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	/*
	* Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package javax.swing.plaf;

	import javax.swing.*;
	import java.awt.*;
	import java.awt.event.*;
	import java.beans.PropertyChangeEvent;
	import java.beans.PropertyChangeSupport;
	import java.beans.PropertyChangeListener;
	import java.io.Serializable;

	/**
	* The base class for all {@link javax.swing.JLayer}'s UI delegates.
	* <p>
	* {@link #paint(java.awt.Graphics, javax.swing.JComponent)} method performs the
	* painting of the {@code JLayer}
	* and {@link #eventDispatched(AWTEvent, JLayer)} method is notified
	* about any {@code AWTEvent}s which have been generated by a {@code JLayer}
	* or any of its subcomponents.
	* <p>
	* The {@code LayerUI} differs from the UI delegates of the other components,
	* because it is LookAndFeel independent and is not updated by default when
	* the system LookAndFeel is changed.
	* <p>
	* The subclasses of {@code LayerUI} can either be stateless and shareable
	* by multiple {@code JLayer}s or not shareable.
	*
	* @param <V> one of the super types of {@code JLayer}'s view component
	*
	* @see JLayer#setUI(LayerUI)
	* @see JLayer#setView(Component)
	* @see JLayer#getView()
	* @since 1.7
	*
	* @author Alexander Potochkin
	*/
	public class LayerUI<V extends Component>
	extends ComponentUI implements Serializable {

	private final PropertyChangeSupport propertyChangeSupport =
	new PropertyChangeSupport(this);

	/**
	* Paints the specified component.
	* Subclasses should override this method and use
	* the specified {@code Graphics} object to
	* render the content of the component.
	* <p>
	* The default implementation paints the passed component as is.
	*
	* @param g the {@code Graphics} context in which to paint
	* @param c the component being painted
	*/
	public void paint(Graphics g, JComponent c) {
	c.paint(g);
	}

	/**
	* Processes {@code AWTEvent}s for {@code JLayer}
	* and <b>all its descendants</b> to this {@code LayerUI} instance.
	* <p>
	* To enable the {@code AWTEvent}s of a particular type,
	* you call {@link JLayer#setLayerEventMask}
	* in {@link #installUI(javax.swing.JComponent)}
	* and set the layer event mask to {@code 0}
	* in {@link #uninstallUI(javax.swing.JComponent)} after that.
	* By default this method calls the appropriate
	* {@code process<event type>Event}
	* method for the given class of event.
	* <p>
	* <b>Note:</b> Events are processed only for displayable {@code JLayer}s.
	*
	* @param e the event to be dispatched
	* @param l the layer this LayerUI is set to
	*
	* @see JLayer#setLayerEventMask(long)
	* @see Component#isDisplayable()
	* @see #processComponentEvent
	* @see #processFocusEvent
	* @see #processKeyEvent
	* @see #processMouseEvent
	* @see #processMouseMotionEvent
	* @see #processInputMethodEvent
	* @see #processHierarchyEvent
	* @see #processMouseWheelEvent
	*/
	public void eventDispatched(AWTEvent e, JLayer<? extends V> l){
	if (e instanceof FocusEvent) {
	processFocusEvent((FocusEvent)e, l);

	} else if (e instanceof MouseEvent) {
	switch(e.getID()) {
	case MouseEvent.MOUSE_PRESSED:
	case MouseEvent.MOUSE_RELEASED:
	case MouseEvent.MOUSE_CLICKED:
	case MouseEvent.MOUSE_ENTERED:
	case MouseEvent.MOUSE_EXITED:
	processMouseEvent((MouseEvent)e, l);
	break;
	case MouseEvent.MOUSE_MOVED:
	case MouseEvent.MOUSE_DRAGGED:
	processMouseMotionEvent((MouseEvent)e, l);
	break;
	case MouseEvent.MOUSE_WHEEL:
	processMouseWheelEvent((MouseWheelEvent)e, l);
	break;
	}
	} else if (e instanceof KeyEvent) {
	processKeyEvent((KeyEvent)e, l);
	} else if (e instanceof ComponentEvent) {
	processComponentEvent((ComponentEvent)e, l);
	} else if (e instanceof InputMethodEvent) {
	processInputMethodEvent((InputMethodEvent)e, l);
	} else if (e instanceof HierarchyEvent) {
	switch (e.getID()) {
	case HierarchyEvent.HIERARCHY_CHANGED:
	processHierarchyEvent((HierarchyEvent)e, l);
	break;
	case HierarchyEvent.ANCESTOR_MOVED:
	case HierarchyEvent.ANCESTOR_RESIZED:
	processHierarchyBoundsEvent((HierarchyEvent)e, l);
	break;
	}
	}
	}

