| /* | |
| * Copyright (c) 1995, 2021, 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 java.awt; | |
| import java.awt.event.AdjustmentEvent; | |
| import java.awt.event.AdjustmentListener; | |
| import java.awt.peer.ScrollbarPeer; | |
| import java.io.IOException; | |
| import java.io.ObjectInputStream; | |
| import java.io.ObjectOutputStream; | |
| import java.io.Serial; | |
| import java.util.EventListener; | |
| import javax.accessibility.Accessible; | |
| import javax.accessibility.AccessibleContext; | |
| import javax.accessibility.AccessibleRole; | |
| import javax.accessibility.AccessibleState; | |
| import javax.accessibility.AccessibleStateSet; | |
| import javax.accessibility.AccessibleValue; | |
| /** | |
| * The {@code Scrollbar} class embodies a scroll bar, a | |
| * familiar user-interface object. A scroll bar provides a | |
| * convenient means for allowing a user to select from a | |
| * range of values. The following three vertical | |
| * scroll bars could be used as slider controls to pick | |
| * the red, green, and blue components of a color: | |
| * <p> | |
| * <img src="doc-files/Scrollbar-1.gif" alt="Image shows 3 vertical sliders, | |
| * side-by-side." style="margin: 7px 10px;"> | |
| * <p> | |
| * Each scroll bar in this example could be created with | |
| * code similar to the following: | |
| * | |
| * <hr><blockquote><pre> | |
| * redSlider=new Scrollbar(Scrollbar.VERTICAL, 0, 1, 0, 255); | |
| * add(redSlider); | |
| * </pre></blockquote><hr> | |
| * <p> | |
| * Alternatively, a scroll bar can represent a range of values. For | |
| * example, if a scroll bar is used for scrolling through text, the | |
| * width of the "bubble" (also called the "thumb" or "scroll box") | |
| * can be used to represent the amount of text that is visible. | |
| * Here is an example of a scroll bar that represents a range: | |
| * <p> | |
| * <img src="doc-files/Scrollbar-2.gif" | |
| * alt="Image shows horizontal slider with starting range of 0 and ending range | |
| * of 300. The slider thumb is labeled 60." style="margin: 7px 10px;"> | |
| * <p> | |
| * The value range represented by the bubble in this example | |
| * is the <em>visible amount</em>. The horizontal scroll bar | |
| * in this example could be created with code like the following: | |
| * | |
| * <hr><blockquote><pre> | |
| * ranger = new Scrollbar(Scrollbar.HORIZONTAL, 0, 60, 0, 300); | |
| * add(ranger); | |
| * </pre></blockquote><hr> | |
| * <p> | |
| * Note that the actual maximum value of the scroll bar is the | |
| * {@code maximum} minus the {@code visible amount}. | |
| * In the previous example, because the {@code maximum} is | |
| * 300 and the {@code visible amount} is 60, the actual maximum | |
| * value is 240. The range of the scrollbar track is 0 - 300. | |
| * The left side of the bubble indicates the value of the | |
| * scroll bar. | |
| * <p> | |
| * Normally, the user changes the value of the scroll bar by | |
| * making a gesture with the mouse. For example, the user can | |
| * drag the scroll bar's bubble up and down, or click in the | |
| * scroll bar's unit increment or block increment areas. Keyboard | |
| * gestures can also be mapped to the scroll bar. By convention, | |
| * the <b>Page Up</b> and <b>Page Down</b> | |
| * keys are equivalent to clicking in the scroll bar's block | |
| * increment and block decrement areas. | |
| * <p> | |
| * When the user changes the value of the scroll bar, the scroll bar | |
| * receives an instance of {@code AdjustmentEvent}. | |
| * The scroll bar processes this event, passing it along to | |
| * any registered listeners. | |
| * <p> | |
| * Any object that wishes to be notified of changes to the | |
| * scroll bar's value should implement | |
| * {@code AdjustmentListener}, an interface defined in | |
| * the package {@code java.awt.event}. | |
| * Listeners can be added and removed dynamically by calling | |
| * the methods {@code addAdjustmentListener} and | |
| * {@code removeAdjustmentListener}. | |
| * <p> | |
| * The {@code AdjustmentEvent} class defines five types | |
| * of adjustment event, listed here: | |
| * | |
| * <ul> | |
| * <li>{@code AdjustmentEvent.TRACK} is sent out when the | |
| * user drags the scroll bar's bubble. | |
| * <li>{@code AdjustmentEvent.UNIT_INCREMENT} is sent out | |
| * when the user clicks in the left arrow of a horizontal scroll | |
| * bar, or the top arrow of a vertical scroll bar, or makes the | |
| * equivalent gesture from the keyboard. | |
| * <li>{@code AdjustmentEvent.UNIT_DECREMENT} is sent out | |
| * when the user clicks in the right arrow of a horizontal scroll | |
| * bar, or the bottom arrow of a vertical scroll bar, or makes the | |
| * equivalent gesture from the keyboard. | |
| * <li>{@code AdjustmentEvent.BLOCK_INCREMENT} is sent out | |
| * when the user clicks in the track, to the left of the bubble | |
| * on a horizontal scroll bar, or above the bubble on a vertical | |
| * scroll bar. By convention, the <b>Page Up</b> | |
| * key is equivalent, if the user is using a keyboard that | |
| * defines a <b>Page Up</b> key. | |
| * <li>{@code AdjustmentEvent.BLOCK_DECREMENT} is sent out | |
| * when the user clicks in the track, to the right of the bubble | |
| * on a horizontal scroll bar, or below the bubble on a vertical | |
| * scroll bar. By convention, the <b>Page Down</b> | |
| * key is equivalent, if the user is using a keyboard that | |
| * defines a <b>Page Down</b> key. | |
| * </ul> | |
| * <p> | |
| * The JDK 1.0 event system is supported for backwards | |
| * compatibility, but its use with newer versions of the platform is | |
| * discouraged. The five types of adjustment events introduced | |
| * with JDK 1.1 correspond to the five event types | |
| * that are associated with scroll bars in previous platform versions. | |
