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/*
 * Copyright (c) 2002 and later by MH Software-Entwicklung. All Rights Reserved.
 *  
 * JTattoo is multiple licensed. If your are an open source developer you can use
 * it under the terms and conditions of the GNU General Public License version 2.0
 * or later as published by the Free Software Foundation.
 *  
 * see: gpl-2.0.txt
 * 
 * If you pay for a license you will become a registered user who could use the
 * software under the terms and conditions of the GNU Lesser General Public License
 * version 2.0 or later with classpath exception as published by the Free Software
 * Foundation.
 * 
 * see: lgpl-2.0.txt
 * see: classpath-exception.txt
 * 
 * Registered users could also use JTattoo under the terms and conditions of the 
 * Apache License, Version 2.0 as published by the Apache Software Foundation.
 *  
 * see: APACHE-LICENSE-2.0.txt
 */

package com.jtattoo.plaf;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.JComponent;
import javax.swing.JProgressBar;
import javax.swing.UIManager;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.UIResource;
import javax.swing.plaf.basic.BasicProgressBarUI;

/**
 * @author Michael Hagen
 */
public class BaseProgressBarUI extends BasicProgressBarUI {

  protected PropertyChangeListener propertyChangeListener;

  public static ComponentUI createUI(JComponent c) {
    return new BaseProgressBarUI();
  }

  public void installUI(JComponent c) {
    super.installUI(c);
    c.setBorder(UIManager.getBorder("ProgressBar.border"));
    propertyChangeListener = new PropertyChangeHandler();
    c.addPropertyChangeListener(propertyChangeListener);
  }

  public void uninstallUI(JComponent c) {
    c.removePropertyChangeListener(propertyChangeListener);
    super.uninstallUI(c);
  }

  /*
   * The "selectionForeground" is the color of the text when it is painted over a filled area of the progress bar.
   */
  protected Color getSelectionForeground() {
    Object selectionForeground = progressBar.getClientProperty("selectionForeground");
    if (selectionForeground instanceof Color) {
      return (Color) selectionForeground;
    }
    return super.getSelectionForeground();
  }

  /*
   * The "selectionBackground" is the color of the text when it is painted over an unfilled area of the progress bar.
   */
  protected Color getSelectionBackground() {
    Object selectionBackground = progressBar.getClientProperty("selectionBackground");
    if (selectionBackground instanceof Color) {
      return (Color) selectionBackground;
    }
    return super.getSelectionBackground();
  }

  private void paintString(Graphics g, int x, int y, int width, int height, int fillStart, int amountFull, Insets b) {
    if (!(g instanceof Graphics2D)) {
      return;
    }

    Graphics2D g2D = (Graphics2D) g;
    String progressString = progressBar.getString();
    g2D.setFont(progressBar.getFont());
    Point renderLocation = getStringPlacement(g2D, progressString, x, y, width, height);
    Rectangle savedClip = g2D.getClipBounds();

    if (progressBar.getOrientation() == JProgressBar.HORIZONTAL) {
      g2D.setColor(getSelectionBackground());
      JTattooUtilities.drawString(progressBar, g2D, progressString, renderLocation.x, renderLocation.y);
      g2D.setColor(getSelectionForeground());
      g2D.clipRect(fillStart, y, amountFull, height);
      JTattooUtilities.drawString(progressBar, g2D, progressString, renderLocation.x, renderLocation.y);
    }
    else { // VERTICAL
      g2D.setColor(getSelectionBackground());
      AffineTransform rotate = AffineTransform.getRotateInstance(Math.PI / 2);
      g2D.setFont(progressBar.getFont().deriveFont(rotate));
      renderLocation = getStringPlacement(g2D, progressString, x, y, width, height);
      JTattooUtilities.drawString(progressBar, g2D, progressString, renderLocation.x, renderLocation.y);
      g2D.setColor(getSelectionForeground());
      g2D.clipRect(x, fillStart, width, amountFull);
      JTattooUtilities.drawString(progressBar, g2D, progressString, renderLocation.x, renderLocation.y);
    }
    g2D.setClip(savedClip);
  }

