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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

All Implemented Interfaces:
  LayoutManager, SwingConstants

public class MetalScrollBarUI
extends BasicScrollBarUI

Implementation of ScrollBarUI for the Metal Look and Feel

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`

Fields inherited from interface javax.swing.SwingConstants
`BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NORTH, NORTH_EAST, NORTH_WEST, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST`

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

### increaseButton

    protected MetalScrollButton increaseButton

### decreaseButton

    protected MetalScrollButton decreaseButton

### scrollBarWidth

    protected int scrollBarWidth

### FREE_STANDING_PROP

    public static final String FREE_STANDING_PROP

### 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 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`
  Following copied from class: `javax.swing.plaf.basic.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)`

### 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`
  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`
  Following copied from class: `javax.swing.plaf.basic.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`
  Following copied from class: `javax.swing.plaf.basic.BasicScrollBarUI`
  See Also:
    `BasicScrollBarUI.getThumbBounds()`

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