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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.util.Map;
import javax.swing.*;
public final class MainPanel extends JPanel {
private MainPanel() {
super(new BorderLayout(5, 5));
Box box = Box.createVerticalBox();
box.add(Box.createVerticalStrut(5));
box.add(makeTitledPanel("Default", makeSlider(false)));
box.add(Box.createVerticalStrut(5));
box.add(makeTitledPanel("Triangle Tick", makeSlider(true)));
box.add(Box.createVerticalGlue());
add(box);
setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
setPreferredSize(new Dimension(320, 240));
}
private JSlider makeSlider(boolean icon) {
JSlider slider = new JSlider(0, 100);
slider.setMajorTickSpacing(10);
slider.setMinorTickSpacing(5);
slider.setPaintLabels(true);
slider.setSnapToTicks(true);
slider.putClientProperty("Slider.paintThumbArrowShape", Boolean.TRUE);
Object labelTable = slider.getLabelTable();
if (icon && labelTable instanceof Map) {
Icon tick = new TickIcon();
((Map<?, ?>) labelTable).values().stream()
.filter(JLabel.class::isInstance)
.map(JLabel.class::cast)
.forEach(label -> {
label.setBorder(BorderFactory.createEmptyBorder(1, 0, 0, 0));
label.setIcon(tick);
label.setIconTextGap(0);
label.setVerticalAlignment(SwingConstants.TOP);
label.setVerticalTextPosition(SwingConstants.BOTTOM);
label.setHorizontalAlignment(SwingConstants.CENTER);
label.setHorizontalTextPosition(SwingConstants.CENTER);
label.setForeground(Color.RED);
});
} else {
slider.setPaintTicks(true);
slider.setForeground(Color.BLUE);
}
return slider;
}
private static Component makeTitledPanel(String title, Component c) {
JPanel p = new JPanel(new BorderLayout());
p.setBorder(BorderFactory.createTitledBorder(title));
p.add(c);
return p;
}
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);
}
}
class TickIcon implements Icon {
@Override public void paintIcon(Component c, Graphics g, int x, int y) {
Graphics2D g2 = (Graphics2D) g.create();
g2.translate(x, y);
g2.setColor(Color.BLUE);
g2.drawLine(2, 0, 2, 2);
g2.drawLine(1, 1, 3, 1);
g2.drawLine(0, 2, 4, 2);
g2.dispose();
}
@Override public int getIconWidth() {
return 5;
}
@Override public int getIconHeight() {
return 3;
}
}