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This is a utility to create Twitter Bootstrap styled nav bar with drop down menus from the output of Lift's Menu.builder. Any menu item that is defined with submenus will automatically rendered as a drop-down menu.

You download an example of this library used in an application here and see a running example http://www.damianhelme.com/tbnav.

To use the utility in your own project:

  1. download and build the TBUtils library:

    git clone https://github.com/dph01/lift-TBUtils
    cd liftTBUtils
    ./sbt publish-local
    
  2. In the project in which you want to use the library, add the following to the dependencies in the project's build.sbt:

    "com.damianhelme" %% "tbutils" % "0.1.0" % "compile"
    
  3. In order to tell Lift where to look for the TBNav snippet, in Boot.scala add:

    LiftRules.addToPackages("com.damianhelme.tbutils")
    
  4. In Boot.scala, define your menu sitemap with something like:

    val entries = List(Menu("Home") / "index",
      Menu("Page 1") / "page1",
      Menu("Page 2") / "page2",
      Menu("Page 3") / "#"  >> PlaceHolder submenus (
        Menu("Page 3a") / "page3a" ,  
        Menu("Page 3b") / "page3b" ,
        Menu("Page 3c") / "page3c"))
    
    def sitemap = SiteMap(entries: _*)
    LiftRules.setSiteMap(sitemap)
    

    Every menu entry with a submenu will the rendered as a menu drop-down. The 'PlaceHolder' is optional, but it's clearer to other developers that you intend this entry to be the root of a drop-down if you include it.

  5. Download the Twitter Bootstrap library and copy into a subdirectory of /src/main/webapp (e.g. /src/main/webapp/bootstrap/2.0.0)

  6. Include the Bootstrap files in your html:

    <link rel="stylesheet" type="text/css" href="/bootstrap/2.0.0/css/bootstrap.css">
    <script id="bootstrap-dropdown" src="/bootstrap/2.0.0/js/bootstrap-dropdown.js" type="text/javascript"></script>
    
  7. Make sure jquery 1.7.0 or later is included in your html. An easy way to do this would be to copy the jquery file into a subdirectory of /sr/main/webpp (e.g. /src/main/webmapp/jquery) and include a line such as the following in your html:

    <script id="jquery" src="/jquery/jquery-1.7.1.js" type="text/javascript"></script>
    
  8. In your html, wrap your call to Menu.builder with call to TBNav.menuToTBNav:

    <div class="topbar">
     <div class="navbar-inner">
      <div class="fill">
        <div class="container">
          <a class="brand" href="/">My App</a> 
          <span data-lift="lift:TBNav.menuToTBNav?eager_eval=true"> 
            <span data-lift="lift:Menu.builder?top:class=nav;li_item:class=active;linkToSelf=true;expandAll=true"></span>
          </span>
        </div>
      </div>
    </div>
    

    The classes: topbar, navbar-inner, fill and container etc. are Bootstrap class for formatting the navigation bar.

For comments, questions, etc. please see the accompanying blogpost

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