+++ /dev/null
-/*
- * Copyright (c) 2009, Takeyuki Nagao
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the
- * following conditions are met:
- *
- * * Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the
- * following disclaimer.
- * * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the
- * following disclaimer in the documentation and/or other
- * materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
- * OF SUCH DAMAGE.
- */
-
-package jp.sourceforge.dvibrowser.dvicore.gui.swing;
-
-import java.awt.Component;
-import java.awt.Container;
-import java.awt.Cursor;
-import java.awt.Point;
-import java.awt.Rectangle;
-import java.awt.event.MouseEvent;
-
-import javax.swing.JScrollBar;
-import javax.swing.JScrollPane;
-import javax.swing.JViewport;
-import javax.swing.SwingUtilities;
-import javax.swing.event.MouseInputAdapter;
-
-// TODO: support logging
-public class DragToScroll
-extends MouseInputAdapter
-{
- // Should we make them weak-references?
- private final JScrollPane jsp;
- private final JScrollBar hsb, vsb;
- // TODO: Handle property change by sp.setXXXScrollBar().
-
- public DragToScroll(JScrollPane jsp) {
- this.jsp = jsp;
- hsb = jsp.getHorizontalScrollBar();
- vsb = jsp.getVerticalScrollBar();
- }
-
- public JScrollPane scrollPane() { return jsp; }
-
- public void add(Component c) {
- if (c == null) return;
- addComponent(c);
- if (c instanceof Container) {
- Component [] cs = ((Container) c).getComponents();
- for (int i=0; i<cs.length; i++) {
- add(cs[i]);
- }
- }
- }
-
- private void addComponent(Component c) {
- c.addMouseMotionListener(this);
- c.addMouseListener(this);
- }
-
- public void remove(Component c) {
- if (c == null) return;
- if (c instanceof Container) {
- Component [] cs = ((Container) c).getComponents();
- for (int i=0; i<cs.length; i++) {
- remove(cs[i]);
- }
- }
- removeComponent(c);
- }
-
- private void removeComponent(Component c) {
- if (c == null) return;
- c.removeMouseMotionListener(this);
- c.removeMouseListener(this);
- }
-
- public void mouseClicked(MouseEvent e)
- {
- debug("mouseClicked");
- }
-
- public void mouseEntered(MouseEvent e)
- {
- debug("mouseEntered");
- }
- public void mouseExited(MouseEvent e)
- {
- debug("mouseExited");
- }
- private int saveX, saveY;
- private void savePoint(int x, int y) {
- saveX = x;
- saveY = y;
- }
-
- public void mousePressed(MouseEvent e)
- {
- debug("mousePressed");
- Cursor cursor = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
- Component c = (Component) e.getSource();
- c.setCursor(cursor);
-
- if (!e.isPopupTrigger()) {
- Point p = e.getPoint();
- SwingUtilities.convertPointToScreen(p, e.getComponent());
- savePoint(p.x, p.y);
- }
- }
- public void mouseReleased(MouseEvent e)
- {
- debug("mouseReleased");
- Component c = (Component) e.getSource();
- c.setCursor(null);
- }
-
- public void mouseDragged(MouseEvent e)
- {
- if (!e.isPopupTrigger()) {
- Component c = e.getComponent();
- debug(e.getSource() + ": mouseDragged");
- Point p = e.getPoint();
- SwingUtilities.convertPointToScreen(p, c);
- int dx = p.x - saveX;
- int dy = p.y - saveY;
-
- debug("(dx,dy)=(" + dx + "," + dy + ")");
-
- savePoint(p.x, p.y);
-
- if (dy == 0) {
- hsb.setValue(hsb.getValue() - dx);
- } else if (dx == 0) {
- vsb.setValue(vsb.getValue() - dy);
- } else {
- JViewport jv = jsp.getViewport();
- jv.scrollRectToVisible(
- new Rectangle(-dx, -dy, jv.getWidth(), jv.getHeight())
- );
- }
- }
- }
-
- public void mouseMoved(MouseEvent e)
- {
- debug("mouseMoved");
- }
-
- private static void debug(String str) {
-// System.out.println(str);
- }
-}
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