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1084 lines
28 KiB
Java
1084 lines
28 KiB
Java
/* Copyright (C) 1999, 2000, 2002 Free Software Foundation
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.awt;
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import java.awt.event.*;
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import java.io.PrintStream;
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import java.io.PrintWriter;
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import java.util.EventListener;
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import java.awt.peer.ComponentPeer;
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import java.awt.peer.ContainerPeer;
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import java.awt.peer.LightweightPeer;
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/* A somewhat incomplete class. */
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public class Container extends Component
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{
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/* Serialized fields from the serialization spec. */
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int ncomponents;
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Component[] component;
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LayoutManager layoutMgr;
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/* LightweightDispatcher dispatcher; */ // wtf?
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Dimension maxSize;
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int containerSerializedDataVersion;
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/* Anything else is non-serializable, and should be declared "transient". */
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transient ContainerListener containerListener;
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/**
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* Default constructor for subclasses.
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*/
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public Container()
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{
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}
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/**
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* Returns the number of components in this container.
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*
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* @return The number of components in this container.
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*/
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public int getComponentCount()
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{
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return ncomponents;
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}
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/**
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* Returns the number of components in this container.
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*
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* @return The number of components in this container.
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*
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* @deprecated This method is deprecated in favor of
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* <code>getComponentCount()</code>.
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*/
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public int countComponents()
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{
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return ncomponents;
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}
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/**
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* Returns the component at the specified index.
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*
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* @param index The index of the component to retrieve.
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*
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* @return The requested component.
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*
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* @exception ArrayIndexOutOfBoundsException If the specified index is not
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* valid.
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*/
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public Component getComponent (int n)
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{
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if (n < 0 || n >= ncomponents)
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throw new ArrayIndexOutOfBoundsException("no such component");
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return component[n];
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}
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/**
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* Returns an array of the components in this container.
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*
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* @return The components in this container.
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*/
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public Component[] getComponents()
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{
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Component[] result = new Component[ncomponents];
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if (ncomponents > 0)
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System.arraycopy(component, 0, result, 0, ncomponents);
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return result;
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}
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/**
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* Returns the insets for this container, which is the space used for
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* borders, the margin, etc.
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*
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* @return The insets for this container.
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*/
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public Insets getInsets()
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{
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if (peer == null)
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return new Insets(0, 0, 0, 0);
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return ((ContainerPeer) peer).getInsets();
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}
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/**
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* Returns the insets for this container, which is the space used for
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* borders, the margin, etc.
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*
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* @return The insets for this container.
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*
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* @deprecated This method is deprecated in favor of
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* <code>getInsets()</code>.
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*/
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public Insets insets()
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{
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return getInsets();
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}
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/**
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* Adds the specified component to this container at the end of the
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* component list.
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*
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* @param component The component to add to the container.
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*
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* @return The same component that was added.
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*/
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public Component add (Component comp)
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{
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addImpl (comp, null, -1);
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return comp;
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}
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/**
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* Adds the specified component to the container at the end of the
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* component list. This method should not be used. Instead, use
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* <code>add(Component, Object</code>.
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*
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* @param name FIXME
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* @param component The component to be added.
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*
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* @return The same component that was added.
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*/
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public Component add (String name, Component comp)
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{
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addImpl (comp, name, -1);
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return comp;
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}
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/**
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* Adds the specified component to this container at the specified index
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* in the component list.
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*
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* @param component The component to be added.
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* @param index The index in the component list to insert this child
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* at, or -1 to add at the end of the list.
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*
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* @return The same component that was added.
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*
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* @param throws ArrayIndexOutOfBounds If the specified index is invalid.
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*/
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public Component add (Component comp, int index)
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{
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addImpl (comp, null, index);
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return comp;
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}
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/**
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* Adds the specified component to this container at the end of the
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* component list. The layout manager will use the specified constraints
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* when laying out this component.
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*
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* @param component The component to be added to this container.
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* @param constraints The layout constraints for this component.
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*/
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public void add (Component comp, Object constraints)
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{
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addImpl (comp, constraints, -1);
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}
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/**
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* Adds the specified component to this container at the specified index
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* in the component list. The layout manager will use the specified
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* constraints when layout out this component.
