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ComponentTraverser Class Referenceabstract
juce_gui_basics » components

Base class for traversing components. More...

`#include <juce_ComponentTraverser.h>`

Inheritance diagram for ComponentTraverser:

## Public Member Functions
virtual | ~ComponentTraverser ()=default
| Destructor.
virtual Component * | getDefaultComponent (Component *parentComponent)=0
| Returns the component that should be used as the traversal entry point within the given parent component.
virtual Component * | getNextComponent (Component *current)=0
| Returns the component that comes after the specified one when moving "forwards".
virtual Component * | getPreviousComponent (Component *current)=0
| Returns the component that comes after the specified one when moving "backwards".
virtual std::vector< Component * > | getAllComponents (Component *parentComponent)=0
| Returns all of the traversable components within the given parent component in traversal order.

## Detailed Description

Base class for traversing components.

If you need custom focus or keyboard focus traversal for a component you can create a subclass of ComponentTraverser and return it from Component::createFocusTraverser() or Component::createKeyboardFocusTraverser().

See also
  Component::createFocusTraverser, Component::createKeyboardFocusTraverser

## Constructor & Destructor Documentation

## ◆ ~ComponentTraverser()

virtual ComponentTraverser::~ComponentTraverser | ( |  | ) |
| virtual default

Destructor.

## Member Function Documentation

## ◆ getDefaultComponent()

virtual Component * ComponentTraverser::getDefaultComponent | ( | Component * | parentComponent | ) |
| pure virtual

Returns the component that should be used as the traversal entry point within the given parent component.

This must return nullptr if there is no default component.

Implemented in FocusTraverser, and KeyboardFocusTraverser.

## ◆ getNextComponent()

virtual Component * ComponentTraverser::getNextComponent | ( | Component * | current | ) |
| pure virtual

Returns the component that comes after the specified one when moving "forwards".

This must return nullptr if there is no next component.

Implemented in FocusTraverser, and KeyboardFocusTraverser.

## ◆ getPreviousComponent()

virtual Component * ComponentTraverser::getPreviousComponent | ( | Component * | current | ) |
| pure virtual

Returns the component that comes after the specified one when moving "backwards".

This must return nullptr if there is no previous component.

Implemented in FocusTraverser, and KeyboardFocusTraverser.

## ◆ getAllComponents()

virtual std::vector< Component * > ComponentTraverser::getAllComponents | ( | Component * | parentComponent | ) |
| pure virtual

Returns all of the traversable components within the given parent component in traversal order.

Implemented in FocusTraverser, and KeyboardFocusTraverser.

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

- juce_ComponentTraverser.h