Java javax.swing.plaf Class LayerUI<V extends Component>（JDK8）

Constructor Detail

• LayerUI

  public LayerUI()

Method Detail

• paint

  public void paint(Graphics g,
                    JComponent c)

  Paints the specified component. Subclasses should override this method and use the specified Graphics object to render the content of the component.

  The default implementation paints the passed component as is.

  Overrides:

  paint in class ComponentUI

  Parameters:

  g - the Graphics context in which to paint

  c - the component being painted

  See Also:

  ComponentUI.update(java.awt.Graphics, javax.swing.JComponent)

• eventDispatched

  public void eventDispatched(AWTEvent e,
                              JLayer<? extends V> l)

  Processes AWTEvents for JLayer and all its descendants to this LayerUI instance.

  To enable the AWTEvents of a particular type, you call JLayer.setLayerEventMask(long) in installUI(javax.swing.JComponent) and set the layer event mask to 0 in uninstallUI(javax.swing.JComponent) after that. By default this method calls the appropriate process<event type>Event method for the given class of event.

  Note: Events are processed only for displayable JLayers.

  Parameters:

  e - the event to be dispatched

  l - the layer this LayerUI is set to

  See Also:

  JLayer.setLayerEventMask(long), Component.isDisplayable(), processComponentEvent(java.awt.event.ComponentEvent, javax.swing.JLayer<? extends V>), processFocusEvent(java.awt.event.FocusEvent, javax.swing.JLayer<? extends V>), processKeyEvent(java.awt.event.KeyEvent, javax.swing.JLayer<? extends V>), processMouseEvent(java.awt.event.MouseEvent, javax.swing.JLayer<? extends V>), processMouseMotionEvent(java.awt.event.MouseEvent, javax.swing.JLayer<? extends V>), processInputMethodEvent(java.awt.event.InputMethodEvent, javax.swing.JLayer<? extends V>), processHierarchyEvent(java.awt.event.HierarchyEvent, javax.swing.JLayer<? extends V>), processMouseWheelEvent(java.awt.event.MouseWheelEvent, javax.swing.JLayer<? extends V>)

• processComponentEvent

  protected void processComponentEvent(ComponentEvent e,
                                       JLayer<? extends V> l)

  Processes component events occurring on the JLayer or any of its subcomponents.

  This method is not called unless component events are enabled for the JLayer objects, this LayerUI is set to. Component events are enabled in the overridden installUI(javax.swing.JComponent) method and should be disabled in the uninstallUI(javax.swing.JComponent) method after that.

   public void installUI(JComponent c) {
      super.installUI(c);
      JLayer l = (JLayer) c;
      l.setLayerEventMask(AWTEvent.COMPONENT_EVENT_MASK);
   }
  
   public void uninstallUI(JComponent c) {
       super.uninstallUI(c);
       JLayer l = (JLayer) c;
       l.setLayerEventMask(0);
   }
   

  Parameters:

  e - the ComponentEvent to be processed

  l - the layer this LayerUI instance is set to

  See Also:

  JLayer.setLayerEventMask(long), installUI(javax.swing.JComponent), uninstallUI(javax.swing.JComponent)

• processFocusEvent

  protected void processFocusEvent(FocusEvent e,
                                   JLayer<? extends V> l)

  Processes focus events occurring on the JLayer or any of its subcomponents.

  This method is not called unless focus events are enabled for the JLayer objects, this LayerUI is set to. Focus events are enabled in the overridden installUI(javax.swing.JComponent) method and should be disabled in the uninstallUI(javax.swing.JComponent) method after that.

   public void installUI(JComponent c) {
      super.installUI(c);
      JLayer l = (JLayer) c;
      l.setLayerEventMask(AWTEvent.FOCUS_EVENT_MASK);
   }
  
   public void uninstallUI(JComponent c) {
       super.uninstallUI(c);
       JLayer l = (JLayer) c;
       l.setLayerEventMask(0);
   }
   

  Parameters:

  e - the FocusEvent to be processed

  l - the layer this LayerUI instance is set to

  See Also:

  JLayer.setLayerEventMask(long), installUI(javax.swing.JComponent), uninstallUI(javax.swing.JComponent)

• processKeyEvent

  protected void processKeyEvent(KeyEvent e,
                                 JLayer<? extends V> l)

  Processes key events occurring on the JLayer or any of its subcomponents.

