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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/examples/gnu/classpath/examples/swing/ScrollBarDemo.java')
-rw-r--r-- | gcc-4.4.3/libjava/classpath/examples/gnu/classpath/examples/swing/ScrollBarDemo.java | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/examples/gnu/classpath/examples/swing/ScrollBarDemo.java b/gcc-4.4.3/libjava/classpath/examples/gnu/classpath/examples/swing/ScrollBarDemo.java new file mode 100644 index 000000000..505991e19 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/examples/gnu/classpath/examples/swing/ScrollBarDemo.java @@ -0,0 +1,174 @@ +/* ScrollBarDemo.java -- An example showing scroll bars in Swing. + Copyright (C) 2005, 2006, Free Software Foundation, Inc. + +This file is part of GNU Classpath examples. + +GNU Classpath 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, or (at your option) +any later version. + +GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. +*/ + + +package gnu.classpath.examples.swing; + +import java.awt.BorderLayout; +import java.awt.GridLayout; +import java.awt.event.ActionEvent; +import java.awt.event.ActionListener; + +import javax.swing.JButton; +import javax.swing.JComponent; +import javax.swing.JFrame; +import javax.swing.JPanel; +import javax.swing.JScrollBar; +import javax.swing.SwingUtilities; + +/** + * A simple scroll bar demo showing various scroll bars in different states. + */ +public class ScrollBarDemo + extends JPanel + implements ActionListener +{ + + /** + * Creates a new demo instance. + */ + public ScrollBarDemo() + { + super(); + createContent(); + } + + /** + * When the demo is run independently, the frame is displayed, so we should + * initialise the content panel (including the demo content and a close + * button). But when the demo is run as part of the Swing activity board, + * only the demo content panel is used, the frame itself is never displayed, + * so we can avoid this step. + */ + void initFrameContent() + { + JPanel closePanel = new JPanel(); + JButton closeButton = new JButton("Close"); + closeButton.setActionCommand("CLOSE"); + closeButton.addActionListener(this); + closePanel.add(closeButton); + add(closePanel, BorderLayout.SOUTH); + } + + /** + * Returns a panel with the demo content. The panel + * uses a BorderLayout(), and the BorderLayout.SOUTH area + * is empty, to allow callers to add controls to the + * bottom of the panel if they want to (a close button is + * added if this demo is being run as a standalone demo). + */ + private void createContent() + { + setLayout(new BorderLayout()); + JPanel panel = createScrollBarPanel(); + add(panel); + } + + private JPanel createScrollBarPanel() + { + JPanel panel = new JPanel(new BorderLayout()); + + JPanel horizontalPanel = new JPanel(); + + JScrollBar scroll1a = new JScrollBar(JScrollBar.HORIZONTAL); + JScrollBar scroll1b = new JScrollBar(JScrollBar.HORIZONTAL); + scroll1b.setEnabled(false); + JScrollBar scroll1c = new JScrollBar(JScrollBar.HORIZONTAL); + scroll1c.putClientProperty("JScrollBar.isFreeStanding", Boolean.FALSE); + JScrollBar scroll1d = new JScrollBar(JScrollBar.HORIZONTAL); + scroll1d.putClientProperty("JScrollBar.isFreeStanding", Boolean.FALSE); + scroll1d.setEnabled(false); + horizontalPanel.add(scroll1a); + horizontalPanel.add(scroll1b); + horizontalPanel.add(scroll1c); + horizontalPanel.add(scroll1d); + + panel.add(horizontalPanel, BorderLayout.NORTH); + + JPanel verticalPanel = new JPanel(); + verticalPanel.setLayout(new GridLayout(1, 7)); + + JScrollBar scroll2a = new JScrollBar(JScrollBar.VERTICAL); + JScrollBar scroll2b = new JScrollBar(JScrollBar.VERTICAL); + scroll2b.setEnabled(false); + JScrollBar scroll2c = new JScrollBar(JScrollBar.VERTICAL); + scroll2c.putClientProperty("JScrollBar.isFreeStanding", Boolean.FALSE); + JScrollBar scroll2d = new JScrollBar(JScrollBar.VERTICAL); + scroll2d.setEnabled(false); + scroll2d.putClientProperty("JScrollBar.isFreeStanding", Boolean.FALSE); + + verticalPanel.add(scroll2a); + verticalPanel.add(new JPanel()); + verticalPanel.add(scroll2b); + verticalPanel.add(new JPanel()); + verticalPanel.add(scroll2c); + verticalPanel.add(new JPanel()); + verticalPanel.add(scroll2d); + + panel.add(verticalPanel, BorderLayout.EAST); + + JPanel centerPanel = new JPanel(new GridLayout(1, 2)); + centerPanel.add(new JScrollBar(JScrollBar.HORIZONTAL)); + centerPanel.add(new JScrollBar(JScrollBar.VERTICAL)); + panel.add(centerPanel); + return panel; + } + + public void actionPerformed(ActionEvent e) + { + if (e.getActionCommand().equals("CLOSE")) + { + System.exit(0); + } + } + + public static void main(String[] args) + { + SwingUtilities.invokeLater + (new Runnable() + { + public void run() + { + ScrollBarDemo app = new ScrollBarDemo(); + app.initFrameContent(); + JFrame frame = new JFrame("ScrollBar Demo"); + frame.getContentPane().add(app); + frame.pack(); + frame.setVisible(true); + }}); + } + + /** + * Returns a DemoFactory that creates a ScrollBarDemo. + * + * @return a DemoFactory that creates a ScrollBarDemo + */ + public static DemoFactory createDemoFactory() + { + return new DemoFactory() + { + public JComponent createDemo() + { + return new ScrollBarDemo(); + } + }; + } +} |