Java example source code file (AccessibleState.java)

This example Java source code file (AccessibleState.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

accessiblebundle, accessiblestate, active, armed, editable, enabled, expanded, focusable, iconified, indeterminate, modal, multiselectable, opaque, selected, util

The AccessibleState.java Java example source code

/*
 * Copyright (c) 1997, 2004, 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.accessibility;

import java.util.Vector;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

/**
 * <P>Class AccessibleState describes a component's particular state.  The actual
 * state of the component is defined as an AccessibleStateSet, which is a
 * composed set of AccessibleStates.
 * <p>The toDisplayString method allows you to obtain the localized string
 * for a locale independent key from a predefined ResourceBundle for the
 * keys defined in this class.
 * <p>The constants in this class present a strongly typed enumeration
 * of common object roles.  A public constructor for this class has been
 * purposely omitted and applications should use one of the constants
 * from this class.  If the constants in this class are not sufficient
 * to describe the role of an object, a subclass should be generated
 * from this class and it should provide constants in a similar manner.
 *
 * @author      Willie Walker
 * @author      Peter Korn
 */
public class AccessibleState extends AccessibleBundle {

    // If you add or remove anything from here, make sure you
    // update AccessibleResourceBundle.java.

    /**
     * Indicates a window is currently the active window.  This includes
     * windows, dialogs, frames, etc.  In addition, this state is used
     * to indicate the currently active child of a component such as a
     * list, table, or tree.  For example, the active child of a list
     * is the child that is drawn with a rectangle around it.
     * @see AccessibleRole#WINDOW
     * @see AccessibleRole#FRAME
     * @see AccessibleRole#DIALOG
     */
    public static final AccessibleState ACTIVE
            = new AccessibleState("active");

    /**
     * Indicates this object is currently pressed.  This is usually
     * associated with buttons and indicates the user has pressed a
     * mouse button while the pointer was over the button and has
     * not yet released the mouse button.
     * @see AccessibleRole#PUSH_BUTTON
     */
    public static final AccessibleState PRESSED
            = new AccessibleState("pressed");

    /**
     * Indicates that the object is armed.  This is usually used on buttons
     * that have been pressed but not yet released, and the mouse pointer
     * is still over the button.
     * @see AccessibleRole#PUSH_BUTTON
     */
    public static final AccessibleState ARMED
            = new AccessibleState("armed");

    /**
     * Indicates the current object is busy.  This is usually used on objects
     * such as progress bars, sliders, or scroll bars to indicate they are
     * in a state of transition.
     * @see AccessibleRole#PROGRESS_BAR
     * @see AccessibleRole#SCROLL_BAR
     * @see AccessibleRole#SLIDER
     */
    public static final AccessibleState BUSY
            = new AccessibleState("busy");

    /**
     * Indicates this object is currently checked.  This is usually used on
     * objects such as toggle buttons, radio buttons, and check boxes.
     * @see AccessibleRole#TOGGLE_BUTTON
     * @see AccessibleRole#RADIO_BUTTON
     * @see AccessibleRole#CHECK_BOX
     */
    public static final AccessibleState CHECKED
            = new AccessibleState("checked");

    /**
     * Indicates the user can change the contents of this object.  This
     * is usually used primarily for objects that allow the user to
     * enter text.  Other objects, such as scroll bars and sliders,
     * are automatically editable if they are enabled.
     * @see #ENABLED
     */
    public static final AccessibleState EDITABLE
            = new AccessibleState("editable");

    /**
     * Indicates this object allows progressive disclosure of its children.
     * This is usually used with hierarchical objects such as trees and
     * is often paired with the EXPANDED or COLLAPSED states.
     * @see #EXPANDED
     * @see #COLLAPSED
     * @see AccessibleRole#TREE
     */
    public static final AccessibleState EXPANDABLE
            = new AccessibleState("expandable");

