/*

 * Copyright 2002-2005 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package javax.swing.plaf.synth;

import java.awt.*;

import java.awt.geom.AffineTransform;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.event.*;

import javax.swing.plaf.*;

import javax.swing.plaf.basic.BasicProgressBarUI;

import java.beans.PropertyChangeListener;

import java.beans.PropertyChangeEvent;

import java.io.Serializable;

import sun.swing.plaf.synth.SynthUI;

import sun.swing.SwingUtilities2;

/**

 * Synth's ProgressBarUI.

 *

 * @author Joshua Outwater

 */

class SynthProgressBarUI extends BasicProgressBarUI implements SynthUI,

        PropertyChangeListener {

    private SynthStyle style;

    private int progressPadding;

    private boolean paintOutsideClip;

    public static ComponentUI createUI(JComponent x) {

        return new SynthProgressBarUI();

    }

    protected void installListeners() {

        super.installListeners();

        progressBar.addPropertyChangeListener(this);

    }

    protected void uninstallListeners() {

        super.uninstallListeners();

        progressBar.removePropertyChangeListener(this);

    }

    protected void installDefaults() {

        updateStyle(progressBar);

    }

    private void updateStyle(JProgressBar c) {

        SynthContext context = getContext(c, ENABLED);

        SynthStyle oldStyle = style;

        style = SynthLookAndFeel.updateStyle(context, this);

        if (style != oldStyle) {

            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);

        }

        context.dispose();

    }

    protected void uninstallDefaults() {

        SynthContext context = getContext(progressBar, ENABLED);

        style.uninstallDefaults(context);

        context.dispose();

        style = null;

    }

    public SynthContext getContext(JComponent c) {

        return getContext(c, getComponentState(c));

    }

    private SynthContext getContext(JComponent c, int state) {

        return SynthContext.getContext(SynthContext.class, c,

                            SynthLookAndFeel.getRegion(c), style, state);

    }

    private Region getRegion(JComponent c) {

        return SynthLookAndFeel.getRegion(c);

    }

    private int getComponentState(JComponent c) {

        return SynthLookAndFeel.getComponentState(c);

    }

    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);

            context.dispose();

            return (height - metrics.getAscent() - metrics.getDescent()) / 2 +

                    metrics.getAscent();

        }

        return -1;

    }

    protected void setAnimationIndex(int newValue) {

        if (paintOutsideClip) {

            if (getAnimationIndex() == newValue) {

                return;

            }

            super.setAnimationIndex(newValue);

            progressBar.repaint();

        } else {

            super.setAnimationIndex(newValue);

        }

    }

    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);

        context.dispose();

    }

    public void paint(Graphics g, JComponent c) {

        SynthContext context = getContext(c);

        paint(context, g);

        context.dispose();

    }

    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;

                    }

                } 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;

                    // When the progress bar is vertical we always paint

                    // from bottom to top, not matter what the component

                    // orientation is.

                }

            }

        } else {

            boxRect = getBox(boxRect);

            x = boxRect.x + progressPadding;

            y = boxRect.y + progressPadding;

            width = boxRect.width - progressPadding - progressPadding;

            height = boxRect.height - progressPadding - progressPadding;

        }

        context.getPainter().paintProgressBarForeground(context, g,

                x, y, width, height, pBar.getOrientation());

        if (pBar.isStringPainted() && !pBar.isIndeterminate()) {

            paintText(context, g, pBar.getString());

        }

    }

    protected void paintText(SynthContext context, Graphics g,

            String title) {

        Font font = context.getStyle().getFont(context);

        FontMetrics metrics = SwingUtilities2.getFontMetrics(progressBar, g,

                                                             font);

        if (progressBar.isStringPainted()) {

            String pBarString = progressBar.getString();

            Rectangle bounds = progressBar.getBounds();

            int strLength = context.getStyle().getGraphicsUtils(context).

                computeStringWidth(context, font, metrics, pBarString);

            // Calculate the bounds for the text.

            Rectangle textRect = new Rectangle(

                (bounds.width / 2) - (strLength / 2),

                (bounds.height -

                    (metrics.getAscent() + metrics.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.

            SynthStyle style = context.getStyle();

            g.setColor(style.getColor(context, ColorType.TEXT_FOREGROUND));

            g.setFont(style.getFont(context));

            style.getGraphicsUtils(context).paintText(context, g, title,

                                                 textRect.x, textRect.y, -1);

        }

    }

    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());

    }

    public void propertyChange(PropertyChangeEvent e) {

        if (SynthLookAndFeel.shouldUpdateStyle(e)) {

            updateStyle((JProgressBar)e.getSource());

        }

    }

    public Dimension getPreferredSize(JComponent c) {

        Dimension       size;

        Insets          border = progressBar.getInsets();

        FontMetrics     fontSizer = progressBar.getFontMetrics(

                                                  progressBar.getFont());

        if (progressBar.getOrientation() == JProgressBar.HORIZONTAL) {

            size = new Dimension(getPreferredInnerHorizontal());

        } else {

            size = new Dimension(getPreferredInnerVertical());

        }

        // Ensure that the progress string will fit.

        if (progressBar.isStringPainted()) {

            String progString = progressBar.getString();

            int stringHeight = fontSizer.getHeight() +

                    fontSizer.getDescent();

            if (stringHeight > size.height) {

                size.height = stringHeight;

            }

            // This is also for completeness.

            int stringWidth = SwingUtilities2.stringWidth(

                                   progressBar, fontSizer, progString);

            if (stringWidth > size.width) {

                size.width = stringWidth;

            }

        }

        size.width += border.left + border.right;

        size.height += border.top + border.bottom;

        return size;

   }

}