  protected void paintString(Graphics g, int x, int y, int width, int height, int amountFull, Insets b) {
    boolean indeterminate = false;
    if (JTattooUtilities.getJavaVersion() >= 1.6) {
      indeterminate = progressBar.isIndeterminate();
    }
    if (progressBar.getOrientation() == JProgressBar.HORIZONTAL) {
      if (JTattooUtilities.isLeftToRight(progressBar)) {
        if (indeterminate) {
          boxRect = getBox(boxRect);
          paintString(g, x, y, width, height, boxRect.x, boxRect.width, b);
        }
        else {
          paintString(g, x, y, width, height, x, amountFull, b);
        }
      }
      else {
        paintString(g, x, y, width, height, x + width - amountFull, amountFull, b);
      }
    }
    else {
      if (indeterminate) {
        boxRect = getBox(boxRect);
        paintString(g, x, y, width, height, boxRect.y, boxRect.height, b);
      }
      else {
        paintString(g, x, y, width, height, y + height - amountFull, amountFull, b);
      }
    }
  }

  protected void paintIndeterminate(Graphics g, JComponent c) {
    if (!(g instanceof Graphics2D)) {
      return;
    }
    Graphics2D g2D = (Graphics2D) g;

    Insets b = progressBar.getInsets(); // area for border
    int barRectWidth = progressBar.getWidth() - (b.right + b.left);
    int barRectHeight = progressBar.getHeight() - (b.top + b.bottom);

    Color colors[];
    if (progressBar.getForeground() instanceof UIResource) {
      if (!JTattooUtilities.isActive(c)) {
        colors = AbstractLookAndFeel.getTheme().getInActiveColors();
      }
      else if (c.isEnabled()) {
        colors = AbstractLookAndFeel.getTheme().getProgressBarColors();
      }
      else {
        colors = AbstractLookAndFeel.getTheme().getDisabledColors();
      }
    }
    else {
      Color hiColor = ColorHelper.brighter(progressBar.getForeground(), 40);
      Color loColor = ColorHelper.darker(progressBar.getForeground(), 20);
      colors = ColorHelper.createColorArr(hiColor, loColor, 20);
    }

    Color cHi = ColorHelper.darker(colors[colors.length - 1], 5);
    Color cLo = ColorHelper.darker(colors[colors.length - 1], 10);

    // Paint the bouncing box.
    Rectangle box = getBox(null);
    if (box != null) {
      g2D.setColor(progressBar.getForeground());
      JTattooUtilities.draw3DBorder(g, cHi, cLo, box.x + 1, box.y + 1, box.width - 2, box.height - 2);
      if (progressBar.getOrientation() == JProgressBar.HORIZONTAL) {
        JTattooUtilities.fillHorGradient(g, colors, box.x + 2, box.y + 2, box.width - 4, box.height - 4);
      }
      else {
        JTattooUtilities.fillVerGradient(g, colors, box.x + 2, box.y + 2, box.width - 4, box.height - 4);
      }

      // Deal with possible text painting
      if (progressBar.isStringPainted()) {
        Object savedRenderingHint = null;
        if (AbstractLookAndFeel.getTheme().isTextAntiAliasingOn()) {
          savedRenderingHint = g2D.getRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING);
          g2D.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, AbstractLookAndFeel.getTheme().getTextAntiAliasingHint());
        }
        if (progressBar.getOrientation() == JProgressBar.HORIZONTAL) {
          paintString(g2D, b.left, b.top, barRectWidth, barRectHeight, box.width, b);
        }
        else {
          paintString(g2D, b.left, b.top, barRectWidth, barRectHeight, box.height, b);
        }
        if (AbstractLookAndFeel.getTheme().isTextAntiAliasingOn()) {
          g2D.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, savedRenderingHint);
        }
      }
    }
  }

  protected void paintDeterminate(Graphics g, JComponent c) {
    if (!(g instanceof Graphics2D)) {
      return;
    }

