Java example source code file (MetalSliderUI.java)
The MetalSliderUI.java Java example source code
/*
* Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package javax.swing.plaf.metal;
import javax.swing.plaf.basic.BasicSliderUI;
import java.awt.Graphics;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Color;
import java.beans.*;
import javax.swing.*;
import javax.swing.plaf.*;
/**
* A Java L&F implementation of SliderUI.
* <p>
* <strong>Warning:
* Serialized objects of this class will not be compatible with
* future Swing releases. The current serialization support is
* appropriate for short term storage or RMI between applications running
* the same version of Swing. As of 1.4, support for long term storage
* of all JavaBeans™
* has been added to the <code>java.beans package.
* Please see {@link java.beans.XMLEncoder}.
*
* @author Tom Santos
*/
public class MetalSliderUI extends BasicSliderUI {
protected final int TICK_BUFFER = 4;
protected boolean filledSlider = false;
// NOTE: these next five variables are currently unused.
protected static Color thumbColor;
protected static Color highlightColor;
protected static Color darkShadowColor;
protected static int trackWidth;
protected static int tickLength;
private int safeLength;
/**
* A default horizontal thumb <code>Icon. This field might not be
* used. To change the <code>Icon used by this delegate directly set it
* using the <code>Slider.horizontalThumbIcon UIManager property.
*/
protected static Icon horizThumbIcon;
/**
* A default vertical thumb <code>Icon. This field might not be
* used. To change the <code>Icon used by this delegate directly set it
* using the <code>Slider.verticalThumbIcon UIManager property.
*/
protected static Icon vertThumbIcon;
private static Icon SAFE_HORIZ_THUMB_ICON;
private static Icon SAFE_VERT_THUMB_ICON;
protected final String SLIDER_FILL = "JSlider.isFilled";
public static ComponentUI createUI(JComponent c) {
return new MetalSliderUI();
}
public MetalSliderUI() {
super( null );
}
private static Icon getHorizThumbIcon() {
if (System.getSecurityManager() != null) {
return SAFE_HORIZ_THUMB_ICON;
} else {
return horizThumbIcon;
}
}
private static Icon getVertThumbIcon() {
if (System.getSecurityManager() != null) {
return SAFE_VERT_THUMB_ICON;
} else {
return vertThumbIcon;
}
}
public void installUI( JComponent c ) {
trackWidth = ((Integer)UIManager.get( "Slider.trackWidth" )).intValue();
tickLength = safeLength = ((Integer)UIManager.get( "Slider.majorTickLength" )).intValue();
horizThumbIcon = SAFE_HORIZ_THUMB_ICON =
UIManager.getIcon( "Slider.horizontalThumbIcon" );
vertThumbIcon = SAFE_VERT_THUMB_ICON =
UIManager.getIcon( "Slider.verticalThumbIcon" );
super.installUI( c );
thumbColor = UIManager.getColor("Slider.thumb");
highlightColor = UIManager.getColor("Slider.highlight");
darkShadowColor = UIManager.getColor("Slider.darkShadow");
scrollListener.setScrollByBlock( false );
prepareFilledSliderField();
}
protected PropertyChangeListener createPropertyChangeListener( JSlider slider ) {
return new MetalPropertyListener();
}
protected class MetalPropertyListener extends BasicSliderUI.PropertyChangeHandler {
public void propertyChange( PropertyChangeEvent e ) { // listen for slider fill
super.propertyChange( e );
if (e.getPropertyName().equals(SLIDER_FILL)) {
prepareFilledSliderField();
}
}
}
private void prepareFilledSliderField() {
// Use true for Ocean theme
filledSlider = MetalLookAndFeel.usingOcean();
Object sliderFillProp = slider.getClientProperty(SLIDER_FILL);
if (sliderFillProp != null) {
filledSlider = ((Boolean) sliderFillProp).booleanValue();
}
}
public void paintThumb(Graphics g) {
Rectangle knobBounds = thumbRect;
g.translate( knobBounds.x, knobBounds.y );
if ( slider.getOrientation() == JSlider.HORIZONTAL ) {
getHorizThumbIcon().paintIcon( slider, g, 0, 0 );
}
else {
getVertThumbIcon().paintIcon( slider, g, 0, 0 );
}
g.translate( -knobBounds.x, -knobBounds.y );
}
/**
* Returns a rectangle enclosing the track that will be painted.
