Mega Code Archive
Statusbar component
<![CDATA[
/*
* Copyright (C) 2001-2003 Colin Bell
* colbell@users.sourceforge.net
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
import java.awt.*;
import javax.swing.*;
import javax.swing.border.BevelBorder;
import javax.swing.border.Border;
/**
* This is a statusbar component with a text control for messages.
*
* @author <A HREF="mailto:colbell@users.sourceforge.net">Colin Bell</A>
*/
public class StatusBar extends JPanel
{
/**
* Message to display if there is no msg to display. Defaults to a
* blank string.
*/
private String _msgWhenEmpty = " ";
/** Label showing the message in the statusbar. */
private final JLabel _textLbl = new JLabel();
private final JProgressBar _progressBar = new JProgressBar();
private final JPanel _pnlLabelOrProgress = new JPanel();
/** Constraints used to add new controls to this statusbar. */
private final GridBagConstraints _gbc = new GridBagConstraints();
private Font _font;
/**
* Default ctor.
*/
public StatusBar()
{
super(new GridBagLayout());
createGUI();
}
/**
* Set the font for controls in this statusbar.
*
* @param font The font to use.
*
* @throws IllegalArgumentException
* Thrown if <TT>null</TT> <TT>Font</TT> passed.
*/
public synchronized void setFont(Font font)
{
if (font == null)
{
throw new IllegalArgumentException("Font == null");
}
super.setFont(font);
_font = font;
updateSubcomponentsFont(this);
}
/**
* Set the text to display in the message label.
*
* @param text Text to display in the message label.
*/
public synchronized void setText(String text)
{
String myText = null;
if (text != null)
{
myText = text.trim();
}
if (myText != null && myText.length() > 0)
{
_textLbl.setText(myText);
}
else
{
clearText();
}
}
/**
* Returns the text label's current value
* @return
*/
public synchronized String getText() {
return _textLbl.getText();
}
public synchronized void clearText()
{
_textLbl.setText(_msgWhenEmpty);
}
public synchronized void setTextWhenEmpty(String value)
{
final boolean wasEmpty = _textLbl.getText().equals(_msgWhenEmpty);
if (value != null && value.length() > 0)
{
_msgWhenEmpty = value;
}
else
{
_msgWhenEmpty = " ";
}
if (wasEmpty)
{
clearText();
}
}
public synchronized void addJComponent(JComponent comp)
{
if (comp == null)
{
throw new IllegalArgumentException("JComponent == null");
}
comp.setBorder(createComponentBorder());
if (_font != null)
{
comp.setFont(_font);
updateSubcomponentsFont(comp);
}
super.add(comp, _gbc);
}
public static Border createComponentBorder()
{
return BorderFactory.createCompoundBorder(
BorderFactory.createBevelBorder(BevelBorder.LOWERED),
BorderFactory.createEmptyBorder(0, 4, 0, 4));
}
private void createGUI()
{
clearText();
Dimension progSize = _progressBar.getPreferredSize();
progSize.height = _textLbl.getPreferredSize().height;
_progressBar.setPreferredSize(progSize);
_progressBar.setStringPainted(true);
_pnlLabelOrProgress.setLayout(new GridLayout(1,1));
_pnlLabelOrProgress.add(_textLbl);
// The message area is on the right of the statusbar and takes
// up all available space.
_gbc.anchor = GridBagConstraints.WEST;
_gbc.weightx = 1.0;
_gbc.fill = GridBagConstraints.HORIZONTAL;
_gbc.gridy = 0;
_gbc.gridx = 0;
addJComponent(_pnlLabelOrProgress);
// Any other components are on the right.
_gbc.weightx = 0.0;
_gbc.anchor = GridBagConstraints.CENTER;
_gbc.gridx = GridBagConstraints.RELATIVE;
}
private void updateSubcomponentsFont(Container cont)
{
Component[] comps = cont.getComponents();
for (int i = 0; i < comps.length; ++i)
{
comps[i].setFont(_font);
if (comps[i] instanceof Container)
{
updateSubcomponentsFont((Container)comps[i]);
}
}
}
public void setStatusBarProgress(String msg, int minimum, int maximum, int value)
{
if(false == _pnlLabelOrProgress.getComponent(0) instanceof JProgressBar)
{
_pnlLabelOrProgress.remove(0);
_pnlLabelOrProgress.add(_progressBar);
validate();
}
_progressBar.setMinimum(minimum);
_progressBar.setMaximum(maximum);
_progressBar.setValue(value);
if(null != msg)
{
_progressBar.setString(msg);
}
else
{
_progressBar.setString("");
}
}
public void setStatusBarProgressFinished()
{
if(_pnlLabelOrProgress.getComponent(0) instanceof JProgressBar)
{
_pnlLabelOrProgress.remove(0);
_pnlLabelOrProgress.add(_textLbl);
validate();
repaint();
}
}
}
]]>