/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2007-2015 Broad Institute
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package org.broad.igv.ui.dnd;

import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;

public class GhostGlassPane extends JPanel {
    private AlphaComposite composite;
    private BufferedImage dragged = null;
    private Point location = new Point(0, 0);

    public GhostGlassPane() {
        setOpaque(false);
        composite = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f);
    }

    public void setImage(BufferedImage dragged) {
        this.dragged = dragged;
    }

    public void setPoint(Point location) {
        this.location = location;
    }

    public void paintComponent(Graphics g) {
        if (dragged == null)
            return;

        Graphics2D g2 = (Graphics2D) g;
        g2.setComposite(composite);
        g2.drawImage(dragged,
                (int) (location.getX() - (dragged.getWidth(this) / 2)),
                (int) (location.getY() - (dragged.getHeight(this) / 2)),
                null);
    }
}