  This method is not called unless key events are enabled for the JLayer objects, this LayerUI is set to. Key events are enabled in the overridden installUI(javax.swing.JComponent) method and should be disabled in the uninstallUI(javax.swing.JComponent) method after that.

   public void installUI(JComponent c) {
      super.installUI(c);
      JLayer l = (JLayer) c;
      l.setLayerEventMask(AWTEvent.KEY_EVENT_MASK);
   }
  
   public void uninstallUI(JComponent c) {
       super.uninstallUI(c);
       JLayer l = (JLayer) c;
       l.setLayerEventMask(0);
   }
   

  Parameters:

  e - the KeyEvent to be processed

  l - the layer this LayerUI instance is set to

  See Also:

  JLayer.setLayerEventMask(long), installUI(javax.swing.JComponent), uninstallUI(javax.swing.JComponent)

• processMouseEvent

  protected void processMouseEvent(MouseEvent e,
                                   JLayer<? extends V> l)

  Processes mouse events occurring on the JLayer or any of its subcomponents.

  This method is not called unless mouse events are enabled for the JLayer objects, this LayerUI is set to. Mouse events are enabled in the overridden installUI(javax.swing.JComponent) method and should be disabled in the uninstallUI(javax.swing.JComponent) method after that.

   public void installUI(JComponent c) {
      super.installUI(c);
      JLayer l = (JLayer) c;
      l.setLayerEventMask(AWTEvent.MOUSE_EVENT_MASK);
   }
  
   public void uninstallUI(JComponent c) {
       super.uninstallUI(c);
       JLayer l = (JLayer) c;
       l.setLayerEventMask(0);
   }
   

  Parameters:

  e - the MouseEvent to be processed

  l - the layer this LayerUI instance is set to

  See Also:

  JLayer.setLayerEventMask(long), installUI(javax.swing.JComponent), uninstallUI(javax.swing.JComponent)

• processMouseMotionEvent

  protected void processMouseMotionEvent(MouseEvent e,
                                         JLayer<? extends V> l)

  Processes mouse motion event occurring on the JLayer or any of its subcomponents.

  This method is not called unless mouse motion events are enabled for the JLayer objects, this LayerUI is set to. Mouse motion events are enabled in the overridden installUI(javax.swing.JComponent) method and should be disabled in the uninstallUI(javax.swing.JComponent) method after that.

   public void installUI(JComponent c) {
      super.installUI(c);
      JLayer l = (JLayer) c;
      l.setLayerEventMask(AWTEvent.MOUSE_MOTION_EVENT_MASK);
   }
  
   public void uninstallUI(JComponent c) {
       super.uninstallUI(c);
       JLayer l = (JLayer) c;
       l.setLayerEventMask(0);
   }
   

  Parameters:

  e - the MouseEvent to be processed

  l - the layer this LayerUI instance is set to

  See Also:

  JLayer.setLayerEventMask(long), installUI(javax.swing.JComponent), uninstallUI(javax.swing.JComponent)

• processMouseWheelEvent

  protected void processMouseWheelEvent(MouseWheelEvent e,
                                        JLayer<? extends V> l)

  Processes mouse wheel event occurring on the JLayer or any of its subcomponents.