| * The following list gives the adjustment event type, | |
| * and the corresponding JDK 1.0 event type it replaces. | |
| * | |
| * <ul> | |
| * <li>{@code AdjustmentEvent.TRACK} replaces | |
| * {@code Event.SCROLL_ABSOLUTE} | |
| * <li>{@code AdjustmentEvent.UNIT_INCREMENT} replaces | |
| * {@code Event.SCROLL_LINE_UP} | |
| * <li>{@code AdjustmentEvent.UNIT_DECREMENT} replaces | |
| * {@code Event.SCROLL_LINE_DOWN} | |
| * <li>{@code AdjustmentEvent.BLOCK_INCREMENT} replaces | |
| * {@code Event.SCROLL_PAGE_UP} | |
| * <li>{@code AdjustmentEvent.BLOCK_DECREMENT} replaces | |
| * {@code Event.SCROLL_PAGE_DOWN} | |
| * </ul> | |
| * <p> | |
| * <b>Note</b>: We recommend using a {@code Scrollbar} | |
| * for value selection only. If you want to implement | |
| * a scrollable component inside a container, we recommend you use | |
| * a {@link ScrollPane ScrollPane}. If you use a | |
| * {@code Scrollbar} for this purpose, you are likely to | |
| * encounter issues with painting, key handling, sizing and | |
| * positioning. | |
| * | |
| * @author Sami Shaio | |
| * @see java.awt.event.AdjustmentEvent | |
| * @see java.awt.event.AdjustmentListener | |
| * @since 1.0 | |
| */ | |
| public class Scrollbar extends Component implements Adjustable, Accessible { | |
| /** | |
| * A constant that indicates a horizontal scroll bar. | |
| */ | |
| public static final int HORIZONTAL = 0; | |
| /** | |
| * A constant that indicates a vertical scroll bar. | |
| */ | |
| public static final int VERTICAL = 1; | |
| /** | |
| * The value of the {@code Scrollbar}. | |
| * This property must be greater than or equal to {@code minimum} | |
| * and less than or equal to | |
| * {@code maximum - visibleAmount} | |
| * | |
| * @serial | |
| * @see #getValue | |
| * @see #setValue | |
| */ | |
| int value; | |
| /** | |
| * The maximum value of the {@code Scrollbar}. | |
| * This value must be greater than the {@code minimum} | |
| * value.<br> | |
| * | |
| * @serial | |
| * @see #getMaximum | |
| * @see #setMaximum | |
| */ | |
| int maximum; | |
| /** | |
| * The minimum value of the {@code Scrollbar}. | |
| * This value must be less than the {@code maximum} | |
| * value.<br> | |
| * | |
| * @serial | |
| * @see #getMinimum | |
| * @see #setMinimum | |
| */ | |
| int minimum; | |
| /** | |
| * The size of the {@code Scrollbar}'s bubble. | |
| * When a scroll bar is used to select a range of values, | |
| * the visibleAmount represents the size of this range. | |
| * Depending on platform, this may be visually indicated | |
| * by the size of the bubble. | |
| * | |
| * @serial | |
| * @see #getVisibleAmount | |
| * @see #setVisibleAmount | |
| */ | |
| int visibleAmount; | |
| /** | |
| * The {@code Scrollbar}'s orientation--being either horizontal | |
| * or vertical. | |
| * This value should be specified when the scrollbar is created.<BR> | |
| * orientation can be either : {@code VERTICAL} or | |
| * {@code HORIZONTAL} only. | |
| * | |
| * @serial | |
| * @see #getOrientation | |
| * @see #setOrientation | |
| */ | |
| int orientation; | |
| /** | |
| * The amount by which the scrollbar value will change when going | |
| * up or down by a line. | |
| * This value must be greater than zero. | |
| * | |
| * @serial | |
| * @see #getLineIncrement | |
| * @see #setLineIncrement | |
| */ | |
| int lineIncrement = 1; | |
| /** | |
| * The amount by which the scrollbar value will change when going | |
| * up or down by a page. | |
| * This value must be greater than zero. | |
| * | |
| * @serial | |
| * @see #getPageIncrement | |
| * @see #setPageIncrement | |
| */ | |
| int pageIncrement = 10; | |
| /** | |
| * The adjusting status of the {@code Scrollbar}. | |
| * True if the value is in the process of changing as a result of | |
| * actions being taken by the user. | |
| * | |
| * @see #getValueIsAdjusting | |
| * @see #setValueIsAdjusting | |
| * @since 1.4 | |
| */ | |
| transient boolean isAdjusting; | |
| transient AdjustmentListener adjustmentListener; | |
| private static final String base = "scrollbar"; | |
| private static int nameCounter = 0; | |
| /** | |
| * Use serialVersionUID from JDK 1.1 for interoperability. | |
| */ | |
| @Serial | |
| private static final long serialVersionUID = 8451667562882310543L; | |
| /** | |
| * Initialize JNI field and method IDs. | |
| */ | |
| private static native void initIDs(); | |
| static { | |
| /* ensure that the necessary native libraries are loaded */ | |
| Toolkit.loadLibraries(); | |
| if (!GraphicsEnvironment.isHeadless()) { | |
| initIDs(); | |
| } | |
| } | |
| /** | |
| * Constructs a new vertical scroll bar. | |
| * The default properties of the scroll bar are listed in | |
| * the following table: | |
| * | |
| * <table class="striped"> | |
| * <caption>Scrollbar default properties</caption> | |
| * <thead> | |
| * <tr> | |
| * <th scope="col">Property | |
| * <th scope="col">Description | |
| * <th scope="col">Default Value | |
| * </thead> | |
| * <tbody> | |
| * <tr> | |
| * <th scope="row">orientation | |
| * <td>indicates whether the scroll bar is vertical or horizontal | |
| * <td>{@code Scrollbar.VERTICAL} | |
| * <tr> | |
| * <th scope="row">value | |
| * <td>value which controls the location of the scroll bar's bubble | |
| * <td>0 | |
| * <tr> | |
| * <th scope="row">visible amount | |
| * <td>visible amount of the scroll bar's range, typically represented | |
| * by the size of the scroll bar's bubble | |
| * <td>10 | |
| * <tr> | |
| * <th scope="row">minimum | |
| * <td>minimum value of the scroll bar | |
| * <td>0 | |
| * <tr> | |
| * <th scope="row">maximum | |
| * <td>maximum value of the scroll bar | |
| * <td>100 | |
| * <tr> | |
| * <th scope="row">unit increment | |
| * <td>amount the value changes when the Line Up or Line Down key is | |
| * pressed, or when the end arrows of the scrollbar are clicked | |
