forked from patniemeyer/learningjava
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathPopUpColorMenu.java
More file actions
68 lines (58 loc) · 2.05 KB
/
Copy pathPopUpColorMenu.java
File metadata and controls
68 lines (58 loc) · 2.05 KB
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
//file: PopUpColorMenu.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class PopUpColorMenu implements ActionListener
{
Component selectedComponent;
public PopUpColorMenu() {
JFrame frame = new JFrame("PopUpColorMenu v1.0");
final JPopupMenu colorMenu = new JPopupMenu("Color");
colorMenu.add(makeMenuItem("Red"));
colorMenu.add(makeMenuItem("Green"));
colorMenu.add(makeMenuItem("Blue"));
MouseListener mouseListener = new MouseAdapter() {
public void mousePressed(MouseEvent e) { checkPopup(e); }
public void mouseClicked(MouseEvent e) { checkPopup(e); }
public void mouseReleased(MouseEvent e) { checkPopup(e); }
private void checkPopup(MouseEvent e) {
if (e.isPopupTrigger( )) {
selectedComponent = e.getComponent( );
colorMenu.show(e.getComponent(), e.getX(), e.getY( ));
}
}
};
Container content = frame.getContentPane(); // unecessary in 1.5+
content.setLayout(new FlowLayout( ));
JButton button = new JButton("Uno");
button.addMouseListener(mouseListener);
content.add(button);
button = new JButton("Due");
button.addMouseListener(mouseListener);
content.add(button);
button = new JButton("Tre");
button.addMouseListener(mouseListener);
content.add(button);
frame.getContentPane().addMouseListener(mouseListener);
frame.setSize(200,50);
frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
frame.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
String color = e.getActionCommand( );
if (color.equals("Red"))
selectedComponent.setBackground(Color.red);
else if (color.equals("Green"))
selectedComponent.setBackground(Color.green);
else if (color.equals("Blue"))
selectedComponent.setBackground(Color.blue);
}
private JMenuItem makeMenuItem(String label) {
JMenuItem item = new JMenuItem(label);
item.addActionListener( this );
return item;
}
public static void main(String[] args) {
new PopUpColorMenu();
}
}