-
Notifications
You must be signed in to change notification settings - Fork 156
/
MainPanel.java
138 lines (123 loc) · 4.75 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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@
package example;
import java.awt.*;
import java.util.Collections;
import java.util.Enumeration;
import java.util.stream.Stream;
import javax.swing.*;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
public final class MainPanel extends JPanel {
private MainPanel() {
super(new BorderLayout());
JTree tree = new JTree();
// tree.setModel(makeModel());
JButton button1 = new JButton("expand A");
button1.addActionListener(e -> expandAll(tree));
JButton button2 = new JButton("collapse A");
button2.addActionListener(e -> collapseAll(tree));
JButton button3 = new JButton("expand B");
button3.addActionListener(e -> {
TreeNode root = (TreeNode) tree.getModel().getRoot();
visitAll(tree, new TreePath(root), true);
// expandAPath(new TreePath(root));
});
JButton button4 = new JButton("collapse B");
button4.addActionListener(e -> {
TreeNode root = (TreeNode) tree.getModel().getRoot();
visitAll(tree, new TreePath(root), false);
});
JPanel p = new JPanel(new GridLayout(0, 1, 2, 2));
Stream.of(button1, button2, button3, button4).forEach(p::add);
JPanel panel = new JPanel(new BorderLayout());
panel.add(p, BorderLayout.NORTH);
add(panel, BorderLayout.EAST);
add(new JScrollPane(tree));
setPreferredSize(new Dimension(320, 240));
}
// private static DefaultTreeModel makeModel() {
// DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
// DefaultMutableTreeNode set1 = new DefaultMutableTreeNode("Set 001");
// DefaultMutableTreeNode set2 = new DefaultMutableTreeNode("Set 002");
// DefaultMutableTreeNode set3 = new DefaultMutableTreeNode("Set 003");
// set1.add(new DefaultMutableTreeNode("111111111"));
// set1.add(new DefaultMutableTreeNode("22222222222"));
// set1.add(new DefaultMutableTreeNode("33333"));
// set2.add(new DefaultMutableTreeNode("44444444444"));
// set2.add(new DefaultMutableTreeNode("5555"));
// set3.add(new DefaultMutableTreeNode("6666666666"));
// set3.add(new DefaultMutableTreeNode("7777777"));
// set3.add(new DefaultMutableTreeNode("88888888888888"));
// root.add(set1);
// root.add(set2);
// set2.add(set3);
// return new DefaultTreeModel(root);
// }
// Expanding or Collapsing All Nodes in a JTree Component (Java Developers Almanac Example)
// http://www.exampledepot.com/egs/javax.swing.tree/ExpandAll.html
public static void visitAll(JTree tree, TreePath parent, boolean expand) {
TreeNode node = (TreeNode) parent.getLastPathComponent();
// Java 9: Collections.list(node.children()).stream()
Collections.list((Enumeration<?>) node.children()).stream()
.filter(TreeNode.class::isInstance)
.map(TreeNode.class::cast)
.forEach(n -> visitAll(tree, parent.pathByAddingChild(n), expand));
// if (!node.isLeaf()) {
// // Java 9: Enumeration<TreeNode> e = node.children();
// Enumeration<?> e = node.children();
// while (e.hasMoreElements()) {
// visitAll(tree, parent.pathByAddingChild(e.nextElement()), expand);
// }
// }
if (expand) {
tree.expandPath(parent);
} else {
tree.collapsePath(parent);
}
}
// Expand or collapse a JTree - Real's Java How-to
// https://www.rgagnon.com/javadetails/java-0210.html
public static void expandAll(JTree tree) {
int row = 0;
while (row < tree.getRowCount()) {
tree.expandRow(row);
row++;
}
}
public static void collapseAll(JTree tree) {
int row = tree.getRowCount() - 1;
while (row >= 0) {
tree.collapseRow(row);
row--;
}
}
// // https://community.oracle.com/thread/1393385 How to Expand a JTree completely
// private void expandAPath(TreePath p) {
// tree.expandPath(p);
// DefaultMutableTreeNode n = (DefaultMutableTreeNode) p.getLastPathComponent();
// for (int i = 0; i < n.getChildCount(); i++) {
// expandAPath(p.pathByAddingChild(n.getChildAt(i)));
// }
// }
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);
}
}