https://openjdk.java.net/ 
/*
 * Copyright (c) 2002, 2015, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javax.swing.plaf.synth;

import java.awt.*;
import java.awt.geom.AffineTransform;
import javax.swing.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.BasicProgressBarUI;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import sun.swing.SwingUtilities2;


Provides the Synth L&F UI delegate for JProgressBar. 
Author:Joshua Outwater
Since:1.7
/**
 * Provides the Synth L&F UI delegate for
 * {@link javax.swing.JProgressBar}.
 *
 * @author Joshua Outwater
 * @since 1.7
 */
public class SynthProgressBarUI extends BasicProgressBarUI
                                implements SynthUI, PropertyChangeListener {
    private SynthStyle style;
    private int progressPadding;
    private boolean rotateText; // added for Nimbus LAF
    private boolean paintOutsideClip;
    private boolean tileWhenIndeterminate; //whether to tile indeterminate painting
    private int tileWidth; //the width of each tile
    private Dimension minBarSize; // minimal visible bar size
    private int glowWidth; // Glow around the bar foreground

    
Constructs a SynthProgressBarUI. 
/**
     *
     * Constructs a {@code SynthProgressBarUI}.
     */
    public SynthProgressBarUI() {}

    
Creates a new UI object for the given component.

Params:
  • x – component to create UI object for
Returns:the UI object
/**
     * Creates a new UI object for the given component.
     *
     * @param x component to create UI object for
     * @return the UI object
     */
    public static ComponentUI createUI(JComponent x) {
        return new SynthProgressBarUI();
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    protected void installListeners() {
        super.installListeners();
        progressBar.addPropertyChangeListener(this);
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    protected void uninstallListeners() {
        super.uninstallListeners();
        progressBar.removePropertyChangeListener(this);
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    protected void installDefaults() {
        updateStyle(progressBar);
    }

    private void updateStyle(JProgressBar c) {
        SynthContext context = getContext(c, ENABLED);
        SynthStyle oldStyle = style;
        style = SynthLookAndFeel.updateStyle(context, this);
        setCellLength(style.getInt(context, "ProgressBar.cellLength", 1));
        setCellSpacing(style.getInt(context, "ProgressBar.cellSpacing", 0));
        progressPadding = style.getInt(context,
                "ProgressBar.progressPadding", 0);
        paintOutsideClip = style.getBoolean(context,
                "ProgressBar.paintOutsideClip", false);
        rotateText = style.getBoolean(context,
                "ProgressBar.rotateText", false);
        tileWhenIndeterminate = style.getBoolean(context, "ProgressBar.tileWhenIndeterminate", false);
        tileWidth = style.getInt(context, "ProgressBar.tileWidth", 15);
        // handle scaling for sizeVarients for special case components. The
        // key "JComponent.sizeVariant" scales for large/small/mini
        // components are based on Apples LAF
        String scaleKey = (String)progressBar.getClientProperty(
                "JComponent.sizeVariant");
        if (scaleKey != null){
            if ("large".equals(scaleKey)){
                tileWidth *= 1.15;
            } else if ("small".equals(scaleKey)){
                tileWidth *= 0.857;
            } else if ("mini".equals(scaleKey)){
                tileWidth *= 0.784;
            }
        }
        minBarSize = (Dimension)style.get(context, "ProgressBar.minBarSize");
        glowWidth = style.getInt(context, "ProgressBar.glowWidth", 0);
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    protected void uninstallDefaults() {
        SynthContext context = getContext(progressBar, ENABLED);

        style.uninstallDefaults(context);
        style = null;
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    public SynthContext getContext(JComponent c) {
        return getContext(c, getComponentState(c));
    }

    private SynthContext getContext(JComponent c, int state) {
        return SynthContext.getContext(c, style, state);
    }

    private int getComponentState(JComponent c) {
        return SynthLookAndFeel.getComponentState(c);
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    public int getBaseline(JComponent c, int width, int height) {
        super.getBaseline(c, width, height);
        if (progressBar.isStringPainted() &&
                progressBar.getOrientation() == JProgressBar.HORIZONTAL) {
            SynthContext context = getContext(c);
            Font font = context.getStyle().getFont(context);
            FontMetrics metrics = progressBar.getFontMetrics(font);
            return (height - metrics.getAscent() - metrics.getDescent()) / 2 +
                    metrics.getAscent();
        }
        return -1;
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    protected Rectangle getBox(Rectangle r) {
        if (tileWhenIndeterminate) {
            return SwingUtilities.calculateInnerArea(progressBar, r);
        } else {
            return super.getBox(r);
        }
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    protected void setAnimationIndex(int newValue) {
        if (paintOutsideClip) {
            if (getAnimationIndex() == newValue) {
                return;
            }
            super.setAnimationIndex(newValue);
            progressBar.repaint();
        } else {
            super.setAnimationIndex(newValue);
        }
    }