	/**
	* Processes component events occurring on the {@link JLayer}
	* or any of its subcomponents.
	* <p>
	* This method is not called unless component events are
	* enabled for the {@code JLayer} objects, this {@code LayerUI} is set to.
	* Component events are enabled in the overridden {@link #installUI} method
	* and should be disabled in the {@link #uninstallUI} method after that.
	* <pre>
	* 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);
	* }
	* </pre>
	*
	* @param e the {@code ComponentEvent} to be processed
	* @param l the layer this {@code LayerUI} instance is set to
	*
	* @see JLayer#setLayerEventMask(long)
	* @see #installUI(javax.swing.JComponent)
	* @see #uninstallUI(javax.swing.JComponent)
	*/
	protected void processComponentEvent(ComponentEvent e, JLayer<? extends V> l) {
	}

	/**
	* Processes focus events occurring on the {@link JLayer}
	* or any of its subcomponents.
	* <p>
	* This method is not called unless focus events are
	* enabled for the {@code JLayer} objects, this {@code LayerUI} is set to.
	* Focus events are enabled in the overridden {@link #installUI} method
	* and should be disabled in the {@link #uninstallUI} method after that.
	* <pre>
	* 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);
	* }
	* </pre>
	*
	* @param e the {@code FocusEvent} to be processed
	* @param l the layer this {@code LayerUI} instance is set to
	*
	* @see JLayer#setLayerEventMask(long)
	* @see #installUI(javax.swing.JComponent)
	* @see #uninstallUI(javax.swing.JComponent)
	*/
	protected void processFocusEvent(FocusEvent e, JLayer<? extends V> l) {
	}

	/**
	* Processes key events occurring on the {@link JLayer}
	* or any of its subcomponents.
	* <p>
	* This method is not called unless key events are
	* enabled for the {@code JLayer} objects, this {@code LayerUI} is set to.
	* Key events are enabled in the overridden {@link #installUI} method
	* and should be disabled in the {@link #uninstallUI} method after that.
	* <pre>
	* 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);
	* }
	* </pre>
	*
	* @param e the {@code KeyEvent} to be processed
	* @param l the layer this {@code LayerUI} instance is set to
	*
	* @see JLayer#setLayerEventMask(long)
	* @see #installUI(javax.swing.JComponent)
	* @see #uninstallUI(javax.swing.JComponent)
	*/
	protected void processKeyEvent(KeyEvent e, JLayer<? extends V> l) {
	}

	/**
	* Processes mouse events occurring on the {@link JLayer}
	* or any of its subcomponents.
	* <p>
	* This method is not called unless mouse events are
	* enabled for the {@code JLayer} objects, this {@code LayerUI} is set to.
	* Mouse events are enabled in the overridden {@link #installUI} method
	* and should be disabled in the {@link #uninstallUI} method after that.
	* <pre>
	* 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);
	* }
	* </pre>
	*
	* @param e the {@code MouseEvent} to be processed
	* @param l the layer this {@code LayerUI} instance is set to
	*
	* @see JLayer#setLayerEventMask(long)
	* @see #installUI(javax.swing.JComponent)
	* @see #uninstallUI(javax.swing.JComponent)
	*/
	protected void processMouseEvent(MouseEvent e, JLayer<? extends V> l) {
	}

	/**
	* Processes mouse motion event occurring on the {@link JLayer}
	* or any of its subcomponents.
	* <p>
	* This method is not called unless mouse motion events are
	* enabled for the {@code JLayer} objects, this {@code LayerUI} is set to.
	* Mouse motion events are enabled in the overridden {@link #installUI} method
	* and should be disabled in the {@link #uninstallUI} method after that.
	* <pre>
	* 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);
	* }
	* </pre>
	*
	* @param e the {@code MouseEvent} to be processed
	* @param l the layer this {@code LayerUI} instance is set to
	*
	* @see JLayer#setLayerEventMask(long)
	* @see #installUI(javax.swing.JComponent)
	* @see #uninstallUI(javax.swing.JComponent)
	*/
	protected void processMouseMotionEvent(MouseEvent e, JLayer<? extends V> l) {
	}

