CDPL::Vis::QtRenderer2D Class Reference

Implements the Renderer2D interface on top of the Qt Toolkit. More...

#include <QtRenderer2D.hpp>

Inheritance diagram for CDPL::Vis::QtRenderer2D:

Public Member Functions
	QtRenderer2D (QPainter &painter)
	Constructs a renderer object which uses the QPainter instance painter for its drawing operations. More...
	~QtRenderer2D ()
	Destructor. More...
void	saveState ()
	Saves the current renderer state. More...
void	restoreState ()
	Restores the last renderer state saved by a call to saveState(). More...
void	setTransform (const Math::Matrix3D &xform)
	Sets the applied affine transformation matrix to xform. More...
void	transform (const Math::Matrix3D &xform)
	Multiplies the current affine transformation matrix by xform. More...
void	setPen (const Pen &pen)
	Sets the pen to be used in subsequent drawing operations. More...
void	setBrush (const Brush &brush)
	Sets the brush to be used in subsequent drawing operations. More...
void	setFont (const Font &font)
	Sets the font to be used in subsequent text drawing operations. More...
void	drawRectangle (double x1, double y1, double x2, double y2)
	Draws an axis aligned rectangle of the specified width and height whose upper-left corner is located at (x, y). More...
void	drawPolygon (const Math::Vector2DArray &points)
	Draws the polygon defined by points. More...
void	drawLine (double x1, double y1, double x2, double y2)
	Draws a line segment from (x1, y1) to (x2, y2). More...
void	drawPolyline (const Math::Vector2DArray &points)
	Draws the polyline defined by points. More...
void	drawLineSegments (const Math::Vector2DArray &points)
	Draws the sequence of disjoint line segments defined by points. More...
void	drawPoint (double x, double y)
	Draws a point at the position (x, y). More...
void	drawText (double x, double y, const std::string &txt)
	Draws the specified text at the position (x, y). More...
void	drawEllipse (double x, double y, double width, double height)
	Draws an ellipse with the given width and height around the center position (x, y). More...
void	drawPath (const Path2D &path)
	Draws the given path. More...
void	setClipPath (const Path2D &path)
void	clearClipPath ()
	Disables clipping. More...
Public Member Functions inherited from CDPL::Vis::Renderer2D
virtual	~Renderer2D ()
	Virtual destructor. More...

Detailed Description

Implements the Renderer2D interface on top of the Qt Toolkit.

QtRenderer2D is implemented by forwarding the drawing operations to a provided QPainter instance which has been created for the desired output device (screen, printer, off-screen image, ...). For more information about QPainter and the Qt Toolkit see [QTDOC].

Constructor & Destructor Documentation

QtRenderer2D()

CDPL::Vis::QtRenderer2D::QtRenderer2D

(

QPainter &

painter

)

Constructs a renderer object which uses the QPainter instance painter for its drawing operations.

Parameters

painter

The wrapped QPainter instance.

~QtRenderer2D()

CDPL::Vis::QtRenderer2D::~QtRenderer2D

(

)

Destructor.

Member Function Documentation

saveState()

void CDPL::Vis::QtRenderer2D::saveState ( )

virtual

Saves the current renderer state.

The method saves the current pen, brush, font and transformation matrix on an internal stack. The last saved state can be restored later on by a call to restoreState().

See also

restoreState()

Implements CDPL::Vis::Renderer2D.

restoreState()

void CDPL::Vis::QtRenderer2D::restoreState ( )

virtual

Restores the last renderer state saved by a call to saveState().

See also

saveState()

Implements CDPL::Vis::Renderer2D.

setTransform()

void CDPL::Vis::QtRenderer2D::setTransform ( const Math::Matrix3D &  xform )

virtual

Sets the applied affine transformation matrix to xform.

Parameters

xform

The new affine transformation matrix.

Implements CDPL::Vis::Renderer2D.

transform()

void CDPL::Vis::QtRenderer2D::transform ( const Math::Matrix3D &  xform )

virtual

Multiplies the current affine transformation matrix by xform.

Parameters

xform

The matrix by which the current affine transformation matrix is multiplied.

Implements CDPL::Vis::Renderer2D.

setPen()

void CDPL::Vis::QtRenderer2D::setPen ( const Pen &  pen )

virtual

Sets the pen to be used in subsequent drawing operations.

Parameters

pen	The new pen for subsequent drawing operations.

See also

Vis::Pen

Implements CDPL::Vis::Renderer2D.

setBrush()

void CDPL::Vis::QtRenderer2D::setBrush ( const Brush &  brush )

virtual

Sets the brush to be used in subsequent drawing operations.

Parameters

brush

The new brush for subsequent drawing operations.

See also

Vis::Brush

Implements CDPL::Vis::Renderer2D.

setFont()

void CDPL::Vis::QtRenderer2D::setFont ( const Font &  font )

virtual

Sets the font to be used in subsequent text drawing operations.

Parameters

font	The new font used in subsequent text drawing operations.

