- java.lang.Object
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- java.awt.Component
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- java.awt.Container
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- javax.swing.JComponent
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- javax.swing.JScrollBar
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- javax.swing.JScrollPane.ScrollBar
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- All Implemented Interfaces:
- Adjustable, ImageObserver, MenuContainer, Serializable, Accessible, UIResource
- Enclosing class:
- JScrollPane
protected class JScrollPane.ScrollBar extends JScrollBar implements UIResource
By defaultJScrollPane
creates scrollbars that are instances of this class.Scrollbar
overrides thegetUnitIncrement
andgetBlockIncrement
methods so that, if the viewport's view is aScrollable
, 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 seeXMLEncoder
.
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Nested Class Summary
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Nested classes/interfaces inherited from class javax.swing.JScrollBar
JScrollBar.AccessibleJScrollBar
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Nested classes/interfaces inherited from class javax.swing.JComponent
JComponent.AccessibleJComponent
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Nested classes/interfaces inherited from class java.awt.Container
Container.AccessibleAWTContainer
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Nested classes/interfaces inherited from class java.awt.Component
Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy
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Field Summary
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Fields inherited from class javax.swing.JScrollBar
blockIncrement, model, orientation, unitIncrement
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Fields inherited from class javax.swing.JComponent
accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW
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Fields inherited from class java.awt.Component
BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
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Fields inherited from interface java.awt.Adjustable
HORIZONTAL, NO_ORIENTATION, VERTICAL
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Constructor Summary
Constructors Constructor and Description JScrollPane.ScrollBar(int orientation)
Creates a scrollbar with the specified orientation.
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Method Summary
Methods Modifier and Type Method and Description int
getBlockIncrement(int direction)
Computes the block increment for scrolling if the viewport's view is aScrollable
object.int
getUnitIncrement(int direction)
Computes the unit increment for scrolling if the viewport's view is aScrollable
object.void
setBlockIncrement(int blockIncrement)
Messages super to set the value, and resets theblockIncrementSet
instance variable to true.void
setUnitIncrement(int unitIncrement)
Messages super to set the value, and resets theunitIncrementSet
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
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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, 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
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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, transferFocusDownCycle, validate, validateTree
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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, 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, transferFocusBackward, transferFocusUpCycle
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Constructor Detail
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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
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Method Detail
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setUnitIncrement
public void setUnitIncrement(int unitIncrement)
Messages super to set the value, and resets theunitIncrementSet
instance variable to true.- Specified by:
setUnitIncrement
in interfaceAdjustable
- Overrides:
setUnitIncrement
in classJScrollBar
- Parameters:
unitIncrement
- the new unit increment value, in pixels- See Also:
JScrollBar.getUnitIncrement(int)
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getUnitIncrement
public int getUnitIncrement(int direction)
Computes the unit increment for scrolling if the viewport's view is aScrollable
object. Otherwise returnsuper.getUnitIncrement
.- Overrides:
getUnitIncrement
in classJScrollBar
- 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)
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setBlockIncrement
public void setBlockIncrement(int blockIncrement)
Messages super to set the value, and resets theblockIncrementSet
instance variable to true.- Specified by:
setBlockIncrement
in interfaceAdjustable
- Overrides:
setBlockIncrement
in classJScrollBar
- Parameters:
blockIncrement
- the new block increment value, in pixels- See Also:
JScrollBar.getBlockIncrement()
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getBlockIncrement
public int getBlockIncrement(int direction)
Computes the block increment for scrolling if the viewport's view is aScrollable
object. Otherwise theblockIncrement
equals the viewport's width or height. If there's no viewport returnsuper.getBlockIncrement
.- Overrides:
getBlockIncrement
in classJScrollBar
- 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)
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