Class SynthScrollBarUI

java.lang.Object

javax.swing.plaf.ComponentUI

javax.swing.plaf.ScrollBarUI

javax.swing.plaf.basic.BasicScrollBarUI

javax.swing.plaf.synth.SynthScrollBarUI

All Implemented Interfaces:

LayoutManager, PropertyChangeListener, EventListener, SynthConstants, SynthUI, SwingConstants

public class SynthScrollBarUI
extends BasicScrollBarUI
implements PropertyChangeListener, SynthUI

Provides the Synth L&F UI delegate for JScrollBar.

Since:

1.7

Nested Class Summary

Nested classes/interfaces inherited from class BasicScrollBarUI

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

Field Summary

Fields inherited from class BasicScrollBarUI

buttonListener, decrButton, DECREASE_HIGHLIGHT, decrGap, incrButton, INCREASE_HIGHLIGHT, incrGap, isDragging, maximumThumbSize, minimumThumbSize, modelListener, NO_HIGHLIGHT, propertyChangeListener, scrollbar, scrollBarWidth, scrollListener, scrollTimer, thumbColor, thumbDarkShadowColor, thumbHighlightColor, thumbLightShadowColor, thumbRect, trackColor, trackHighlight, trackHighlightColor, trackListener, trackRect

Fields inherited from interface SwingConstants

BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST

Fields inherited from interface SynthConstants

DEFAULT, DISABLED, ENABLED, FOCUSED, MOUSE_OVER, PRESSED, SELECTED

Constructor Summary

Constructors

Constructor	Description
SynthScrollBarUI()	Constructs a SynthScrollBarUI.

Method Summary

Modifier and Type	Method	Description
protected void	configureScrollBarColors()	Configures the scroll bar colors.
protected JButton	createDecreaseButton(int orientation)	Creates a decrease button.
protected JButton	createIncreaseButton(int orientation)	Creates an increase button.
static ComponentUI	createUI(JComponent c)	Returns a UI.
SynthContext	getContext(JComponent c)	Returns the Context for the specified component.
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.
boolean	getSupportsAbsolutePositioning()	Indicates whether the user can absolutely position the thumb with a mouse gesture (usually the middle mouse button).
protected void	installDefaults()	Installs the defaults.
protected void	installListeners()	Installs the listeners.
void	paint(Graphics g, JComponent c)	Paints the specified component according to the Look and Feel.
protected void	paint(SynthContext context, Graphics g)	Paints the specified component.
void	paintBorder(SynthContext context, Graphics g, int x, int y, int w, int h)	Paints the border.
protected void	paintThumb(SynthContext context, Graphics g, Rectangle thumbBounds)	Paints the scrollbar thumb.
protected void	paintTrack(SynthContext context, Graphics g, Rectangle trackBounds)	Paints the scrollbar track.
void	propertyChange(PropertyChangeEvent e)	This method gets called when a bound property is changed.
protected void	setThumbRollover(boolean active)	Sets whether or not the mouse is currently over the thumb.
protected void	uninstallDefaults()	Uninstalls the defaults.
protected void	uninstallListeners()	Uninstall the listeners.
void	update(Graphics g, JComponent c)	Notifies this UI delegate to repaint the specified component.

Methods inherited from class BasicScrollBarUI

addLayoutComponent, createArrowButtonListener, createModelListener, createPropertyChangeListener, createScrollListener, createTrackListener, getMaximumSize, getMaximumThumbSize, getThumbBounds, getTrackBounds, installComponents, installKeyboardActions, installUI, isThumbRollover, layoutContainer, layoutHScrollbar, layoutVScrollbar, minimumLayoutSize, paintDecreaseHighlight, paintIncreaseHighlight, paintThumb, paintTrack, preferredLayoutSize, removeLayoutComponent, scrollByBlock, scrollByUnit, setThumbBounds, uninstallComponents, uninstallKeyboardActions, uninstallUI

Methods inherited from class ComponentUI

contains, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, getMinimumSize

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SynthScrollBarUI

public SynthScrollBarUI()

Constructs a SynthScrollBarUI.

Method Details

createUI

public static ComponentUI createUI(JComponent c)

Returns a UI.

Parameters:

c - a component

Returns:

a UI

installDefaults

protected void installDefaults()

Installs the defaults.