  This method is not called unless mouse wheel events are enabled for the JLayer objects, this LayerUI is set to. Mouse wheel events are enabled in the overridden installUI(javax.swing.JComponent) method and should be disabled in the uninstallUI(javax.swing.JComponent) method after that.

   public void installUI(JComponent c) {
      super.installUI(c);
      JLayer l = (JLayer) c;
      l.setLayerEventMask(AWTEvent.MOUSE_WHEEL_EVENT_MASK);
   }
  
   public void uninstallUI(JComponent c) {
       super.uninstallUI(c);
       JLayer l = (JLayer) c;
       l.setLayerEventMask(0);
   }
   

  Parameters:

  e - the MouseEvent to be processed

  l - the layer this LayerUI instance is set to

  See Also:

  JLayer.setLayerEventMask(long), installUI(javax.swing.JComponent), uninstallUI(javax.swing.JComponent)

• processInputMethodEvent

  protected void processInputMethodEvent(InputMethodEvent e,
                                         JLayer<? extends V> l)

  Processes input event occurring on the JLayer or any of its subcomponents.

  This method is not called unless input events are enabled for the JLayer objects, this LayerUI is set to. Input events are enabled in the overridden installUI(javax.swing.JComponent) method and should be disabled in the uninstallUI(javax.swing.JComponent) method after that.

   public void installUI(JComponent c) {
      super.installUI(c);
      JLayer l = (JLayer) c;
      l.setLayerEventMask(AWTEvent.INPUT_METHOD_EVENT_MASK);
   }
  
   public void uninstallUI(JComponent c) {
       super.uninstallUI(c);
       JLayer l = (JLayer) c;
       l.setLayerEventMask(0);
   }
   

  Parameters:

  e - the InputMethodEvent to be processed

  l - the layer this LayerUI instance is set to

  See Also:

  JLayer.setLayerEventMask(long), installUI(javax.swing.JComponent), uninstallUI(javax.swing.JComponent)

• processHierarchyEvent

  protected void processHierarchyEvent(HierarchyEvent e,
                                       JLayer<? extends V> l)

  Processes hierarchy event occurring on the JLayer or any of its subcomponents.

  This method is not called unless hierarchy events are enabled for the JLayer objects, this LayerUI is set to. Hierarchy events are enabled in the overridden installUI(javax.swing.JComponent) method and should be disabled in the uninstallUI(javax.swing.JComponent) method after that.

   public void installUI(JComponent c) {
      super.installUI(c);
      JLayer l = (JLayer) c;
      l.setLayerEventMask(AWTEvent.HIERARCHY_EVENT_MASK);
   }
  
   public void uninstallUI(JComponent c) {
       super.uninstallUI(c);
       JLayer l = (JLayer) c;
       l.setLayerEventMask(0);
   }
   

  Parameters:

  e - the HierarchyEvent to be processed

  l - the layer this LayerUI instance is set to

  See Also:

  JLayer.setLayerEventMask(long), installUI(javax.swing.JComponent), uninstallUI(javax.swing.JComponent)

• processHierarchyBoundsEvent

  protected void processHierarchyBoundsEvent(HierarchyEvent e,
                                             JLayer<? extends V> l)

  Processes hierarchy bounds event occurring on the JLayer or any of its subcomponents.

  This method is not called unless hierarchy bounds events are enabled for the JLayer objects, this LayerUI is set to. Hierarchy bounds events are enabled in the overridden installUI(javax.swing.JComponent) method and should be disabled in the uninstallUI(javax.swing.JComponent) method after that.

   public void installUI(JComponent c) {
      super.installUI(c);
      JLayer l = (JLayer) c;
      l.setLayerEventMask(AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK);
   }
  
   public void uninstallUI(JComponent c) {
       super.uninstallUI(c);
       JLayer l = (JLayer) c;
       l.setLayerEventMask(0);
   }
   

  Parameters:

  e - the HierarchyEvent to be processed

  l - the layer this LayerUI instance is set to

  See Also:

  JLayer.setLayerEventMask(long), installUI(javax.swing.JComponent), uninstallUI(javax.swing.JComponent)

• updateUI

  public void updateUI(JLayer<? extends V> l)

  Invoked when JLayer.updateUI() is called by the JLayer this LayerUI is set to.

  Parameters:

  l - the JLayer which UI is updated

• installUI

  public void installUI(JComponent c)

  Configures the JLayer this LayerUI is set to. The default implementation registers the passed JLayer component as a PropertyChangeListener for the property changes of this LayerUI.

