vtkQtChartAxis Class Reference

#include <vtkQtChartAxis.h>

Collaboration diagram for vtkQtChartAxis:

Detailed Description

The vtkQtChartAxis class is used to display a cartesian axis.

Definition at line 45 of file vtkQtChartAxis.h.


Public Types
enum	AxisLocation { Left = 0, Bottom, Right, Top }
enum	AxisDomain { UnsupportedDomain = -1, Number = 0, Date, Time, String }
enum	{ Type = vtkQtChart_AxisType }
Public Slots
void	reset ()
	Resets the chart axis view.
void	setOffset (float offset)
	Sets the contents offset for the axis.
Signals
void	layoutNeeded ()
	Emitted when the axis needs to be layed out again.
void	pixelScaleChanged ()
	Emitted when the pixel-value scale changes.
Public Member Functions
	vtkQtChartAxis (AxisLocation location, QGraphicsItem *parent=0)
	Creates a chart axis view.
virtual	~vtkQtChartAxis ()
virtual int	type () const
Setup Methods
AxisLocation	getLocation () const
	Gets the axis location on the chart.
vtkQtChartAxisModel *	getModel () const
	Gets the chart axis model.
void	setModel (vtkQtChartAxisModel *model)
	Sets the chart axis model.
void	setNeigbors (const vtkQtChartAxis atMin, const vtkQtChartAxis atMax)
	Sets the neighboring axes if any.
void	setParallelAxis (const vtkQtChartAxis *across)
	Sets the parallel axis.
void	setContentsSpace (const vtkQtChartContentsSpace *contents)
	Sets the axis' contents space object.
void	setDataAvailable (bool available)
	Sets whether or not data is available for the axis.
bool	isBestFitGenerated () const
	Gets whether or not the axis labels are generated from the view size.
void	setBestFitGenerated (bool on)
	Sets whether or not the axis labels are generated from the view size.
void	getBestFitRange (QVariant &min, QVariant &max) const
	Gets the value range used when generating the axis labels.
void	setBestFitRange (const QVariant &min, const QVariant &max)
	Sets the value range used when generating the axis labels.
bool	isRangePaddingUsed () const
	Gets whether or not range padding is used.
void	setRangePaddingUsed (bool padRange)
	Sets whether or not range padding is used.
bool	isExpansionToZeroUsed () const
	Gets whether or not the range is expanded to zero.
void	setExpansionToZeroUsed (bool expand)
	Sets whether or not the range is expanded to zero.
bool	isExtraSpaceUsed () const
	Gets whether or not extra space is added around the axis tick marks.
void	setExtraSpaceUsed (bool addSpace)
	Sets whether or not extra space is added around the axis tick marks.
bool	isSpaceTooSmall () const
	Gets whether or not the space for the axis is too small.
void	setSpaceTooSmall (bool tooSmall)
	Sets whether or not the space for the axis is too small.
Drawing Parameters
vtkQtChartAxisOptions *	getOptions () const
	Gets the chart axis drawing options.
void	setOptions (const vtkQtChartAxisOptions &options)
	Sets the chart axis drawing options.
Display Methods
void	layoutAxis (const QRectF &area)
	Used to layout the chart axis.
void	adjustAxisLayout ()
	Used to adjust the bounding width for the axis.
float	getPreferredSpace () const
	Gets the space needed for the axis.
float	getFontHeight () const
	Gets the axis label font height.
float	getMaxLabelWidth () const
	Gets the maximum label width.
float	getTickLength () const
	Gets the length of the axis label tick marks.
float	getSmallTickLength () const
	Gets the length of the small axis label tick marks.
float	getTickLabelSpacing () const
	Gets the distance between the axis label and the tick mark.
bool	isLogScaleAvailable () const
	Gets whether or not logarithmic scale can be used.
virtual void	paint (QPainter painter, const QStyleOptionGraphicsItem option, QWidget *widget=0)
	Paints the chart axis using the given painter.
Location Methods
virtual QRectF	boundingRect () const
	Gets the bounding rectangle for the axis.
QRectF	getBounds () const
	Gets the bounding rectangle for the axis.
bool	isLabelTickVisible (int index) const
	Gets wether or not the given label tickmark is visible.
float	getLabelLocation (int index) const
	Gets the location of the given label.
AxisDomain	getAxisDomain () const
	Gets the current axis domain.
bool	isValueInDomain (const QVariant &value) const
	Gets whether or not the given value is in the axis domain.
float	getPixel (const QVariant &value) const
	Gets the pixel location for the given value.
float	getZeroPixel () const
	Gets the pixel location for zero.
Static Public Member Functions
static bool	isLogScaleValid (const QVariant &min, const QVariant &max)
	Gets whether or not logarithmic scale can be used for the given range.
Static Public Attributes
static const double	MinLogValue
	Stores the log scale minimum.