| * <td>1 | |
| * <tr> | |
| * <th scope="row">block increment | |
| * <td>amount the value changes when the Page Up or Page Down key is | |
| * pressed, or when the scrollbar track is clicked<br>on either side of | |
| * the bubble | |
| * <td>10 | |
| * </tbody> | |
| * </table> | |
| * | |
| * @throws HeadlessException if GraphicsEnvironment.isHeadless() | |
| * returns true. | |
| * @see java.awt.GraphicsEnvironment#isHeadless | |
| */ | |
| public Scrollbar() throws HeadlessException { | |
| this(VERTICAL, 0, 10, 0, 100); | |
| } | |
| /** | |
| * Constructs a new scroll bar with the specified orientation. | |
| * <p> | |
| * The {@code orientation} argument must take one of the two | |
| * values {@code Scrollbar.HORIZONTAL}, | |
| * or {@code Scrollbar.VERTICAL}, | |
| * indicating a horizontal or vertical scroll bar, respectively. | |
| * | |
| * @param orientation indicates the orientation of the scroll bar | |
| * @throws IllegalArgumentException when an illegal value for | |
| * the {@code orientation} argument is supplied | |
| * @throws HeadlessException if GraphicsEnvironment.isHeadless() | |
| * returns true. | |
| * @see java.awt.GraphicsEnvironment#isHeadless | |
| */ | |
| public Scrollbar(int orientation) throws HeadlessException { | |
| this(orientation, 0, 10, 0, 100); | |
| } | |
| /** | |
| * Constructs a new scroll bar with the specified orientation, | |
| * initial value, visible amount, and minimum and maximum values. | |
| * <p> | |
| * The {@code orientation} argument must take one of the two | |
| * values {@code Scrollbar.HORIZONTAL}, | |
| * or {@code Scrollbar.VERTICAL}, | |
| * indicating a horizontal or vertical scroll bar, respectively. | |
| * <p> | |
| * The parameters supplied to this constructor are subject to the | |
| * constraints described in {@link #setValues(int, int, int, int)}. | |
| * | |
| * @param orientation indicates the orientation of the scroll bar. | |
| * @param value the initial value of the scroll bar | |
| * @param visible the visible amount of the scroll bar, typically | |
| * represented by the size of the bubble | |
| * @param minimum the minimum value of the scroll bar | |
| * @param maximum the maximum value of the scroll bar | |
| * @throws IllegalArgumentException when an illegal value for | |
| * the {@code orientation} argument is supplied | |
| * @throws HeadlessException if GraphicsEnvironment.isHeadless() | |
| * returns true. | |
| * @see #setValues | |
| * @see java.awt.GraphicsEnvironment#isHeadless | |
| */ | |
| public Scrollbar(int orientation, int value, int visible, int minimum, | |
| int maximum) throws HeadlessException { | |
| GraphicsEnvironment.checkHeadless(); | |
| switch (orientation) { | |
| case HORIZONTAL: | |
| case VERTICAL: | |
| this.orientation = orientation; | |
| break; | |
| default: | |
| throw new IllegalArgumentException("illegal scrollbar orientation"); | |
| } | |
| setValues(value, visible, minimum, maximum); | |
| } | |
| /** | |
| * Constructs a name for this component. Called by {@code getName} | |
| * when the name is {@code null}. | |
| */ | |
| String constructComponentName() { | |
| synchronized (Scrollbar.class) { | |
| return base + nameCounter++; | |
| } | |
| } | |
| /** | |
| * Creates the {@code Scrollbar}'s peer. The peer allows you to modify | |
| * the appearance of the {@code Scrollbar} without changing any of its | |
| * functionality. | |
| */ | |
| public void addNotify() { | |
| synchronized (getTreeLock()) { | |
| if (peer == null) | |
| peer = getComponentFactory().createScrollbar(this); | |
| super.addNotify(); | |
| } | |
| } | |
| /** | |
| * Returns the orientation of this scroll bar. | |
| * | |
| * @return the orientation of this scroll bar, either | |
| * {@code Scrollbar.HORIZONTAL} or | |
| * {@code Scrollbar.VERTICAL} | |
| * @see java.awt.Scrollbar#setOrientation | |
| */ | |
| public int getOrientation() { | |
| return orientation; | |
| } | |
| /** | |
| * Sets the orientation for this scroll bar. | |
| * | |
| * @param orientation the orientation of this scroll bar, either | |
| * {@code Scrollbar.HORIZONTAL} or | |
| * {@code Scrollbar.VERTICAL} | |
| * @see java.awt.Scrollbar#getOrientation | |
| * @throws IllegalArgumentException if the value supplied | |
| * for {@code orientation} is not a | |
| * legal value | |
| * @since 1.1 | |
| */ | |
| public void setOrientation(int orientation) { | |
| synchronized (getTreeLock()) { | |
| if (orientation == this.orientation) { | |
| return; | |
| } | |
| switch (orientation) { | |
| case HORIZONTAL: | |
| case VERTICAL: | |
| this.orientation = orientation; | |
| break; | |
| default: | |
| throw new IllegalArgumentException("illegal scrollbar orientation"); | |
| } | |
| /* Create a new peer with the specified orientation. */ | |
| if (peer != null) { | |
| removeNotify(); | |
| addNotify(); | |
| invalidate(); | |
| } | |
| } | |
| if (accessibleContext != null) { | |
| accessibleContext.firePropertyChange( | |
| AccessibleContext.ACCESSIBLE_STATE_PROPERTY, | |
| ((orientation == VERTICAL) | |
| ? AccessibleState.HORIZONTAL : AccessibleState.VERTICAL), | |
| ((orientation == VERTICAL) | |
| ? AccessibleState.VERTICAL : AccessibleState.HORIZONTAL)); | |
| } | |
| } | |
| /** | |
| * Gets the current value of this scroll bar. | |
| * | |
| * @return the current value of this scroll bar | |
| * @see java.awt.Scrollbar#getMinimum | |
| * @see java.awt.Scrollbar#getMaximum | |
| */ | |
| public int getValue() { | |
| return value; | |
| } | |
| /** | |
| * Sets the value of this scroll bar to the specified value. | |
| * <p> | |
| * If the value supplied is less than the current {@code minimum} | |
| * or greater than the current {@code maximum - visibleAmount}, | |
| * then either {@code minimum} or {@code maximum - visibleAmount} | |
| * is substituted, as appropriate. | |
