Three FormLayout component sizes: minimum, default and
preferred
/*
* Copyright (c) 2002-2004 JGoodies Karsten Lentzsch. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* o 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.
*
* o Neither the name of JGoodies Karsten Lentzsch nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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import java.awt.Insets;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import com.jgoodies.forms.builder.DefaultFormBuilder;
import com.jgoodies.forms.builder.PanelBuilder;
import com.jgoodies.forms.layout.CellConstraints;
import com.jgoodies.forms.layout.FormLayout;
/**
* Demonstrates the three FormLayout component sizes: minimum, default and
* preferred.
* Min and Pref measure the components minimum and preferred size, where the
* Default size behaves like Pref but shrinks if the container space is scarce.
*
* @author Karsten Lentzsch
* @version $Revision: 1.8 $
*/
public class ComponentSizesExample {
public static void main(String[] args) {
try {
UIManager.setLookAndFeel("com.jgoodies.plaf.plastic.PlasticXPLookAndFeel");
} catch (Exception e) {
// Likely PlasticXP is not in the class path; ignore.
}
JFrame frame = new JFrame();
frame.setTitle("Forms Tutorial :: Component Sizes");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
JComponent panel = new ComponentSizesExample().buildPanel();
frame.getContentPane().add(panel);
frame.pack();
frame.setVisible(true);
}
public JComponent buildPanel() {
JSplitPane splitPane = new JSplitPane(
JSplitPane.HORIZONTAL_SPLIT,
true,
buildCombinedPanel(),
buildTextPanel());
return splitPane;
}
/**
* Builds and answer the panel that combines the three sizing panels.
*
* @return the combined panel
*/
private JComponent buildCombinedPanel() {
FormLayout layout = new FormLayout(
"30dlu:grow",
"pref, 3dlu, pref, 3dlu, pref");
PanelBuilder builder = new PanelBuilder(layout);
builder.setDefaultDialogBorder();
CellConstraints cc = new CellConstraints();
builder.add(buildMinimumSizePanel(), cc.xy(1, 1));
builder.add(buildDefaultSizePanel(), cc.xy(1, 3));
builder.add(buildPreferredSizePanel(), cc.xy(1, 5));
return builder.getPanel();
}
private JComponent buildMinimumSizePanel() {
FormLayout layout = new FormLayout(
"right:max(25dlu;pref), 3dlu, min",
"pref");
DefaultFormBuilder builder = new DefaultFormBuilder(layout);
builder.append("Min", new JTextField(15));
return builder.getPanel();
}
private JComponent buildDefaultSizePanel() {
FormLayout layout = new FormLayout(
"right:max(25dlu;pref), 3dlu, default",
"pref");
DefaultFormBuilder builder = new DefaultFormBuilder(layout);
builder.append("Default", new JTextField(15));
return builder.getPanel();
}
private JComponent buildPreferredSizePanel() {
FormLayout layout = new FormLayout(
"right:max(25dlu;pref), 3dlu, pref",
"pref");
DefaultFormBuilder builder = new DefaultFormBuilder(layout);
builder.append("Pref", new JTextField(15));
return builder.getPanel();
}
private JComponent buildTextPanel() {
JTextArea textArea = new JTextArea(5, 20);
textArea.setEditable(false);
textArea.setMargin(new Insets(6, 10, 4, 6));
textArea.setText("The text field used in the example on the left\n" +
"has a narrow minimum width and a wider preferred width.\n\n" +
"If you move the split divider to the left and right\n" +
"you can see how 'Default' shrinks the field if space is scarce.\n\n" +
"If there's not enough space for the preferred width\n" +
"the bottom field will be 'cut' on the right-hand side.");
JScrollPane scrollpane = new JScrollPane(textArea);
scrollpane.setBorder(new EmptyBorder(0, 0, 0, 0));
return scrollpane;
}
}
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