Member Enumeration Documentation

enum vtkQtChartAxis::AxisLocation

Enumerator:

Left	The axis is on the left of the chart.
Bottom	The axis is on the bottom of the chart.
Right	The axis is on the right of the chart.
Top	The axis is on the top of the chart.

Definition at line 50 of file vtkQtChartAxis.h.

enum vtkQtChartAxis::AxisDomain

Enumerator:

UnsupportedDomain
Number	Domain for int and double.
Date	Domain for QDate and QDateTime.
Time	Domain for QTime.
String	Domain for QString.

Definition at line 58 of file vtkQtChartAxis.h.

anonymous enum

Enumerator:

Type

Definition at line 67 of file vtkQtChartAxis.h.

Constructor & Destructor Documentation

vtkQtChartAxis::vtkQtChartAxis	(	AxisLocation	location,
		QGraphicsItem *	parent = `0`
	)

Creates a chart axis view.

Parameters:

	location	Where on the chart the axis will be drawn.
	parent	The parent item.

virtual vtkQtChartAxis::~vtkQtChartAxis ( ) [virtual]

Member Function Documentation

virtual int vtkQtChartAxis::type ( ) const [inline, virtual]

Definition at line 77 of file vtkQtChartAxis.h.

AxisLocation vtkQtChartAxis::getLocation ( ) const [inline]

Gets the axis location on the chart.

Returns:: The axis location on the chart.

Definition at line 85 of file vtkQtChartAxis.h.

vtkQtChartAxisModel* vtkQtChartAxis::getModel ( ) const [inline]

Gets the chart axis model.

Returns:: A pointer to the chart axis model.

Definition at line 91 of file vtkQtChartAxis.h.

void vtkQtChartAxis::setModel ( vtkQtChartAxisModel * model )

Sets the chart axis model.

Parameters:

model

The model to display.

void vtkQtChartAxis::setNeigbors	(	const vtkQtChartAxis *	atMin,
		const vtkQtChartAxis *	atMax
	)

Sets the neighboring axes if any.

The neighboring axes are used when laying out the axis. The axis pixel positions are adjusted to accound for the space requirements of its neighbors.

Parameters:

	atMin	The axis at the minimum value end.
	atMax	The axis at the maximum value end.

void vtkQtChartAxis::setParallelAxis ( const vtkQtChartAxis * across )

Sets the parallel axis.

Parameters:

across

The axis parallel to this one.

void vtkQtChartAxis::setContentsSpace ( const vtkQtChartContentsSpace * contents )

Sets the axis' contents space object.

Parameters:

contents

The new contents space object.

void vtkQtChartAxis::setDataAvailable ( bool available )

Sets whether or not data is available for the axis.

This parameter is used when the best fit range is zero. If data is available, the axis generates labels around the data value. This is needed when the data points are the same value for an axis, such as a vertical or horizontal line on a line chart.

Parameters:

available

True if data is available.

bool vtkQtChartAxis::isBestFitGenerated ( ) const

Gets whether or not the axis labels are generated from the view size.

Returns:: True if the axis labels are generated from the view size.

void vtkQtChartAxis::setBestFitGenerated ( bool on )

Sets whether or not the axis labels are generated from the view size.

Parameters:

on

True if the axis labels should be generated.

void vtkQtChartAxis::getBestFitRange	(	QVariant &	min,
		QVariant &	max
	)			const

Gets the value range used when generating the axis labels.

Parameters:

	min	Used to return the minimum value.
	max	Used to return the maximum value.

void vtkQtChartAxis::setBestFitRange	(	const QVariant &	min,
		const QVariant &	max
	)

Sets the value range used when generating the axis labels.

Parameters:

	min	The minimum value.
	max	The maximum value.

bool vtkQtChartAxis::isRangePaddingUsed ( ) const

Gets whether or not range padding is used.

This setting only affects the best-fit layout. When range padding is used, the axis makes sure there is space between the best-fit range and the actual minimum and maximum labels.

Returns:: True if range padding is used.

void vtkQtChartAxis::setRangePaddingUsed ( bool padRange )

Sets whether or not range padding is used.

Parameters:

padRange

True if range padding should be used.

bool vtkQtChartAxis::isExpansionToZeroUsed ( ) const

Gets whether or not the range is expanded to zero.

This setting only affects the best-fit layout. If the range does not include zero, the range is expanded to include it. This is used by the bar chart to make sure the minimum bar has some length to it.

Returns:: True if the range is expanded to zero.

void vtkQtChartAxis::setExpansionToZeroUsed ( bool expand )

Sets whether or not the range is expanded to zero.

Parameters:

expand

True if the range should be expanded to zero.

bool vtkQtChartAxis::isExtraSpaceUsed ( ) const

Gets whether or not extra space is added around the axis tick marks.

This setting does not affect the best-fit layout. Extra space is added before the minimum and after the maximum. This is usefull for chart objects that expand around the tick mark like the bar in a bar chart.

Returns:: True if extra space is added around the axis tick marks.

void vtkQtChartAxis::setExtraSpaceUsed ( bool addSpace )

Sets whether or not extra space is added around the axis tick marks.

Parameters:

addSpace

True if space should be added around the axis tick marks.

bool vtkQtChartAxis::isSpaceTooSmall ( ) const

Gets whether or not the space for the axis is too small.

Returns:: True if the space for the axis is too small.

void vtkQtChartAxis::setSpaceTooSmall ( bool tooSmall )

Sets whether or not the space for the axis is too small.

Parameters:

tooSmall

True if the space for the axis is too small.

vtkQtChartAxisOptions* vtkQtChartAxis::getOptions ( ) const [inline]

Gets the chart axis drawing options.

Returns:: A pointer to the chart axis drawing options.

Definition at line 226 of file vtkQtChartAxis.h.

void vtkQtChartAxis::setOptions ( const vtkQtChartAxisOptions & options )

Sets the chart axis drawing options.

This method sets all the axis options at once, which can prevent unnecessary view updates.

Parameters:

options

The new axis drawing options.

void vtkQtChartAxis::layoutAxis ( const QRectF & area )

Used to layout the chart axis.

This method must be called before the axis can be drawn.

Parameters:

area

The total chart area.

void vtkQtChartAxis::adjustAxisLayout ( )

Used to adjust the bounding width for the axis.

This method only affects left and right locations. It is called after the neighboring axes have been layed out. The neighboring axes may need more space to display the labels.

float vtkQtChartAxis::getPreferredSpace ( ) const

Gets the space needed for the axis.

If the axis is horizontal, the space needed is the preferred height. If the axis is vertical, the space needed is the preferred width. The preferred height can be obtained at any time. The preferred width is only valid after a layout.

Returns:: The space needed for the axis.

float vtkQtChartAxis::getFontHeight ( ) const

Gets the axis label font height.

Returns:: The axis label font height.

float vtkQtChartAxis::getMaxLabelWidth ( ) const

Gets the maximum label width.

The maximum label width is only valid after a layout.

Returns:: The maximum label width.

float vtkQtChartAxis::getTickLength ( ) const

Gets the length of the axis label tick marks.

