Inheritance diagram for osgEarth::Util::Controls::LabelControl:

Collaboration diagram for osgEarth::Util::Controls::LabelControl:

Public Member Functions
	LabelControl (const std::string &value="", float fontSize=18.0f, const osg::Vec4f &foreColor=osg::Vec4f(1, 1, 1, 1))
	LabelControl (const std::string &value, const osg::Vec4f &foreColor)
void	setText (const std::string &value)
const std::string &	text () const
void	setFont (osgText::Font *font)
osgText::Font *	font () const
void	setFontSize (float value)
float	fontSize () const
void	setHaloColor (const osg::Vec4f &value)
const optional< osg::Vec4f > &	haloColor () const
virtual void	calcSize (const ControlContext &context, osg::Vec2f &out_size)
virtual void	draw (const ControlContext &context, DrawableList &out_drawables)
Private Attributes
std::string	_text
osg::ref_ptr< osgText::Font >	_font
float	_fontSize
osg::ref_ptr< osgText::Text >	_drawable
osg::Vec3	_bmin
osg::Vec3	_bmax
optional< osg::Vec4f >	_haloColor

Detailed Description

Control that contains a text string, obviously

Definition at line 264 of file Controls.

Constructor & Destructor Documentation

LabelControl::LabelControl	(	const std::string &	value = `""`,
		float	fontSize = `18.0f`,
		const osg::Vec4f &	foreColor = `osg::Vec4f(1,1,1,1)`
	)

Definition at line 466 of file Controls.cpp.

{
    setText( text );
    setFont( osgText::readFontFile( "arial.ttf" ) ); // TODO: cache this?
    setFontSize( fontSize );
    setBackColor( osg::Vec4f(0,0,0,0) );
    setForeColor( foreColor );
}

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LabelControl::LabelControl	(	const std::string &	value,
		const osg::Vec4f &	foreColor
	)

Definition at line 477 of file Controls.cpp.

{
    setText( text );
    setFont( osgText::readFontFile( "arial.ttf" ) ); // TODO: cache this?
    setFontSize( 18.0f );
    setBackColor( osg::Vec4f(0,0,0,0) );
    setForeColor( foreColor );
}

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Member Function Documentation

void LabelControl::calcSize	(	const ControlContext &	context,
		osg::Vec2f &	out_size
	)		`[virtual]`

Reimplemented from osgEarth::Util::Controls::Control.

Definition at line 524 of file Controls.cpp.

{
    if ( visible() == true )
    {
        // we have to create the drawable during the layout pass so we can calculate its size.
        LabelText* t = new LabelText();

#if 1
        // needs a special shader
        // todo: doesn't work. why?
        osg::Program* program = new osg::Program();
        program->addShader( new osg::Shader( osg::Shader::VERTEX, s_controlVertexShader ) );
        program->addShader( new osg::Shader( osg::Shader::FRAGMENT, s_labelControlFragmentShader ) );
        t->getOrCreateStateSet()->setAttributeAndModes( program, osg::StateAttribute::ON );
#endif

        t->setText( _text );
        // yes, object coords. screen coords won't work becuase the bounding box will be wrong.
        t->setCharacterSizeMode( osgText::Text::OBJECT_COORDS );
        t->setCharacterSize( _fontSize );
        // always align to top. layout alignment gets calculated layer in Control::calcPos().
        t->setAlignment( osgText::Text::LEFT_TOP ); 
        t->setColor( foreColor().value() );
        if ( _font.valid() )
            t->setFont( _font.get() );

        if ( haloColor().isSet() )
        {
            t->setBackdropType( osgText::Text::OUTLINE );
            t->setBackdropOffset( 0.03 );
            t->setBackdropColor( haloColor().value() );
        }

        osg::BoundingBox bbox = t->getTextBB();
        if ( cx._viewContextID != ~0u )
        {
            //the Text's autoTransformCache matrix puts some mojo on the bounding box
            osg::Matrix m = t->getATMatrix( cx._viewContextID );
            _bmin = osg::Vec3( bbox.xMin(), bbox.yMin(), bbox.zMin() ) * m;
            _bmax = osg::Vec3( bbox.xMax(), bbox.yMax(), bbox.zMax() ) * m;
        }
        else
        {
            _bmin = osg::Vec3( bbox.xMin(), bbox.yMin(), bbox.zMin() );
            _bmax = osg::Vec3( bbox.xMax(), bbox.yMax(), bbox.zMax() );
        }

