interface org.aswing.FocusTraversalPolicy
| Implementors | ||||
 | ContainerOrderFocusTraversalPolicy |
| ||
A FocusTraversalPolicy defines the order in which Components with a particular focus cycle root are traversed in a Container.
The core responsibility of a FocusTraversalPolicy is to provide algorithms determining the next and previous Components to focus when traversing forward or backward in a UI. Each FocusTraversalPolicy must also provide algorithms for determining the default Components in a traversal cycle. The default Component is the first to receive focus when traversing down into a new focus traversal cycle. if the next/previous searched null to be returned, it means can't found a component to be focused.
Instance Fields
function getComponentAfter(c:Component): Component
Returns the Component that should receive the focus after c.
| c | the focus position used to count next |
| returns | the Component that should receive the focus after c, or null if no Component can be found in this policy |
function getComponentBefore(c:Component): Component
Returns the Component that should receive the focus before c.
| c | the focus position used to count previous |
| returns | the Component that should receive the focus before c, or null if no Component can be found in this policy |
function getDefaultComponent(container:Container): Component
Returns the default Component to focus in the specifield container. This Component will be the first to receive focus when traversing down into this container.
| container | the cirle root container |
| returns | the default Component in the container, or null if no Component can be found |