You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
134 lines
3.2 KiB
134 lines
3.2 KiB
/*
|
|
* Copyright (c) 1995, 2007, Oracle and/or its affiliates. All rights reserved.
|
|
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
package java.awt;
|
|
|
|
import javax.accessibility.*;
|
|
|
|
/**
|
|
* <code>Panel</code> is the simplest container class. A panel
|
|
* provides space in which an application can attach any other
|
|
* component, including other panels.
|
|
* <p>
|
|
* The default layout manager for a panel is the
|
|
* <code>FlowLayout</code> layout manager.
|
|
*
|
|
* @author Sami Shaio
|
|
* @see java.awt.FlowLayout
|
|
* @since JDK1.0
|
|
*/
|
|
public class Panel extends Container implements Accessible {
|
|
private static final String base = "panel";
|
|
private static int nameCounter = 0;
|
|
|
|
/*
|
|
* JDK 1.1 serialVersionUID
|
|
*/
|
|
private static final long serialVersionUID = -2728009084054400034L;
|
|
|
|
/**
|
|
* Creates a new panel using the default layout manager.
|
|
* The default layout manager for all panels is the
|
|
* <code>FlowLayout</code> class.
|
|
*/
|
|
public Panel() {
|
|
this(new FlowLayout());
|
|
}
|
|
|
|
/**
|
|
* Creates a new panel with the specified layout manager.
|
|
* @param layout the layout manager for this panel.
|
|
* @since JDK1.1
|
|
*/
|
|
public Panel(LayoutManager layout) {
|
|
setLayout(layout);
|
|
}
|
|
|
|
/**
|
|
* Construct a name for this component. Called by getName() when the
|
|
* name is null.
|
|
*/
|
|
String constructComponentName() {
|
|
synchronized (Panel.class) {
|
|
return base + nameCounter++;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates the Panel's peer. The peer allows you to modify the
|
|
* appearance of the panel without changing its functionality.
|
|
*/
|
|
|
|
public void addNotify() {
|
|
synchronized (getTreeLock()) {
|
|
if (peer == null)
|
|
peer = getToolkit().createPanel(this);
|
|
super.addNotify();
|
|
}
|
|
}
|
|
|
|
/////////////////
|
|
// Accessibility support
|
|
////////////////
|
|
|
|
/**
|
|
* Gets the AccessibleContext associated with this Panel.
|
|
* For panels, the AccessibleContext takes the form of an
|
|
* AccessibleAWTPanel.
|
|
* A new AccessibleAWTPanel instance is created if necessary.
|
|
*
|
|
* @return an AccessibleAWTPanel that serves as the
|
|
* AccessibleContext of this Panel
|
|
* @since 1.3
|
|
*/
|
|
public AccessibleContext getAccessibleContext() {
|
|
if (accessibleContext == null) {
|
|
accessibleContext = new AccessibleAWTPanel();
|
|
}
|
|
return accessibleContext;
|
|
}
|
|
|
|
/**
|
|
* This class implements accessibility support for the
|
|
* <code>Panel</code> class. It provides an implementation of the
|
|
* Java Accessibility API appropriate to panel user-interface elements.
|
|
* @since 1.3
|
|
*/
|
|
protected class AccessibleAWTPanel extends AccessibleAWTContainer {
|
|
|
|
private static final long serialVersionUID = -6409552226660031050L;
|
|
|
|
/**
|
|
* Get the role of this object.
|
|
*
|
|
* @return an instance of AccessibleRole describing the role of the
|
|
* object
|
|
*/
|
|
public AccessibleRole getAccessibleRole() {
|
|
return AccessibleRole.PANEL;
|
|
}
|
|
}
|
|
|
|
}
|