        _renderSize.set(
            (_bmax.x() - _bmin.x()) + padding().x(),
            (_bmax.y() - _bmin.y()) + padding().y() );

        _drawable = t;

        out_size.set(
            margin().x() + _renderSize.x(),
            margin().y() + _renderSize.y() );
    }
    else
    {
        out_size.set(0,0);
    }

    //_dirty = false;
}

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void LabelControl::draw	(	const ControlContext &	context,
		DrawableList &	out_drawables
	)		`[virtual]`

Reimplemented from osgEarth::Util::Controls::Control.

Definition at line 590 of file Controls.cpp.

{
    if ( _drawable.valid() && visible() == true )
    {
        Control::draw( cx, out );

        float vph = cx._vp->height(); // - padding().bottom();

        LabelText* t = static_cast<LabelText*>( _drawable.get() );
        osg::BoundingBox bbox = t->getTextBB();
        t->setPosition( osg::Vec3( _renderPos.x(), vph - _renderPos.y(), 0 ) );
        out.push_back( _drawable.get() );
    }
}

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osgText::Font* osgEarth::Util::Controls::LabelControl::font ( ) const [inline]

Definition at line 280 of file Controls.

{ return _font.get(); }

float osgEarth::Util::Controls::LabelControl::fontSize ( ) const [inline]

Definition at line 283 of file Controls.

{ return _fontSize; }

const optional<osg::Vec4f>& osgEarth::Util::Controls::LabelControl::haloColor ( ) const [inline]

Definition at line 286 of file Controls.

{ return _haloColor; }

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void LabelControl::setFont ( osgText::Font * font )

Definition at line 497 of file Controls.cpp.

{
    if ( value != _font.get() ) {
        _font = value;
        dirty();
    }
}

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void LabelControl::setFontSize ( float value )

Definition at line 506 of file Controls.cpp.

{
    if ( value != _fontSize ) {
        _fontSize = value;
        dirty();
    }
}

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void LabelControl::setHaloColor ( const osg::Vec4f & value )

Definition at line 515 of file Controls.cpp.

{
    if ( !_haloColor.isSet() || *_haloColor != value ) {
        _haloColor = value;
        dirty();
    }
}

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void LabelControl::setText ( const std::string & value )

Definition at line 488 of file Controls.cpp.

{
    if ( value != _text ) {
        _text = value;
        dirty();
    }
}

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const std::string& osgEarth::Util::Controls::LabelControl::text ( ) const [inline]

Definition at line 277 of file Controls.

{ return _text; }

Member Data Documentation

osg::Vec3 osgEarth::Util::Controls::LabelControl::_bmax [private]

Definition at line 298 of file Controls.

osg::Vec3 osgEarth::Util::Controls::LabelControl::_bmin [private]

Definition at line 298 of file Controls.

osg::ref_ptr<osgText::Text> osgEarth::Util::Controls::LabelControl::_drawable [private]

Definition at line 297 of file Controls.

osg::ref_ptr<osgText::Font> osgEarth::Util::Controls::LabelControl::_font [private]

Definition at line 295 of file Controls.

float osgEarth::Util::Controls::LabelControl::_fontSize [private]

Definition at line 296 of file Controls.

optional<osg::Vec4f> osgEarth::Util::Controls::LabelControl::_haloColor [private]

Definition at line 299 of file Controls.

std::string osgEarth::Util::Controls::LabelControl::_text [private]

Definition at line 294 of file Controls.

The documentation for this class was generated from the following files:

/home/cube/sources/osgearth/src/osgEarthUtil/Controls
/home/cube/sources/osgearth/src/osgEarthUtil/Controls.cpp

osgEarth::Util::Controls::LabelControl Class Reference

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation