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
|
/*
@ITMillApache2LicenseForJavaFiles@
*/
package com.itmill.toolkit.tests.book;
import com.itmill.toolkit.event.Action;
import com.itmill.toolkit.event.ShortcutAction;
import com.itmill.toolkit.event.Action.Handler;
import com.itmill.toolkit.ui.Button;
import com.itmill.toolkit.ui.CustomComponent;
import com.itmill.toolkit.ui.FormLayout;
import com.itmill.toolkit.ui.HorizontalLayout;
import com.itmill.toolkit.ui.Label;
import com.itmill.toolkit.ui.Panel;
import com.itmill.toolkit.ui.TextField;
public class DefaultButtonExample extends CustomComponent implements Handler {
// Define and create user interface components
Panel panel = new Panel("Login");
FormLayout formlayout = new FormLayout();
TextField username = new TextField("Username");
TextField password = new TextField("Password");
HorizontalLayout buttons = new HorizontalLayout();
// Create buttons and define their listener methods.
Button ok = new Button("OK", this, "okHandler");
Button cancel = new Button("Cancel", this, "cancelHandler");
// Have the unmodified Enter key cause an event
Action action_ok = new ShortcutAction("Default key",
ShortcutAction.KeyCode.ENTER, null);
// Have the C key modified with Alt cause an event
Action action_cancel = new ShortcutAction("Alt+C",
ShortcutAction.KeyCode.C,
new int[] { ShortcutAction.ModifierKey.ALT });
public DefaultButtonExample() {
// Set up the user interface
setCompositionRoot(panel);
panel.addComponent(formlayout);
formlayout.addComponent(username);
formlayout.addComponent(password);
formlayout.addComponent(buttons);
buttons.addComponent(ok);
buttons.addComponent(cancel);
// Set focus to username
username.focus();
// Set this object as the action handler
System.out.println("adding ah");
panel.addActionHandler(this);
System.out.println("start done.");
}
/**
* Retrieve actions for a specific component. This method will be called for
* each object that has a handler; in this example just for login panel. The
* returned action list might as well be static list.
*/
public Action[] getActions(Object target, Object sender) {
System.out.println("getActions()");
return new Action[] { action_ok, action_cancel };
}
/**
* Handle actions received from keyboard. This simply directs the actions to
* the same listener methods that are called with ButtonClick events.
*/
public void handleAction(Action action, Object sender, Object target) {
if (action == action_ok) {
okHandler();
}
if (action == action_cancel) {
cancelHandler();
}
}
public void okHandler() {
// Do something: report the click
formlayout.addComponent(new Label("OK clicked. " + "User="
+ username.getValue() + ", password=" + password.getValue()));
//
}
public void cancelHandler() {
// Do something: report the click
formlayout.addComponent(new Label("Cancel clicked. User="
+ username.getValue() + ", password=" + password.getValue()));
}
}
|
