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JDK 5 Documentation v6.0, Java 2 SDK 英文文档
JScrollPane.ScrollBar (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档
javax.swing
Class JScrollPane.ScrollBar
java.lang.Object
java.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.JScrollBar
javax.swing.JScrollPane.ScrollBar
- All Implemented Interfaces:
- Adjustable, ImageObserver, MenuContainer, Serializable, Accessible, UIResource
- Enclosing class:
- JScrollPane
protected class JScrollPane.ScrollBar
- extends JScrollBar
- implements UIResource
By default JScrollPane
creates scrollbars
that are instances
of this class. Scrollbar
overrides the
getUnitIncrement
and getBlockIncrement
methods so that, if the viewport's view is a Scrollable
,
the view is asked to compute these values. Unless
the unit/block increment have been explicitly set.
Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing. As of 1.4, support for long term storage
of all JavaBeansTM
has been added to the java.beans
package.
Please see XMLEncoder
.
- See Also:
Scrollable
,
JScrollPane.createVerticalScrollBar()
,
JScrollPane.createHorizontalScrollBar()
Constructor Summary |
JScrollPane.ScrollBar(int orientation)
Creates a scrollbar with the specified orientation. |
Method Summary |
int |
getBlockIncrement(int direction)
Computes the block increment for scrolling if the viewport's
view is a Scrollable object. |
int |
getUnitIncrement(int direction)
Computes the unit increment for scrolling if the viewport's
view is a Scrollable object. |
void |
setBlockIncrement(int blockIncrement)
Messages super to set the value, and resets the
blockIncrementSet instance variable to true. |
void |
setUnitIncrement(int unitIncrement)
Messages super to set the value, and resets the
unitIncrementSet instance variable to true. |
Methods inherited from 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 inherited from class javax.swing.JComponent |
addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, 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, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, 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 inherited from 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, transferFocusBackward, transferFocusDownCycle, validate, validateTree |
Methods inherited from 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, 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, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, 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, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle |
JScrollPane.ScrollBar
public JScrollPane.ScrollBar(int orientation)
- Creates a scrollbar with the specified orientation.
The options are:
ScrollPaneConstants.VERTICAL
ScrollPaneConstants.HORIZONTAL
- Parameters:
orientation
- an integer specifying one of the legal
orientation values shown above- Since:
- 1.4
setUnitIncrement
public void setUnitIncrement(int unitIncrement)
- Messages super to set the value, and resets the
unitIncrementSet
instance variable to true.
- Specified by:
setUnitIncrement
in interface Adjustable
- Overrides:
setUnitIncrement
in class JScrollBar
- Parameters:
unitIncrement
- the new unit increment value, in pixels- See Also:
JScrollBar.getUnitIncrement(int)
getUnitIncrement
public int getUnitIncrement(int direction)
- Computes the unit increment for scrolling if the viewport's
view is a
Scrollable
object.
Otherwise return super.getUnitIncrement
.
- Overrides:
getUnitIncrement
in class JScrollBar
- Parameters:
direction
- less than zero to scroll up/left,
greater than zero for down/right
- Returns:
- an integer, in pixels, containing the unit increment
- See Also:
Scrollable.getScrollableUnitIncrement(java.awt.Rectangle, int, int)
setBlockIncrement
public void setBlockIncrement(int blockIncrement)
- Messages super to set the value, and resets the
blockIncrementSet
instance variable to true.
- Specified by:
setBlockIncrement
in interface Adjustable
- Overrides:
setBlockIncrement
in class JScrollBar
- Parameters:
blockIncrement
- the new block increment value, in pixels- See Also:
JScrollBar.getBlockIncrement()
getBlockIncrement
public int getBlockIncrement(int direction)
- Computes the block increment for scrolling if the viewport's
view is a
Scrollable
object. Otherwise
the blockIncrement
equals the viewport's width
or height. If there's no viewport return
super.getBlockIncrement
.
- Overrides:
getBlockIncrement
in class JScrollBar
- Parameters:
direction
- less than zero to scroll up/left,
greater than zero for down/right
- Returns:
- an integer, in pixels, containing the block increment
- See Also:
Scrollable.getScrollableBlockIncrement(java.awt.Rectangle, int, int)
Submit a bug or feature
For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples. Copyright 2006 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.