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Java™ Platform Standard Ed. 6 |
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java.lang.Objectjava.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.JScrollBar
javax.swing.JScrollPane.ScrollBar
protected class JScrollPane.ScrollBar
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.
Scrollable,
JScrollPane.createVerticalScrollBar(),
JScrollPane.createHorizontalScrollBar()| Nested Class Summary |
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| Nested classes/interfaces inherited from class javax.swing.JScrollBar |
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JScrollBar.AccessibleJScrollBar |
| Nested classes/interfaces inherited from class javax.swing.JComponent |
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JComponent.AccessibleJComponent |
| Nested classes/interfaces inherited from class java.awt.Container |
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Container.AccessibleAWTContainer |
| Nested classes/interfaces inherited from class java.awt.Component |
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Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy |
| Field Summary |
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| Fields inherited from class javax.swing.JScrollBar |
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blockIncrement, model, orientation, unitIncrement |
| Fields inherited from class javax.swing.JComponent |
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accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW |
| Fields inherited from class java.awt.Component |
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BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT |
| Fields inherited from interface java.awt.Adjustable |
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HORIZONTAL, NO_ORIENTATION, VERTICAL |
| Fields inherited from interface java.awt.image.ImageObserver |
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ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH |
| Constructor Summary | |
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JScrollPane.ScrollBar(int orientation)
Creates a scrollbar with the specified orientation. |
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| Method Summary | |
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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 java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
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public JScrollPane.ScrollBar(int orientation)
ScrollPaneConstants.VERTICAL
ScrollPaneConstants.HORIZONTAL
orientation - an integer specifying one of the legal
orientation values shown above| Method Detail |
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public void setUnitIncrement(int unitIncrement)
unitIncrementSet instance variable to true.
setUnitIncrement in interface AdjustablesetUnitIncrement in class JScrollBarunitIncrement - the new unit increment value, in pixelsJScrollBar.getUnitIncrement(int)public int getUnitIncrement(int direction)
Scrollable object.
Otherwise return super.getUnitIncrement.
getUnitIncrement in class JScrollBardirection - less than zero to scroll up/left,
greater than zero for down/right
Scrollable.getScrollableUnitIncrement(java.awt.Rectangle, int, int)public void setBlockIncrement(int blockIncrement)
blockIncrementSet instance variable to true.
setBlockIncrement in interface AdjustablesetBlockIncrement in class JScrollBarblockIncrement - the new block increment value, in pixelsJScrollBar.getBlockIncrement()public int getBlockIncrement(int direction)
Scrollable object. Otherwise
the blockIncrement equals the viewport's width
or height. If there's no viewport return
super.getBlockIncrement.
getBlockIncrement in class JScrollBardirection - less than zero to scroll up/left,
greater than zero for down/right
Scrollable.getScrollableBlockIncrement(java.awt.Rectangle, int, int)
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Java™ Platform Standard Ed. 6 |
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