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*
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* @param component The component to be added.
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* @param constraints The layout constraints for this component.
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* @param index The index in the component list to insert this child
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* at, or -1 to add at the end of the list.
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*
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* @param throws ArrayIndexOutOfBounds If the specified index is invalid.
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*/
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public void add (Component comp, Object constraints, int index)
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{
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addImpl (comp, constraints, index);
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}
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/**
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* This method is called by all the <code>add()</code> methods to perform
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* the actual adding of the component. Subclasses who wish to perform
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* their own processing when a component is added should override this
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* method. Any subclass doing this must call the superclass version of
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* this method in order to ensure proper functioning of the container.
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*
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* @param component The component to be added.
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* @param constraints The layout constraints for this component, or
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* <code>null</code> if there are no constraints.
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* @param index The index in the component list to insert this child
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* at, or -1 to add at the end of the list.
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*
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* @param throws ArrayIndexOutOfBounds If the specified index is invalid.
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*/
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protected void addImpl (Component comp, Object constraints, int index)
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{
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if (index > ncomponents
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|| (index < 0 && index != -1)
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|| comp instanceof Window
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|| (comp instanceof Container
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&& ((Container) comp).isAncestorOf (this)))
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throw new IllegalArgumentException ();
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// Reparent component, and make sure component is instantiated if
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// we are.
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if (comp.parent != null)
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comp.parent.remove (comp);
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comp.parent = this;
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if (peer != null)
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{
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comp.addNotify ();
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if (comp.isLightweight())
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enableEvents(comp.eventMask);
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}
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invalidate ();
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if (component == null)
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component = new Component[4]; // FIXME, better initial size?
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// This isn't the most efficient implementation. We could do less
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// copying when growing the array. It probably doesn't matter.
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if (ncomponents >= component.length)
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{
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int nl = component.length * 2;
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Component[] c = new Component[nl];
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System.arraycopy (component, 0, c, 0, ncomponents);
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component = c;
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}
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if (index == -1)
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component[ncomponents++] = comp;
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else
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{
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System.arraycopy (component, index, component, index + 1,
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ncomponents - index);
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component[index] = comp;
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++ncomponents;
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}
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// Notify the layout manager.
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if (layoutMgr != null)
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{
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if (layoutMgr instanceof LayoutManager2)
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{
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LayoutManager2 lm2 = (LayoutManager2) layoutMgr;
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lm2.addLayoutComponent (comp, constraints);
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}
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else if (constraints instanceof String)
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layoutMgr.addLayoutComponent ((String) constraints, comp);
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else
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layoutMgr.addLayoutComponent (null, comp);
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}
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// Post event to notify of adding the container.
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ContainerEvent ce = new ContainerEvent (this,
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ContainerEvent.COMPONENT_ADDED,
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comp);
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getToolkit().getSystemEventQueue().postEvent(ce);
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}
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/**
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* Removes the component at the specified index from this container.
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*
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* @param index The index of the component to remove.
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*/
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public void remove (int index)
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{
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Component r = component[index];
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r.removeNotify ();
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System.arraycopy (component, index + 1, component, index,
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ncomponents - index - 1);
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component[--ncomponents] = null;
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invalidate ();
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if (layoutMgr != null)
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layoutMgr.removeLayoutComponent (r);
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// Post event to notify of adding the container.
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ContainerEvent ce = new ContainerEvent (this,
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ContainerEvent.COMPONENT_REMOVED,
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r);
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getToolkit().getSystemEventQueue().postEvent(ce);
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}
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/**
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* Removes the specified component from this container.
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*
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* @return component The component to remove from this container.
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*/
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public void remove (Component comp)
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{
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for (int i = 0; i < ncomponents; ++i)
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{
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if (component[i] == comp)
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{
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remove (i);
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break;
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}
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}
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}
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/**
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* Removes all components from this container.
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*/
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public void removeAll()
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{
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while (ncomponents > 0)
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remove (0);
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}
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/**
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* Returns the current layout manager for this container.
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*
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* @return The layout manager for this container.
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*/
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public LayoutManager getLayout()
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{
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return layoutMgr;
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}
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/**
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* Sets the layout manager for this container to the specified layout
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* manager.