See also

Vis::Font

Implements CDPL::Vis::Renderer2D.

drawRectangle()

void CDPL::Vis::QtRenderer2D::drawRectangle ( double  x, double  y, double  width, double  height  )

virtual

Draws an axis aligned rectangle of the specified width and height whose upper-left corner is located at (x, y).

The rectangle is filled as specified by the current brush and the outline will be drawn as specified by the current pen.

Parameters

x	The x-coordinate of the upper-left corner.
y	The y-coordinate of the upper-left corner.
width	The width of the rectangle.
height	The height of the rectangle.

See also

setPen(), setBrush()

Implements CDPL::Vis::Renderer2D.

drawPolygon()

void CDPL::Vis::QtRenderer2D::drawPolygon ( const Math::Vector2DArray &  points )

virtual

Draws the polygon defined by points.

For a given set of \( N \) corner points \( p_i \) with \( i = 1, 2, \ldots, N \), the polygon's \( N \) edges are given by \( (p_1, p_2), (p_2, p_3), \ldots, (p_N, p_0) \). The polygon is filled as specified by the current brush and the outline will be drawn as specified by the current pen.

Parameters

points

An array of points specifying the corners of the polygon.

See also

setPen(), setBrush()

Implements CDPL::Vis::Renderer2D.

drawLine()

void CDPL::Vis::QtRenderer2D::drawLine ( double  x1, double  y1, double  x2, double  y2  )

virtual

Draws a line segment from (x1, y1) to (x2, y2).

The line style, color, cap style and line width is specified by the current pen.

Parameters

x1	The x-coordinate of the starting point.
y1	The y-coordinate of the starting point.
x2	The x-coordinate of the end point.
y2	The y-coordinate of the end point.

See also

setPen()

Implements CDPL::Vis::Renderer2D.

drawPolyline()

void CDPL::Vis::QtRenderer2D::drawPolyline ( const Math::Vector2DArray &  points )

virtual

Draws the polyline defined by points.

For a given set of \( N \) points \( p_i \) with \( i = 1, 2, \ldots, N \), \( N - 1 \) connected line segments \( (p_1, p_2), (p_2, p_3), \ldots, (p_{N - 1}, p_N) \) will be drawn. The line style, color, cap style, join style and line width is specified by the current pen.

Parameters

points

An array of points defining the polyline.

See also

setPen()

Implements CDPL::Vis::Renderer2D.

drawLineSegments()

void CDPL::Vis::QtRenderer2D::drawLineSegments ( const Math::Vector2DArray &  points )

virtual

Draws the sequence of disjoint line segments defined by points.

For a given set of \( 2N \) points \( p_i \) with \( i = 1, 2, \ldots, 2N \), \( N \) disjoint line segments \( (p_1, p_2), (p_3, p_4), \ldots, (p_{2N - 1}, p_2N) \) will be drawn. The line style, color, cap style and line width is specified by the current pen.

Parameters

points

An array of points defining the line segments.

See also

setPen()

Implements CDPL::Vis::Renderer2D.

drawPoint()

void CDPL::Vis::QtRenderer2D::drawPoint ( double  x, double  y  )

virtual

Draws a point at the position (x, y).

The diameter and color of the point is specified by the current pen.

Parameters

x	The x-coordinate of the point.
y	The y-coordinate of the point.

See also

setPen()

Implements CDPL::Vis::Renderer2D.

drawText()

void CDPL::Vis::QtRenderer2D::drawText ( double  x, double  y, const std::string &  txt  )

virtual

Draws the specified text at the position (x, y).

The text color is specified by the current pen. The font has to be specified by setFont().

Parameters

x	The x-position of the drawn text.
y	The y-position of the baseline.
txt	The text to draw.

See also

setPen(), setFont()

Implements CDPL::Vis::Renderer2D.

drawEllipse()

void CDPL::Vis::QtRenderer2D::drawEllipse ( double  x, double  y, double  width, double  height  )

virtual

Draws an ellipse with the given width and height around the center position (x, y).

The ellipse is filled as specified by the current brush and the outline will be drawn as specified by the current pen.

Parameters

x	The x-coordinate of the center point.
y	The y-coordinate of the center point.
width	The width of the ellipse.
height	The height of the ellipse.

See also

setPen(), setBrush()

Implements CDPL::Vis::Renderer2D.

drawPath()

void CDPL::Vis::QtRenderer2D::drawPath ( const Path2D &  path )

virtual

Draws the given path.

The path is filled as specified by the current brush and the outline will be drawn as specified by the current pen.

Parameters

path	The path to draw.

See also

setPen(), setBrush()

Implements CDPL::Vis::Renderer2D.

setClipPath()

void CDPL::Vis::QtRenderer2D::setClipPath ( const Path2D &  path )

virtual

Implements CDPL::Vis::Renderer2D.

clearClipPath()

void CDPL::Vis::QtRenderer2D::clearClipPath ( )

virtual

Disables clipping.

Implements CDPL::Vis::Renderer2D.

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

• QtRenderer2D.hpp