	/**
	* Processes mouse wheel event occurring on the {@link JLayer}
	* or any of its subcomponents.
	* <p>
	* This method is not called unless mouse wheel events are
	* enabled for the {@code JLayer} objects, this {@code LayerUI} is set to.
	* Mouse wheel events are enabled in the overridden {@link #installUI} method
	* and should be disabled in the {@link #uninstallUI} method after that.
	* <pre>
	* 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);
	* }
	* </pre>
	*
	* @param e the {@code MouseEvent} to be processed
	* @param l the layer this {@code LayerUI} instance is set to
	*
	* @see JLayer#setLayerEventMask(long)
	* @see #installUI(javax.swing.JComponent)
	* @see #uninstallUI(javax.swing.JComponent)
	*/
	protected void processMouseWheelEvent(MouseWheelEvent e, JLayer<? extends V> l) {
	}

	/**
	* Processes input event occurring on the {@link JLayer}
	* or any of its subcomponents.
	* <p>
	* This method is not called unless input events are
	* enabled for the {@code JLayer} objects, this {@code LayerUI} is set to.
	* Input events are enabled in the overridden {@link #installUI} method
	* and should be disabled in the {@link #uninstallUI} method after that.
	* <pre>
	* 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);
	* }
	* </pre>
	*
	* @param e the {@code InputMethodEvent} to be processed
	* @param l the layer this {@code LayerUI} instance is set to
	*
	* @see JLayer#setLayerEventMask(long)
	* @see #installUI(javax.swing.JComponent)
	* @see #uninstallUI(javax.swing.JComponent)
	*/
	protected void processInputMethodEvent(InputMethodEvent e, JLayer<? extends V> l) {
	}

	/**
	* Processes hierarchy event occurring on the {@link JLayer}
	* or any of its subcomponents.
	* <p>
	* This method is not called unless hierarchy events are
	* enabled for the {@code JLayer} objects, this {@code LayerUI} is set to.
	* Hierarchy events are enabled in the overridden {@link #installUI} method
	* and should be disabled in the {@link #uninstallUI} method after that.
	* <pre>
	* 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);
	* }
	* </pre>
	*
	* @param e the {@code HierarchyEvent} to be processed
	* @param l the layer this {@code LayerUI} instance is set to
	*
	* @see JLayer#setLayerEventMask(long)
	* @see #installUI(javax.swing.JComponent)
	* @see #uninstallUI(javax.swing.JComponent)
	*/
	protected void processHierarchyEvent(HierarchyEvent e, JLayer<? extends V> l) {
	}

	/**
	* Processes hierarchy bounds event occurring on the {@link JLayer}
	* or any of its subcomponents.
	* <p>
	* This method is not called unless hierarchy bounds events are
	* enabled for the {@code JLayer} objects, this {@code LayerUI} is set to.
	* Hierarchy bounds events are enabled in the overridden {@link #installUI}
	* method and should be disabled in the {@link #uninstallUI} method after that.
	* <pre>
	* 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);
	* }
	* </pre>
	*
	* @param e the {@code HierarchyEvent} to be processed
	* @param l the layer this {@code LayerUI} instance is set to
	*
	* @see JLayer#setLayerEventMask(long)
	* @see #installUI(javax.swing.JComponent)
	* @see #uninstallUI(javax.swing.JComponent)
	*/
	protected void processHierarchyBoundsEvent(HierarchyEvent e, JLayer<? extends V> l) {
	}

	/**
	* Invoked when {@link javax.swing.JLayer#updateUI()} is called
	* by the {@code JLayer} this {@code LayerUI} is set to.
	*
	* @param l the {@code JLayer} which UI is updated
	*/
	public void updateUI(JLayer<? extends V> l){
	}

	/**
	* Configures the {@code JLayer} this {@code LayerUI} is set to.
	* The default implementation registers the passed {@code JLayer} component
	* as a {@code PropertyChangeListener} for the property changes of this {@code LayerUI}.
	*
	* @param c the {@code JLayer} component where this UI delegate is being installed
	*/
	public void installUI(JComponent c) {
	addPropertyChangeListener((JLayer) c);
	}

