Module java.desktop

Package javax.swing

Class JScrollPane.ScrollBar

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JScrollBar

javax.swing.JScrollPane.ScrollBar

所有已实现的接口:

Adjustable, ImageObserver, MenuContainer, Serializable, Accessible, UIResource

封闭类:

JScrollPane

       protected class JScrollPane.ScrollBar extends JScrollBar implements UIResource
      

默认情况下，JScrollPane创建的滚动条是此类的实例。 Scrollbar覆盖了getUnitIncrement和getBlockIncrement方法，以便，如果视口的视图是Scrollable，则会要求视图计算这些值。除非已明确设置了单位/块增量。

警告: 该类的序列化对象将不兼容未来的Swing版本。当前的序列化支持适用于短期存储或在运行相同Swing版本的应用程序之间的RMI。从1.4开始，已将对所有JavaBeans的长期存储支持添加到java.beans包中。请参阅XMLEncoder。

参见:

• Scrollable
• JScrollPane.createVerticalScrollBar()
• JScrollPane.createHorizontalScrollBar()

Nested Class Summary

Nested classes/interfaces declared in class javax.swing.JScrollBar

JScrollBar.AccessibleJScrollBar

Nested classes/interfaces declared in class javax.swing.JComponent

JComponent.AccessibleJComponent

Nested classes/interfaces declared in class java.awt.Container

Container.AccessibleAWTContainer

Nested classes/interfaces declared in class java.awt.Component

Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

Fields declared in class javax.swing.JScrollBar

blockIncrement, model, orientation, unitIncrement

Fields declared in class javax.swing.JComponent

listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields declared in class java.awt.Component

accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields declared in interface java.awt.Adjustable

HORIZONTAL, NO_ORIENTATION, VERTICAL

Fields declared in interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Constructors

Constructor	Description
ScrollBar(int orientation)	使用指定方向创建滚动条。

Method Summary

Modifier and Type	Method	Description
int	getBlockIncrement(int direction)	如果视口的视图是Scrollable对象，则计算滚动的块增量。
int	getUnitIncrement(int direction)	如果视口的视图是Scrollable对象，则计算滚动的单位增量。
void	setBlockIncrement(int blockIncrement)	调用超类以设置值，并将blockIncrementSet实例变量重置为true。
void	setUnitIncrement(int unitIncrement)	调用超类以设置值，并将unitIncrementSet实例变量重置为true。

Methods declared in class javax.swing.JScrollBar

addAdjustmentListener, fireAdjustmentValueChanged, getAccessibleContext, getAdjustmentListeners, getBlockIncrement, getMaximum, getMaximumSize, getMinimum, getMinimumSize, getModel, getOrientation, getUI, getUIClassID, getUnitIncrement, getValue, getValueIsAdjusting, getVisibleAmount, paramString, removeAdjustmentListener, setEnabled, setMaximum, setMinimum, setModel, setOrientation, setUI, setValue, setValueIsAdjusting, setValues, setVisibleAmount, updateUI

Methods declared in class javax.swing.JComponent

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods declared in class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate, validateTree

Methods declared in class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setMixingCutoutShape, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

ScrollBar

             public ScrollBar(int orientation)
            

使用指定方向创建滚动条。选项包括：

• ScrollPaneConstants.VERTICAL
• ScrollPaneConstants.HORIZONTAL

参数:

orientation - 指定上述合法方向值之一的整数

自版本:

1.4

Method Details

setUnitIncrement

             public void setUnitIncrement(int unitIncrement)
            

调用超类以设置值，并将unitIncrementSet实例变量重置为true。

指定者:

setUnitIncrement 在接口 Adjustable中

覆盖:

setUnitIncrement 在类 JScrollBar中

参数:

unitIncrement - 新的单位增量值，以像素为单位

参见:

• JScrollBar.getUnitIncrement(int)

getUnitIncrement

             public int getUnitIncrement(int direction)
            

如果视口的视图是Scrollable对象，则计算滚动的单位增量。否则返回super.getUnitIncrement。

覆盖:

getUnitIncrement 在类 JScrollBar中

参数:

direction - 小于零表示向上/左滚动，大于零表示向下/右滚动

返回:

一个整数，以像素为单位，包含单位增量

参见:

• Scrollable.getScrollableUnitIncrement(java.awt.Rectangle, int, int)

setBlockIncrement

             public void setBlockIncrement(int blockIncrement)
            

调用超类以设置值，并将blockIncrementSet实例变量重置为true。

指定者:

setBlockIncrement 在接口 Adjustable中

覆盖:

setBlockIncrement 在类 JScrollBar中

参数:

blockIncrement - 新的块增量值，以像素为单位

参见:

• JScrollBar.getBlockIncrement()

getBlockIncrement

             public int getBlockIncrement(int direction)
            

如果视口的视图是Scrollable对象，则计算滚动的块增量。否则blockIncrement等于视口的宽度或高度。如果没有视口，则返回super.getBlockIncrement。

覆盖:

getBlockIncrement 在类 JScrollBar中

参数:

direction - 小于零表示向上/左滚动，大于零表示向下/右滚动

返回:

一个整数，以像素为单位，包含块增量

参见:

• Scrollable.getScrollableBlockIncrement(java.awt.Rectangle, int, int)