    Graphics2D g2D = (Graphics2D) g;
    Insets b = progressBar.getInsets(); // area for border
    int w = progressBar.getWidth() - (b.right + b.left);
    int h = progressBar.getHeight() - (b.top + b.bottom);

    // amount of progress to draw
    int amountFull = getAmountFull(b, w, h);
    Color colors[];
    if (progressBar.getForeground() instanceof UIResource) {
      if (!JTattooUtilities.isActive(c)) {
        colors = AbstractLookAndFeel.getTheme().getInActiveColors();
      }
      else if (c.isEnabled()) {
        colors = AbstractLookAndFeel.getTheme().getProgressBarColors();
      }
      else {
        colors = AbstractLookAndFeel.getTheme().getDisabledColors();
      }
    }
    else {
      Color hiColor = ColorHelper.brighter(progressBar.getForeground(), 40);
      Color loColor = ColorHelper.darker(progressBar.getForeground(), 20);
      colors = ColorHelper.createColorArr(hiColor, loColor, 20);
    }
    Color cHi = ColorHelper.darker(colors[colors.length - 1], 5);
    Color cLo = ColorHelper.darker(colors[colors.length - 1], 10);
    if (progressBar.getOrientation() == JProgressBar.HORIZONTAL) {
      if (JTattooUtilities.isLeftToRight(progressBar)) {
        JTattooUtilities.draw3DBorder(g, cHi, cLo, 1 + b.left, 2, amountFull - 2, h - 2);
        JTattooUtilities.fillHorGradient(g, colors, 2 + b.left, 3, amountFull - 4, h - 4);
      }
      else {
        JTattooUtilities.draw3DBorder(g, cHi, cLo, progressBar.getWidth() - amountFull - b.right + 2, 2, amountFull - 2, h - 2);
        JTattooUtilities.fillHorGradient(g, colors, progressBar.getWidth() - amountFull - b.right + 3, 3, amountFull - 4, h - 4);
      }
    }
    else { // VERTICAL
      JTattooUtilities.draw3DBorder(g, cHi, cLo, 2, h - amountFull + 2, w - 2, amountFull - 2);
      JTattooUtilities.fillVerGradient(g, colors, 3, h - amountFull + 3, w - 4, amountFull - 4);
    }

    // Deal with possible text painting
    if (progressBar.isStringPainted()) {
      Object savedRenderingHint = null;
      if (AbstractLookAndFeel.getTheme().isTextAntiAliasingOn()) {
        savedRenderingHint = g2D.getRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING);
        g2D.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, AbstractLookAndFeel.getTheme().getTextAntiAliasingHint());
      }
      paintString(g, b.left, b.top, w, h, amountFull, b);
      if (AbstractLookAndFeel.getTheme().isTextAntiAliasingOn()) {
        g2D.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, savedRenderingHint);
      }
    }
  }

  public void paint(Graphics g, JComponent c) {
    if (JTattooUtilities.getJavaVersion() >= 1.4) {
      if (progressBar.isIndeterminate()) {
        paintIndeterminate(g, c);
      }
      else {
        paintDeterminate(g, c);
      }
    }
    else {
      paintDeterminate(g, c);
    }
  }

  // -----------------------------------------------------------------------------------------------
  protected class PropertyChangeHandler implements PropertyChangeListener {

    public void propertyChange(PropertyChangeEvent e) {
      if ("selectionForeground".equals(e.getPropertyName()) && (e.getNewValue() instanceof Color)) {
        progressBar.invalidate();
        progressBar.repaint();
      }
      else if ("selectionBackground".equals(e.getPropertyName()) && (e.getNewValue() instanceof Color)) {
        progressBar.invalidate();
        progressBar.repaint();
      }
    }
  }
}




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