KChart::AbstractGrid Class Reference

#include <KChartAbstractGrid.h>

Inheritance diagram for KChart::AbstractGrid:

Public Member Functions
virtual void	drawGrid (PaintContext *context)=0
void	setNeedRecalculate ()
DataDimensionsList	updateData (AbstractCoordinatePlane *plane)

Static Public Member Functions
static const DataDimension	adjustedLowerUpperRange (const DataDimension &dim, bool adjustLower, bool adjustUpper)
static void	adjustLowerUpperRange (qreal &start, qreal &end, qreal stepWidth, bool adjustLower, bool adjustUpper)
static bool	isBoundariesValid (const DataDimensionsList &l)
static bool	isBoundariesValid (const QPair< QPointF, QPointF > &b)
static bool	isBoundariesValid (const QRectF &r)
static bool	isValueValid (const qreal &r)

Public Attributes
GridAttributes	gridAttributes

Protected Attributes
DataDimensionsList	mDataDimensions
AbstractCoordinatePlane *	mPlane

Detailed Description

Abstract base class for grid classes: cartesian, polar, ...

The AbstractGrid interface is the base class used by AbstractCoordinatePlane, for calculating and for drawing the grid lines of the plane.

Definition at line 33 of file KChartAbstractGrid.h.

Member Function Documentation

adjustedLowerUpperRange()

const DataDimension AbstractGrid::adjustedLowerUpperRange ( const DataDimension &  dim, bool  adjustLower, bool  adjustUpper  )

static

Adjusts dim so that dim.start and/or dim.end are a multiple of dim.stepWidth.

See also

adjustLowerUpperRange

Definition at line 95 of file KChartAbstractGrid.cpp.

adjustLowerUpperRange()

void AbstractGrid::adjustLowerUpperRange ( qreal &  start, qreal &  end, qreal  stepWidth, bool  adjustLower, bool  adjustUpper  )

static

Adjusts start and/or end so that they are a multiple of stepWidth.

Definition at line 82 of file KChartAbstractGrid.cpp.

drawGrid()

virtual void KChart::AbstractGrid::drawGrid ( PaintContext *  context )

pure virtual

Doing the actual drawing.

Every derived class must implement this.

Note

When implementing drawGrid(): Before you start drawing, make sure to call updateData(), to get the data boundaries recalculated. For an example, see the implementation of CartesianGrid:drawGrid().

Implemented in KChart::CartesianGrid, KChart::PolarGrid, KChart::RadarGrid, and KChart::LeveyJenningsGrid.

isBoundariesValid() [1/3]

bool AbstractGrid::isBoundariesValid ( const DataDimensionsList &  l )

static

Checks whether all start and end properties of every DataDimension in the list l are valid according to isValueValid().

See also

isValueValid

Definition at line 69 of file KChartAbstractGrid.cpp.

isBoundariesValid() [2/3]

bool AbstractGrid::isBoundariesValid ( const QPair< QPointF, QPointF > &  b )

static

Checks whether both coordinates of both points are valid according to isValueValid.

See also

isValueValid

Definition at line 63 of file KChartAbstractGrid.cpp.

isBoundariesValid() [3/3]

bool AbstractGrid::isBoundariesValid ( const QRectF &  r )

static

Checks whether both coordinates of r are valid according to isValueValid.

See also

isValueValid

Definition at line 58 of file KChartAbstractGrid.cpp.

isValueValid()

bool AbstractGrid::isValueValid ( const qreal &  r )

static

Checks if r is neither NaN nor infinity.

Definition at line 77 of file KChartAbstractGrid.cpp.

setNeedRecalculate()

void AbstractGrid::setNeedRecalculate

(

)

Causes grid to be recalculated upon the next call of updateData().

See also

calculateGrid

Definition at line 38 of file KChartAbstractGrid.cpp.

updateData()

DataDimensionsList AbstractGrid::updateData

(

AbstractCoordinatePlane *

plane

)

Returns the cached result of data calculation.

For this, all derived classes need to implement the pure-virtual calculateGrid() method.

Definition at line 43 of file KChartAbstractGrid.cpp.

---

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

• KChartAbstractGrid.h
• KChartAbstractGrid.cpp