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MainPanel.java
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MainPanel.java
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// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@
package example;
import java.awt.*;
import java.awt.event.MouseEvent;
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
public final class MainPanel extends JPanel {
private MainPanel() {
super(new GridLayout(1, 2, 5, 5));
JPanel panel1 = new JPanel() {
private final JLabel label = new JLabel();
@Override public String getToolTipText(MouseEvent e) {
Border b = getBorder();
return b instanceof TitledBorder ? getString(e, (TitledBorder) b) : null;
}
private String getString(MouseEvent e, TitledBorder titledBorder) {
// int edge = 2; // EDGE_SPACING;
Insets i = titledBorder.getBorderInsets(this);
String title = titledBorder.getTitle();
label.setFont(titledBorder.getTitleFont());
label.setText(title);
Dimension size = label.getPreferredSize();
int labelX = i.left;
int labelY = 0;
int labelW = getSize().width - i.left - i.right;
int labelH = i.top;
String tipText = null;
if (size.width > labelW) {
Rectangle r = new Rectangle(labelX, labelY, labelW, labelH);
tipText = r.contains(e.getPoint()) ? title : null;
}
return tipText;
}
};
panel1.setBorder(BorderFactory.createTitledBorder("Override JPanel#getToolTipText(...)"));
panel1.setToolTipText("JPanel: ToolTipText");
JPanel panel2 = new JPanel();
panel2.setBorder(BorderFactory.createTitledBorder("Default TitledBorder on JPanel"));
panel2.setToolTipText("JPanel");
setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
add(panel1);
add(panel2);
setPreferredSize(new Dimension(320, 240));
}
public static void main(String[] args) {
EventQueue.invokeLater(MainPanel::createAndShowGui);
}
private static void createAndShowGui() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (UnsupportedLookAndFeelException ignored) {
Toolkit.getDefaultToolkit().beep();
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException ex) {
ex.printStackTrace();
return;
}
JFrame frame = new JFrame("@title@");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.getContentPane().add(new MainPanel());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}