*/
private Rectangle getPaintTrackRect() {
int trackLeft = 0, trackRight, trackTop = 0, trackBottom;
if (slider.getOrientation() == JSlider.HORIZONTAL) {
trackBottom = (trackRect.height - 1) - getThumbOverhang();
trackTop = trackBottom - (getTrackWidth() - 1);
trackRight = trackRect.width - 1;
}
else {
if (MetalUtils.isLeftToRight(slider)) {
trackLeft = (trackRect.width - getThumbOverhang()) -
getTrackWidth();
trackRight = (trackRect.width - getThumbOverhang()) - 1;
}
else {
trackLeft = getThumbOverhang();
trackRight = getThumbOverhang() + getTrackWidth() - 1;
}
trackBottom = trackRect.height - 1;
}
return new Rectangle(trackRect.x + trackLeft, trackRect.y + trackTop,
trackRight - trackLeft, trackBottom - trackTop);
}
public void paintTrack(Graphics g) {
if (MetalLookAndFeel.usingOcean()) {
oceanPaintTrack(g);
return;
}
Color trackColor = !slider.isEnabled() ? MetalLookAndFeel.getControlShadow() :
slider.getForeground();
boolean leftToRight = MetalUtils.isLeftToRight(slider);
g.translate( trackRect.x, trackRect.y );
int trackLeft = 0;
int trackTop = 0;
int trackRight;
int trackBottom;
// Draw the track
if ( slider.getOrientation() == JSlider.HORIZONTAL ) {
trackBottom = (trackRect.height - 1) - getThumbOverhang();
trackTop = trackBottom - (getTrackWidth() - 1);
trackRight = trackRect.width - 1;
}
else {
if (leftToRight) {
trackLeft = (trackRect.width - getThumbOverhang()) -
getTrackWidth();
trackRight = (trackRect.width - getThumbOverhang()) - 1;
}
else {
trackLeft = getThumbOverhang();
trackRight = getThumbOverhang() + getTrackWidth() - 1;
}
trackBottom = trackRect.height - 1;
}
if ( slider.isEnabled() ) {
g.setColor( MetalLookAndFeel.getControlDarkShadow() );
g.drawRect( trackLeft, trackTop,
(trackRight - trackLeft) - 1, (trackBottom - trackTop) - 1 );
g.setColor( MetalLookAndFeel.getControlHighlight() );
g.drawLine( trackLeft + 1, trackBottom, trackRight, trackBottom );
g.drawLine( trackRight, trackTop + 1, trackRight, trackBottom );
g.setColor( MetalLookAndFeel.getControlShadow() );
g.drawLine( trackLeft + 1, trackTop + 1, trackRight - 2, trackTop + 1 );
g.drawLine( trackLeft + 1, trackTop + 1, trackLeft + 1, trackBottom - 2 );
}
else {
g.setColor( MetalLookAndFeel.getControlShadow() );
g.drawRect( trackLeft, trackTop,
(trackRight - trackLeft) - 1, (trackBottom - trackTop) - 1 );
}
// Draw the fill
if ( filledSlider ) {
int middleOfThumb;
int fillTop;
int fillLeft;
int fillBottom;
int fillRight;
if ( slider.getOrientation() == JSlider.HORIZONTAL ) {
middleOfThumb = thumbRect.x + (thumbRect.width / 2);
middleOfThumb -= trackRect.x; // To compensate for the g.translate()
fillTop = !slider.isEnabled() ? trackTop : trackTop + 1;
fillBottom = !slider.isEnabled() ? trackBottom - 1 : trackBottom - 2;
if ( !drawInverted() ) {
fillLeft = !slider.isEnabled() ? trackLeft : trackLeft + 1;
fillRight = middleOfThumb;
}
else {
fillLeft = middleOfThumb;
fillRight = !slider.isEnabled() ? trackRight - 1 : trackRight - 2;
}
}
else {
middleOfThumb = thumbRect.y + (thumbRect.height / 2);
middleOfThumb -= trackRect.y; // To compensate for the g.translate()
fillLeft = !slider.isEnabled() ? trackLeft : trackLeft + 1;
fillRight = !slider.isEnabled() ? trackRight - 1 : trackRight - 2;
if ( !drawInverted() ) {
fillTop = middleOfThumb;
fillBottom = !slider.isEnabled() ? trackBottom - 1 : trackBottom - 2;
}
else {
fillTop = !slider.isEnabled() ? trackTop : trackTop + 1;
fillBottom = middleOfThumb;
}
}
if ( slider.isEnabled() ) {
g.setColor( slider.getBackground() );
g.drawLine( fillLeft, fillTop, fillRight, fillTop );
g.drawLine( fillLeft, fillTop, fillLeft, fillBottom );
g.setColor( MetalLookAndFeel.getControlShadow() );
g.fillRect( fillLeft + 1, fillTop + 1,
fillRight - fillLeft, fillBottom - fillTop );
}
else {
g.setColor( MetalLookAndFeel.getControlShadow() );
g.fillRect(fillLeft, fillTop, fillRight - fillLeft, fillBottom - fillTop);
}
}
g.translate( -trackRect.x, -trackRect.y );
}
private void oceanPaintTrack(Graphics g) {
boolean leftToRight = MetalUtils.isLeftToRight(slider);
boolean drawInverted = drawInverted();
Color sliderAltTrackColor = (Color)UIManager.get(
"Slider.altTrackColor");
// Translate to the origin of the painting rectangle
Rectangle paintRect = getPaintTrackRect();
g.translate(paintRect.x, paintRect.y);
// Width and height of the painting rectangle.