    
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. 
Params:
  • g – the Graphics object used for painting
  • c – the component being painted
See Also:
/**
     * Notifies this UI delegate to repaint the specified component.
     * This method paints the component background, then calls
     * the {@link #paint(SynthContext,Graphics)} method.
     *
     * <p>In general, this method does not need to be overridden by subclasses.
     * All Look and Feel rendering code should reside in the {@code paint} method.
     *
     * @param g the {@code Graphics} object used for painting
     * @param c the component being painted
     * @see #paint(SynthContext,Graphics)
     */
    @Override
    public void update(Graphics g, JComponent c) {
        SynthContext context = getContext(c);

        SynthLookAndFeel.update(context, g);
        context.getPainter().paintProgressBarBackground(context,
                          g, 0, 0, c.getWidth(), c.getHeight(),
                          progressBar.getOrientation());
        paint(context, g);
    }

    
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. 
Params:
  • g – the Graphics object used for painting
  • c – the component being painted
See Also:
/**
     * Paints the specified component according to the Look and Feel.
     * <p>This method is not used by Synth Look and Feel.
     * Painting is handled by the {@link #paint(SynthContext,Graphics)} method.
     *
     * @param g the {@code Graphics} object used for painting
     * @param c the component being painted
     * @see #paint(SynthContext,Graphics)
     */
    @Override
    public void paint(Graphics g, JComponent c) {
        SynthContext context = getContext(c);

        paint(context, g);
    }

    
Paints the specified component.

Params:
  • context – context for the component being painted
  • g – the Graphics object used for painting
See Also:
/**
     * Paints the specified component.
     *
     * @param context context for the component being painted
     * @param g the {@code Graphics} object used for painting
     * @see #update(Graphics,JComponent)
     */
    protected void paint(SynthContext context, Graphics g) {
        JProgressBar pBar = (JProgressBar)context.getComponent();
        int x = 0, y = 0, width = 0, height = 0;
        if (!pBar.isIndeterminate()) {
            Insets pBarInsets = pBar.getInsets();
            double percentComplete = pBar.getPercentComplete();
            if (percentComplete != 0.0) {
                if (pBar.getOrientation() == JProgressBar.HORIZONTAL) {
                    x = pBarInsets.left + progressPadding;
                    y = pBarInsets.top + progressPadding;
                    width = (int)(percentComplete * (pBar.getWidth()
                            - (pBarInsets.left + progressPadding
                             + pBarInsets.right + progressPadding)));
                    height = pBar.getHeight()
                            - (pBarInsets.top + progressPadding
                             + pBarInsets.bottom + progressPadding);

                    if (!SynthLookAndFeel.isLeftToRight(pBar)) {
                        x = pBar.getWidth() - pBarInsets.right - width
                                - progressPadding - glowWidth;
                    }
                } else {  // JProgressBar.VERTICAL
                    x = pBarInsets.left + progressPadding;
                    width = pBar.getWidth()
                            - (pBarInsets.left + progressPadding
                            + pBarInsets.right + progressPadding);
                    height = (int)(percentComplete * (pBar.getHeight()
                            - (pBarInsets.top + progressPadding
                             + pBarInsets.bottom + progressPadding)));
                    y = pBar.getHeight() - pBarInsets.bottom - height
                            - progressPadding;

                    if (SynthLookAndFeel.isLeftToRight(pBar)) {
                        y -= glowWidth;
                    }
                }
            }
        } else {
            boxRect = getBox(boxRect);
            x = boxRect.x + progressPadding;
            y = boxRect.y + progressPadding;
            width = boxRect.width - progressPadding - progressPadding;
            height = boxRect.height - progressPadding - progressPadding;
        }

        //if tiling and indeterminate, then paint the progress bar foreground a
        //bit wider than it should be. Shift as needed to ensure that there is
        //an animated effect
        if (tileWhenIndeterminate && pBar.isIndeterminate()) {
            double percentComplete = (double)getAnimationIndex() / (double)getFrameCount();
            int offset = (int)(percentComplete * tileWidth);
            Shape clip = g.getClip();
            g.clipRect(x, y, width, height);
            if (pBar.getOrientation() == JProgressBar.HORIZONTAL) {
                //paint each tile horizontally
                for (int i=x-tileWidth+offset; i<=width; i+=tileWidth) {
                    context.getPainter().paintProgressBarForeground(
                            context, g, i, y, tileWidth, height, pBar.getOrientation());
                }
            } else { //JProgressBar.VERTICAL
                //paint each tile vertically
                for (int i=y-offset; i<height+tileWidth; i+=tileWidth) {
                    context.getPainter().paintProgressBarForeground(
                            context, g, x, i, width, tileWidth, pBar.getOrientation());
                }
            }
            g.setClip(clip);
        } else {
            if (minBarSize == null || (width >= minBarSize.width
                    && height >= minBarSize.height)) {
                context.getPainter().paintProgressBarForeground(context, g,
                        x, y, width, height, pBar.getOrientation());
            }
        }

        if (pBar.isStringPainted()) {
            paintText(context, g, pBar.getString());
        }
    }

    
Paints the component's text.

