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

Author:

Tom Santos, Steve Wilson

Nested Class Summary

(package private) class

MetalScrollBarUI.ScrollBarListener

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

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

Field Summary

protected MetalBumps	bumps
private static Color	darkShadowColor
protected MetalScrollButton	decreaseButton
static String	FREE_STANDING_PROP
private static Color	highlightColor
protected MetalScrollButton	increaseButton
protected boolean	isFreeStanding
protected int	scrollBarWidth
private static Color	shadowColor
private static Color	thumbColor
private static Color	thumbHighlightColor
private static Color	thumbShadow

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 java.beans.PropertyChangeListener	createPropertyChangeListener()
static ComponentUI	createUI(JComponent c) Returns an instance of the UI delegate for the specified component.
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, 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

shadowColor

private static Color shadowColor

highlightColor

private static Color highlightColor

darkShadowColor

private static Color darkShadowColor

thumbColor

private static Color thumbColor

thumbShadow

private static Color thumbShadow

thumbHighlightColor

private static Color thumbHighlightColor

bumps

protected 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)

Description copied from class: ComponentUI

Returns an instance of the UI delegate for the specified component. Each subclass must provide its own static createUI method that returns an instance of that UI delegate subclass. If the UI delegate subclass is stateless, it may return an instance that is shared by multiple components. If the UI delegate is stateful, then it should return a new instance per component. The default implementation of this method throws an error, as it should never be invoked.

installDefaults

protected void installDefaults()

Overrides:

installDefaults in class BasicScrollBarUI

installListeners

protected void installListeners()

Overrides:

installListeners in class BasicScrollBarUI

createPropertyChangeListener

protected java.beans.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), 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

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()