Java™ Platform
Standard Ed. 6

javax.swing.plaf.metal
Class MetalScrollBarUI

java.lang.Object
  extended by javax.swing.plaf.ComponentUI
      extended by javax.swing.plaf.ScrollBarUI
          extended by javax.swing.plaf.basic.BasicScrollBarUI
              extended by 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
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, 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
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 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.
 
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
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
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
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()

Java™ Platform
Standard Ed. 6

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