01: /*
02: * Copyright (C) 2004 NNL Technology AB
03: * Visit www.infonode.net for information about InfoNode(R)
04: * products and how to contact NNL Technology AB.
05: *
06: * This program is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU General Public License
08: * as published by the Free Software Foundation; either version 2
09: * of the License, or (at your option) any later version.
10: *
11: * This program is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: * GNU General Public License for more details.
15: *
16: * You should have received a copy of the GNU General Public License
17: * along with this program; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
19: * MA 02111-1307, USA.
20: */
21:
22: // $Id: ComponentPaintChecker.java,v 1.4 2005/12/04 13:46:04 jesper Exp $
23: package net.infonode.gui;
24:
25: import javax.swing.*;
26: import java.awt.*;
27: import java.awt.event.HierarchyEvent;
28: import java.awt.event.HierarchyListener;
29:
30: /**
31: * @author johan
32: */
33: public class ComponentPaintChecker {
34: private boolean okToPaint = false;
35:
36: public ComponentPaintChecker(final Component c) {
37: c.addHierarchyListener(new HierarchyListener() {
38: public void hierarchyChanged(HierarchyEvent e) {
39: if ((e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) == HierarchyEvent.SHOWING_CHANGED) {
40: if (c.isDisplayable())
41: SwingUtilities.invokeLater(new Runnable() {
42: public void run() {
43: okToPaint = true;
44: }
45: });
46: else
47: okToPaint = false;
48: }
49: }
50: });
51: }
52:
53: public boolean isPaintingOk() {
54: return okToPaint;
55: }
56: }
|