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*
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* @param mgr The new layout manager for this container.
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*/
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public void setLayout(LayoutManager mgr)
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{
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layoutMgr = mgr;
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invalidate ();
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}
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/**
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* Layout the components in this container.
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*/
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public void doLayout()
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{
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if (layoutMgr != null)
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layoutMgr.layoutContainer (this);
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}
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/**
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* Layout the components in this container.
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*
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* @deprecated This method is deprecated in favor of
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* <code>doLayout()</code>.
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*/
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public void layout()
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{
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doLayout();
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}
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/**
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* Invalidates this container to indicate that it (and all parent
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* containers) need to be laid out.
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*/
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public void invalidate()
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{
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super.invalidate ();
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}
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/**
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* Re-lays out the components in this container.
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*/
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public void validate()
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{
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// FIXME: use the tree lock?
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synchronized (this)
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{
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if (! isValid ())
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{
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validateTree ();
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}
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}
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}
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/**
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* Recursively validates the container tree, recomputing any invalid
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* layouts.
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*/
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protected void validateTree()
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{
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if (valid)
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return;
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ContainerPeer cPeer = null;
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if ((peer != null) && !(peer instanceof LightweightPeer))
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{
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cPeer = (ContainerPeer) peer;
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cPeer.beginValidate();
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}
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doLayout ();
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for (int i = 0; i < ncomponents; ++i)
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{
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Component comp = component[i];
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if (! comp.isValid ())
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{
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if (comp instanceof Container)
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{
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((Container) comp).validateTree();
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}
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else
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{
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component[i].validate();
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}
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}
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}
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/* children will call invalidate() when they are layed out. It
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is therefore imporant that valid is not set to true
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before after the children has been layed out. */
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valid = true;
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if (cPeer != null)
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cPeer.endValidate();
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}
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public void setFont(Font f)
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{
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super.setFont(f);
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// FIXME, should invalidate all children with font == null
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}
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/**
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* Returns the preferred size of this container.
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*
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* @return The preferred size of this container.
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*/
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public Dimension getPreferredSize()
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{
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if (layoutMgr != null)
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return layoutMgr.preferredLayoutSize (this);
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else
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return super.getPreferredSize ();
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}
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/**
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* Returns the preferred size of this container.
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*
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* @return The preferred size of this container.
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*
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* @deprecated This method is deprecated in favor of
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* <code>getPreferredSize()</code>.
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*/
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public Dimension preferredSize()
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{
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return getPreferredSize();
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}
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/**
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* Returns the minimum size of this container.
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*
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* @return The minimum size of this container.
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*/
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public Dimension getMinimumSize()
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{
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if (layoutMgr != null)
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return layoutMgr.minimumLayoutSize (this);
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else
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return super.getMinimumSize ();
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}
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/**
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* Returns the minimum size of this container.
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*
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* @return The minimum size of this container.
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*
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* @deprecated This method is deprecated in favor of
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* <code>getMinimumSize()</code>.
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*/
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public Dimension minimumSize()
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{
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return getMinimumSize();
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}
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|
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/**
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* Returns the maximum size of this container.
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*
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* @return The maximum size of this container.
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*/
|
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public Dimension getMaximumSize()
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{
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if (layoutMgr != null && layoutMgr instanceof LayoutManager2)
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{
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LayoutManager2 lm2 = (LayoutManager2) layoutMgr;
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return lm2.maximumLayoutSize (this);
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}
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else
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return super.getMaximumSize ();
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}
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|
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/**
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* Returns the preferred alignment along the X axis. This is a value
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* between 0 and 1 where 0 represents alignment flush left and
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* 1 means alignment flush right, and 0.5 means centered.
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*
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* @return The preferred alignment along the X axis.
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*/
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public float getAlignmentX()
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{
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if (layoutMgr instanceof LayoutManager2)
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{
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LayoutManager2 lm2 = (LayoutManager2) layoutMgr;
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return lm2.getLayoutAlignmentX (this);
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}
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else
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return super.getAlignmentX();
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}
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|
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/**
|
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* Returns the preferred alignment along the Y axis. This is a value
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* between 0 and 1 where 0 represents alignment flush top and
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* 1 means alignment flush bottom, and 0.5 means centered.
