From 66ebd954d9c9a44a8db0ee713c682e39306fabd8 Mon Sep 17 00:00:00 2001 From: Anthony Towns Date: Sun, 21 Nov 2010 08:28:24 +1000 Subject: [PATCH] Add GrabNDrag.java --- ao-tools/altosui/GrabNDrag.java | 51 +++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 ao-tools/altosui/GrabNDrag.java diff --git a/ao-tools/altosui/GrabNDrag.java b/ao-tools/altosui/GrabNDrag.java new file mode 100644 index 00000000..b44f3fe2 --- /dev/null +++ b/ao-tools/altosui/GrabNDrag.java @@ -0,0 +1,51 @@ +/* + * Copyright © 2010 Anthony Towns + * + * 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; version 2 of the License. + * + * 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 altosui; + +import java.awt.*; +import java.awt.image.*; +import java.awt.event.*; +import javax.swing.*; +import javax.swing.event.MouseInputAdapter; +import javax.imageio.ImageIO; +import javax.swing.table.*; +import java.io.*; +import java.util.*; +import java.text.*; + +class GrabNDrag extends MouseInputAdapter { + private JComponent scroll; + private Point startPt = new Point(); + + public GrabNDrag(JComponent parent) { + scroll = parent; + } + + public void mousePressed(MouseEvent e) { + startPt.setLocation(e.getPoint()); + } + public void mouseDragged(MouseEvent 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); + } +} -- 2.30.2