/*
	ChibiPaint
    Copyright (c) 2006-2008 Marc Schefer

    This file is part of ChibiPaint.

    ChibiPaint is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    ChibiPaint 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 for more details.

    You should have received a copy of the GNU General Public License
    along with ChibiPaint. If not, see <http://www.gnu.org/licenses/>.

 */

package chibipaint.gui;

import java.awt.*;
import java.awt.event.*;
import java.text.*;

import javax.swing.*;

import chibipaint.*;
import chibipaint.engine.*;

public class CPStatusBar extends JPanel implements CPController.ICPViewListener, CPController.ICPEventListener {

	CPController controller;
	JLabel memory, zoom;

	public CPStatusBar(CPController controller) {
		super(new BorderLayout());
		this.controller = controller;

		zoom = new JLabel("Zoom: 100%");
		add(zoom, BorderLayout.LINE_START);

		memory = new JLabel("");
		add(memory, BorderLayout.LINE_END);
		memory.addMouseListener(new MouseAdapter() {

			public void mouseClicked(MouseEvent e) {
				if (e.getClickCount() == 2) {
					Runtime r = Runtime.getRuntime();
					r.gc();
				}
			}
		});

		updateMemory();
		controller.addViewListener(this);
		// controller.addCPEventListener(this);

		Timer timer = new Timer(2000, new ActionListener() {

			public void actionPerformed(ActionEvent e) {
				updateMemory();
			}
		});
		timer.setRepeats(true);
		timer.start();
	}

	public void viewChange(CPController.CPViewInfo viewInfo) {
		DecimalFormat format = new DecimalFormat("0.0%");
		zoom.setText("Zoom: " + format.format(viewInfo.zoom));
	}

	public void updateMemory() {
		DecimalFormat format = new DecimalFormat("0.0");

		Runtime rt = java.lang.Runtime.getRuntime();
		float maxMemory = rt.maxMemory() / (1024f * 1024f);
		float totalUsed = (rt.totalMemory() - rt.freeMemory()) / (1024f * 1024f);
		float docMem = 0;
		float undoMem = 0;

		CPArtwork artwork = controller.getArtwork();
		if (artwork != null) {
			docMem = artwork.getDocMemoryUsed() / (1024f * 1024f);
			undoMem = artwork.getUndoMemoryUsed() / (1024f * 1024f);
		}

		if ((docMem + undoMem) / maxMemory > .5) {
			memory.setForeground(Color.RED);
		} else {
			memory.setForeground(Color.BLACK);
		}

		memory.setText("Mem: " + format.format(totalUsed) + "/" + format.format(maxMemory) + ",D"
				+ format.format(docMem) + " U" + format.format(undoMem));
	}

	public void cpEvent() {
		updateMemory();
	}
}