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*
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* @return The preferred alignment along the Y axis.
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*/
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public float getAlignmentY()
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{
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if (layoutMgr instanceof LayoutManager2)
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{
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LayoutManager2 lm2 = (LayoutManager2) layoutMgr;
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return lm2.getLayoutAlignmentY (this);
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}
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else
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return super.getAlignmentY();
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}
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|
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/**
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* Paints this container. The implementation of this method in this
|
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* class forwards to any lightweight components in this container. If
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* this method is subclassed, this method should still be invoked as
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* a superclass method so that lightweight components are properly
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* drawn.
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*
|
|
* @param graphics The graphics context for this paint job.
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|
*/
|
|
public void paint(Graphics g)
|
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{
|
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if (!isShowing())
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return;
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super.paint(g);
|
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visitChildren(g, GfxPaintVisitor.INSTANCE, true);
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}
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|
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/**
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* Perform a graphics operation on the children of this container.
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|
* For each applicable child, the visitChild() method will be called
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* to perform the graphics operation.
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|
*
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|
* @param gfx The graphics object that will be used to derive new
|
|
* graphics objects for the children.
|
|
*
|
|
* @param visitor Object encapsulating the graphics operation that
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* should be performed.
|
|
*
|
|
* @param lightweightOnly If true, only lightweight components will
|
|
* be visited.
|
|
*/
|
|
private void visitChildren(Graphics gfx, GfxVisitor visitor,
|
|
boolean lightweightOnly)
|
|
{
|
|
// FIXME: do locking
|
|
|
|
for (int i = 0; i < ncomponents; ++i)
|
|
{
|
|
Component comp = component[i];
|
|
boolean applicable = comp.isVisible()
|
|
&& (comp.isLightweight() || !lightweightOnly);
|
|
|
|
if (applicable)
|
|
visitChild(gfx, visitor, comp);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Perform a graphics operation on a child. A translated and clipped
|
|
* graphics object will be created, and the visit() method of the
|
|
* visitor will be called to perform the operation.
|
|
*
|
|
* @param gfx The graphics object that will be used to derive new
|
|
* graphics objects for the child.
|
|
*
|
|
* @param visitor Object encapsulating the graphics operation that
|
|
* should be performed.
|
|
*
|
|
* @param comp The child component that should be visited.
|
|
*/
|
|
private void visitChild(Graphics gfx, GfxVisitor visitor,
|
|
Component comp)
|
|
{
|
|
Rectangle bounds = comp.getBounds();
|
|
Rectangle clip = gfx.getClipBounds().intersection(bounds);
|
|
|
|
if (clip.isEmpty()) return;
|
|
|
|
Graphics gfx2 = gfx.create();
|
|
gfx2.setClip(clip.x, clip.y, clip.width, clip.height);
|
|
gfx2.translate(bounds.x, bounds.y);
|
|
|
|
visitor.visit(comp, gfx2);
|
|
}
|
|
|
|
/**
|
|
* Updates this container. The implementation of this method in this
|
|
* class forwards to any lightweight components in this container. If
|
|
* this method is subclassed, this method should still be invoked as
|
|
* a superclass method so that lightweight components are properly
|
|
* drawn.
|
|
*
|
|
* @param graphics The graphics context for this update.
|
|
*/
|
|
public void update(Graphics g)
|
|
{
|
|
super.update(g);
|
|
}
|
|
|
|
/**
|
|
* Prints this container. The implementation of this method in this
|
|
* class forwards to any lightweight components in this container. If
|
|
* this method is subclassed, this method should still be invoked as
|
|
* a superclass method so that lightweight components are properly
|
|
* drawn.
|
|
*
|
|
* @param graphics The graphics context for this print job.
|
|
*/
|
|
public void print(Graphics g)
|
|
{
|
|
super.print(g);
|
|
visitChildren(g, GfxPrintVisitor.INSTANCE, true);
|
|
}
|
|
|
|
/**
|
|
* Paints all of the components in this container.
|
|
*
|
|
* @param graphics The graphics context for this paint job.