| * <p> | |
| * Normally, a program should change a scroll bar's | |
| * value only by calling {@code setValues}. | |
| * The {@code setValues} method simultaneously | |
| * and synchronously sets the minimum, maximum, visible amount, | |
| * and value properties of a scroll bar, so that they are | |
| * mutually consistent. | |
| * <p> | |
| * Calling this method does not fire an | |
| * {@code AdjustmentEvent}. | |
| * | |
| * @param newValue the new value of the scroll bar | |
| * @see java.awt.Scrollbar#setValues | |
| * @see java.awt.Scrollbar#getValue | |
| * @see java.awt.Scrollbar#getMinimum | |
| * @see java.awt.Scrollbar#getMaximum | |
| */ | |
| public void setValue(int newValue) { | |
| // Use setValues so that a consistent policy relating | |
| // minimum, maximum, visible amount, and value is enforced. | |
| setValues(newValue, visibleAmount, minimum, maximum); | |
| } | |
| /** | |
| * Gets the minimum value of this scroll bar. | |
| * | |
| * @return the minimum value of this scroll bar | |
| * @see java.awt.Scrollbar#getValue | |
| * @see java.awt.Scrollbar#getMaximum | |
| */ | |
| public int getMinimum() { | |
| return minimum; | |
| } | |
| /** | |
| * Sets the minimum value of this scroll bar. | |
| * <p> | |
| * When {@code setMinimum} is called, the minimum value | |
| * is changed, and other values (including the maximum, the | |
| * visible amount, and the current scroll bar value) | |
| * are changed to be consistent with the new minimum. | |
| * <p> | |
| * Normally, a program should change a scroll bar's minimum | |
| * value only by calling {@code setValues}. | |
| * The {@code setValues} method simultaneously | |
| * and synchronously sets the minimum, maximum, visible amount, | |
| * and value properties of a scroll bar, so that they are | |
| * mutually consistent. | |
| * <p> | |
| * Note that setting the minimum value to {@code Integer.MAX_VALUE} | |
| * will result in the new minimum value being set to | |
| * {@code Integer.MAX_VALUE - 1}. | |
| * | |
| * @param newMinimum the new minimum value for this scroll bar | |
| * @see java.awt.Scrollbar#setValues | |
| * @see java.awt.Scrollbar#setMaximum | |
| * @since 1.1 | |
| */ | |
| public void setMinimum(int newMinimum) { | |
| // No checks are necessary in this method since minimum is | |
| // the first variable checked in the setValues function. | |
| // Use setValues so that a consistent policy relating | |
| // minimum, maximum, visible amount, and value is enforced. | |
| setValues(value, visibleAmount, newMinimum, maximum); | |
| } | |
| /** | |
| * Gets the maximum value of this scroll bar. | |
| * | |
| * @return the maximum value of this scroll bar | |
| * @see java.awt.Scrollbar#getValue | |
| * @see java.awt.Scrollbar#getMinimum | |
| */ | |
| public int getMaximum() { | |
| return maximum; | |
| } | |
| /** | |
| * Sets the maximum value of this scroll bar. | |
| * <p> | |
| * When {@code setMaximum} is called, the maximum value | |
| * is changed, and other values (including the minimum, the | |
| * visible amount, and the current scroll bar value) | |
| * are changed to be consistent with the new maximum. | |
| * <p> | |
| * Normally, a program should change a scroll bar's maximum | |
| * value only by calling {@code setValues}. | |
| * The {@code setValues} method simultaneously | |
| * and synchronously sets the minimum, maximum, visible amount, | |
| * and value properties of a scroll bar, so that they are | |
| * mutually consistent. | |
| * <p> | |
| * Note that setting the maximum value to {@code Integer.MIN_VALUE} | |
| * will result in the new maximum value being set to | |
| * {@code Integer.MIN_VALUE + 1}. | |
| * | |
| * @param newMaximum the new maximum value | |
| * for this scroll bar | |
| * @see java.awt.Scrollbar#setValues | |
| * @see java.awt.Scrollbar#setMinimum | |
| * @since 1.1 | |
| */ | |
| public void setMaximum(int newMaximum) { | |
| // minimum is checked first in setValues, so we need to | |
| // enforce minimum and maximum checks here. | |
| if (newMaximum == Integer.MIN_VALUE) { | |
| newMaximum = Integer.MIN_VALUE + 1; | |
| } | |
| if (minimum >= newMaximum) { | |
| minimum = newMaximum - 1; | |
| } | |
| // Use setValues so that a consistent policy relating | |
| // minimum, maximum, visible amount, and value is enforced. | |
| setValues(value, visibleAmount, minimum, newMaximum); | |
| } | |
| /** | |
| * Gets the visible amount of this scroll bar. | |
| * <p> | |
| * When a scroll bar is used to select a range of values, | |
| * the visible amount is used to represent the range of values | |
| * that are currently visible. The size of the scroll bar's | |
| * bubble (also called a thumb or scroll box), usually gives a | |
| * visual representation of the relationship of the visible | |
| * amount to the range of the scroll bar. | |
| * Note that depending on platform, the value of the visible amount property | |
| * may not be visually indicated by the size of the bubble. | |
| * <p> | |
| * The scroll bar's bubble may not be displayed when it is not | |
| * moveable (e.g. when it takes up the entire length of the | |
| * scroll bar's track, or when the scroll bar is disabled). | |
| * Whether the bubble is displayed or not will not affect | |
| * the value returned by {@code getVisibleAmount}. | |
| * | |
| * @return the visible amount of this scroll bar | |
| * @see java.awt.Scrollbar#setVisibleAmount | |
| * @since 1.1 | |
| */ | |
| public int getVisibleAmount() { | |
| return getVisible(); | |
| } | |
| /** | |
| * Returns the visible amount of this scroll bar. | |
| * | |
| * @return the visible amount of this scroll bar | |
| * @deprecated As of JDK version 1.1, | |
| * replaced by {@code getVisibleAmount()}. | |
| */ | |
| @Deprecated | |
| public int getVisible() { | |
| return visibleAmount; | |
