Collaboration diagram for osgEarth::Util::Controls::ControlNode:

Classes
struct	PerViewData
Public Member Functions
	ControlNode (Control *control, float priority=0.0f)
Control *	getControl () const
float	getPriority () const
optional< osg::Vec2f > &	anchorPoint ()
const optional< osg::Vec2f > &	anchorPoint () const
virtual void	traverse (osg::NodeVisitor &nv)
virtual osg::BoundingSphere	computeBound () const
Protected Types
typedef std::map< osg::View *, PerViewData >	PerViewDataMap
Protected Member Functions
PerViewData &	getData (osg::View *view)
Protected Attributes
PerViewDataMap	_perViewData
osg::ref_ptr< Control >	_control
float	_priority
optional< osg::Vec2f >	_anchor
Friends
class	ControlNodeBin

Detailed Description

A control wrapped in a node that you can place anywhere in the scene graph. Its scene location will control its 2D screen position, and it can participate in conflict resolution.

Definition at line 571 of file Controls.

Member Typedef Documentation

typedef std::map<osg::View*,PerViewData> osgEarth::Util::Controls::ControlNode::PerViewDataMap [protected]

Definition at line 606 of file Controls.

Constructor & Destructor Documentation

ControlNode::ControlNode	(	Control *	control,
		float	priority = `0.0f`
	)

Constructs a new control node with an embedded control.

Definition at line 1809 of file Controls.cpp.

                                                           :
_control ( control ),
_priority( priority )
{
    setCullingActive( false );
}

Member Function Documentation

optional<osg::Vec2f>& osgEarth::Util::Controls::ControlNode::anchorPoint ( ) [inline]

The point (in screen-space, relative to the lower-left of the control) that should anchor to the scene

Definition at line 584 of file Controls.

{ return _anchor; }

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const optional<osg::Vec2f>& osgEarth::Util::Controls::ControlNode::anchorPoint ( ) const [inline]

Definition at line 585 of file Controls.

{ return _anchor; }

osg::BoundingSphere ControlNode::computeBound ( ) const [virtual]

Definition at line 1817 of file Controls.cpp.

{
    return osg::BoundingSphere( osg::Vec3(0,0,0), 0.5 );
}

Control* osgEarth::Util::Controls::ControlNode::getControl ( ) const [inline]

The control encaspulated in this node

Definition at line 578 of file Controls.

{ return _control.get(); }

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PerViewData& osgEarth::Util::Controls::ControlNode::getData ( osg::View * view ) [inline, protected]

Definition at line 613 of file Controls.

{ return _perViewData[view]; }

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float osgEarth::Util::Controls::ControlNode::getPriority ( ) const [inline]

The draw priority of this control

Definition at line 581 of file Controls.

{ return _priority; }

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void ControlNode::traverse ( osg::NodeVisitor & nv ) [virtual]

Definition at line 1823 of file Controls.cpp.

{
    if ( nv.getVisitorType() == osg::NodeVisitor::CULL_VISITOR )
    {
        static osg::Vec3d s_zero(0,0,0);
        static osg::Vec4d s_zero_w(0,0,0,1);
        osgUtil::CullVisitor* cv = static_cast<osgUtil::CullVisitor*>( &nv );

        //setCullingActive( true );
        //cv->setSmallFeatureCullingPixelSize(0);

        // pull up the per-view data for this view:
        PerViewData& data = _perViewData[cv->getCurrentCamera()->getView()];

        // if it's uninitialized, find the corresponding control canvas and 
        // cache a reference to its control node bin:
        if ( !data._canvas.valid() )
        {
            data._canvas = ControlCanvas::get( cv->getCurrentCamera()->getView(), true );
            if ( data._canvas.valid() )
            {
                ControlNodeBin* bin = static_cast<ControlCanvas*>(data._canvas.get())->getControlNodeBin();
                bin->addNode( this );
            }
        }

        if ( data._canvas.valid() )
        {
            // calculate its screen position:
            //data._screenPos = s_zero * (*cv->getMVPW());

            osg::Vec4d clip = s_zero_w * (*cv->getModelViewMatrix()) * (*cv->getProjectionMatrix());
            osg::Vec3d clip_ndc( clip.x()/clip.w(), clip.y()/clip.w(), clip.z()/clip.w() );
            data._screenPos = clip_ndc * cv->getWindowMatrix();

            if ( clip_ndc.z() > 1.0 ) // node is behind the near clip plane
            {
                data._obscured = true;
            }
            else if ( data._obscured == true )
            {
                data._obscured = false;
                data._visibleTime = cv->getFrameStamp()->getReferenceTime();
            }
        }

        data._visitFrame = cv->getFrameStamp()->getFrameNumber();
    }

    // ControlNode has no children, so no point in calling traverse.
    osg::Node::traverse(nv);
}