? _shiftedIncrease : _bindingsIncrease);
+        const SGBindingList& decr(isShifted ? _shiftedDecrease : _bindingsDecrease);
+        
+        switch (dir) {
+            case DIRECTION_INCREASE:
+                fireBindingListWithOffset(act,  1, 1);
+                fireBindingList(incr);
+                break;
+            case DIRECTION_DECREASE:
+                fireBindingListWithOffset(act, -1, 1);
+                fireBindingList(decr);
+                break;
+            default: break;
+        }
+    }
+    
+    SGBindingList _action, _shiftedAction;
+    SGBindingList _releaseAction;
+    SGBindingList _bindingsIncrease, _shiftedIncrease,
+        _bindingsDecrease, _shiftedDecrease;
+    SGBindingList _hover;
+    
+        
+    Direction _direction;
+    double _repeatInterval;
+    double _repeatTime;
+    
+    DragDirection _dragDirection;
+    bool _hasDragged; ///< has the mouse been dragged since the press?
+    osg::Vec2d _mousePos, ///< current window coords location of the mouse
+        _lastFirePos; ///< mouse location where we last fired the bindings
+    double _dragScale;
+  
+    std::string _cursorName;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+class SGKnobAnimation::UpdateCallback : public osg::NodeCallback {
+public:
+    UpdateCallback(SGExpressiond const* animationValue) :
+        _animationValue(animationValue)
+    {
+        setName("SGKnobAnimation::UpdateCallback");
+    }
+    virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
+    {
+        SGRotateTransform* transform = static_cast<SGRotateTransform*>(node);
+        transform->setAngleDeg(_animationValue->getValue());
+        traverse(node, nv);
+    }
+    
+private:
+    SGSharedPtr<SGExpressiond const> _animationValue;
+};
+
+
+SGKnobAnimation::SGKnobAnimation(const SGPropertyNode* configNode,
+                                 SGPropertyNode* modelRoot) :
+    SGPickAnimation(configNode, modelRoot)
+{
+    SGSharedPtr<SGExpressiond> value = read_value(configNode, modelRoot, "-deg",
+                                                  -SGLimitsd::max(), SGLimitsd::max());
+    _animationValue = value->simplify();
+    
+    
+    readRotationCenterAndAxis(configNode, _center, _axis);
+}
+
+osg::Group*
+SGKnobAnimation::createMainGroup(osg::Group* pr)
+{  
+  SGRotateTransform* transform = new SGRotateTransform();
+  
+  UpdateCallback* uc = new UpdateCallback(_animationValue);
+  transform->setUpdateCallback(uc);
+  transform->setCenter(_center);
+  transform->setAxis(_axis);
+  
+  pr->addChild(transform);
+  return transform;
+}
+
+void
+SGKnobAnimation::setupCallbacks(SGSceneUserData* ud, osg::Group*)
+{
+  ud->setPickCallback(new KnobSliderPickCallback(getConfig(), getModelRoot()));
+}
+
+void SGKnobAnimation::setAlternateMouseWheelDirection(bool aToggle)
+{
+    static_knobMouseWheelAlternateDirection = aToggle;
+}
+
+void SGKnobAnimation::setAlternateDragAxis(bool aToggle)
+{
+    static_knobDragAlternateAxis = aToggle;
+}
+
+void SGKnobAnimation::setDragSensitivity(double aFactor)
+{
+    static_dragSensitivity = aFactor;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+class SGSliderAnimation::UpdateCallback : public osg::NodeCallback {
+public:
+    UpdateCallback(SGExpressiond const* animationValue) :
+    _animationValue(animationValue)
+    {
+        setName("SGSliderAnimation::UpdateCallback");
+    }
+    virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
+    {
+        SGTranslateTransform* transform = static_cast<SGTranslateTransform*>(node);
+        transform->setValue(_animationValue->getValue());
+
+        traverse(node, nv);
+    }
+    
+private:
+    SGSharedPtr<SGExpressiond const> _animationValue;
+};
+
+
+SGSliderAnimation::SGSliderAnimation(const SGPropertyNode* configNode,
+                                 SGPropertyNode* modelRoot) :
+    SGPickAnimation(configNode, modelRoot)
+{
+    SGSharedPtr<SGExpressiond> value = read_value(configNode, modelRoot, "-m",
+                                                  -SGLimitsd::max(), SGLimitsd::max());
+    _animationValue = value->simplify();
+    
+    _axis = readTranslateAxis(configNode);
+}
+
+osg::Group*
+SGSliderAnimation::createMainGroup(osg::Group* pr)
+{  
+  SGTranslateTransform* transform = new SGTranslateTransform();
+  
+  UpdateCallback* uc = new UpdateCallback(_animationValue);
+  transform->setUpdateCallback(uc);
+  transform->setAxis(_axis);
+  
+  pr->addChild(transform);
+  return transform;
+}
+
+void
+SGSliderAnimation::setupCallbacks(SGSceneUserData* ud, osg::Group*)
+{
+  ud->setPickCallback(new KnobSliderPickCallback(getConfig(), getModelRoot()));
 }
-  
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