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Charts Package API Reference Guide

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IlvRectangularGridDisplayer Class Reference

Grid displayer subclass for Cartesian charts. More...

#include <ilviews/charts/grid.h>

Inheritance diagram for IlvRectangularGridDisplayer:
IlvAbstractGridDisplayer

Public Member Functions

 IlvRectangularGridDisplayer (IlvPalette *major=0, IlvPalette *minor=0)
 Constructor. More...
 
virtual IlvCircularGridDisplayercreateCircularGrid (IlvCircularScaleDisplayer *ref) const
 Creates a circular grid instantiated with the current grid parameters and returns it. More...
 
virtual IlvRadialGridDisplayercreateRadialGrid () 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 IlvAbstractGridDisplayercopy () const =0
 Virtual copy constructor. More...
 
void drawMinorLines (IlBoolean flag)
 Specifies that the minor lines are drawn. More...
 
IlvPalettegetDefaultPalette () const
 Returns the palette used by default. More...
 
IlvDrawOrder getDrawOrder () const
 Returns the drawing order for the current grid. More...
 
IlvPalettegetMajorPalette () const
 Returns the palette for the major lines. More...
 
IlvPalettegetMinorPalette () const
 Returns the palette for the minor lines. More...
 
const IlvAbstractProjectorgetProjector () const
 Returns the object used to project the data into screen coordinates. More...
 
const IlvSingleScaleDisplayergetTickScale () 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...
 
IlvOutputFilesave (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 IlvAbstractGridDisplayerLoad (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 ( 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
majorThe new palette that will be used to draw the major lines of the current grid.
minorThe new palette that will be used to draw the minor lines of the current grid.

Member Function Documentation

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.
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.
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
tickIdxThe index of the tick on the scale to which the grid is attached.
tickPointThe position in pixels of the scale tick for which the grid line is drawn. This point is already transformed.
tickAngleThe angle of the scale tick for which the grid line is drawn.
majorA Boolean value indicating whether the tick is a major step or a substep.
dstThe port where the grid line is drawn.
clipThe 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.


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