package com.dwave.gui;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import com.dwave.util.DMath;

public class DProgressMonitor extends JDialog implements ActionListener {
  public static final int PLAIN_TYPE = 0,
                          CANCEL_TYPE = 1;
  DLabel messageLabel,
         noteLabel;
  JProgressBar theBar;
  DButton cancelButton;
  JPanel aPanel;
  int counter = 0;
  int min;
  int max;
  float percent = 0f;
  volatile boolean cancelled = false;

  public DProgressMonitor(Frame owner, int min, int max, String title, String text, String note, int type) {
    super(owner, title, false);
    this.setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE);
    this.getContentPane().setLayout(new com.dwave.layout.VerticalFlowLayout(
                                  com.dwave.layout.VerticalFlowLayout.MIDDLE, 5, 5, true, false));
    this.setResizable(false);
    this.min = min;
    this.max = max;
    messageLabel = new DLabel(text);
    messageLabel.setVisible(true);
    noteLabel = new DLabel(note);
    noteLabel.setVisible(true);
    theBar = new JProgressBar(min, max);
    theBar.setVisible(true);
    this.getContentPane().add(messageLabel);
    this.getContentPane().add(noteLabel);
    this.getContentPane().add(theBar);

    if(type == CANCEL_TYPE) {
      aPanel = new JPanel(new FlowLayout());
      cancelButton = new DButton("Cancel");
      cancelButton.setVisible(true);
      cancelButton.addActionListener(this);
      aPanel.add(cancelButton);
      this.getContentPane().add(aPanel);
      this.setSize(300, 150);
    }
    else
      this.setSize(300, 100);

    this.setLocation((owner.getWidth()-this.getWidth()) /2, (owner.getHeight()-this.getHeight()) / 2);
//    this.paintComponents(this.getGraphics());
  }

  public void setProgress(int newValue) {
    if(!cancelled) {
      theBar.setValue(newValue);
      float f = DMath.round((float)newValue/max*100F, 1);
      setNote(f + "% completed");
      if(f > percent) {
        percent = f;
        this.paintComponents(this.getGraphics());
      }
    }
  }

  public boolean isCancelled() { return cancelled; }
  public void destroy() { this.dispose(); }
  public void setNote(String newNote) {
    if(!cancelled)
      noteLabel.setText(newNote);
  }
  public void setMessage(String newMessage) {
    if(!cancelled)
      messageLabel.setText(newMessage);
  }
  public void actionPerformed(ActionEvent e) {
    this.setMessage("Operation cancelled by user.");
    this.setNote("Please wait.....");
    this.setTitle("Cancelling.....");
    this.paintComponents(this.getGraphics());
    _cancel();
  }
  private void _cancel() {
    cancelled = true;
//    this.dispose();
  }
}