Package Summary  Overview Summary

class:LayoutFocusTraversalPolicy [NONE]

  • All Implemented Interfaces:
    Serializable

    public class LayoutFocusTraversalPolicy
    extends SortingFocusTraversalPolicy
    implements Serializable
    
    A SortingFocusTraversalPolicy which sorts Components based on their size, position, and orientation. Based on their size and position, Components are roughly categorized into rows and columns. For a Container with horizontal orientation, columns run left-to-right or right-to-left, and rows run top- to-bottom. For a Container with vertical orientation, columns run top-to- bottom and rows run left-to-right or right-to-left. See ComponentOrientation for more information. All columns in a row are fully traversed before proceeding to the next row.
    Since:
    1.4
    See Also:
    ComponentOrientation

constructor:LayoutFocusTraversalPolicy() [NONE]

  • LayoutFocusTraversalPolicy

    public LayoutFocusTraversalPolicy()
    Constructs a LayoutFocusTraversalPolicy.

method:getComponentAfter(java.awt.Container,java.awt.Component) [NONE]

  • getComponentAfter

    public Component getComponentAfter​(Container aContainer,
                                       Component aComponent)
    Returns the Component that should receive the focus after aComponent. aContainer must be a focus cycle root of aComponent.

    By default, LayoutFocusTraversalPolicy implicitly transfers focus down- cycle. That is, during normal focus traversal, the Component traversed after a focus cycle root will be the focus-cycle-root's default Component to focus. This behavior can be disabled using the setImplicitDownCycleTraversal method.

    If aContainer is focus traversal policy provider , the focus is always transferred down-cycle.

    Overrides:
    getComponentAfter in class SortingFocusTraversalPolicy
    Parameters:
    aContainer - a focus cycle root of aComponent or a focus traversal policy provider
    aComponent - a (possibly indirect) child of aContainer, or aContainer itself
    Returns:
    the Component that should receive the focus after aComponent, or null if no suitable Component can be found
    Throws:
    IllegalArgumentException - if aContainer is not a focus cycle root of aComponent or a focus traversal policy provider, or if either aContainer or aComponent is null

method:getComponentBefore(java.awt.Container,java.awt.Component) [NONE]

  • getComponentBefore

    public Component getComponentBefore​(Container aContainer,
                                        Component aComponent)
    Returns the Component that should receive the focus before aComponent. aContainer must be a focus cycle root of aComponent.

    By default, LayoutFocusTraversalPolicy implicitly transfers focus down- cycle. That is, during normal focus traversal, the Component traversed after a focus cycle root will be the focus-cycle-root's default Component to focus. This behavior can be disabled using the setImplicitDownCycleTraversal method.

    If aContainer is focus traversal policy provider , the focus is always transferred down-cycle.

    Overrides:
    getComponentBefore in class SortingFocusTraversalPolicy
    Parameters:
    aContainer - a focus cycle root of aComponent or a focus traversal policy provider
    aComponent - a (possibly indirect) child of aContainer, or aContainer itself
    Returns:
    the Component that should receive the focus before aComponent, or null if no suitable Component can be found
    Throws:
    IllegalArgumentException - if aContainer is not a focus cycle root of aComponent or a focus traversal policy provider, or if either aContainer or aComponent is null

method:getFirstComponent(java.awt.Container) [NONE]

  • getFirstComponent

    public Component getFirstComponent​(Container aContainer)
    Returns the first Component in the traversal cycle. This method is used to determine the next Component to focus when traversal wraps in the forward direction.
    Overrides:
    getFirstComponent in class SortingFocusTraversalPolicy
    Parameters:
    aContainer - a focus cycle root of aComponent or a focus traversal policy provider whose first Component is to be returned
    Returns:
    the first Component in the traversal cycle of aContainer, or null if no suitable Component can be found
    Throws:
    IllegalArgumentException - if aContainer is null

method:getLastComponent(java.awt.Container) [NONE]

  • getLastComponent

    public Component getLastComponent​(Container aContainer)
    Returns the last Component in the traversal cycle. This method is used to determine the next Component to focus when traversal wraps in the reverse direction.
    Overrides:
    getLastComponent in class SortingFocusTraversalPolicy
    Parameters:
    aContainer - a focus cycle root of aComponent or a focus traversal policy provider whose last Component is to be returned
    Returns:
    the last Component in the traversal cycle of aContainer, or null if no suitable Component can be found
    Throws:
    IllegalArgumentException - if aContainer is null

method:accept(java.awt.Component) [NONE]

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