Params:
  • context – context for the component being painted
  • g – Graphics object used for painting
  • title – the text to paint
/**
     * Paints the component's text.
     *
     * @param context context for the component being painted
     * @param g {@code Graphics} object used for painting
     * @param title the text to paint
     */
    protected void paintText(SynthContext context, Graphics g, String title) {
        if (progressBar.isStringPainted()) {
            SynthStyle style = context.getStyle();
            Font font = style.getFont(context);
            FontMetrics fm = SwingUtilities2.getFontMetrics(
                    progressBar, g, font);
            int strLength = style.getGraphicsUtils(context).
                computeStringWidth(context, font, fm, title);
            Rectangle bounds = progressBar.getBounds();

            if (rotateText &&
                    progressBar.getOrientation() == JProgressBar.VERTICAL){
                Graphics2D g2 = (Graphics2D)g;
                // Calculate the position for the text.
                Point textPos;
                AffineTransform rotation;
                if (progressBar.getComponentOrientation().isLeftToRight()){
                    rotation = AffineTransform.getRotateInstance(-Math.PI/2);
                    textPos = new Point(
                        (bounds.width+fm.getAscent()-fm.getDescent())/2,
                           (bounds.height+strLength)/2);
                } else {
                    rotation = AffineTransform.getRotateInstance(Math.PI/2);
                    textPos = new Point(
                        (bounds.width-fm.getAscent()+fm.getDescent())/2,
                           (bounds.height-strLength)/2);
                }

                // Progress bar isn't wide enough for the font.  Don't paint it.
                if (textPos.x < 0) {
                    return;
                }

                // Paint the text.
                font = font.deriveFont(rotation);
                g2.setFont(font);
                g2.setColor(style.getColor(context, ColorType.TEXT_FOREGROUND));
                style.getGraphicsUtils(context).paintText(context, g, title,
                                                     textPos.x, textPos.y, -1);
            } else {
                // Calculate the bounds for the text.
                Rectangle textRect = new Rectangle(
                    (bounds.width / 2) - (strLength / 2),
                    (bounds.height -
                        (fm.getAscent() + fm.getDescent())) / 2,
                    0, 0);

                // Progress bar isn't tall enough for the font.  Don't paint it.
                if (textRect.y < 0) {
                    return;
                }

                // Paint the text.
                g.setColor(style.getColor(context, ColorType.TEXT_FOREGROUND));
                g.setFont(font);
                style.getGraphicsUtils(context).paintText(context, g, title,
                                                     textRect.x, textRect.y, -1);
            }
        }
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    public void paintBorder(SynthContext context, Graphics g, int x,
                            int y, int w, int h) {
        context.getPainter().paintProgressBarBorder(context, g, x, y, w, h,
                                                    progressBar.getOrientation());
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    public void propertyChange(PropertyChangeEvent e) {
        if (SynthLookAndFeel.shouldUpdateStyle(e) ||
                "indeterminate".equals(e.getPropertyName())) {
            updateStyle((JProgressBar)e.getSource());
        }
    }

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    @Override
    public Dimension getPreferredSize(JComponent c) {
        Dimension size = null;
        Insets border = progressBar.getInsets();
        FontMetrics fontSizer = progressBar.getFontMetrics(progressBar.getFont());
        String progString = progressBar.getString();
        int stringHeight = fontSizer.getHeight() + fontSizer.getDescent();

        if (progressBar.getOrientation() == JProgressBar.HORIZONTAL) {
            size = new Dimension(getPreferredInnerHorizontal());
            if (progressBar.isStringPainted()) {
                // adjust the height if necessary to make room for the string
                if (stringHeight > size.height) {
                    size.height = stringHeight;
                }

                // adjust the width if necessary to make room for the string
                int stringWidth = SwingUtilities2.stringWidth(
                                       progressBar, fontSizer, progString);
                if (stringWidth > size.width) {
                    size.width = stringWidth;
                }
            }
        } else {
            size = new Dimension(getPreferredInnerVertical());
            if (progressBar.isStringPainted()) {
                // make sure the width is big enough for the string
                if (stringHeight > size.width) {
                    size.width = stringHeight;
                }

                // make sure the height is big enough for the string
                int stringWidth = SwingUtilities2.stringWidth(
                                       progressBar, fontSizer, progString);
                if (stringWidth > size.height) {
                    size.height = stringWidth;
                }
            }
        }

        // handle scaling for sizeVarients for special case components. The
        // key "JComponent.sizeVariant" scales for large/small/mini
        // components are based on Apples LAF
        String scaleKey = (String)progressBar.getClientProperty(
                "JComponent.sizeVariant");
        if (scaleKey != null){
            if ("large".equals(scaleKey)){
                size.width *= 1.15f;
                size.height *= 1.15f;
            } else if ("small".equals(scaleKey)){
                size.width *= 0.90f;
                size.height *= 0.90f;
            } else if ("mini".equals(scaleKey)){
                size.width *= 0.784f;
                size.height *= 0.784f;
            }
        }

        size.width += border.left + border.right;
        size.height += border.top + border.bottom;

        return size;
    }
}