    /**
     * Indicates this object is collapsed.  This is usually paired with the
     * EXPANDABLE state and is used on objects that provide progressive
     * disclosure such as trees.
     * @see #EXPANDABLE
     * @see #EXPANDED
     * @see AccessibleRole#TREE
     */
    public static final AccessibleState COLLAPSED
            = new AccessibleState("collapsed");

    /**
     * Indicates this object is expanded.  This is usually paired with the
     * EXPANDABLE state and is used on objects that provide progressive
     * disclosure such as trees.
     * @see #EXPANDABLE
     * @see #COLLAPSED
     * @see AccessibleRole#TREE
     */
    public static final AccessibleState EXPANDED
            = new AccessibleState("expanded");

    /**
     * Indicates this object is enabled.  The absence of this state from an
     * object's state set indicates this object is not enabled.  An object
     * that is not enabled cannot be manipulated by the user.  In a graphical
     * display, it is usually grayed out.
     */
    public static final AccessibleState ENABLED
            = new AccessibleState("enabled");

    /**
     * Indicates this object can accept keyboard focus, which means all
     * events resulting from typing on the keyboard will normally be
     * passed to it when it has focus.
     * @see #FOCUSED
     */
    public static final AccessibleState FOCUSABLE
            = new AccessibleState("focusable");

    /**
     * Indicates this object currently has the keyboard focus.
     * @see #FOCUSABLE
     */
    public static final AccessibleState FOCUSED
            = new AccessibleState("focused");

    /**
     * Indicates this object is minimized and is represented only by an
     * icon.  This is usually only associated with frames and internal
     * frames.
     * @see AccessibleRole#FRAME
     * @see AccessibleRole#INTERNAL_FRAME
     */
    public static final AccessibleState ICONIFIED
            = new AccessibleState("iconified");

    /**
     * Indicates something must be done with this object before the
     * user can interact with an object in a different window.  This
     * is usually associated only with dialogs.
     * @see AccessibleRole#DIALOG
     */
    public static final AccessibleState MODAL
            = new AccessibleState("modal");

    /**
     * Indicates this object paints every pixel within its
     * rectangular region. A non-opaque component paints only some of
     * its pixels, allowing the pixels underneath it to "show through".
     * A component that does not fully paint its pixels therefore
     * provides a degree of transparency.
     * @see Accessible#getAccessibleContext
     * @see AccessibleContext#getAccessibleComponent
     * @see AccessibleComponent#getBounds
     */
    public static final AccessibleState OPAQUE
            = new AccessibleState("opaque");

    /**
     * Indicates the size of this object is not fixed.
     * @see Accessible#getAccessibleContext
     * @see AccessibleContext#getAccessibleComponent
     * @see AccessibleComponent#getSize
     * @see AccessibleComponent#setSize
     */
    public static final AccessibleState RESIZABLE
            = new AccessibleState("resizable");


    /**
     * Indicates this object allows more than one of its children to
     * be selected at the same time.
     * @see Accessible#getAccessibleContext
     * @see AccessibleContext#getAccessibleSelection
     * @see AccessibleSelection
     */
    public static final AccessibleState MULTISELECTABLE
            = new AccessibleState("multiselectable");

    /**
     * Indicates this object is the child of an object that allows its
     * children to be selected, and that this child is one of those
     * children that can be selected.
     * @see #SELECTED
     * @see Accessible#getAccessibleContext
     * @see AccessibleContext#getAccessibleSelection
     * @see AccessibleSelection
     */
    public static final AccessibleState SELECTABLE
            = new AccessibleState("selectable");

    /**
     * Indicates this object is the child of an object that allows its
     * children to be selected, and that this child is one of those
     * children that has been selected.
     * @see #SELECTABLE
     * @see Accessible#getAccessibleContext
     * @see AccessibleContext#getAccessibleSelection
     * @see AccessibleSelection
     */
    public static final AccessibleState SELECTED
            = new AccessibleState("selected");

