vtkQtChartBarLocator Class Reference

The vtkQtChartBarLocator class is used to locate bars in a tree structure. More...

#include <vtkQtChartBarLocator.h>

List of all members.

Public Member Functions
	vtkQtChartBarLocator ()
	~vtkQtChartBarLocator ()
void	clear ()
	Removes all the tree items.
void	build (const QList< vtkQtChartBar * > &list)
	Builds a bar tree from the ordered list of rectangles.
void	update ()
	Updates the bounding rectangles in the bar tree.
vtkQtChartBar *	getItemAt (const QPointF &point) const
	Gets the bar at the specified point.
QList< vtkQtChartBar * >	getItemsIn (const QRectF &area) const
	Gets the bars in the specified rectangle.
vtkQtChartBarLocatorNode *	getLast ()
	Gets the last node in the tree.
vtkQtChartBarLocatorNode *	getPrevious (vtkQtChartBarLocatorNode *node)
	Gets the previous node in the tree.

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Detailed Description

The vtkQtChartBarLocator class is used to locate bars in a tree structure.

The tree is built from a list of bars. The leaf nodes store the bars. The bounding rectangles can be updated if the layout remains unchanged.

Definition at line 152 of file vtkQtChartBarLocator.h.

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Constructor & Destructor Documentation

vtkQtChartBarLocator::vtkQtChartBarLocator

(

)

vtkQtChartBarLocator::~vtkQtChartBarLocator

(

)

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Member Function Documentation

void vtkQtChartBarLocator::clear

(

)

Removes all the tree items.

void vtkQtChartBarLocator::build

(

const QList< vtkQtChartBar * > &

list

)

Builds a bar tree from the ordered list of rectangles.

The bar pointers are stored by the tree and should not be deleted until the tree has been cleared.

Parameters:

list	The ordered list of rectangles.

void vtkQtChartBarLocator::update

(

)

Updates the bounding rectangles in the bar tree.

The nodes are traversed from last to first. The bounding rectangle of each node is updated using the bar if it is a leaf or the bounds of the children otherwise.

vtkQtChartBar* vtkQtChartBarLocator::getItemAt

(

const QPointF &

point

)

const

Gets the bar at the specified point.

Parameters:

point

The point to search.

Returns:

A pointer to the bar at the given point.

QList<vtkQtChartBar *> vtkQtChartBarLocator::getItemsIn

(

const QRectF &

area

)

const

Gets the bars in the specified rectangle.

Parameters:

area	The rectangle to search.

Returns:

The list of bars in the given rectangle.

vtkQtChartBarLocatorNode* vtkQtChartBarLocator::getLast

(

)

Gets the last node in the tree.

Returns:

A pointer to the last node in the tree.

vtkQtChartBarLocatorNode* vtkQtChartBarLocator::getPrevious

(

vtkQtChartBarLocatorNode *

node

)

Gets the previous node in the tree.

Parameters:

node	The node to search from.

Returns:

A pointer to the previous node in the tree.

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

• dox/GUISupport/Qt/Chart/vtkQtChartBarLocator.h