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Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class MetalScrollBarUI - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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javax.swing.plaf.metal
Class MetalScrollBarUI

java.lang.Object
  |
  +--javax.swing.plaf.ComponentUI
        |
        +--javax.swing.plaf.ScrollBarUI
              |
              +--javax.swing.plaf.basic.BasicScrollBarUI
                    |
                    +--javax.swing.plaf.metal.MetalScrollBarUI

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public class MetalScrollBarUI

extends BasicScrollBarUI

Implementation of ScrollBarUI for the Metal Look and Feel

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Inner classes inherited from class javax.swing.plaf.basic.BasicScrollBarUI

BasicScrollBarUI.ArrowButtonListener, BasicScrollBarUI.ModelListener, BasicScrollBarUI.PropertyChangeHandler, BasicScrollBarUI.ScrollListener, BasicScrollBarUI.TrackListener

 

Field Summary
protected  javax.swing.plaf.metal.MetalBumps	bumps
protected  MetalScrollButton	decreaseButton
static String	FREE_STANDING_PROP
protected  MetalScrollButton	increaseButton
protected  boolean	isFreeStanding
protected  int	scrollBarWidth

 

Fields inherited from class javax.swing.plaf.basic.BasicScrollBarUI

buttonListener, decrButton, DECREASE_HIGHLIGHT, incrButton, INCREASE_HIGHLIGHT, isDragging, maximumThumbSize, minimumThumbSize, modelListener, NO_HIGHLIGHT, propertyChangeListener, scrollbar, scrollListener, scrollTimer, thumbColor, thumbDarkShadowColor, thumbHighlightColor, thumbLightShadowColor, thumbRect, trackColor, trackHighlight, trackHighlightColor, trackListener, trackRect

 

Constructor Summary

MetalScrollBarUI()

 

Method Summary
protected  void	configureScrollBarColors()
protected  JButton	createDecreaseButton(int orientation)           Returns the view that represents the decrease view.
protected  JButton	createIncreaseButton(int orientation)           Returns the view that represents the increase view.
protected  PropertyChangeListener	createPropertyChangeListener()
static ComponentUI	createUI(JComponent c)
protected  Dimension	getMinimumThumbSize()           Return the smallest acceptable size for the thumb.
Dimension	getPreferredSize(JComponent c)           A vertical scrollbars preferred width is the maximum of preferred widths of the (non null) increment/decrement buttons, and the minimum width of the thumb.
protected  void	installDefaults()
protected  void	installListeners()
protected  void	paintThumb(Graphics g, JComponent c, Rectangle thumbBounds)
protected  void	paintTrack(Graphics g, JComponent c, Rectangle trackBounds)
protected  void	setThumbBounds(int x, int y, int width, int height)           This is overridden only to increase the invalid area.

 

Methods inherited from class javax.swing.plaf.basic.BasicScrollBarUI

addLayoutComponent, createArrowButtonListener, createModelListener, createScrollListener, createTrackListener, getMaximumSize, getMaximumThumbSize, getMinimumSize, getThumbBounds, getTrackBounds, installComponents, installKeyboardActions, installUI, layoutContainer, layoutHScrollbar, layoutVScrollbar, minimumLayoutSize, paint, paintDecreaseHighlight, paintIncreaseHighlight, preferredLayoutSize, removeLayoutComponent, scrollByBlock, scrollByUnit, uninstallComponents, uninstallDefaults, uninstallKeyboardActions, uninstallListeners, uninstallUI

 

Methods inherited from class javax.swing.plaf.ComponentUI

contains, getAccessibleChild, getAccessibleChildrenCount, update

 

Methods inherited from class java.lang.Object

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

 

Field Detail

bumps

protected javax.swing.plaf.metal.MetalBumps bumps

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increaseButton

protected MetalScrollButton increaseButton

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decreaseButton

protected MetalScrollButton decreaseButton

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scrollBarWidth

protected int scrollBarWidth

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FREE_STANDING_PROP

public static final String FREE_STANDING_PROP

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isFreeStanding

protected boolean isFreeStanding

Constructor Detail

MetalScrollBarUI

public MetalScrollBarUI()

Method Detail

createUI

public static ComponentUI createUI(JComponent c)

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installDefaults

protected void installDefaults()

Overrides:

installDefaults in class BasicScrollBarUI

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installListeners

protected void installListeners()

Overrides:

installListeners in class BasicScrollBarUI

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createPropertyChangeListener

protected PropertyChangeListener createPropertyChangeListener()

Overrides:

createPropertyChangeListener in class BasicScrollBarUI

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configureScrollBarColors

protected void configureScrollBarColors()

Overrides:

configureScrollBarColors in class BasicScrollBarUI

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getPreferredSize

public Dimension getPreferredSize(JComponent c)

Description copied from class: BasicScrollBarUI

A vertical scrollbars preferred width is the maximum of preferred widths of the (non null) increment/decrement buttons, and the minimum width of the thumb. The preferred height is the sum of the preferred heights of the same parts. The basis for the preferred size of a horizontal scrollbar is similar.

The preferredSize is only computed once, subequent calls to this method just return a cached size. T

Overrides:

getPreferredSize in class BasicScrollBarUI

Tags copied from class: BasicScrollBarUI

Parameters:

c - The JScrollBar that's delegating this method to us.

Returns:

The preferred size of a Basic JScrollBar.

See Also:

BasicScrollBarUI.getMaximumSize(javax.swing.JComponent), BasicScrollBarUI.getMinimumSize(javax.swing.JComponent)

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createDecreaseButton

protected JButton createDecreaseButton(int orientation)

Returns the view that represents the decrease view.

Overrides:

createDecreaseButton in class BasicScrollBarUI

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createIncreaseButton

protected JButton createIncreaseButton(int orientation)

Returns the view that represents the increase view.

Overrides:

createIncreaseButton in class BasicScrollBarUI

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paintTrack

protected void paintTrack(Graphics g,
                          JComponent c,
                          Rectangle trackBounds)

Overrides:

paintTrack in class BasicScrollBarUI

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paintThumb

protected void paintThumb(Graphics g,
                          JComponent c,
                          Rectangle thumbBounds)

Overrides:

paintThumb in class BasicScrollBarUI

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getMinimumThumbSize

protected Dimension getMinimumThumbSize()

Description copied from class: BasicScrollBarUI

Return the smallest acceptable size for the thumb. If the scrollbar becomes so small that this size isn't available, the thumb will be hidden.

Warning : the value returned by this method should not be be modified, it's a shared static constant.

Overrides:

getMinimumThumbSize in class BasicScrollBarUI

Tags copied from class: BasicScrollBarUI

Returns:

The smallest acceptable size for the thumb.

See Also:

BasicScrollBarUI.getMaximumThumbSize()

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setThumbBounds

protected void setThumbBounds(int x,
                              int y,
                              int width,
                              int height)

This is overridden only to increase the invalid area. This ensures that the "Shadow" below the thumb is invalidated

Overrides:

setThumbBounds in class BasicScrollBarUI

Tags copied from class: BasicScrollBarUI

See Also:

BasicScrollBarUI.getThumbBounds()

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