org.tentackle.ui
Class FormFocusTraversalPolicy

java.lang.Object
  java.awt.FocusTraversalPolicy
      javax.swing.InternalFrameFocusTraversalPolicy
          javax.swing.SortingFocusTraversalPolicy
              javax.swing.LayoutFocusTraversalPolicy
                  org.tentackle.ui.FormFocusTraversalPolicy

All Implemented Interfaces:

Serializable

public class FormFocusTraversalPolicy
extends LayoutFocusTraversalPolicy

Keyboard focus traversal policy for Tentackle forms.

Author:

harald

See Also:

Serialized Form

Constructor Summary

FormFocusTraversalPolicy()

Method Summary

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.

Methods inherited from class javax.swing.LayoutFocusTraversalPolicy

getComponentBefore, getFirstComponent, getLastComponent

Methods inherited from class javax.swing.SortingFocusTraversalPolicy

getComparator, getDefaultComponent, getImplicitDownCycleTraversal, setComparator, setImplicitDownCycleTraversal

Methods inherited from class javax.swing.InternalFrameFocusTraversalPolicy

getInitialComponent

Methods inherited from class java.awt.FocusTraversalPolicy

getInitialComponent

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FormFocusTraversalPolicy

public FormFocusTraversalPolicy()

Method Detail

accept

protected boolean accept(Component aComponent)

Determines whether the specified Component is an acceptable choice as the new focus owner. This method performs the following sequence of operations:

1. Checks whether aComponent is visible, displayable, enabled, and focusable. If any of these properties is false, this method returns false.
2. If aComponent is an instance of JTable, returns true.
3. If aComponent is an instance of JComboBox, then returns the value of aComponent.getUI().isFocusTraversable(aComponent).
4. If aComponent is a JComponent with a JComponent.WHEN_FOCUSED InputMap that is neither null nor empty, returns true.
5. Returns the value of DefaultFocusTraversalPolicy.accept(aComponent).

Overridden to accept only FormComponents, FormButtons, FormTables and JPasswordFields

Overrides:

accept in class LayoutFocusTraversalPolicy

Parameters:

aComponent - the Component whose fitness as a focus owner is to be tested

Returns:

true if aComponent is a valid choice for a focus owner; otherwise false

See Also:

Component.isVisible(), Component.isDisplayable(), Component.isEnabled(), Component.isFocusable(), ComboBoxUI.isFocusTraversable(javax.swing.JComboBox), JComponent.getInputMap(int), DefaultFocusTraversalPolicy.accept(java.awt.Component)

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.

Overridden to trigger FormWrapEvent.

Overrides:

getComponentAfter in class LayoutFocusTraversalPolicy

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