| } | |
| /** | |
| * Sets the visible amount of this scroll bar. | |
| * <p> | |
| * When a scroll bar is used to select a range of values, | |
| * the visible amount is used to represent the range of values | |
| * that are currently visible. The size of the scroll bar's | |
| * bubble (also called a thumb or scroll box), usually gives a | |
| * visual representation of the relationship of the visible | |
| * amount to the range of the scroll bar. | |
| * Note that depending on platform, the value of the visible amount property | |
| * may not be visually indicated by the size of the bubble. | |
| * <p> | |
| * The scroll bar's bubble may not be displayed when it is not | |
| * moveable (e.g. when it takes up the entire length of the | |
| * scroll bar's track, or when the scroll bar is disabled). | |
| * Whether the bubble is displayed or not will not affect | |
| * the value returned by {@code getVisibleAmount}. | |
| * <p> | |
| * If the visible amount supplied is less than {@code one} | |
| * or greater than the current {@code maximum - minimum}, | |
| * then either {@code one} or {@code maximum - minimum} | |
| * is substituted, as appropriate. | |
| * <p> | |
| * Normally, a program should change a scroll bar's | |
| * value only by calling {@code setValues}. | |
| * The {@code setValues} method simultaneously | |
| * and synchronously sets the minimum, maximum, visible amount, | |
| * and value properties of a scroll bar, so that they are | |
| * mutually consistent. | |
| * | |
| * @param newAmount the new visible amount | |
| * @see java.awt.Scrollbar#getVisibleAmount | |
| * @see java.awt.Scrollbar#setValues | |
| * @since 1.1 | |
| */ | |
| public void setVisibleAmount(int newAmount) { | |
| // Use setValues so that a consistent policy relating | |
| // minimum, maximum, visible amount, and value is enforced. | |
| setValues(value, newAmount, minimum, maximum); | |
| } | |
| /** | |
| * Sets the unit increment for this scroll bar. | |
| * <p> | |
| * The unit increment is the value that is added or subtracted | |
| * when the user activates the unit increment area of the | |
| * scroll bar, generally through a mouse or keyboard gesture | |
| * that the scroll bar receives as an adjustment event. | |
| * The unit increment must be greater than zero. | |
| * Attempts to set the unit increment to a value lower than 1 | |
| * will result in a value of 1 being set. | |
| * <p> | |
| * In some operating systems, this property | |
| * can be ignored by the underlying controls. | |
| * | |
| * @param v the amount by which to increment or decrement | |
| * the scroll bar's value | |
| * @see java.awt.Scrollbar#getUnitIncrement | |
| * @since 1.1 | |
| */ | |
| public void setUnitIncrement(int v) { | |
| setLineIncrement(v); | |
| } | |
| /** | |
| * Sets the unit increment for this scroll bar. | |
| * | |
| * @param v the increment value | |
| * | |
| * @deprecated As of JDK version 1.1, | |
| * replaced by {@code setUnitIncrement(int)}. | |
| */ | |
| @Deprecated | |
| public synchronized void setLineIncrement(int v) { | |
| int tmp = (v < 1) ? 1 : v; | |
| if (lineIncrement == tmp) { | |
| return; | |
| } | |
| lineIncrement = tmp; | |
| ScrollbarPeer peer = (ScrollbarPeer)this.peer; | |
| if (peer != null) { | |
| peer.setLineIncrement(lineIncrement); | |
| } | |
| } | |
| /** | |
| * Gets the unit increment for this scrollbar. | |
| * <p> | |
| * The unit increment is the value that is added or subtracted | |
| * when the user activates the unit increment area of the | |
| * scroll bar, generally through a mouse or keyboard gesture | |
| * that the scroll bar receives as an adjustment event. | |
| * The unit increment must be greater than zero. | |
| * <p> | |
| * In some operating systems, this property | |
| * can be ignored by the underlying controls. | |
| * | |
| * @return the unit increment of this scroll bar | |
| * @see java.awt.Scrollbar#setUnitIncrement | |
| * @since 1.1 | |
| */ | |
| public int getUnitIncrement() { | |
| return getLineIncrement(); | |
| } | |
| /** | |
| * Returns the unit increment for this scrollbar. | |
| * | |
| * @return the unit increment for this scrollbar | |
| * @deprecated As of JDK version 1.1, | |
| * replaced by {@code getUnitIncrement()}. | |
| */ | |
| @Deprecated | |
| public int getLineIncrement() { | |
| return lineIncrement; | |
| } | |
| /** | |
| * Sets the block increment for this scroll bar. | |
| * <p> | |
| * The block increment is the value that is added or subtracted | |
| * when the user activates the block increment area of the | |
| * scroll bar, generally through a mouse or keyboard gesture | |
| * that the scroll bar receives as an adjustment event. | |
| * The block increment must be greater than zero. | |
| * Attempts to set the block increment to a value lower than 1 | |
| * will result in a value of 1 being set. | |
| * | |
| * @param v the amount by which to increment or decrement | |
| * the scroll bar's value | |
| * @see java.awt.Scrollbar#getBlockIncrement | |
| * @since 1.1 | |
| */ | |
| public void setBlockIncrement(int v) { | |
| setPageIncrement(v); | |
| } | |
| /** | |
| * Sets the block increment for this scroll bar. | |
| * | |
| * @param v the block increment | |
| * @deprecated As of JDK version 1.1, | |
| * replaced by {@code setBlockIncrement()}. | |
| */ | |
| @Deprecated | |
| public synchronized void setPageIncrement(int v) { | |
| int tmp = (v < 1) ? 1 : v; | |
| if (pageIncrement == tmp) { | |
| return; | |
| } | |
| pageIncrement = tmp; | |
| ScrollbarPeer peer = (ScrollbarPeer)this.peer; | |
| if (peer != null) { | |
| peer.setPageIncrement(pageIncrement); | |
| } | |
| } | |
| /** | |
| * Gets the block increment of this scroll bar. | |
| * <p> | |
| * The block increment is the value that is added or subtracted | |
| * when the user activates the block increment area of the | |