|
|
*/
|
|
public void paintComponents(Graphics g)
|
|
{
|
|
super.paint(g);
|
|
visitChildren(g, GfxPaintAllVisitor.INSTANCE, true);
|
|
}
|
|
|
|
/**
|
|
* Prints all of the components in this container.
|
|
*
|
|
* @param graphics The graphics context for this print job.
|
|
*/
|
|
public void printComponents(Graphics g)
|
|
{
|
|
super.paint(g);
|
|
visitChildren(g, GfxPrintAllVisitor.INSTANCE, true);
|
|
}
|
|
|
|
void dispatchEventImpl(AWTEvent e)
|
|
{
|
|
if ((e.id <= ContainerEvent.CONTAINER_LAST
|
|
&& e.id >= ContainerEvent.CONTAINER_FIRST)
|
|
&& (containerListener != null
|
|
|| (eventMask & AWTEvent.CONTAINER_EVENT_MASK) != 0))
|
|
processEvent(e);
|
|
else
|
|
super.dispatchEventImpl(e);
|
|
}
|
|
|
|
/**
|
|
* Adds the specified container listener to this object's list of
|
|
* container listeners.
|
|
*
|
|
* @param listener The listener to add.
|
|
*/
|
|
public synchronized void addContainerListener(ContainerListener l)
|
|
{
|
|
containerListener = AWTEventMulticaster.add (containerListener, l);
|
|
}
|
|
|
|
/**
|
|
* Removes the specified container listener from this object's list of
|
|
* container listeners.
|
|
*
|
|
* @param listener The listener to remove.
|
|
*/
|
|
public synchronized void removeContainerListener(ContainerListener l)
|
|
{
|
|
containerListener = AWTEventMulticaster.remove(containerListener, l);
|
|
}
|
|
|
|
/** @since 1.3 */
|
|
public EventListener[] getListeners(Class listenerType)
|
|
{
|
|
if (listenerType == ContainerListener.class)
|
|
return getListenersImpl(listenerType, containerListener);
|
|
else return super.getListeners(listenerType);
|
|
}
|
|
|
|
/**
|
|
* Processes the specified event. This method calls
|
|
* <code>processContainerEvent()</code> if this method is a
|
|
* <code>ContainerEvent</code>, otherwise it calls the superclass
|
|
* method.
|
|
*
|
|
* @param event The event to be processed.
|
|
*/
|
|
protected void processEvent(AWTEvent e)
|
|
{
|
|
if (e instanceof ContainerEvent)
|
|
processContainerEvent((ContainerEvent) e);
|
|
else super.processEvent(e);
|
|
}
|
|
|
|
/**
|
|
* Called when a container event occurs if container events are enabled.
|
|
* This method calls any registered listeners.
|
|
*
|
|
* @param event The event that occurred.
|
|
*/
|
|
protected void processContainerEvent(ContainerEvent e)
|
|
{
|
|
if (containerListener == null)
|
|
return;
|
|
switch (e.id)
|
|
{
|
|
case ContainerEvent.COMPONENT_ADDED:
|
|
containerListener.componentAdded(e);
|
|
break;
|
|
|
|
case ContainerEvent.COMPONENT_REMOVED:
|
|
containerListener.componentRemoved(e);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* AWT 1.0 event processor.
|
|
*
|
|
* @param event The event that occurred.
|
|
*
|
|
* @deprecated This method is deprecated in favor of
|
|
* <code>dispatchEvent()</code>.
|
|
*/
|
|
public void deliverEvent(Event e)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Returns the component located at the specified point. This is done
|
|
* by checking whether or not a child component claims to contain this
|
|
* point. The first child component that does is returned. If no
|
|
* child component claims the point, the container itself is returned,
|
|
* unless the point does not exist within this container, in which
|
|
* case <code>null</code> is returned.
|
|
*
|
|
* @param x The X coordinate of the point.
|
|
* @param y The Y coordinate of the point.
|
|
*
|
|
* @return The component containing the specified point, or
|
|
* <code>null</code> if there is no such point.
|
|
*/
|
|
public Component getComponentAt (int x, int y)
|
|
{
|
|
if (! contains (x, y))
|
|
return null;
|
|
for (int i = 0; i < ncomponents; ++i)
|
|
{
|
|
// Ignore invisible children...
