Class InternalFrameFocusTraversalPolicy

java.lang.Object
java.awt.FocusTraversalPolicy
javax.swing.InternalFrameFocusTraversalPolicy
Direct Known Subclasses:
SortingFocusTraversalPolicy
public abstract class InternalFrameFocusTraversalPolicy extends FocusTraversalPolicy
A FocusTraversalPolicy which can optionally provide an algorithm for determining a JInternalFrame's initial Component. The initial Component is the first to receive focus when the JInternalFrame is first selected. By default, this is the same as the JInternalFrame's default Component to focus.
Since:
1.4

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    protected
    InternalFrameFocusTraversalPolicy()
    Constructor for subclasses to call.

  • Method Summary

    Modifier and Type
    Method
    Description
    Component
    getInitialComponent(JInternalFrame frame)
    Returns the Component that should receive the focus when a JInternalFrame is selected for the first time.

    Methods declared in class FocusTraversalPolicy

    getComponentAfter, getComponentBefore, getDefaultComponent, getFirstComponent, getInitialComponent, getLastComponent
    Modifier and Type
    Method
    Description
    abstract 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 or a focus traversal policy provider.
    abstract 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 or a focus traversal policy provider.
    abstract Component
    getDefaultComponent(Container aContainer)
    Returns the default Component to focus.
    abstract Component
    getFirstComponent(Container aContainer)
    Returns the first Component in the traversal cycle.
    Component
    getInitialComponent(Window window)
    Returns the Component that should receive the focus when a Window is made visible for the first time.
    abstract Component
    getLastComponent(Container aContainer)
    Returns the last Component in the traversal cycle.

    Methods declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    String
    toString()
    Answers a string containing a concise, human-readable description of the receiver.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • Constructor Details

    • InternalFrameFocusTraversalPolicy

      protected InternalFrameFocusTraversalPolicy()
      Constructor for subclasses to call.

  • Method Details

    • getInitialComponent

      public Component getInitialComponent(JInternalFrame frame)
      Returns the Component that should receive the focus when a JInternalFrame is selected for the first time. Once the JInternalFrame has been selected by a call to setSelected(true), the initial Component will not be used again. Instead, if the JInternalFrame loses and subsequently regains selection, or is made invisible or undisplayable and subsequently made visible and displayable, the JInternalFrame's most recently focused Component will become the focus owner. The default implementation of this method returns the JInternalFrame's default Component to focus.
      Parameters:
      frame - the JInternalFrame whose initial Component is to be returned
      Returns:
      the Component that should receive the focus when frame is selected for the first time, or null if no suitable Component can be found
      Throws:
      IllegalArgumentException - if window is null
      See Also: