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.ComponentOrientation
Constructor | Description |
---|---|
LayoutFocusTraversalPolicy() |
Constructs a LayoutFocusTraversalPolicy.
|
Modifier and Type | Method | Description |
---|---|---|
protected boolean |
accept(Component aComponent) |
Determines whether the specified
Component
is an acceptable choice as the new focus owner. |
Component |
getComponentAfter(Container aContainer,
Component aComponent) |
Returns the Component that should receive the focus after aComponent.
|
Component |
getComponentBefore(Container aContainer,
Component aComponent) |
Returns the Component that should receive the focus before aComponent.
|
Component |
getFirstComponent(Container aContainer) |
Returns the first Component in the traversal cycle.
|
Component |
getLastComponent(Container aContainer) |
Returns the last Component in the traversal cycle.
|
getInitialComponent
getInitialComponent
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
getComparator, getDefaultComponent, getImplicitDownCycleTraversal, setComparator, setImplicitDownCycleTraversal
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
Component.isVisible()
,
Component.isDisplayable()
,
Component.isEnabled()
,
Component.isFocusable()
,
ComboBoxUI.isFocusTraversable(javax.swing.JComboBox<?>)
,
JComponent.getInputMap(int)
,
DefaultFocusTraversalPolicy.accept(java.awt.Component)
Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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DRAFT 9-internal+0-adhoc.mlchung.jdk9-jdeps