Serializable
public class LayoutFocusTraversalPolicy extends SortingFocusTraversalPolicy implements Serializable
ComponentOrientation
for more information. All columns in a row are fully traversed before proceeding to the next row.Constructor | Description |
---|---|
LayoutFocusTraversalPolicy() |
Constructs a LayoutFocusTraversalPolicy. |
Modifier and Type | Method | Description |
---|---|---|
protected boolean |
accept |
Determines whether the specified Component is an acceptable choice as the new focus owner. |
Component |
getComponentAfter |
Returns the Component that should receive the focus after aComponent. |
Component |
getComponentBefore |
Returns the Component that should receive the focus before aComponent. |
Component |
getFirstComponent |
Returns the first Component in the traversal cycle. |
Component |
getLastComponent |
Returns the last Component in the traversal cycle. |
getComparator, getDefaultComponent, getImplicitDownCycleTraversal, setComparator, setImplicitDownCycleTraversal
getInitialComponent
getInitialComponent
public LayoutFocusTraversalPolicy()
public Component getComponentAfter(Container aContainer, Component 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.
getComponentAfter
in class SortingFocusTraversalPolicy
aContainer
- a focus cycle root of aComponent or a focus traversal policy provideraComponent
- a (possibly indirect) child of aContainer, or aContainer itselfIllegalArgumentException
- if aContainer is not a focus cycle root of aComponent or a focus traversal policy provider, or if either aContainer or aComponent is nullpublic Component getComponentBefore(Container aContainer, Component 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.
getComponentBefore
in class SortingFocusTraversalPolicy
aContainer
- a focus cycle root of aComponent or a focus traversal policy provideraComponent
- a (possibly indirect) child of aContainer, or aContainer itselfIllegalArgumentException
- if aContainer is not a focus cycle root of aComponent or a focus traversal policy provider, or if either aContainer or aComponent is nullpublic Component getFirstComponent(Container aContainer)
getFirstComponent
in class SortingFocusTraversalPolicy
aContainer
- a focus cycle root of aComponent or a focus traversal policy provider whose first Component is to be returnedIllegalArgumentException
- if aContainer is nullpublic Component getLastComponent(Container aContainer)
getLastComponent
in class SortingFocusTraversalPolicy
aContainer
- a focus cycle root of aComponent or a focus traversal policy provider whose last Component is to be returnedIllegalArgumentException
- if aContainer is nullprotected boolean accept(Component aComponent)
Component
is an acceptable choice as the new focus owner. This method performs the following sequence of operations: aComponent
is visible, displayable, enabled, and focusable. If any of these properties is false
, this method returns false
. aComponent
is an instance of JTable
, returns true
. aComponent
is an instance of JComboBox
, then returns the value of aComponent.getUI().isFocusTraversable(aComponent)
. aComponent
is a JComponent
with a JComponent.WHEN_FOCUSED
InputMap
that is neither null
nor empty, returns true
. DefaultFocusTraversalPolicy.accept(aComponent)
. accept
in class SortingFocusTraversalPolicy
aComponent
- the Component
whose fitness as a focus owner is to be testedtrue
if aComponent
is a valid choice for a focus owner; otherwise false
© 1993, 2023, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/swing/LayoutFocusTraversalPolicy.html