  Overrides:

  installUI in class ComponentUI

  Parameters:

  c - the JLayer component where this UI delegate is being installed

  See Also:

  ComponentUI.uninstallUI(javax.swing.JComponent), JComponent.setUI(javax.swing.plaf.ComponentUI), JComponent.updateUI()

• uninstallUI

  public void uninstallUI(JComponent c)

  Reverses the configuration which was previously set in the installUI(JComponent) method. The default implementation unregisters the passed JLayer component as a PropertyChangeListener for the property changes of this LayerUI.

  Overrides:

  uninstallUI in class ComponentUI

  Parameters:

  c - the component from which this UI delegate is being removed.

  See Also:

  ComponentUI.installUI(javax.swing.JComponent), JComponent.updateUI()

• addPropertyChangeListener

  public void addPropertyChangeListener(PropertyChangeListener listener)

  Adds a PropertyChangeListener to the listener list. The listener is registered for all bound properties of this class.

  If listener is null, no exception is thrown and no action is performed.

  Parameters:

  listener - the property change listener to be added

  See Also:

  removePropertyChangeListener(java.beans.PropertyChangeListener), getPropertyChangeListeners(), addPropertyChangeListener(String, java.beans.PropertyChangeListener)

• removePropertyChangeListener

  public void removePropertyChangeListener(PropertyChangeListener listener)

  Removes a PropertyChangeListener from the listener list. This method should be used to remove PropertyChangeListeners that were registered for all bound properties of this class.

  If listener is null, no exception is thrown and no action is performed.

  Parameters:

  listener - the PropertyChangeListener to be removed

  See Also:

  addPropertyChangeListener(java.beans.PropertyChangeListener), getPropertyChangeListeners(), removePropertyChangeListener(String, PropertyChangeListener)

• getPropertyChangeListeners

  public PropertyChangeListener[] getPropertyChangeListeners()

  Returns an array of all the property change listeners registered on this component.

  Returns:

  all of this ui's PropertyChangeListeners or an empty array if no property change listeners are currently registered

  See Also:

  addPropertyChangeListener(java.beans.PropertyChangeListener), removePropertyChangeListener(java.beans.PropertyChangeListener), getPropertyChangeListeners(String)

• addPropertyChangeListener

  public void addPropertyChangeListener(String propertyName,
                                        PropertyChangeListener listener)

  Adds a PropertyChangeListener to the listener list for a specific property.

  If propertyName or listener is null, no exception is thrown and no action is taken.

  Parameters:

  propertyName - one of the property names listed above

  listener - the property change listener to be added

  See Also:

  removePropertyChangeListener(String, PropertyChangeListener), getPropertyChangeListeners(String), addPropertyChangeListener(String, PropertyChangeListener)

• removePropertyChangeListener

  public void removePropertyChangeListener(String propertyName,
                                           PropertyChangeListener listener)

  Removes a PropertyChangeListener from the listener list for a specific property. This method should be used to remove PropertyChangeListeners that were registered for a specific bound property.

  If propertyName or listener is null, no exception is thrown and no action is taken.

  Parameters:

  propertyName - a valid property name

  listener - the PropertyChangeListener to be removed

  See Also:

  addPropertyChangeListener(String, PropertyChangeListener), getPropertyChangeListeners(String), removePropertyChangeListener(PropertyChangeListener)

• getPropertyChangeListeners

  public PropertyChangeListener[] getPropertyChangeListeners(String propertyName)

  Returns an array of all the listeners which have been associated with the named property.

  Parameters:

  propertyName - The name of the property being listened to

  Returns:

  all of the PropertyChangeListeners associated with the named property; if no such listeners have been added or if propertyName is null, an empty array is returned

  See Also:

  addPropertyChangeListener(String, PropertyChangeListener), removePropertyChangeListener(String, PropertyChangeListener), getPropertyChangeListeners()

• firePropertyChange

  protected void firePropertyChange(String propertyName,
                                    Object oldValue,
                                    Object newValue)

  Support for reporting bound property changes for Object properties. This method can be called when a bound property has changed and it will send the appropriate PropertyChangeEvent to any registered PropertyChangeListeners.