int w = paintRect.width;
int h = paintRect.height;
if (slider.getOrientation() == JSlider.HORIZONTAL) {
int middleOfThumb = thumbRect.x + thumbRect.width / 2 - paintRect.x;
if (slider.isEnabled()) {
int fillMinX;
int fillMaxX;
if (middleOfThumb > 0) {
g.setColor(drawInverted ? MetalLookAndFeel.getControlDarkShadow() :
MetalLookAndFeel.getPrimaryControlDarkShadow());
g.drawRect(0, 0, middleOfThumb - 1, h - 1);
}
if (middleOfThumb < w) {
g.setColor(drawInverted ? MetalLookAndFeel.getPrimaryControlDarkShadow() :
MetalLookAndFeel.getControlDarkShadow());
g.drawRect(middleOfThumb, 0, w - middleOfThumb - 1, h - 1);
}
if (filledSlider) {
g.setColor(MetalLookAndFeel.getPrimaryControlShadow());
if (drawInverted) {
fillMinX = middleOfThumb;
fillMaxX = w - 2;
g.drawLine(1, 1, middleOfThumb, 1);
} else {
fillMinX = 1;
fillMaxX = middleOfThumb;
g.drawLine(middleOfThumb, 1, w - 1, 1);
}
if (h == 6) {
g.setColor(MetalLookAndFeel.getWhite());
g.drawLine(fillMinX, 1, fillMaxX, 1);
g.setColor(sliderAltTrackColor);
g.drawLine(fillMinX, 2, fillMaxX, 2);
g.setColor(MetalLookAndFeel.getControlShadow());
g.drawLine(fillMinX, 3, fillMaxX, 3);
g.setColor(MetalLookAndFeel.getPrimaryControlShadow());
g.drawLine(fillMinX, 4, fillMaxX, 4);
}
}
} else {
g.setColor(MetalLookAndFeel.getControlShadow());
if (middleOfThumb > 0) {
if (!drawInverted && filledSlider) {
g.fillRect(0, 0, middleOfThumb - 1, h - 1);
} else {
g.drawRect(0, 0, middleOfThumb - 1, h - 1);
}
}
if (middleOfThumb < w) {
if (drawInverted && filledSlider) {
g.fillRect(middleOfThumb, 0, w - middleOfThumb - 1, h - 1);
} else {
g.drawRect(middleOfThumb, 0, w - middleOfThumb - 1, h - 1);
}
}
}
} else {
int middleOfThumb = thumbRect.y + (thumbRect.height / 2) - paintRect.y;
if (slider.isEnabled()) {
int fillMinY;
int fillMaxY;
if (middleOfThumb > 0) {
g.setColor(drawInverted ? MetalLookAndFeel.getPrimaryControlDarkShadow() :
MetalLookAndFeel.getControlDarkShadow());
g.drawRect(0, 0, w - 1, middleOfThumb - 1);
}
if (middleOfThumb < h) {
g.setColor(drawInverted ? MetalLookAndFeel.getControlDarkShadow() :
MetalLookAndFeel.getPrimaryControlDarkShadow());
g.drawRect(0, middleOfThumb, w - 1, h - middleOfThumb - 1);
}
if (filledSlider) {
g.setColor(MetalLookAndFeel.getPrimaryControlShadow());
if (drawInverted()) {
fillMinY = 1;
fillMaxY = middleOfThumb;
if (leftToRight) {
g.drawLine(1, middleOfThumb, 1, h - 1);
} else {
g.drawLine(w - 2, middleOfThumb, w - 2, h - 1);
}
} else {
fillMinY = middleOfThumb;
fillMaxY = h - 2;
if (leftToRight) {
g.drawLine(1, 1, 1, middleOfThumb);
} else {
g.drawLine(w - 2, 1, w - 2, middleOfThumb);
}
}
if (w == 6) {
g.setColor(leftToRight ? MetalLookAndFeel.getWhite() : MetalLookAndFeel.getPrimaryControlShadow());
g.drawLine(1, fillMinY, 1, fillMaxY);
g.setColor(leftToRight ? sliderAltTrackColor : MetalLookAndFeel.getControlShadow());
g.drawLine(2, fillMinY, 2, fillMaxY);
g.setColor(leftToRight ? MetalLookAndFeel.getControlShadow() : sliderAltTrackColor);
g.drawLine(3, fillMinY, 3, fillMaxY);
g.setColor(leftToRight ? MetalLookAndFeel.getPrimaryControlShadow() : MetalLookAndFeel.getWhite());
g.drawLine(4, fillMinY, 4, fillMaxY);
}
}
} else {
g.setColor(MetalLookAndFeel.getControlShadow());
if (middleOfThumb > 0) {
if (drawInverted && filledSlider) {