	/**
	* Reverses the configuration which was previously set
	* in the {@link #installUI(JComponent)} method.
	* The default implementation unregisters the passed {@code JLayer} component
	* as a {@code PropertyChangeListener} for the property changes of this {@code LayerUI}.
	*
	* @param c the component from which this UI delegate is being removed.
	*/
	public void uninstallUI(JComponent c) {
	removePropertyChangeListener((JLayer) c);
	}

	/**
	* Adds a PropertyChangeListener to the listener list. The listener is
	* registered for all bound properties of this class.
	* <p>
	* If {@code listener} is {@code null},
	* no exception is thrown and no action is performed.
	*
	* @param listener the property change listener to be added
	* @see #removePropertyChangeListener
	* @see #getPropertyChangeListeners
	* @see #addPropertyChangeListener(String, java.beans.PropertyChangeListener)
	*/
	public void addPropertyChangeListener(PropertyChangeListener listener) {
	propertyChangeSupport.addPropertyChangeListener(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.
	* <p>
	* If {@code listener} is {@code null},
	* no exception is thrown and no action is performed.
	*
	* @param listener the PropertyChangeListener to be removed
	* @see #addPropertyChangeListener
	* @see #getPropertyChangeListeners
	* @see #removePropertyChangeListener(String, PropertyChangeListener)
	*/
	public void removePropertyChangeListener(PropertyChangeListener listener) {
	propertyChangeSupport.removePropertyChangeListener(listener);
	}

	/**
	* Returns an array of all the property change listeners
	* registered on this component.
	*
	* @return all of this ui's {@code PropertyChangeListener}s
	* or an empty array if no property change
	* listeners are currently registered
	* @see #addPropertyChangeListener
	* @see #removePropertyChangeListener
	* @see #getPropertyChangeListeners(String)
	*/
	public PropertyChangeListener[] getPropertyChangeListeners() {
	return propertyChangeSupport.getPropertyChangeListeners();
	}

	/**
	* Adds a PropertyChangeListener to the listener list for a specific
	* property.
	* <p>
	* If {@code propertyName} or {@code listener} is {@code null},
	* no exception is thrown and no action is taken.
	*
	* @param propertyName one of the property names listed above
	* @param listener the property change listener to be added
	* @see #removePropertyChangeListener(String, PropertyChangeListener)
	* @see #getPropertyChangeListeners(String)
	* @see #addPropertyChangeListener(String, PropertyChangeListener)
	*/
	public void addPropertyChangeListener(String propertyName,
	PropertyChangeListener listener) {
	propertyChangeSupport.addPropertyChangeListener(propertyName, listener);
	}

	/**
	* Removes a {@code PropertyChangeListener} from the listener
	* list for a specific property. This method should be used to remove
	* {@code PropertyChangeListener}s
	* that were registered for a specific bound property.
	* <p>
	* If {@code propertyName} or {@code listener} is {@code null},
	* no exception is thrown and no action is taken.
	*
	* @param propertyName a valid property name
	* @param listener the PropertyChangeListener to be removed
	* @see #addPropertyChangeListener(String, PropertyChangeListener)
	* @see #getPropertyChangeListeners(String)
	* @see #removePropertyChangeListener(PropertyChangeListener)
	*/
	public void removePropertyChangeListener(String propertyName,
	PropertyChangeListener listener) {
	propertyChangeSupport.removePropertyChangeListener(propertyName, listener);
	}

	/**
	* Returns an array of all the listeners which have been associated
	* with the named property.
	*
	* @param propertyName The name of the property being listened to
	* @return all of the {@code PropertyChangeListener}s associated with
	* the named property; if no such listeners have been added or
	* if {@code propertyName} is {@code null}, an empty
	* array is returned
	* @see #addPropertyChangeListener(String, PropertyChangeListener)
	* @see #removePropertyChangeListener(String, PropertyChangeListener)
	* @see #getPropertyChangeListeners
	*/
	public PropertyChangeListener[] getPropertyChangeListeners(String propertyName) {
	return propertyChangeSupport.getPropertyChangeListeners(propertyName);
	}

	/**
	* 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.
	*
	* @param propertyName the property whose value has changed
	* @param oldValue the property's previous value
	* @param newValue the property's new value
	*/
	protected void firePropertyChange(String propertyName,
	Object oldValue, Object newValue) {
	propertyChangeSupport.firePropertyChange(propertyName, oldValue, newValue);
	}

