Table of Contents
首页 API Docs 工具
首页
API Docs
工具
openjdk / 11.0.11 / java.desktop / javax / swing / plaf / synth / synthscrollbarui.html /

Class 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 Classes

Nested classes/interfaces declared in class javax.swing.plaf.basic.BasicScrollBarUI

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

Fields

Fields declared in class javax.swing.plaf.basic.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 declared in 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

Fields declared in interface javax.swing.plaf.synth.SynthConstants

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

Constructors

Constructor Description
SynthScrollBarUI()

Methods

Modifier and Type Method Description
static ComponentUI createUI​(JComponent c)

Returns a UI.
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.
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.
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 update​(Graphics g, JComponent c)

Notifies this UI delegate to repaint the specified component.

Methods declared in class javax.swing.plaf.basic.BasicScrollBarUI

configureScrollBarColors, createArrowButtonListener, createDecreaseButton, createIncreaseButton, createModelListener, createPropertyChangeListener, createScrollListener, createTrackListener, getMaximumSize, getMaximumThumbSize, getMinimumThumbSize, getSupportsAbsolutePositioning, getThumbBounds, getTrackBounds, installComponents, installDefaults, installKeyboardActions, installListeners, installUI, isThumbRollover, layoutHScrollbar, layoutVScrollbar, paintDecreaseHighlight, paintIncreaseHighlight, paintThumb, paintTrack, scrollByBlock, scrollByUnit, setThumbBounds, setThumbRollover, uninstallComponents, uninstallDefaults, uninstallKeyboardActions, uninstallListeners, uninstallUI

Methods declared in class javax.swing.plaf.ComponentUI

contains, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, getMinimumSize

Methods declared in class java.lang.Object

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

Methods declared in interface java.awt.LayoutManager

addLayoutComponent, layoutContainer, minimumLayoutSize, preferredLayoutSize, removeLayoutComponent

Methods declared in interface java.beans.PropertyChangeListener

propertyChange

Methods declared in interface javax.swing.plaf.synth.SynthUI

getContext, paintBorder

Constructors

SynthScrollBarUI

public SynthScrollBarUI()

Methods

createUI

public static ComponentUI createUI(JComponent c)

Returns a UI.

Parameters:
c - a component
Returns:
a UI

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 ComponentUI
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)

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(javax.swing.JComponent), ComponentUI.getMinimumSize(javax.swing.JComponent)

© 1993, 2020, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/plaf/synth/SynthScrollBarUI.html

Name OpenJDK
Version
Badge
Last Updated 2021-06-14T07:08:27Z

Copy badge