How to add MenuItem's to a MenuBar in Vaadin Declarative UI?

问题

The MenuItem components are not added to the MenuBar:

<v-menu-bar _id="menu" width="100%" />
   <v-menu-item caption="Option 1"/>
   <v-menu-item caption="Option 2"/>
</v-menu-bar>-->

回答1:

Found this MenuBarDeclarativeTest which suggests that items should be defined with just "menu".

String design = "<vaadin-menu-bar auto-open='' tabindex=5>"
            + "<menu checkable=''>Save</menu>"
            + "<menu description='Open a file'>Open</menu>"
            + "<menu disabled=''>Close</menu>"
            + "<menu icon='http://foo.bar/ico.png'>Help</menu>"
            + "<menu visible='false'>About</menu>"
            + "<menu>Sub<menu>Item</menu></menu>"
            + "<menu more>WTF?!</menu>" + "</vaadin-menu-bar>";

The same is suggested by the MenuBar sources

   public void readDesign(Element design, DesignContext designContext) {
    super.readDesign(design, designContext);
    Iterator i$ = design.children().iterator();

    while(i$.hasNext()) {
        Element itemElement = (Element)i$.next();
        if(itemElement.tagName().equals("menu")) {
            MenuBar.MenuItem menuItem = this.readMenuElement(itemElement);
            if(itemElement.hasAttr("more")) {
                this.setMoreMenuItem(menuItem);
            } else {
                this.menuItems.add(menuItem);
            }
        }
    }

    this.setHtmlContentAllowed(!design.hasAttr("plain-text"));
}

However the main menu tag should be v-menu-bar instead of vaadin-menu-bar or you'll get a com.vaadin.ui.declarative.DesignException: Unknown tag: vaadin-menu-bar, at least with version 7.5.6 which I am using for the time being.

Using "v-menu-bar" & "menu" I got a fairly normal result :-)

来源：https://stackoverflow.com/questions/32906587/how-to-add-menuitems-to-a-menubar-in-vaadin-declarative-ui