/
MainPanel.java
91 lines (80 loc) · 2.99 KB
/
MainPanel.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@
package example;
import java.awt.*;
import javax.swing.*;
import javax.swing.plaf.basic.ComboPopup;
public final class MainPanel extends JPanel {
private MainPanel() {
super(new BorderLayout());
UIManager.put("ComboBox.selectionBackground", Color.PINK);
UIManager.put("ComboBox.selectionForeground", Color.CYAN);
String[] model = {"111", "2222", "33333"};
JComboBox<String> combo0 = new JComboBox<>(model);
JComboBox<String> combo1 = new JComboBox<String>(model) {
@Override public void updateUI() {
super.updateUI();
Object o = getAccessibleContext().getAccessibleChild(0);
if (o instanceof ComboPopup) {
JList<?> list = ((ComboPopup) o).getList();
list.setSelectionForeground(Color.WHITE);
list.setSelectionBackground(Color.ORANGE);
}
}
};
JComboBox<String> combo2 = new JComboBox<String>(model) {
@Override public void updateUI() {
setRenderer(null);
super.updateUI();
ListCellRenderer<? super String> renderer = getRenderer();
setRenderer((list, value, index, isSelected, cellHasFocus) -> {
Component c = renderer.getListCellRendererComponent(
list, value, index, isSelected, cellHasFocus);
if (isSelected) {
c.setForeground(Color.WHITE);
c.setBackground(Color.ORANGE);
} else {
c.setForeground(Color.BLACK);
c.setBackground(Color.WHITE);
}
return c;
});
}
};
Box box = Box.createVerticalBox();
box.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
box.add(makeTitledPanel("UIManager.put(ComboBox.selection*ground, ...)", combo0));
box.add(Box.createVerticalStrut(5));
box.add(makeTitledPanel("ComboPopup.getList().setSelection*ground(...)", combo1));
box.add(Box.createVerticalStrut(5));
box.add(makeTitledPanel("ListCellRenderer", combo2));
add(box, BorderLayout.NORTH);
setPreferredSize(new Dimension(320, 240));
}
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);
}
}