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

实现ScrollBarUI的金属外观和感觉

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() 返回拇指的最小可接受尺寸。
Dimension	getPreferredSize(JComponent c) 垂直滚动条的首选宽度是（非 null ）增量/减量按钮的最大宽度和拇指的最小宽度的最大值。
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) 这被覆盖只是为了增加无效区域。

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

字段详细信息

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

构造方法详细信息

MetalScrollBarUI

public MetalScrollBarUI()

方法详细信息

createUI

public static ComponentUI createUI(JComponent c)

installDefaults

protected void installDefaults()

重写：

installDefaults在 BasicScrollBarUI

installListeners

protected void installListeners()

重写：

installListeners在 BasicScrollBarUI

createPropertyChangeListener

protected PropertyChangeListener createPropertyChangeListener()

重写：

createPropertyChangeListener在 BasicScrollBarUI

configureScrollBarColors

protected void configureScrollBarColors()

重写：

configureScrollBarColors在 BasicScrollBarUI

getPreferredSize

public Dimension getPreferredSize(JComponent c)

描述从类别复制： BasicScrollBarUI

垂直滚动条的首选宽度是（非null ）增量/减量按钮的最大宽度和拇指的最小宽度的最大值。 优选的高度是相同部件的优选高度的总和。 水平滚动条的首选尺寸的基础是相似的。

preferredSize只计算一次，对此方法的后续调用只返回缓存的大小。

重写：

getPreferredSize在 BasicScrollBarUI

参数

c -在 JScrollBar多数民众赞成委托这种方法给我们

结果

基本JScrollBar的首选大小

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在 BasicScrollBarUI类

createIncreaseButton

protected JButton createIncreaseButton(int orientation)

返回表示增加视图的视图。

重写：

createIncreaseButton在 BasicScrollBarUI

paintTrack

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

重写：

paintTrack在 BasicScrollBarUI

paintThumb

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

重写：

paintThumb在 BasicScrollBarUI类

getMinimumThumbSize

protected Dimension getMinimumThumbSize()

描述从类别复制： BasicScrollBarUI

返回拇指的最小可接受尺寸。 如果滚动条变得如此之小，以至于此大小不可用，拇指将被隐藏。

警告 ：此方法返回的值不应该被修改，它是一个共享静态常量。

重写：

getMinimumThumbSize在 BasicScrollBarUI

结果

拇指的最小可接受尺寸。

另请参见：

BasicScrollBarUI.getMaximumThumbSize()

setThumbBounds

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

这被覆盖只是为了增加无效区域。 这确保拇指下方的“阴影”无效

重写：

setThumbBounds在 BasicScrollBarUI

另请参见：

BasicScrollBarUI.getThumbBounds()