+++ /dev/null
-/*
- * Copyright © 2010 Anthony Towns <aj@erisian.com.au>
- *
- * 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 2 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, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- */
-
-package org.altusmetrum.altosuilib_12;
-
-import java.awt.*;
-import java.awt.event.*;
-import javax.swing.*;
-import javax.swing.event.MouseInputAdapter;
-
-class GrabNDrag extends MouseInputAdapter {
- private JComponent scroll;
- private Point startPt = new Point();
-
- public GrabNDrag(JComponent scroll) {
- this.scroll = scroll;
- scroll.addMouseMotionListener(this);
- scroll.addMouseListener(this);
- scroll.setAutoscrolls(true);
- }
-
- public static boolean grab_n_drag(MouseEvent e) {
- return e.getModifiers() == InputEvent.BUTTON1_MASK;
- }
-
- public void mousePressed(MouseEvent e) {
- if (grab_n_drag(e))
- startPt.setLocation(e.getPoint());
- }
- public void mouseDragged(MouseEvent e) {
- if (grab_n_drag(e)) {
- int xd = e.getX() - startPt.x;
- int yd = e.getY() - startPt.y;
-
- Rectangle r = scroll.getVisibleRect();
- r.x -= xd;
- r.y -= yd;
- scroll.scrollRectToVisible(r);
- }
- }
-}