/*
 * Copyright (c) 2007-2010 by The Broad Institute, Inc. and the Massachusetts Institute of Technology.
 * All Rights Reserved.
 *
 * This software is licensed under the terms of the GNU Lesser General Public License (LGPL), Version 2.1 which
 * is available at http://www.opensource.org/licenses/lgpl-2.1.php.
 *
 * THE SOFTWARE IS PROVIDED "AS IS." THE BROAD AND MIT MAKE NO REPRESENTATIONS OR WARRANTIES OF
 * ANY KIND CONCERNING THE SOFTWARE, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT, OR THE ABSENCE OF LATENT
 * OR OTHER DEFECTS, WHETHER OR NOT DISCOVERABLE.  IN NO EVENT SHALL THE BROAD OR MIT, OR THEIR
 * RESPECTIVE TRUSTEES, DIRECTORS, OFFICERS, EMPLOYEES, AND AFFILIATES BE LIABLE FOR ANY DAMAGES OF
 * ANY KIND, INCLUDING, WITHOUT LIMITATION, INCIDENTAL OR CONSEQUENTIAL DAMAGES, ECONOMIC
 * DAMAGES OR INJURY TO PROPERTY AND LOST PROFITS, REGARDLESS OF WHETHER THE BROAD OR MIT SHALL
 * BE ADVISED, SHALL HAVE OTHER REASON TO KNOW, OR IN FACT SHALL KNOW OF THE POSSIBILITY OF THE
 * FOREGOING.
 */


/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package org.broad.igv.ui.legend;

//~--- non-JDK imports --------------------------------------------------------

import org.apache.log4j.Logger;
import org.broad.igv.PreferenceManager;
import org.broad.igv.renderer.ContinuousColorScale;
import org.broad.igv.track.TrackType;
import org.broad.igv.ui.FontManager;
import org.broad.igv.ui.IGVMainFrame;
import org.broad.igv.ui.util.UIUtilities;

import javax.swing.*;
import java.awt.*;
import java.text.DecimalFormat;

/**
 * @author eflakes
 */
public class HeatmapLegendPanel extends LegendPanel {

    static Logger log = Logger.getLogger(HeatmapLegendPanel.class);

    private TrackType type;
    protected ContinuousColorScale colorScale;

    /**
     * Constructs ...
     *
     * @param type
     */
    public HeatmapLegendPanel(TrackType type) {
        this.type = type;

        // TODO -- temporary hack.  We need some specific knowledge fo the implementation
        // in order to edit it,  but do it without a cast
        this.colorScale = (ContinuousColorScale) PreferenceManager.getInstance().getColorScale(type);
    }

    protected void persistResetPreferences() {
        PreferenceManager.getInstance().setColorScale(type, colorScale);
    }

    protected void resetPreferencesToDefault() {
        // TODO -- temporary hack.  We need some specific knowledge fo the implementation
        // in order to edit it,  but do it without a cast
        colorScale = (ContinuousColorScale) PreferenceManager.getInstance().getDefaultColorScale(type);
        persistResetPreferences();
        showResetDisplay();
    }

    protected void reloadPreferences() {
        PreferenceManager.getInstance().setColorScale(type, colorScale);
        //ColorScaleFactory.clearCache();
        repaint();
    }

    /**
     * Method description
     */
    public void doUserPreferences() {

        UIUtilities.invokeOnEventThread(new Runnable() {

            public void run() {

                IGVMainFrame.getInstance().setStatusBarMessage("Setting view properties...");

                HeatmapLegendEditor dialog = new HeatmapLegendEditor(IGVMainFrame.getInstance(),
                        true, type, colorScale);

                dialog.setTitle("HeatMap Preferences");
                dialog.setVisible(true);


                if (dialog.isCanceled()) {
                    IGVMainFrame.getInstance().resetStatusMessage();
                    return;
                }
                // TODO -- temporary hack.  We need some specific knowledge fo the implementation
                // in order to edit it,  but do it without a cast

                colorScale = dialog.getColorScheme();
                PreferenceManager.getInstance().setColorScale(type, colorScale);
                IGVMainFrame.getInstance().repaintDataPanels();
                try {

                    reloadPreferences();

                }
                finally {

                    UIUtilities.invokeOnEventThread(new Runnable() {

                        public void run() {
                            SwingUtilities.getWindowAncestor(HeatmapLegendPanel.this).toFront();
                        }
                    });
                    IGVMainFrame.getInstance().resetStatusMessage();
                }
            }
        });
    }

    protected void paintLegend(Graphics g) {

        DecimalFormat formatter = new DecimalFormat("0.0");

        Graphics2D g2D = null;

        try {
            g2D = (Graphics2D) g.create();

            g2D.setFont(FontManager.getScalableFont(10));

            int npts = 5;
            double max = colorScale.getMaximum();
            double min = colorScale.getMinimum();

            int w = getWidth() - 20;
            double dx = ((double) w) / npts;
            double dxj = dx / 10;
            double delta = (max - min) / npts;
            double deltaj = delta / 10;

            for (int i = 0; i < npts + 1; i++) {
                for (int j = i * 10; j < i * 10 + 10; j++) {
                    double val = min + j * deltaj;

                    Color c = colorScale.getColor((float) val);

                    g2D.setColor(c);

                    int x0 = (int) (j * dxj);
                    int x1 = (int) ((j + 1) * dxj);

                    g2D.fillRect(x0, 0, (x1 - x0), (int) (getHeight() / 2));
                }

                double labelVal = min + i * delta;
                int x0 = (int) (i * dx);

                g2D.setColor(Color.BLACK);
                g2D.drawString(formatter.format(labelVal), x0, (int) getHeight() - 5);
            }


        }
        finally {
            g2D.dispose();
        }
    }
}