| * scroll bar, generally through a mouse or keyboard gesture | |
| * that the scroll bar receives as an adjustment event. | |
| * The block increment must be greater than zero. | |
| * | |
| * @return the block increment of this scroll bar | |
| * @see java.awt.Scrollbar#setBlockIncrement | |
| * @since 1.1 | |
| */ | |
| public int getBlockIncrement() { | |
| return getPageIncrement(); | |
| } | |
| /** | |
| * Returns the block increment of this scroll bar. | |
| * | |
| * @return the block increment of this scroll bar | |
| * | |
| * @deprecated As of JDK version 1.1, | |
| * replaced by {@code getBlockIncrement()}. | |
| */ | |
| @Deprecated | |
| public int getPageIncrement() { | |
| return pageIncrement; | |
| } | |
| /** | |
| * Sets the values of four properties for this scroll bar: | |
| * {@code value}, {@code visibleAmount}, | |
| * {@code minimum}, and {@code maximum}. | |
| * If the values supplied for these properties are inconsistent | |
| * or incorrect, they will be changed to ensure consistency. | |
| * <p> | |
| * This method simultaneously and synchronously sets the values | |
| * of four scroll bar properties, assuring that the values of | |
| * these properties are mutually consistent. It enforces the | |
| * following constraints: | |
| * {@code maximum} must be greater than {@code minimum}, | |
| * {@code maximum - minimum} must not be greater | |
| * than {@code Integer.MAX_VALUE}, | |
| * {@code visibleAmount} must be greater than zero. | |
| * {@code visibleAmount} must not be greater than | |
| * {@code maximum - minimum}, | |
| * {@code value} must not be less than {@code minimum}, | |
| * and {@code value} must not be greater than | |
| * {@code maximum - visibleAmount} | |
| * <p> | |
| * Calling this method does not fire an | |
| * {@code AdjustmentEvent}. | |
| * | |
| * @param value is the position in the current window | |
| * @param visible is the visible amount of the scroll bar | |
| * @param minimum is the minimum value of the scroll bar | |
| * @param maximum is the maximum value of the scroll bar | |
| * @see #setMinimum | |
| * @see #setMaximum | |
| * @see #setVisibleAmount | |
| * @see #setValue | |
| */ | |
| public void setValues(int value, int visible, int minimum, int maximum) { | |
| int oldValue; | |
| synchronized (this) { | |
| if (minimum == Integer.MAX_VALUE) { | |
| minimum = Integer.MAX_VALUE - 1; | |
| } | |
| if (maximum <= minimum) { | |
| maximum = minimum + 1; | |
| } | |
| long maxMinusMin = (long) maximum - (long) minimum; | |
| if (maxMinusMin > Integer.MAX_VALUE) { | |
| maxMinusMin = Integer.MAX_VALUE; | |
| maximum = minimum + (int) maxMinusMin; | |
| } | |
| if (visible > (int) maxMinusMin) { | |
| visible = (int) maxMinusMin; | |
| } | |
| if (visible < 1) { | |
| visible = 1; | |
| } | |
| if (value < minimum) { | |
| value = minimum; | |
| } | |
| if (value > maximum - visible) { | |
| value = maximum - visible; | |
| } | |
| oldValue = this.value; | |
| this.value = value; | |
| this.visibleAmount = visible; | |
| this.minimum = minimum; | |
| this.maximum = maximum; | |
| ScrollbarPeer peer = (ScrollbarPeer)this.peer; | |
| if (peer != null) { | |
| peer.setValues(value, visibleAmount, minimum, maximum); | |
| } | |
| } | |
| if ((oldValue != value) && (accessibleContext != null)) { | |
| accessibleContext.firePropertyChange( | |
| AccessibleContext.ACCESSIBLE_VALUE_PROPERTY, | |
| Integer.valueOf(oldValue), | |
| Integer.valueOf(value)); | |
| } | |
| } | |
| /** | |
| * Returns true if the value is in the process of changing as a | |
| * result of actions being taken by the user. | |
| * | |
| * @return the value of the {@code valueIsAdjusting} property | |
| * @see #setValueIsAdjusting | |
| * @since 1.4 | |
| */ | |
| public boolean getValueIsAdjusting() { | |
| return isAdjusting; | |
| } | |
| /** | |
| * Sets the {@code valueIsAdjusting} property. | |
| * | |
| * @param b new adjustment-in-progress status | |
| * @see #getValueIsAdjusting | |
| * @since 1.4 | |
| */ | |
| public void setValueIsAdjusting(boolean b) { | |
| boolean oldValue; | |
| synchronized (this) { | |
| oldValue = isAdjusting; | |
| isAdjusting = b; | |
| } | |
| if ((oldValue != b) && (accessibleContext != null)) { | |
| accessibleContext.firePropertyChange( | |
| AccessibleContext.ACCESSIBLE_STATE_PROPERTY, | |
| ((oldValue) ? AccessibleState.BUSY : null), | |
| ((b) ? AccessibleState.BUSY : null)); | |
| } | |
| } | |
| /** | |
| * Adds the specified adjustment listener to receive instances of | |
| * {@code AdjustmentEvent} from this scroll bar. | |
| * If l is {@code null}, no exception is thrown and no | |
| * action is performed. | |
| * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads" | |
| * >AWT Threading Issues</a> for details on AWT's threading model. | |
| * | |
| * @param l the adjustment listener | |
| * @see #removeAdjustmentListener | |
| * @see #getAdjustmentListeners | |
| * @see java.awt.event.AdjustmentEvent | |
| * @see java.awt.event.AdjustmentListener | |
| * @since 1.1 | |
| */ | |
| public synchronized void addAdjustmentListener(AdjustmentListener l) { | |
| if (l == null) { | |
| return; | |
| } | |
| adjustmentListener = AWTEventMulticaster.add(adjustmentListener, l); | |
| newEventsOnly = true; | |
| } | |
| /** | |
| * Removes the specified adjustment listener so that it no longer | |
| * receives instances of {@code AdjustmentEvent} from this scroll bar. | |
| * If l is {@code null}, no exception is thrown and no action | |
| * is performed. | |
| * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads" | |
| * >AWT Threading Issues</a> for details on AWT's threading model. | |
| * | |
| * @param l the adjustment listener | |
| * @see #addAdjustmentListener | |
| * @see #getAdjustmentListeners | |
| * @see java.awt.event.AdjustmentEvent | |