    /**
     * Indicates this object, the object's parent, the object's parent's
     * parent, and so on, are all visible.  Note that this does not
     * necessarily mean the object is painted on the screen.  It might
     * be occluded by some other showing object.
     * @see #VISIBLE
     */
    public static final AccessibleState SHOWING
            = new AccessibleState("showing");

    /**
     * Indicates this object is visible.  Note: this means that the
     * object intends to be visible; however, it may not in fact be
     * showing on the screen because one of the objects that this object
     * is contained by is not visible.
     * @see #SHOWING
     */
    public static final AccessibleState VISIBLE
            = new AccessibleState("visible");

    /**
     * Indicates the orientation of this object is vertical.  This is
     * usually associated with objects such as scrollbars, sliders, and
     * progress bars.
     * @see #VERTICAL
     * @see AccessibleRole#SCROLL_BAR
     * @see AccessibleRole#SLIDER
     * @see AccessibleRole#PROGRESS_BAR
     */
    public static final AccessibleState VERTICAL
            = new AccessibleState("vertical");

    /**
     * Indicates the orientation of this object is horizontal.  This is
     * usually associated with objects such as scrollbars, sliders, and
     * progress bars.
     * @see #HORIZONTAL
     * @see AccessibleRole#SCROLL_BAR
     * @see AccessibleRole#SLIDER
     * @see AccessibleRole#PROGRESS_BAR
     */
    public static final AccessibleState HORIZONTAL
            = new AccessibleState("horizontal");

    /**
     * Indicates this (text) object can contain only a single line of text
     */
    public static final AccessibleState SINGLE_LINE
            = new AccessibleState("singleline");

    /**
     * Indicates this (text) object can contain multiple lines of text
     */
    public static final AccessibleState MULTI_LINE
            = new AccessibleState("multiline");

    /**
     * Indicates this object is transient.  An assistive technology should
     * not add a PropertyChange listener to an object with transient state,
     * as that object will never generate any events.  Transient objects
     * are typically created to answer Java Accessibility method queries,
     * but otherwise do not remain linked to the underlying object (for
     * example, those objects underneath lists, tables, and trees in Swing,
     * where only one actual UI Component does shared rendering duty for
     * all of the data objects underneath the actual list/table/tree elements).
     *
     * @since 1.5
     *
     */
    public static final AccessibleState TRANSIENT
            = new AccessibleState("transient");

    /**
     * Indicates this object is responsible for managing its
     * subcomponents.  This is typically used for trees and tables
     * that have a large number of subcomponents and where the
     * objects are created only when needed and otherwise remain virtual.
     * The application should not manage the subcomponents directly.
     *
     * @since 1.5
     */
    public static final AccessibleState MANAGES_DESCENDANTS
            = new AccessibleState ("managesDescendants");

    /**
     * Indicates that the object state is indeterminate.  An example
     * is selected text that is partially bold and partially not
     * bold. In this case the attributes associated with the selected
     * text are indeterminate.
     *
     * @since 1.5
     */
    public static final AccessibleState INDETERMINATE
           = new AccessibleState ("indeterminate");

    /**
     * A state indicating that text is truncated by a bounding rectangle
     * and that some of the text is not displayed on the screen.  An example
     * is text in a spreadsheet cell that is truncated by the bounds of
     * the cell.
     *
     * @since 1.5
     */
    static public final AccessibleState TRUNCATED
           =  new AccessibleState("truncated");

    /**
     * Creates a new AccessibleState using the given locale independent key.
     * This should not be a public method.  Instead, it is used to create
     * the constants in this file to make it a strongly typed enumeration.
     * Subclasses of this class should enforce similar policy.
     * <p>
     * The key String should be a locale independent key for the state.
     * It is not intended to be used as the actual String to display
     * to the user.  To get the localized string, use toDisplayString.
     *
     * @param key the locale independent name of the state.
     * @see AccessibleBundle#toDisplayString
     */
    protected AccessibleState(String key) {
        this.key = key;
    }
}