This example demonstrates how to set MenuItem configuration properties at runtime and listen for the changes through the "configChanged" event.
Note: By default clicking outside of a menu will hide it. Additionally, menu items without a submenu or a URL to navigate to will hide their parent menu when clicked. Click the "Show Menu" button below to make the menu visible if it is hidden.
A MenuItem has a number of configuration
properties that affect its behavior and visual rendering. Any of these
configuration properties can be set at runtime via the
setProperty
method of the item's configuration object
(accessible via its cfg
property.
This example ulitizes the following configuration properties: text, selected, disabled, helptext, url, emphasis, strongemphasis, and checked.
1 | /* |
2 | "configChange" event handler for each MenuItem instance - used |
3 | to log info about the configuration property that was changed. |
4 | */ |
5 | |
6 | function onMenuItemConfigChange(p_sType, p_aArgs) { |
7 | |
8 | var sPropertyName = p_aArgs[0][0], |
9 | sPropertyValue = p_aArgs[0][1]; |
10 | |
11 | YAHOO.log(("Index: " + this.index + ", " + |
12 | "Group Index: " + this.groupIndex + ", " + |
13 | "Custom Event Type: " + p_sType + ", " + |
14 | "\"" + sPropertyName + "\" Property Set To: \"" |
15 | + sPropertyValue + "\""), "info", "example12"); |
16 | |
17 | } |
18 | |
19 | |
20 | /* |
21 | Instantiate a Menu: The first argument passed to the |
22 | constructor is the id of the element in the page |
23 | representing the Menu; the second is an object literal |
24 | of configuration properties. |
25 | */ |
26 | |
27 | var oMenu = new YAHOO.widget.Menu("basicmenu", { fixedcenter: true }); |
28 | |
29 | |
30 | /* |
31 | Subscribe to the Menu instance's "itemAdded" event in order to |
32 | subscribe to the "configChange" event handler of each MenuItem |
33 | instance's configuration object. |
34 | */ |
35 | |
36 | oMenu.subscribe("itemAdded", function (p_sType, p_aArgs) { |
37 | |
38 | var oMenuItem = p_aArgs[0]; |
39 | |
40 | /* |
41 | Subscribe to the "configChange" event handler of each MenuItem |
42 | instance's configuration object. |
43 | */ |
44 | |
45 | oMenuItem.cfg.subscribe("configChanged", onMenuItemConfigChange); |
46 | |
47 | }); |
48 | |
49 | |
50 | /* |
51 | Add items to the Menu instance by passing an array of strings |
52 | (each of which represents the "text" configuration property of a |
53 | YAHOO.widget.MenuItem instance) to the "addItems" method. |
54 | */ |
55 | |
56 | oMenu.addItems([ |
57 | |
58 | "Selected MenuItem", |
59 | "Disabled MenuItem", |
60 | "MenuItem With A URL", |
61 | "Checked MenuItem" |
62 | |
63 | ]); |
64 | |
65 | |
66 | /* |
67 | Since this Menu instance is built completely from script, call the |
68 | "render" method passing in the DOM element that it should be |
69 | appended to. |
70 | */ |
71 | |
72 | oMenu.render("rendertarget"); |
73 | |
74 | |
75 | /* |
76 | Set a configuration property of each MenuItem to trigger the firing |
77 | of its configuration object's "configChanged" event. |
78 | */ |
79 | |
80 | oMenu.getItem(0).cfg.setProperty("selected", true); |
81 | oMenu.getItem(1).cfg.setProperty("disabled", true); |
82 | oMenu.getItem(2).cfg.setProperty("url", "http://www.yahoo.com"); |
83 | oMenu.getItem(3).cfg.setProperty("checked", true); |
view plain | print | ? |
INFO0ms (+0) 2:02:05 AM:global
Logger initialized
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