g.fillRect(0, 0, w - 1, middleOfThumb - 1);
} else {
g.drawRect(0, 0, w - 1, middleOfThumb - 1);
}
}
if (middleOfThumb < h) {
if (!drawInverted && filledSlider) {
g.fillRect(0, middleOfThumb, w - 1, h - middleOfThumb - 1);
} else {
g.drawRect(0, middleOfThumb, w - 1, h - middleOfThumb - 1);
}
}
}
}
g.translate(-paintRect.x, -paintRect.y);
}
public void paintFocus(Graphics g) {
}
protected Dimension getThumbSize() {
Dimension size = new Dimension();
if ( slider.getOrientation() == JSlider.VERTICAL ) {
size.width = getVertThumbIcon().getIconWidth();
size.height = getVertThumbIcon().getIconHeight();
}
else {
size.width = getHorizThumbIcon().getIconWidth();
size.height = getHorizThumbIcon().getIconHeight();
}
return size;
}
/**
* Gets the height of the tick area for horizontal sliders and the width of the
* tick area for vertical sliders. BasicSliderUI uses the returned value to
* determine the tick area rectangle.
*/
public int getTickLength() {
return slider.getOrientation() == JSlider.HORIZONTAL ? safeLength + TICK_BUFFER + 1 :
safeLength + TICK_BUFFER + 3;
}
/**
* Returns the shorter dimension of the track.
*/
protected int getTrackWidth() {
// This strange calculation is here to keep the
// track in proportion to the thumb.
final double kIdealTrackWidth = 7.0;
final double kIdealThumbHeight = 16.0;
final double kWidthScalar = kIdealTrackWidth / kIdealThumbHeight;
if ( slider.getOrientation() == JSlider.HORIZONTAL ) {
return (int)(kWidthScalar * thumbRect.height);
}
else {
return (int)(kWidthScalar * thumbRect.width);
}
}
/**
* Returns the longer dimension of the slide bar. (The slide bar is only the
* part that runs directly under the thumb)
*/
protected int getTrackLength() {
if ( slider.getOrientation() == JSlider.HORIZONTAL ) {
return trackRect.width;
}
return trackRect.height;
}
/**
* Returns the amount that the thumb goes past the slide bar.
*/
protected int getThumbOverhang() {
return (int)(getThumbSize().getHeight()-getTrackWidth())/2;
}
protected void scrollDueToClickInTrack( int dir ) {
scrollByUnit( dir );
}
protected void paintMinorTickForHorizSlider( Graphics g, Rectangle tickBounds, int x ) {
g.setColor( slider.isEnabled() ? slider.getForeground() : MetalLookAndFeel.getControlShadow() );
g.drawLine( x, TICK_BUFFER, x, TICK_BUFFER + (safeLength / 2) );
}
protected void paintMajorTickForHorizSlider( Graphics g, Rectangle tickBounds, int x ) {
g.setColor( slider.isEnabled() ? slider.getForeground() : MetalLookAndFeel.getControlShadow() );
g.drawLine( x, TICK_BUFFER , x, TICK_BUFFER + (safeLength - 1) );
}
protected void paintMinorTickForVertSlider( Graphics g, Rectangle tickBounds, int y ) {
g.setColor( slider.isEnabled() ? slider.getForeground() : MetalLookAndFeel.getControlShadow() );
if (MetalUtils.isLeftToRight(slider)) {
g.drawLine( TICK_BUFFER, y, TICK_BUFFER + (safeLength / 2), y );
}
else {
g.drawLine( 0, y, safeLength/2, y );
}
}
protected void paintMajorTickForVertSlider( Graphics g, Rectangle tickBounds, int y ) {
g.setColor( slider.isEnabled() ? slider.getForeground() : MetalLookAndFeel.getControlShadow() );
if (MetalUtils.isLeftToRight(slider)) {
g.drawLine( TICK_BUFFER, y, TICK_BUFFER + safeLength, y );
}
else {
g.drawLine( 0, y, safeLength, y );
}
}
}
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