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:
- Accessible, Adjustable, ImageObserver, MenuContainer, Serializable, 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. A future release of Swing will provide support for
long term persistence.
- See Also:
Scrollable
,
JScrollPane.createVerticalScrollBar()
,
JScrollPane.createHorizontalScrollBar()
, Serialized Form
Constructor Summary |
JScrollPane.ScrollBar(int orientation)
Creates a scrollbar with the specified orientation,
where the options are:
JScrollPane.VERTICAL
JScrollPane.HORIZONTAL
|
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, getBlockIncrement, getMaximum, getMaximumSize, getMinimum, getMinimumSize, getModel, getOrientation, getUI, getUIClassID, getUnitIncrement, getValue, getValueIsAdjusting, getVisibleAmount, isFocusTraversable, paramString, removeAdjustmentListener, setEnabled, setMaximum, setMinimum, setModel, setOrientation, setValue, setValueIsAdjusting, setValues, setVisibleAmount, updateUI |
Methods inherited from class javax.swing.JComponent |
addAncestorListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getDebugGraphicsOptions, getGraphics, getHeight, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getNextFocusableComponent, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getVerifyInputWhenFocusTarget, getVisibleRect, getWidth, getX, getY, grabFocus, hasFocus, hide, isDoubleBuffered, isFocusCycleRoot, isLightweightComponent, isManagingFocus, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isOptimizedDrawingEnabled, isPaintingTile, isPreferredSizeSet, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processFocusEvent, processKeyBinding, processKeyEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setDebugGraphicsOptions, setDoubleBuffered, setFont, setForeground, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update |
Methods inherited from class java.awt.Container |
add, add, add, add, add, addContainerListener, addImpl, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getLayout, insets, invalidate, isAncestorOf, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setLayout, validate, validateTree |
Methods inherited from class java.awt.Component |
action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getInputContext, getInputMethodRequests, getLocale, getLocation, getLocationOnScreen, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, imageUpdate, inside, isDisplayable, isEnabled, isLightweight, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus |
JScrollPane.ScrollBar
public JScrollPane.ScrollBar(int orientation)
- Creates a scrollbar with the specified orientation,
where the options are:
- JScrollPane.VERTICAL
- JScrollPane.HORIZONTAL
- Parameters:
orientation
- an integer specifying one of the legal
orientation values shown above
setUnitIncrement
public void setUnitIncrement(int unitIncrement)
- Messages super to set the value, and resets the
unitIncrementSet
instance variable to true.
- Overrides:
setUnitIncrement
in class JScrollBar
- Parameters:
unitIncrement
- the new unit increment value, in pixels
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.
- Overrides:
setBlockIncrement
in class JScrollBar
- Parameters:
blockIncrement
- the new block increment value, in pixels
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)
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