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Grid displayer subclass for ordinate scales of radar charts. More...
#include <ilviews/charts/grid.h>
Public Member Functions | |
IlvRadarGridDisplayer (IlvCircularScaleDisplayer *ref, IlvPalette *major=0, IlvPalette *minor=0) | |
Constructor. | |
virtual IlvAbstractGridDisplayer * | copy () const |
Virtual copy constructor. | |
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. |
Grid displayer subclass for ordinate scales of radar charts.
Library: ilvcharts
This class is a subclass of IlvCircularGridDisplayer
that allows you to define a dedicated grid for the ordinate scales of radar charts.
You can see an example of a radar grid in the figure below where a grid is set for the ordinate scale of the displayed chart.
IlvCircularScaleDisplayer
. IlvRadarGridDisplayer::IlvRadarGridDisplayer | ( | IlvCircularScaleDisplayer * | ref, | |
IlvPalette * | major = 0 , |
|||
IlvPalette * | minor = 0 | |||
) |
Constructor.
Initializes a new IlvRadarGridDisplayer
object. By default, the scale with which the current grid is associated is set to 0
. The Boolean indicating that the grid is visible is set to IlTrue
. The Boolean indicating that the minor lines are drawn is set to IlFalse
, meaning that by default only the major lines will be drawn. The drawing order is set to IlvDrawAbove
, specifying that the grid is drawn above the graphic representations of data in the chart.
ref | The circular scale used as the reference scale to bound the grid lines. | |
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. |
virtual IlvAbstractGridDisplayer* IlvRadarGridDisplayer::copy | ( | ) | const [virtual] |
Virtual copy constructor.
Creates and returns a copy of the current object. This method must be overloaded in subclasses. It is automatically declared by the DeclareGridDisplayerTypeInfo
macro. The IlvPredefinedGridDisplayerIOMembers
macro lets you define a default implementation, which returns an instance initialized with the copy constructor.
Implements IlvAbstractGridDisplayer.
virtual void IlvRadarGridDisplayer::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.
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. |
IlvSingleScaleDisplayer::drawTick
method. Therefore, the grid line is drawn when the scale tick is drawn.IlvAbstractGridDisplayer::setDataDisplayArea
method before the grid lines are drawn. This area can therefore be fetched with the IlvAbstractGridDisplayer::getDataDisplayArea
method. Reimplemented from IlvCircularGridDisplayer.
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