IlvRectangularGridDisplayer Class Reference

Grid displayer subclass for Cartesian charts. More...

#include <ilviews/charts/grid.h>

Inheritance diagram for IlvRectangularGridDisplayer:

Public Member Functions
	IlvRectangularGridDisplayer (IlvPalette *major=0, IlvPalette *minor=0)
	Constructor. More...
virtual IlvCircularGridDisplayer *	createCircularGrid (IlvCircularScaleDisplayer *ref) const
	Creates a circular grid instantiated with the current grid parameters and returns it. More...
virtual IlvRadialGridDisplayer *	createRadialGrid () const
	Creates a radial grid instantiated with the current grid parameters and returns it. More...
virtual void	drawTick (IlUInt tickIdx, const IlvPoint &tickPoint, IlDouble tickAngle, IlBoolean major, IlvPort *dst, const IlvRegion *givenClip) const
	Draws the grid line for a given tick of the scale with which the grid is associated. More...
Public Member Functions inherited from IlvAbstractGridDisplayer
virtual	~IlvAbstractGridDisplayer ()
	Destructor. More...
virtual IlvAbstractGridDisplayer *	copy () const =0
	Virtual copy constructor. More...
void	drawMinorLines (IlBoolean flag)
	Specifies that the minor lines are drawn. More...
IlvPalette *	getDefaultPalette () const
	Returns the palette used by default. More...
IlvDrawOrder	getDrawOrder () const
	Returns the drawing order for the current grid. More...
IlvPalette *	getMajorPalette () const
	Returns the palette for the major lines. More...
IlvPalette *	getMinorPalette () const
	Returns the palette for the minor lines. More...
const IlvAbstractProjector *	getProjector () const
	Returns the object used to project the data into screen coordinates. More...
const IlvSingleScaleDisplayer *	getTickScale () const
	Returns the scale with which the current grid is associated. More...
IlBoolean	isDrawingMinorLines () const
	Indicates whether the minor lines are drawn. More...
IlBoolean	isVisible () const
	Indicates whether the current grid is visible. More...
IlvOutputFile &	save (IlvOutputFile &file) const
	Writes a complete description of the current object in a file. More...
void	setDrawOrder (IlvDrawOrder drawOrder)
	Sets the drawing order for the current grid. More...
void	setMajorPalette (IlvPalette *pal)
	Sets the palette for the major lines. More...
void	setMinorPalette (IlvPalette *pal)
	Sets the palette for the minor lines. More...
virtual void	setMode (IlvDrawMode mode)
	Sets the drawing mode. More...
virtual void	setOverwrite (IlBoolean o)
	Sets the way the drawing member functions operate. More...
void	setVisible (IlBoolean visible)
	Specifies whether the current grid is visible. More...
virtual void	write (IlvOutputFile &file) const
	Writes the attributes of the current object in a file. More...

Additional Inherited Members
Static Public Member Functions inherited from IlvAbstractGridDisplayer
static IlvAbstractGridDisplayer *	Load (IlvInputFile &file)
	Reads a grid object from a file. More...
Protected Member Functions inherited from IlvAbstractGridDisplayer
	IlvAbstractGridDisplayer (IlvPalette *major=0, IlvPalette *minor=0)
	Constructor. More...
	IlvAbstractGridDisplayer (const IlvAbstractGridDisplayer &grid)
	Constructor. More...
	IlvAbstractGridDisplayer (IlvInputFile &file)
	Constructor. More...

Detailed Description

Grid displayer subclass for Cartesian charts.

Library: ilvcharts

This class is a subclass of IlvAbstractGridDisplayer that allows you to define a rectangular grid composed of straight lines. This kind of grid is used only for Cartesian charts. A Cartesian chart is a chart that displays data expressed in Cartesian coordinates with abscissa and ordinate scales that are orthogonal.

The scales of a Cartesian chart are drawn using instances of the IlvRectangularScaleDisplayer class. Therefore, the rectangular grid can be used only with an IlvRectangularScaleDisplayer object and when the projector used to project the data is an IlvCartesianProjector object.

You can see an example of rectangular grids on the figure below where a grid is set for each of the scales of the displayed chart.

See also

IlvAbstractGridDisplayer.

Constructor & Destructor Documentation

IlvRectangularGridDisplayer()

IlvRectangularGridDisplayer::IlvRectangularGridDisplayer	(	IlvPalette *	major = 0,
		IlvPalette *	minor = 0
	)

Constructor.

Initializes a new IlvRectangularGridDisplayer object. To do this, the constructor calls the corresponding constructor IlvAbstractGridDisplayer::IlvAbstractGridDisplayer(IlvPalette*, IlvPalette*) of its parent class.

Parameters

major	The new palette that will be used to draw the major lines of the current grid.
minor	The new palette that will be used to draw the minor lines of the current grid.

Member Function Documentation

createCircularGrid()

virtual IlvCircularGridDisplayer* IlvRectangularGridDisplayer::createCircularGrid ( IlvCircularScaleDisplayer *  ref ) const

virtual

Creates a circular grid instantiated with the current grid parameters and returns it.

Returns

The circular grid that is created.

createRadialGrid()

virtual IlvRadialGridDisplayer* IlvRectangularGridDisplayer::createRadialGrid ( ) const

virtual

Creates a radial grid instantiated with the current grid parameters and returns it.

Returns

The radial grid that is created.

drawTick()

virtual void IlvRectangularGridDisplayer::drawTick ( IlUInt  tickIdx, const IlvPoint &  tickPoint, IlDouble  tickAngle, IlBoolean  major, IlvPort *  dst, const IlvRegion *  clip  ) const

virtual

Draws the grid line for a given tick of the scale with which the grid is associated.

Draws the grid line for the scale tick of index tickIdx, defined by the point tickPoint, which is its position in pixels, and by its angle tickAngle.

The grid line is drawn in the given port named dst using the clipping region clip.

Parameters

tickIdx	The index of the tick on the scale to which the grid is attached.
tickPoint	The position in pixels of the scale tick for which the grid line is drawn. This point is already transformed.
tickAngle	The angle of the scale tick for which the grid line is drawn.
major	A Boolean value indicating whether the tick is a major step or a substep.
dst	The port where the grid line is drawn.
clip	The clipping region.

Note

This method is called inside the IlvSingleScaleDisplayer::drawTick() method. Therefore, the grid line is drawn when the scale tick is drawn.

The data display area is automatically set by the scale with the IlvAbstractGridDisplayer::setDataDisplayArea() method before the grid lines are drawn. This area can therefore be fetched with the IlvAbstractGridDisplayer::getDataDisplayArea() method.

Implements IlvAbstractGridDisplayer.