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

All Implemented Interfaces:

LayoutManager， SwingConstants

public class MetalScrollBarUI
extends BasicScrollBarUI

对于金属scrollbarui实现的外观和感觉

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.plaf.basic.BasicScrollBarUI

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

Field Summary

Fields

Modifier and Type	Field and Description
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, decrGap, incrButton, INCREASE_HIGHLIGHT, incrGap, isDragging, maximumThumbSize, minimumThumbSize, modelListener, NO_HIGHLIGHT, propertyChangeListener, scrollbar, scrollListener, scrollTimer, thumbDarkShadowColor, thumbLightShadowColor, thumbRect, trackColor, trackHighlight, trackHighlightColor, trackListener, trackRect

Fields inherited from interface javax.swing.SwingConstants

BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST

构造方法摘要

构造方法

Constructor and Description
MetalScrollBarUI()

方法摘要

Modifier and Type	Method and Description
protected void	configureScrollBarColors()
protected JButton	createDecreaseButton(int orientation) 返回表示减少视图的视图。
protected JButton	createIncreaseButton(int orientation) 返回表示增加视图的视图。
protected PropertyChangeListener	createPropertyChangeListener()
static ComponentUI	createUI(JComponent c)
protected Dimension	getMinimumThumbSize() 返回最小可接受大小的拇指。
Dimension	getPreferredSize(JComponent c) 垂直滚动条的宽度是首选的首选宽度最大（非 null）增/减按钮，和拇指的最小宽度。
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) 这是重写只增加了无效区域。

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

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

Methods inherited from class javax.swing.plaf.ComponentUI

contains, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, getMinimumSize, 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

increaseButton

protected MetalScrollButton increaseButton

decreaseButton

protected MetalScrollButton decreaseButton

scrollBarWidth

protected int scrollBarWidth

FREE_STANDING_PROP

public static final String FREE_STANDING_PROP

另请参见：

Constant Field Values

isFreeStanding

protected boolean isFreeStanding

Constructor Detail

MetalScrollBarUI

public MetalScrollBarUI()

方法详细信息

createUI

public static ComponentUI createUI(JComponent c)

installDefaults

protected void installDefaults()

重写：

installDefaults 方法重写，继承类 BasicScrollBarUI

installListeners

protected void installListeners()

重写：

installListeners 方法重写，继承类 BasicScrollBarUI

createPropertyChangeListener

protected PropertyChangeListener createPropertyChangeListener()

重写：

createPropertyChangeListener 方法重写，继承类 BasicScrollBarUI

configureScrollBarColors

protected void configureScrollBarColors()

重写：

configureScrollBarColors 方法重写，继承类 BasicScrollBarUI

getPreferredSize

public Dimension getPreferredSize(JComponent c)

从阶级复制的描述： BasicScrollBarUI

垂直滚动条的宽度是首选的首选宽度最大（非 null）增/减按钮，和拇指的最小宽度。优选的高度是同一部件的优选高度的总和。对于一个水平滚动条的首选大小基本相同。

的preferredSize只计算一次，随后调用此方法只返回一个缓存的大小。

重写：

getPreferredSize 方法重写，继承类 BasicScrollBarUI

参数

c - JScrollBar，授权该方法给我们

结果

一个基本的使用首选大小

另请参见：

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

createDecreaseButton

protected JButton createDecreaseButton(int orientation)

返回表示减少视图的视图。

重写：

createDecreaseButton 方法重写，继承类 BasicScrollBarUI

createIncreaseButton

protected JButton createIncreaseButton(int orientation)

返回表示增加视图的视图。

重写：

createIncreaseButton 方法重写，继承类 BasicScrollBarUI

paintTrack

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

重写：

paintTrack 方法重写，继承类 BasicScrollBarUI

paintThumb

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

重写：

paintThumb 方法重写，继承类 BasicScrollBarUI

getMinimumThumbSize

protected Dimension getMinimumThumbSize()

从阶级复制的描述： BasicScrollBarUI

返回最小可接受大小的拇指。如果滚动条变小，这种尺寸不可用拇指将隐藏。

警告：此方法返回的值不能被修改，这是一个共享的静态常量。

重写：

getMinimumThumbSize 方法重写，继承类 BasicScrollBarUI

结果

拇指的最小可接受大小。

另请参见：

BasicScrollBarUI.getMaximumThumbSize()

setThumbBounds

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

这是重写只增加了无效区域。这确保了“影子”下面的拇指是无效的

重写：

setThumbBounds 方法重写，继承类 BasicScrollBarUI

另请参见：

BasicScrollBarUI.getThumbBounds()