/* TagBlockSignalTool.java created 2007-10-13
 *
 */

package org.signalml.app.view.signal;

import java.awt.Cursor;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.MouseEvent;

import javax.swing.SwingUtilities;

import org.apache.log4j.Logger;
import org.signalml.app.document.TagDocument;
import org.signalml.app.util.IconUtils;
import org.signalml.plugin.export.signal.SignalSelectionType;
import org.signalml.plugin.export.signal.TagStyle;

/** TagBlockSignalTool
 *
 *
 * @author Michal Dobaczewski © 2007-2008 CC Otwarte Systemy Komputerowe Sp. z o.o.
 */
public class TagBlockSignalTool extends AbstractSignalTool implements TaggingSignalTool {

	protected static final Logger logger = Logger.getLogger(TagBlockSignalTool.class);

	private Integer startBlock;
	private SignalPlot plot;

	public TagBlockSignalTool(SignalView signalView) {
		super(signalView);
	}

	@Override
	public Cursor getDefaultCursor() {
		return IconUtils.getCrosshairCursor();
	}


	@Override
	public SignalSelectionType getTagType() {
		return SignalSelectionType.BLOCK;
	}

	@Override
	public void mousePressed(MouseEvent e) {

		if (SwingUtilities.isLeftMouseButton(e)) {

			Object source = e.getSource();
			if (!(source instanceof SignalPlot)) {
				plot = null;
				return;
			}
			plot = (SignalPlot) source;

			startBlock = plot.toBlockSpace(e.getPoint());
			setEngaged(true);
			e.consume();

		}

	}

	@Override
	public void mouseReleased(MouseEvent e) {
		if (SwingUtilities.isLeftMouseButton(e)) {
			tagTo(e.getPoint());
			startBlock = null;
			setEngaged(false);
			plot = null;
			e.consume();
		}
	}

	@Override
	public void mouseDragged(MouseEvent e) {
		if (SwingUtilities.isLeftMouseButton(e)) {
			Point point = e.getPoint();
			selectTo(point);
			Rectangle r = new Rectangle(point.x, point.y, 1, 1);
			((SignalPlot)e.getSource()).scrollRectToVisible(r);
		}
	}

	private void selectTo(Point point) {
		if (startBlock != null) {
			Integer endBlock = plot.toBlockSpace(point);
			if (endBlock != null) {
				getSignalView().setSignalSelection(plot,plot.getBlockSelection(startBlock, endBlock));
			}
		}
	}

	private void tagTo(Point point) {
		if (startBlock != null) {
			Integer endBlock = plot.toBlockSpace(point);
			if (endBlock != null) {

				TagStyle style = getSignalView().getCurrentTagStyle(SignalSelectionType.BLOCK);
				TagDocument tagDocument = getSignalView().getDocument().getActiveTag();
				if (tagDocument != null) {

					if (style == null) {
						plot.eraseTagsFromSelection(tagDocument, plot.getBlockSelection(startBlock, endBlock));
					} else {
						plot.tagBlockSelection(tagDocument, style, plot.getBlockSelection(startBlock, endBlock), true);
					}

				}

			}

			getSignalView().clearSignalSelection();
		}
	}

}