	/**
	* Notifies the {@code LayerUI} when any of its property are changed
	* and enables updating every {@code JLayer}
	* this {@code LayerUI} instance is set to.
	*
	* @param evt the PropertyChangeEvent generated by this {@code LayerUI}
	* @param l the {@code JLayer} this LayerUI is set to
	*/
	public void applyPropertyChange(PropertyChangeEvent evt, JLayer<? extends V> l) {
	}

	/**
	* If the {@code JLayer}'s view component is not {@code null},
	* this calls the view's {@code getBaseline()} method.
	* Otherwise, the default implementation is called.
	*
	* @param c {@code JLayer} to return baseline resize behavior for
	* @param width the width to get the baseline for
	* @param height the height to get the baseline for
	* @return baseline or a value < 0 indicating there is no reasonable
	* baseline
	*/
	public int getBaseline(JComponent c, int width, int height) {
	JLayer l = (JLayer) c;
	if (l.getView() != null) {
	return l.getView().getBaseline(width, height);
	}
	return super.getBaseline(c, width, height);
	}

	/**
	* If the {@code JLayer}'s view component is not {@code null},
	* this returns the result of the view's {@code getBaselineResizeBehavior()} method.
	* Otherwise, the default implementation is called.
	*
	* @param c {@code JLayer} to return baseline resize behavior for
	* @return an enum indicating how the baseline changes as the component
	* size changes
	*/
	public Component.BaselineResizeBehavior getBaselineResizeBehavior(JComponent c) {
	JLayer l = (JLayer) c;
	if (l.getView() != null) {
	return l.getView().getBaselineResizeBehavior();
	}
	return super.getBaselineResizeBehavior(c);
	}

	/**
	* Causes the passed instance of {@code JLayer} to lay out its components.
	*
	* @param l the {@code JLayer} component where this UI delegate is being installed
	*/
	public void doLayout(JLayer<? extends V> l) {
	Component view = l.getView();
	if (view != null) {
	view.setBounds(0, 0, l.getWidth(), l.getHeight());
	}
	Component glassPane = l.getGlassPane();
	if (glassPane != null) {
	glassPane.setBounds(0, 0, l.getWidth(), l.getHeight());
	}
	}

	/**
	* If the {@code JLayer}'s view component is not {@code null},
	* this returns the result of the view's {@code getPreferredSize()} method.
	* Otherwise, the default implementation is used.
	*
	* @param c {@code JLayer} to return preferred size for
	* @return preferred size for the passed {@code JLayer}
	*/
	public Dimension getPreferredSize(JComponent c) {
	JLayer l = (JLayer) c;
	Component view = l.getView();
	if (view != null) {
	return view.getPreferredSize();
	}
	return super.getPreferredSize(c);
	}

	/**
	* If the {@code JLayer}'s view component is not {@code null},
	* this returns the result of the view's {@code getMinimalSize()} method.
	* Otherwise, the default implementation is used.
	*
	* @param c {@code JLayer} to return preferred size for
	* @return minimal size for the passed {@code JLayer}
	*/
	public Dimension getMinimumSize(JComponent c) {
	JLayer l = (JLayer) c;
	Component view = l.getView();
	if (view != null) {
	return view.getMinimumSize();
	}
	return super.getMinimumSize(c);
	}

	/**
	* If the {@code JLayer}'s view component is not {@code null},
	* this returns the result of the view's {@code getMaximumSize()} method.
	* Otherwise, the default implementation is used.
	*
	* @param c {@code JLayer} to return preferred size for
	* @return maximum size for the passed {@code JLayer}
	*/
	public Dimension getMaximumSize(JComponent c) {
	JLayer l = (JLayer) c;
	Component view = l.getView();
	if (view != null) {
	return view.getMaximumSize();
	}
	return super.getMaximumSize(c);
	}

	/**
	* Paints the specified region in the {@code JLayer} this {@code LayerUI} is set to, immediately.
	* <p>
	* This method is to be overridden when the dirty region needs to be changed.
	* The default implementation delegates its functionality to {@link JComponent#paintImmediately(int, int, int, int)}.
	*
	* @param x the x value of the region to be painted
	* @param y the y value of the region to be painted
	* @param width the width of the region to be painted
	* @param height the height of the region to be painted
	*
	* @see JComponent#paintImmediately(int, int, int, int)
	*/
	public void paintImmediately(int x, int y, int width, int height, JLayer<? extends V> l) {
	l.paintImmediately(x, y, width, height);
	}
	}

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