|
|
if (!component[i].isVisible())
|
|
continue;
|
|
|
|
int x2 = x - component[i].x;
|
|
int y2 = y - component[i].y;
|
|
if (component[i].contains (x2, y2))
|
|
return component[i];
|
|
}
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Returns the component located at the specified point. This is done
|
|
* by checking whether or not a child component claims to contain this
|
|
* point. The first child component that does is returned. If no
|
|
* child component claims the point, the container itself is returned,
|
|
* unless the point does not exist within this container, in which
|
|
* case <code>null</code> is returned.
|
|
*
|
|
* @param point The point to return the component at.
|
|
*
|
|
* @return The component containing the specified point, or <code>null</code>
|
|
* if there is no such point.
|
|
*
|
|
* @deprecated This method is deprecated in favor of
|
|
* <code>getComponentAt(int, int)</code>.
|
|
*/
|
|
public Component locate(int x, int y)
|
|
{
|
|
return getComponentAt(x, y);
|
|
}
|
|
|
|
/**
|
|
* Returns the component located at the specified point. This is done
|
|
* by checking whether or not a child component claims to contain this
|
|
* point. The first child component that does is returned. If no
|
|
* child component claims the point, the container itself is returned,
|
|
* unless the point does not exist within this container, in which
|
|
* case <code>null</code> is returned.
|
|
*
|
|
* @param point The point to return the component at.
|
|
*
|
|
* @return The component containing the specified point, or <code>null</code>
|
|
* if there is no such point.
|
|
*/
|
|
public Component getComponentAt(Point p)
|
|
{
|
|
return getComponentAt(p.x, p.y);
|
|
}
|
|
|
|
public Component findComponentAt (int x, int y)
|
|
{
|
|
if (! contains (x, y))
|
|
return null;
|
|
|
|
for (int i = 0; i < ncomponents; ++i)
|
|
{
|
|
// Ignore invisible children...
|
|
if (!component[i].isVisible())
|
|
continue;
|
|
|
|
int x2 = x - component[i].x;
|
|
int y2 = y - component[i].y;
|
|
// We don't do the contains() check right away because
|
|
// findComponentAt would redundantly do it first thing.
|
|
if (component[i] instanceof Container)
|
|
{
|
|
Container k = (Container) component[i];
|
|
Component r = k.findComponentAt (x2, y2);
|
|
if (r != null)
|
|
return r;
|
|
}
|
|
else if (component[i].contains (x2, y2))
|
|
return component[i];
|
|
}
|
|
|
|
return this;
|
|
}
|
|
|
|
public Component findComponentAt(Point p)
|
|
{
|
|
return findComponentAt(p.x, p.y);
|
|
}
|
|
|
|
/**
|
|
* Called when this container is added to another container to inform it
|
|
* to create its peer. Peers for any child components will also be
|
|
* created.
|
|
*/
|
|
public void addNotify ()
|
|
{
|
|
if (peer == null)
|
|
{
|
|
addNotifyContainerChildren ();
|
|
super.addNotify();
|
|
}
|
|
}
|
|
|
|
private void addNotifyContainerChildren()
|
|
{
|
|
for (int i = ncomponents; --i >= 0; )
|
|
{
|
|
component[i].addNotify();
|
|
if (component[i].isLightweight())
|
|
enableEvents(component[i].eventMask);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Called when this container is removed from its parent container to
|
|
* inform it to destroy its peer. This causes the peers of all child
|
|
* component to be destroyed as well.
|
|
*/
|
|
public void removeNotify()
|
|
{
|
|
for (int i = 0; i < ncomponents; ++i)
|
|
component[i].removeNotify ();
|
|
super.removeNotify();
|
|
}
|
|
|
|
/**
|
|
* Tests whether or not the specified component is contained within
|
|
* this components subtree.
|
|
*
|
|
* @param component The component to test.
|
|
*
|
|
* @return <code>true</code> if this container is an ancestor of the
|
|
* specified component, <code>false</code>.
|
|
*/
|
|
public boolean isAncestorOf (Component comp)
|
|
{
|
|
for (;;)
|
|
{
|
|
if (comp == null)
|
|
return false;
|
|
if (comp == this)
|
|
return true;
|
|
comp = comp.getParent();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns a string representing the state of this container for
|
|
* debugging purposes.
