Updates pull request from Roman Tsypuk to convert the build system from

ant to gradle.  Removes linux and windows application launch scripts and
produces an executable jar with all resources included.

src/main/java/io/github/dsheirer/map/SelectionAdapter.java

@@ -0,0 +1,103 @@
+/*******************************************************************************
+ *     SDR Trunk 
+ *     Copyright (C) 2014 Dennis Sheirer
+ * 
+ *     This program 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.
+ * 
+ *     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 General Public License for more details.
+ * 
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>
+ ******************************************************************************/
+package io.github.dsheirer.map;
+
+import org.jdesktop.swingx.JXMapViewer;
+
+import java.awt.*;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.geom.Point2D;
+
+/**
+ * Creates a selection rectangle based on mouse input
+ * Also triggers repaint events in the viewer
+ * @author Martin Steiger
+ */
+public class SelectionAdapter extends MouseAdapter 
+{
+	private boolean dragging;
+	private JXMapViewer viewer;
+
+	private Point2D startPos = new Point2D.Double();
+	private Point2D endPos = new Point2D.Double();
+
+	/**
+	 * @param viewer the jxmapviewer
+	 */
+	public SelectionAdapter(JXMapViewer viewer)
+	{
+		this.viewer = viewer;
+	}
+
+	@Override
+	public void mousePressed(MouseEvent e)
+	{
+		if (e.getButton() != MouseEvent.BUTTON3)
+			return;
+		
+		startPos.setLocation(e.getX(), e.getY());
+		endPos.setLocation(e.getX(), e.getY());
+		
+		dragging = true;
+	}
+
+	@Override
+	public void mouseDragged(MouseEvent e)
+	{
+		if (!dragging)
+			return;
+		
+		endPos.setLocation(e.getX(), e.getY());
+		
+		viewer.repaint();
+	}
+
+	@Override
+	public void mouseReleased(MouseEvent e)
+	{
+		if (!dragging)
+			return;
+		
+		if (e.getButton() != MouseEvent.BUTTON3)
+			return;
+		
+		viewer.repaint();
+		
+		dragging = false;
+	}
+
+	/**
+	 * @return the selection rectangle
+	 */
+	public Rectangle getRectangle()
+	{
+		if (dragging)
+		{
+			int x1 = (int) Math.min(startPos.getX(), endPos.getX());
+			int y1 = (int) Math.min(startPos.getY(), endPos.getY());
+			int x2 = (int) Math.max(startPos.getX(), endPos.getX());
+			int y2 = (int) Math.max(startPos.getY(), endPos.getY());
+			
+			return new Rectangle(x1, y1, x2-x1, y2-y1);
+		}
+		
+		return null;
+	}
+
+}