| * @see java.awt.event.AdjustmentListener | |
| * @since 1.1 | |
| */ | |
| public synchronized void removeAdjustmentListener(AdjustmentListener l) { | |
| if (l == null) { | |
| return; | |
| } | |
| adjustmentListener = AWTEventMulticaster.remove(adjustmentListener, l); | |
| } | |
| /** | |
| * Returns an array of all the adjustment listeners | |
| * registered on this scrollbar. | |
| * | |
| * @return all of this scrollbar's {@code AdjustmentListener}s | |
| * or an empty array if no adjustment | |
| * listeners are currently registered | |
| * @see #addAdjustmentListener | |
| * @see #removeAdjustmentListener | |
| * @see java.awt.event.AdjustmentEvent | |
| * @see java.awt.event.AdjustmentListener | |
| * @since 1.4 | |
| */ | |
| public synchronized AdjustmentListener[] getAdjustmentListeners() { | |
| return getListeners(AdjustmentListener.class); | |
| } | |
| /** | |
| * Returns an array of all the objects currently registered | |
| * as <code><em>Foo</em>Listener</code>s | |
| * upon this {@code Scrollbar}. | |
| * <code><em>Foo</em>Listener</code>s are registered using the | |
| * <code>add<em>Foo</em>Listener</code> method. | |
| * <p> | |
| * You can specify the {@code listenerType} argument | |
| * with a class literal, such as | |
| * <code><em>Foo</em>Listener.class</code>. | |
| * For example, you can query a | |
| * {@code Scrollbar c} | |
| * for its mouse listeners with the following code: | |
| * | |
| * <pre>MouseListener[] mls = (MouseListener[])(c.getListeners(MouseListener.class));</pre> | |
| * | |
| * If no such listeners exist, this method returns an empty array. | |
| * | |
| * @param listenerType the type of listeners requested; this parameter | |
| * should specify an interface that descends from | |
| * {@code java.util.EventListener} | |
| * @return an array of all objects registered as | |
| * <code><em>Foo</em>Listener</code>s on this component, | |
| * or an empty array if no such listeners have been added | |
| * @throws ClassCastException if {@code listenerType} | |
| * doesn't specify a class or interface that implements | |
| * {@code java.util.EventListener} | |
| * | |
| * @since 1.3 | |
| */ | |
| public <T extends EventListener> T[] getListeners(Class<T> listenerType) { | |
| EventListener l = null; | |
| if (listenerType == AdjustmentListener.class) { | |
| l = adjustmentListener; | |
| } else { | |
| return super.getListeners(listenerType); | |
| } | |
| return AWTEventMulticaster.getListeners(l, listenerType); | |
| } | |
| // REMIND: remove when filtering is done at lower level | |
| boolean eventEnabled(AWTEvent e) { | |
| if (e.id == AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED) { | |
| if ((eventMask & AWTEvent.ADJUSTMENT_EVENT_MASK) != 0 || | |
| adjustmentListener != null) { | |
| return true; | |
| } | |
| return false; | |
| } | |
| return super.eventEnabled(e); | |
| } | |
| /** | |
| * Processes events on this scroll bar. If the event is an | |
| * instance of {@code AdjustmentEvent}, it invokes the | |
| * {@code processAdjustmentEvent} method. | |
| * Otherwise, it invokes its superclass's | |
| * {@code processEvent} method. | |
| * <p>Note that if the event parameter is {@code null} | |
| * the behavior is unspecified and may result in an | |
| * exception. | |
| * | |
| * @param e the event | |
| * @see java.awt.event.AdjustmentEvent | |
| * @see java.awt.Scrollbar#processAdjustmentEvent | |
| * @since 1.1 | |
| */ | |
| protected void processEvent(AWTEvent e) { | |
| if (e instanceof AdjustmentEvent) { | |
| processAdjustmentEvent((AdjustmentEvent)e); | |
| return; | |
| } | |
| super.processEvent(e); | |
| } | |
| /** | |
| * Processes adjustment events occurring on this | |
| * scrollbar by dispatching them to any registered | |
| * {@code AdjustmentListener} objects. | |
| * <p> | |
| * This method is not called unless adjustment events are | |
| * enabled for this component. Adjustment events are enabled | |
| * when one of the following occurs: | |
| * <ul> | |
| * <li>An {@code AdjustmentListener} object is registered | |
| * via {@code addAdjustmentListener}. | |
| * <li>Adjustment events are enabled via {@code enableEvents}. | |
| * </ul> | |
| * <p>Note that if the event parameter is {@code null} | |
| * the behavior is unspecified and may result in an | |
| * exception. | |
| * | |
| * @param e the adjustment event | |
| * @see java.awt.event.AdjustmentEvent | |
| * @see java.awt.event.AdjustmentListener | |
| * @see java.awt.Scrollbar#addAdjustmentListener | |
| * @see java.awt.Component#enableEvents | |
| * @since 1.1 | |
| */ | |
| protected void processAdjustmentEvent(AdjustmentEvent e) { | |
| AdjustmentListener listener = adjustmentListener; | |
| if (listener != null) { | |
| listener.adjustmentValueChanged(e); | |
| } | |
| } | |
| /** | |
| * Returns a string representing the state of this {@code Scrollbar}. | |
| * This method is intended to be used only for debugging purposes, and the | |
| * content and format of the returned string may vary between | |
| * implementations. The returned string may be empty but may not be | |
| * {@code null}. | |
| * | |
| * @return the parameter string of this scroll bar | |
| */ | |
| protected String paramString() { | |
| return super.paramString() + | |
| ",val=" + value + | |
| ",vis=" + visibleAmount + | |
| ",min=" + minimum + | |
| ",max=" + maximum + | |
| ((orientation == VERTICAL) ? ",vert" : ",horz") + | |
| ",isAdjusting=" + isAdjusting; | |
| } | |
| /* Serialization support. | |
| */ | |
| /** | |
| * The scroll bar's serialized Data Version. | |
| * | |
| * @serial | |
| */ | |
| private int scrollbarSerializedDataVersion = 1; | |
| /** | |
| * Writes default serializable fields to stream. Writes | |
| * a list of serializable {@code AdjustmentListeners} | |
| * as optional data. The non-serializable listeners are | |