|
|
*
|
|
* @return A string representing the state of this container.
|
|
*/
|
|
protected String paramString()
|
|
{
|
|
String param = super.paramString();
|
|
if (layoutMgr != null)
|
|
param = param + "," + layoutMgr.getClass().getName();
|
|
|
|
return param;
|
|
}
|
|
|
|
/**
|
|
* Writes a listing of this container to the specified stream starting
|
|
* at the specified indentation point.
|
|
*
|
|
* @param stream The <code>PrintStream</code> to write to.
|
|
* @param indent The indentation point.
|
|
*/
|
|
public void list (PrintStream out, int indent)
|
|
{
|
|
super.list (out, indent);
|
|
for (int i = 0; i < ncomponents; ++i)
|
|
component[i].list (out, indent + 2);
|
|
}
|
|
|
|
/**
|
|
* Writes a listing of this container to the specified stream starting
|
|
* at the specified indentation point.
|
|
*
|
|
* @param stream The <code>PrintWriter</code> to write to.
|
|
* @param indent The indentation point.
|
|
*/
|
|
public void list(PrintWriter out, int indent)
|
|
{
|
|
super.list (out, indent);
|
|
for (int i = 0; i < ncomponents; ++i)
|
|
component[i].list (out, indent + 2);
|
|
}
|
|
|
|
|
|
/* The following classes are used in concert with the
|
|
visitChildren() method to implement all the graphics operations
|
|
that requires traversal of the containment hierarchy. */
|
|
|
|
abstract static class GfxVisitor
|
|
{
|
|
public abstract void visit(Component c, Graphics gfx);
|
|
}
|
|
|
|
static class GfxPaintVisitor extends GfxVisitor
|
|
{
|
|
public void visit(Component c, Graphics gfx) { c.paint(gfx); }
|
|
public static final GfxVisitor INSTANCE = new GfxPaintVisitor();
|
|
}
|
|
|
|
static class GfxPrintVisitor extends GfxVisitor
|
|
{
|
|
public void visit(Component c, Graphics gfx) { c.print(gfx); }
|
|
public static final GfxVisitor INSTANCE = new GfxPrintVisitor();
|
|
}
|
|
|
|
static class GfxPaintAllVisitor extends GfxVisitor
|
|
{
|
|
public void visit(Component c, Graphics gfx) { c.paintAll(gfx); }
|
|
public static final GfxVisitor INSTANCE = new GfxPaintAllVisitor();
|
|
}
|
|
|
|
static class GfxPrintAllVisitor extends GfxVisitor
|
|
{
|
|
public void visit(Component c, Graphics gfx) { c.printAll(gfx); }
|
|
public static final GfxVisitor INSTANCE = new GfxPrintAllVisitor();
|
|
}
|
|
|
|
// This is used to implement Component.transferFocus.
|
|
Component findNextFocusComponent (Component child)
|
|
{
|
|
int start, end;
|
|
if (child != null)
|
|
{
|
|
for (start = 0; start < ncomponents; ++start)
|
|
{
|
|
if (component[start] == child)
|
|
break;
|
|
}
|
|
end = start;
|
|
// This special case lets us be sure to terminate.
|
|
if (end == 0)
|
|
end = ncomponents;
|
|
++start;
|
|
}
|
|
else
|
|
{
|
|
start = 0;
|
|
end = ncomponents;
|
|
}
|
|
|
|
for (int j = start; j != end; ++j)
|
|
{
|
|
if (j >= ncomponents)
|
|
{
|
|
// The JCL says that we should wrap here. However, that
|
|
// seems wrong. To me it seems that focus order should be
|
|
// global within in given window. So instead if we reach
|
|
// the end we try to look in our parent, if we have one.
|
|
if (parent != null)
|
|
return parent.findNextFocusComponent (this);
|
|
j -= ncomponents;
|
|
}
|
|
if (component[j] instanceof Container)
|
|
{
|
|
Component c = component[j];
|
|
c = c.findNextFocusComponent (null);
|
|
if (c != null)
|
|
return c;
|
|
}
|
|
else if (component[j].isFocusTraversable ())
|
|
return component[j];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|