Overrides:

installDefaults in class BasicScrollBarUI

configureScrollBarColors

protected void configureScrollBarColors()

Configures the scroll bar colors.

Overrides:

configureScrollBarColors in class BasicScrollBarUI

installListeners

protected void installListeners()

Installs the listeners.

Overrides:

installListeners in class BasicScrollBarUI

uninstallListeners

protected void uninstallListeners()

Uninstall the listeners.

Overrides:

uninstallListeners in class BasicScrollBarUI

uninstallDefaults

protected void uninstallDefaults()

Uninstalls the defaults.

Overrides:

uninstallDefaults in class BasicScrollBarUI

getContext

public SynthContext getContext(JComponent c)

Returns the Context for the specified component.

Specified by:

getContext in interface SynthUI

Parameters:

c - Component requesting SynthContext.

Returns:

SynthContext describing component.

getSupportsAbsolutePositioning

public boolean getSupportsAbsolutePositioning()

Indicates whether the user can absolutely position the thumb with a mouse gesture (usually the middle mouse button).

Overrides:

getSupportsAbsolutePositioning in class BasicScrollBarUI

Returns:

true if a mouse gesture can absolutely position the thumb

update

public void update(Graphics g,
 JComponent c)

Notifies this UI delegate to repaint the specified component. This method paints the component background, then calls the paint(SynthContext,Graphics) method.

In general, this method does not need to be overridden by subclasses. All Look and Feel rendering code should reside in the paint method.

Overrides:

update in class ComponentUI

Parameters:

g - the Graphics object used for painting

c - the component being painted

See Also:

• paint(SynthContext,Graphics)

paint

public void paint(Graphics g,
 JComponent c)

Paints the specified component according to the Look and Feel.

This method is not used by Synth Look and Feel. Painting is handled by the paint(SynthContext,Graphics) method.

Overrides:

paint in class BasicScrollBarUI

Parameters:

g - the Graphics object used for painting

c - the component being painted

See Also:

• paint(SynthContext,Graphics)

paint

protected void paint(SynthContext context,
 Graphics g)

Paints the specified component.

Parameters:

context - context for the component being painted

g - the Graphics object used for painting

See Also:

• update(Graphics,JComponent)

paintBorder

public void paintBorder(SynthContext context,
 Graphics g,
 int x,
 int y,
 int w,
 int h)

Paints the border.

Specified by:

paintBorder in interface SynthUI

Parameters:

context - a component context

g - Graphics to paint on

x - the X coordinate

y - the Y coordinate

w - width of the border

h - height of the border

paintTrack

protected void paintTrack(SynthContext context,
 Graphics g,
 Rectangle trackBounds)

Paints the scrollbar track.

Parameters:

context - context for the component being painted

g - Graphics object used for painting

trackBounds - bounding box for the track

paintThumb

protected void paintThumb(SynthContext context,
 Graphics g,
 Rectangle thumbBounds)

Paints the scrollbar thumb.

Parameters:

context - context for the component being painted

g - Graphics object used for painting

thumbBounds - bounding box for the thumb

getPreferredSize

public 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. 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(JComponent)
• ComponentUI.getMinimumSize(JComponent)

getMinimumThumbSize

protected Dimension getMinimumThumbSize()

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()

createDecreaseButton

protected JButton createDecreaseButton(int orientation)

Creates a decrease button.

Overrides:

createDecreaseButton in class BasicScrollBarUI

Parameters:

orientation - the orientation

Returns:

a decrease button

createIncreaseButton

protected JButton createIncreaseButton(int orientation)

Creates an increase button.

Overrides:

createIncreaseButton in class BasicScrollBarUI

Parameters:

orientation - the orientation

Returns:

an increase button

setThumbRollover

protected void setThumbRollover(boolean active)

Sets whether or not the mouse is currently over the thumb.

Overrides:

setThumbRollover in class BasicScrollBarUI

Parameters:

active - True indicates the thumb is currently active.

propertyChange

public void propertyChange(PropertyChangeEvent e)

Description copied from interface: PropertyChangeListener

This method gets called when a bound property is changed.

Specified by:

propertyChange in interface PropertyChangeListener

Parameters:

e - A PropertyChangeEvent object describing the event source and the property that has changed.