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
```
Implementation of ScrollBarUI for the Metal Look and Feel

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`

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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

Constructor Summary

Constructors
Constructor and Description

MetalScrollBarUI()

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Method Summary

Methods
Modifier and Type	Method and Description
`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()` Returns the smallest acceptable size for the thumb.
`Dimension`	`getPreferredSize(JComponent c)` A vertical scrollbar's 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.

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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
```
    See Also:
    Constant Field Values
  - isFreeStanding
```
protected boolean isFreeStanding
```
- Constructor Detail
  - MetalScrollBarUI
```
public MetalScrollBarUI()
```
- Method Detail
  - createUI
```
public static ComponentUI createUI(JComponent c)
```
  - installDefaults
```
protected void installDefaults()
```
    Overrides:
    
    installDefaults in class BasicScrollBarUI
  - installListeners
```
protected void installListeners()
```
    Overrides:
    
    installListeners in class BasicScrollBarUI
  - createPropertyChangeListener
```
protected PropertyChangeListener createPropertyChangeListener()
```
    Overrides:
    
    createPropertyChangeListener in class BasicScrollBarUI
  - configureScrollBarColors
```
protected void configureScrollBarColors()
```
    Overrides:
    
    configureScrollBarColors in class BasicScrollBarUI
  - getPreferredSize
```
public Dimension getPreferredSize(JComponent c)
```
    Description copied from class: BasicScrollBarUI
    
    A vertical scrollbar's 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, subsequent calls to this method just return a cached size.
    
    Overrides:
    
    getPreferredSize in 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), ComponentUI.getMinimumSize(javax.swing.JComponent)
  - createDecreaseButton
```
protected JButton createDecreaseButton(int orientation)
```
    Returns the view that represents the decrease view.
    
    Overrides:
    
    createDecreaseButton in class BasicScrollBarUI
  - createIncreaseButton
```
protected JButton createIncreaseButton(int orientation)
```
    Returns the view that represents the increase view.
    
    Overrides:
    
    createIncreaseButton in class BasicScrollBarUI
  - paintTrack
```
protected void paintTrack(Graphics g,
              JComponent c,
              Rectangle trackBounds)
```
    Overrides:
    
    paintTrack in class BasicScrollBarUI
  - paintThumb
```
protected void paintThumb(Graphics g,
              JComponent c,
              Rectangle thumbBounds)
```
    Overrides:
    
    paintThumb in class BasicScrollBarUI
  - getMinimumThumbSize
```
protected Dimension getMinimumThumbSize()
```
    Description copied from class: BasicScrollBarUI
    
    Returns 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
    
    Returns:
    The smallest acceptable size for the thumb.
    See Also:
    BasicScrollBarUI.getMaximumThumbSize()
  - 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
    
    See Also:
    BasicScrollBarUI.getThumbBounds()

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Bij voorbaat dank.

Document heeft de 11/06/2005 gemaakt, de laatste keer de 04/03/2020 gewijzigd
Bron van het afgedrukte document:https://www.gaudry.be/nl/java-api-rf-javax/swing/plaf/metal/MetalScrollBarUI.html

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Referenties

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Inhoudsopgave Haut

Class MetalScrollBarUI

Nested Class Summary

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

Field Summary

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

Fields inherited from interface javax.swing.SwingConstants

Constructor Summary

Method Summary

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

Methods inherited from class javax.swing.plaf.ComponentUI

Methods inherited from class java.lang.Object

Field Detail

bumps

increaseButton

decreaseButton

scrollBarWidth

FREE_STANDING_PROP

isFreeStanding

Constructor Detail

MetalScrollBarUI

Method Detail

createUI

installDefaults

installListeners

createPropertyChangeListener

configureScrollBarColors

getPreferredSize

createDecreaseButton

createIncreaseButton

paintTrack

paintThumb

getMinimumThumbSize

setThumbBounds

Referenties