/**
 * Copyright 2004-2006 DFKI GmbH.
 * All Rights Reserved.  Use is subject to license terms.
 *
 * This file is part of MARY TTS.
 *
 * MARY TTS is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, version 3 of the License.
 *
 * This program 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package marytts.signalproc.display;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Component;
import java.awt.Composite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.swing.JPanel;
import javax.swing.SwingUtilities;

/**
 * Represent the glass layer in front of the function graph.
 * 
 * @author Marc Schröder
 * 
 */
public class CursorDisplayer extends JPanel implements CursorListener {
	protected List cursorSources;

	public CursorDisplayer() {
		super();
		setOpaque(false);
		setVisible(true);
		cursorSources = new ArrayList();
	}

	public void addCursorSource(CursorSource s) {
		cursorSources.add(s);
	}

	public CursorSource[] getCursorSources() {
		return (CursorSource[]) cursorSources.toArray(new CursorSource[0]);
	}

	public boolean removeCursorSource(CursorSource s) {
		return cursorSources.remove(s);
	}

	public void paintComponent(Graphics gr) {
		Graphics2D g = (Graphics2D) gr;
		for (Iterator it = cursorSources.iterator(); it.hasNext();) {
			CursorSource source = (CursorSource) it.next();
			CursorLine positionCursor = source.getPositionCursor();
			if (positionCursor != null) {
				int x = positionCursor.getX(this);
				g.setColor(positionCursor.getColor());
				g.drawLine(x, positionCursor.getYMin(this), x, positionCursor.getYMax(this));
			}
			CursorLine rangeCursor = source.getRangeCursor();
			if (rangeCursor != null) {
				int x = rangeCursor.getX(this);
				g.setColor(rangeCursor.getColor());
				g.drawLine(x, rangeCursor.getYMin(this), x, rangeCursor.getYMax(this));
			}
			if (positionCursor != null && rangeCursor != null) {
				Composite origC = g.getComposite();
				AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.3f);
				g.setComposite(ac);
				g.fillRect(positionCursor.getX(this), positionCursor.getYMin(this),
						rangeCursor.getX(this) - positionCursor.getX(this),
						rangeCursor.getYMax(this) - positionCursor.getYMin(this));
				g.setComposite(origC);
			}

			Label valueLabel = source.getValueLabel();
			if (valueLabel != null) {
				g.setColor(valueLabel.getColor());
				g.drawString(valueLabel.getText(), valueLabel.getX(this), valueLabel.getY(this));
			}
		}
	}

	public void updateCursorPosition(CursorEvent e) {
		repaint();
	}

	public static class CursorLine {
		protected Component source;
		protected int sourceX;
		protected int sourceYMin;
		protected int sourceYMax;
		protected Color color;

		public CursorLine(Component source) {
			this(source, -1, -1, -1);
		}

		public CursorLine(Component source, int sourceX, int sourceYMin, int sourceYMax) {
			this(source, sourceX, sourceYMin, sourceYMax, Color.RED);
		}

		public CursorLine(Component source, int sourceX, int sourceYMin, int sourceYMax, Color color) {
			this.source = source;
			this.sourceX = sourceX;
			this.sourceYMin = sourceYMin;
			this.sourceYMax = sourceYMax;
			this.color = color;
		}

		public void setSourceX(int sourceX) {
			this.sourceX = sourceX;
		}

		public void setSourceYMin(int sourceYMin) {
			this.sourceYMin = sourceYMin;
		}

		public void setSourceYMax(int sourceYMax) {
			this.sourceYMax = sourceYMax;
		}

		public void setColor(Color color) {
			this.color = color;
		}

		public int getSourceX() {
			return sourceX;
		}

		public int getSourceYMin() {
			return sourceYMin;
		}

		public int getSourceYMax() {
			return sourceYMax;
		}

		public Color getColor() {
			return color;
		}

		public int getX(Component target) {
			if (sourceX < 0)
				return -1;
			return SwingUtilities.convertPoint(source, sourceX, 0, target).x;
		}

		public int getYMin(Component target) {
			if (sourceYMin < 0)
				return -1;
			return SwingUtilities.convertPoint(source, 0, sourceYMin, target).y;
		}

		public int getYMax(Component target) {
			if (sourceYMax < 0)
				return -1;
			return SwingUtilities.convertPoint(source, 0, sourceYMax, target).y;
		}

	}

	public static class Label {
		protected Component source;
		protected String text;
		protected int sourceX;
		protected int sourceY;
		protected Color color;

		public Label(Component source) {
			this(source, null, -1, -1);
		}

		public Label(Component source, String text, int sourceX, int sourceY) {
			this(source, text, sourceX, sourceY, Color.RED);
		}

		public Label(Component source, String text, int sourceX, int sourceY, Color color) {
			this.source = source;
			this.text = text;
			this.sourceX = sourceX;
			this.sourceY = sourceY;
			this.color = color;
		}

		public void setText(String text) {
			this.text = text;
		}

		public void setSourceX(int sourceX) {
			this.sourceX = sourceX;
		}

		public void setSourceY(int sourceY) {
			this.sourceY = sourceY;
		}

		public int getSourceX() {
			return sourceX;
		}

		public int getSourceY() {
			return sourceY;
		}

		public String getText() {
			return text;
		}

		public Color getColor() {
			return color;
		}

		public int getX(Component target) {
			if (sourceX < 0)
				return -1;
			return SwingUtilities.convertPoint(source, sourceX, 0, target).x;
		}

		public int getY(Component target) {
			if (sourceY < 0)
				return -1;
			return SwingUtilities.convertPoint(source, 0, sourceY, target).y;
		}

	}
}