ProgressBar.java

package co.forsaken.projectindigo.gui.components;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;

import javax.swing.JProgressBar;

import co.forsaken.projectindigo.IndigoLauncher;

@SuppressWarnings("serial") public class ProgressBar extends JProgressBar {

  private float  _transparency = 1f;
  private Color  activeColor   = Color.BLUE;

  public ProgressBar(float transparency) {
    _transparency = transparency;
    setFocusable(false);
    setOpaque(true);
    setStringPainted(true);
    setFont(IndigoLauncher.getMinecraftFont(14));
  }

  public void updateProgress(String reason, String subString, int percent) {
    if (percent >= 0 && percent <= 100) {
      if (!isVisible()) {
        setVisible(true);
      }
      setValue(percent);
      String text = reason;
      if (text.length() > 60) {
        text = text.substring(0, 60) + "...";
      }
      setString(percent + "% " + text);
      setValue(percent);
    }
  }

  public void updateProgress(int percent) {
    if (percent >= 0 && percent <= 100) {
      if (!isVisible()) {
        setVisible(true);
      }
      setString(percent + "%");
      setValue(percent);
    }
  }

  @Override public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g.create();

    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, _transparency));

    g2.clearRect(0, 0, getWidth(), getHeight());

    // Draw bar
    g2.setColor(Color.WHITE);
    g2.fillRect(0, 0, getWidth(), getHeight());

    // Draw progress
    g2.setColor(activeColor);
    int x = (int) (getWidth() * getPercentComplete());
    g2.fillRect(0, 0, x, getHeight());

    g2.dispose();
    g2 = (Graphics2D) g;

    if (this.isStringPainted() && getString().length() > 0) {
      g2.setFont(getFont());
      final int startWidth = (getWidth() - g2.getFontMetrics().stringWidth(getString())) / 2;
      String white = "";
      int whiteWidth = 0;
      int chars = 0;
      for (int i = 0; i < getString().length(); i++) {
        white += getString().charAt(i);
        whiteWidth = g2.getFontMetrics().stringWidth(white);
        if (startWidth + whiteWidth > x) {
          break;
        }
        chars++;
      }
      if (chars != getString().length()) {
        white = white.substring(0, white.length() - 1);
        whiteWidth = g2.getFontMetrics().stringWidth(white);
      }
      float height = getFont().getSize();
      g2.setColor(Color.WHITE);
      g2.drawString(white, startWidth, height * 1.5F);
      g2.setColor(Color.BLACK);
      g2.drawString(this.getString().substring(chars), whiteWidth + startWidth, height * 1.5F);
    }

    // Draw outline
    g2.setColor(Color.BLACK);
    g2.drawRect(0, 0, getWidth() - 1, getHeight() - 1);
    g.dispose();
  }

  public void setEnabled(boolean enabled) {
    super.setEnabled(enabled);
    setVisible(enabled);
  }

}