| * detected and no attempt is made to serialize them. | |
| * | |
| * @param s the {@code ObjectOutputStream} to write | |
| * @throws IOException if an I/O error occurs | |
| * @serialData {@code null} terminated sequence of 0 | |
| * or more pairs; the pair consists of a {@code String} | |
| * and an {@code Object}; the {@code String} indicates | |
| * the type of object and is one of the following: | |
| * {@code adjustmentListenerK} indicating an | |
| * {@code AdjustmentListener} object | |
| * | |
| * @see AWTEventMulticaster#save(ObjectOutputStream, String, EventListener) | |
| * @see java.awt.Component#adjustmentListenerK | |
| * @see #readObject(ObjectInputStream) | |
| */ | |
| @Serial | |
| private void writeObject(ObjectOutputStream s) | |
| throws IOException | |
| { | |
| s.defaultWriteObject(); | |
| AWTEventMulticaster.save(s, adjustmentListenerK, adjustmentListener); | |
| s.writeObject(null); | |
| } | |
| /** | |
| * Reads the {@code ObjectInputStream} and if | |
| * it isn't {@code null} adds a listener to | |
| * receive adjustment events fired by the | |
| * {@code Scrollbar}. | |
| * Unrecognized keys or values will be ignored. | |
| * | |
| * @param s the {@code ObjectInputStream} to read | |
| * @throws ClassNotFoundException if the class of a serialized object could | |
| * not be found | |
| * @throws IOException if an I/O error occurs | |
| * @throws HeadlessException if {@code GraphicsEnvironment.isHeadless()} | |
| * returns {@code true} | |
| * @see java.awt.GraphicsEnvironment#isHeadless | |
| * @see #writeObject(ObjectOutputStream) | |
| */ | |
| @Serial | |
| private void readObject(ObjectInputStream s) | |
| throws ClassNotFoundException, IOException, HeadlessException | |
| { | |
| GraphicsEnvironment.checkHeadless(); | |
| s.defaultReadObject(); | |
| Object keyOrNull; | |
| while(null != (keyOrNull = s.readObject())) { | |
| String key = ((String)keyOrNull).intern(); | |
| if (adjustmentListenerK == key) | |
| addAdjustmentListener((AdjustmentListener)(s.readObject())); | |
| else // skip value for unrecognized key | |
| s.readObject(); | |
| } | |
| } | |
| ///////////////// | |
| // Accessibility support | |
| //////////////// | |
| /** | |
| * Gets the {@code AccessibleContext} associated with this | |
| * {@code Scrollbar}. For scrollbars, the | |
| * {@code AccessibleContext} takes the form of an | |
| * {@code AccessibleAWTScrollBar}. A new | |
| * {@code AccessibleAWTScrollBar} instance is created if necessary. | |
| * | |
| * @return an {@code AccessibleAWTScrollBar} that serves as the | |
| * {@code AccessibleContext} of this {@code ScrollBar} | |
| * @since 1.3 | |
| */ | |
| public AccessibleContext getAccessibleContext() { | |
| if (accessibleContext == null) { | |
| accessibleContext = new AccessibleAWTScrollBar(); | |
| } | |
| return accessibleContext; | |
| } | |
| /** | |
| * This class implements accessibility support for the | |
| * {@code Scrollbar} class. It provides an implementation of | |
| * the Java Accessibility API appropriate to scrollbar | |
| * user-interface elements. | |
| * @since 1.3 | |
| */ | |
| protected class AccessibleAWTScrollBar extends AccessibleAWTComponent | |
| implements AccessibleValue | |
| { | |
| /** | |
| * Use serialVersionUID from JDK 1.3 for interoperability. | |
| */ | |
| @Serial | |
| private static final long serialVersionUID = -344337268523697807L; | |
| /** | |
| * Constructs an {@code AccessibleAWTScrollBar}. | |
| */ | |
| protected AccessibleAWTScrollBar() {} | |
| /** | |
| * Get the state set of this object. | |
| * | |
| * @return an instance of {@code AccessibleState} | |
| * containing the current state of the object | |
| * @see AccessibleState | |
| */ | |
| public AccessibleStateSet getAccessibleStateSet() { | |
| AccessibleStateSet states = super.getAccessibleStateSet(); | |
| if (getValueIsAdjusting()) { | |
| states.add(AccessibleState.BUSY); | |
| } | |
| if (getOrientation() == VERTICAL) { | |
| states.add(AccessibleState.VERTICAL); | |
| } else { | |
| states.add(AccessibleState.HORIZONTAL); | |
| } | |
| return states; | |
| } | |
| /** | |
| * Get the role of this object. | |
| * | |
| * @return an instance of {@code AccessibleRole} | |
| * describing the role of the object | |
| */ | |
| public AccessibleRole getAccessibleRole() { | |
| return AccessibleRole.SCROLL_BAR; | |
| } | |
| /** | |
| * Get the {@code AccessibleValue} associated with this | |
| * object. In the implementation of the Java Accessibility | |
| * API for this class, return this object, which is | |
| * responsible for implementing the | |
| * {@code AccessibleValue} interface on behalf of itself. | |
| * | |
| * @return this object | |
| */ | |
| public AccessibleValue getAccessibleValue() { | |
| return this; | |
| } | |
| /** | |
| * Get the accessible value of this object. | |
| * | |
| * @return The current value of this object. | |
| */ | |
| public Number getCurrentAccessibleValue() { | |
| return Integer.valueOf(getValue()); | |
| } | |
| /** | |
| * Set the value of this object as a Number. | |
| * | |
| * @return True if the value was set. | |
| */ | |
| public boolean setCurrentAccessibleValue(Number n) { | |
| if (n instanceof Integer) { | |
| setValue(n.intValue()); | |
| return true; | |
| } else { | |
| return false; | |
| } | |
| } | |
| /** | |
| * Get the minimum accessible value of this object. | |
| * | |
| * @return The minimum value of this object. | |
| */ | |
| public Number getMinimumAccessibleValue() { | |
| return Integer.valueOf(getMinimum()); | |
| } | |
| /** | |
| * Get the maximum accessible value of this object. | |
| * | |
| * @return The maximum value of this object. | |
| */ | |
| public Number getMaximumAccessibleValue() { | |
| return Integer.valueOf(getMaximum()); | |
| } | |
| } // AccessibleAWTScrollBar | |
| } |