  Parameters:

  propertyName - the property whose value has changed

  oldValue - the property's previous value

  newValue - the property's new value

• applyPropertyChange

  public void applyPropertyChange(PropertyChangeEvent evt,
                                  JLayer<? extends V> l)

  Notifies the LayerUI when any of its property are changed and enables updating every JLayer this LayerUI instance is set to.

  Parameters:

  evt - the PropertyChangeEvent generated by this LayerUI

  l - the JLayer this LayerUI is set to

• getBaseline

  public int getBaseline(JComponent c,
                         int width,
                         int height)

  If the JLayer's view component is not null, this calls the view's getBaseline() method. Otherwise, the default implementation is called.

  Overrides:

  getBaseline in class ComponentUI

  Parameters:

  c - JLayer to return baseline resize behavior for

  width - the width to get the baseline for

  height - the height to get the baseline for

  Returns:

  baseline or a value < 0 indicating there is no reasonable baseline

  See Also:

  JComponent.getBaseline(int,int)

• getBaselineResizeBehavior

  public Component.BaselineResizeBehavior getBaselineResizeBehavior(JComponent c)

  If the JLayer's view component is not null, this returns the result of the view's getBaselineResizeBehavior() method. Otherwise, the default implementation is called.

  Overrides:

  getBaselineResizeBehavior in class ComponentUI

  Parameters:

  c - JLayer to return baseline resize behavior for

  Returns:

  an enum indicating how the baseline changes as the component size changes

  See Also:

  JComponent.getBaseline(int, int)

• doLayout

  public void doLayout(JLayer<? extends V> l)

  Causes the passed instance of JLayer to lay out its components.

  Parameters:

  l - the JLayer component where this UI delegate is being installed

• getPreferredSize

  public Dimension getPreferredSize(JComponent c)

  If the JLayer's view component is not null, this returns the result of the view's getPreferredSize() method. Otherwise, the default implementation is used.

  Overrides:

  getPreferredSize in class ComponentUI

  Parameters:

  c - JLayer to return preferred size for

  Returns:

  preferred size for the passed JLayer

  See Also:

  JComponent.getPreferredSize(), LayoutManager.preferredLayoutSize(java.awt.Container)

• getMinimumSize

  public Dimension getMinimumSize(JComponent c)

  If the JLayer's view component is not null, this returns the result of the view's getMinimalSize() method. Otherwise, the default implementation is used.

  Overrides:

  getMinimumSize in class ComponentUI

  Parameters:

  c - JLayer to return preferred size for

  Returns:

  minimal size for the passed JLayer

  See Also:

  JComponent.getMinimumSize(), LayoutManager.minimumLayoutSize(java.awt.Container), ComponentUI.getPreferredSize(javax.swing.JComponent)

• getMaximumSize

  public Dimension getMaximumSize(JComponent c)

  If the JLayer's view component is not null, this returns the result of the view's getMaximumSize() method. Otherwise, the default implementation is used.

  Overrides:

  getMaximumSize in class ComponentUI

  Parameters:

  c - JLayer to return preferred size for

  Returns:

  maximum size for the passed JLayer

  See Also:

  JComponent.getMaximumSize(), LayoutManager2.maximumLayoutSize(java.awt.Container)

• paintImmediately

  public void paintImmediately(int x,
                               int y,
                               int width,
                               int height,
                               JLayer<? extends V> l)

  Paints the specified region in the JLayer this LayerUI is set to, immediately.

  This method is to be overridden when the dirty region needs to be changed. The default implementation delegates its functionality to JComponent.paintImmediately(int, int, int, int).

  Parameters:

  x - the x value of the region to be painted

  y - the y value of the region to be painted

  width - the width of the region to be painted

  height - the height of the region to be painted

  See Also:

  JComponent.paintImmediately(int, int, int, int)