Returns:: The length of the axis label tick marks.

float vtkQtChartAxis::getSmallTickLength ( ) const

Gets the length of the small axis label tick marks.

Returns:: The length of the small axis label tick marks.

float vtkQtChartAxis::getTickLabelSpacing ( ) const

Gets the distance between the axis label and the tick mark.

return The distance between the axis label and the tick mark.

bool vtkQtChartAxis::isLogScaleAvailable ( ) const

Gets whether or not logarithmic scale can be used.

Returns:: True if logarithmic scale can be used.

virtual void vtkQtChartAxis::paint	(	QPainter *	painter,
		const QStyleOptionGraphicsItem *	option,
		QWidget *	widget = `0`
	)			`[virtual]`

Paints the chart axis using the given painter.

Parameters:

	painter	The painter to use.
	option	The area to paint and the level of detail.
	widget	The widget being painted.

virtual QRectF vtkQtChartAxis::boundingRect ( ) const [virtual]

Gets the bounding rectangle for the axis.

The bounding box returned is only valid after a layout. The rectangle is in chart coordinates.

Returns:: The bounding rectangle for the axis.

QRectF vtkQtChartAxis::getBounds ( ) const

Gets the bounding rectangle for the axis.

The bounding box returned is only valid after a layout. The rectangle is in chart coordinates.

Returns:: The bounding rectangle for the axis.

bool vtkQtChartAxis::isLabelTickVisible ( int index ) const

Gets wether or not the given label tickmark is visible.

Parameters:

index

The index of the label.

Returns:: True if the given label tickmark is visible.

float vtkQtChartAxis::getLabelLocation ( int index ) const

Gets the location of the given label.

Parameters:

index

The index of the label.

Returns:: The location of the given label.

AxisDomain vtkQtChartAxis::getAxisDomain ( ) const

Gets the current axis domain.

Returns:: The current axis domain.

bool vtkQtChartAxis::isValueInDomain ( const QVariant & value ) const

Gets whether or not the given value is in the axis domain.

Parameters:

value

The value to test.

Returns:: True if the given value is in the axis domain.

float vtkQtChartAxis::getPixel ( const QVariant & value ) const

Gets the pixel location for the given value.

The pixel location relates to the orientation of the axis.

Parameters:

value

The value to map.

Returns:: The pixel location for the given value.

float vtkQtChartAxis::getZeroPixel ( ) const

Gets the pixel location for zero.

For int and double domains, the pixel location returned is limited by the axis pixel range. For non-numeric domains, the axis minimum pixel location is returned.

Returns:: The pixel location for zero.

static bool vtkQtChartAxis::isLogScaleValid	(	const QVariant &	min,
		const QVariant &	max
	)			`[static]`

Gets whether or not logarithmic scale can be used for the given range.

Parameters:

	min	The range minimum.
	max	The range maximum.

Returns:: True if logarithmic scale can be used for the given range.

void vtkQtChartAxis::layoutNeeded ( ) [signal]

Emitted when the axis needs to be layed out again.

void vtkQtChartAxis::pixelScaleChanged ( ) [signal]

Emitted when the pixel-value scale changes.

The pixel-value scale is only modified inside the axis layout method. Charts using this signal should never emit layoutNeeded when responding to this signal. Instead, set a flag to use when the chart layout method is called.

void vtkQtChartAxis::reset ( ) [slot]

Resets the chart axis view.

void vtkQtChartAxis::setOffset ( float offset ) [slot]

Sets the contents offset for the axis.

Parameters:

offset

The new contents offset.

Member Data Documentation

const double vtkQtChartAxis::MinLogValue [static]

Stores the log scale minimum.

Definition at line 463 of file vtkQtChartAxis.h.

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

dox/GUISupport/Qt/Chart/vtkQtChartAxis.h

vtkQtChartAxis Class Reference

Detailed Description

Public Types

Public Slots

Signals

Public Member Functions

Static Public Member Functions

Static Public Attributes

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation