Creating and Positioning an Overlay : Overlay « YUI Library « JavaScript DHTML






Creating and Positioning an Overlay

 

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>


    <meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>Creating and Positioning an Overlay</title>

<style type="text/css">
/*margin and padding on body element
  can introduce errors in determining
  element position and are not recommended;
  we turn them off as a foundation for YUI
  CSS treatments. */
body {
  margin:0;
  padding:0;
}
</style>

<link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/fonts/fonts-min.css" />
<link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/container/assets/skins/sam/container.css" />
<script type="text/javascript" src="yui_2.7.0b-lib/yahoo-dom-event/yahoo-dom-event.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/container/container-min.js"></script>

<!--there is no custom header content for this example-->

</head>

<body class=" yui-skin-sam">


<h1>Creating and Positioning an Overlay</h1>

<div class="exampleIntro">
  <p>Overlays are extensions of Modules and differ in the sense that the float <em>above</em> the normal page flow.  They can be positioned in three different ways: By fixing them to the center of the viewport (overlay1 below), by specifying a position (overlay2), and by positioning them relative to a context element (overlay3).</p>

<p>Use the buttons in the example below to show and hide the three Overlay instances.</p>      
</div>

<!--BEGIN SOURCE CODE FOR EXAMPLE  -->

<style>
  .yui-overlay { position:absolute;background:#fff;border:1px dotted black;padding:5px;margin:10px; }
  .yui-overlay .hd { border:1px solid red;padding:5px; }
  .yui-overlay .bd { border:1px solid green;padding:5px; }
  .yui-overlay .ft { border:1px solid blue;padding:5px; }

  #ctx { background:orange;width:100px;height:25px; }
  
  #example {height:15em;}
</style>

<script>
    YAHOO.namespace("example.container");

    function init() {
      // Build overlay1 based on markup, initially hidden, fixed to the center of the viewport, and 300px wide
      YAHOO.example.container.overlay1 = new YAHOO.widget.Overlay("overlay1", { fixedcenter:true,
                                            visible:false,
                                            width:"300px" } );
      YAHOO.example.container.overlay1.render();
      YAHOO.log("Overlay1 rendered.", "info", "example");

      // Build overlay2 dynamically, initially hidden, at position x:400,y:500, and 300px wide
      YAHOO.example.container.overlay2 = new YAHOO.widget.Overlay("overlay2", { xy:[600,200],
                                            visible:false,
                                            width:"300px" } );
      YAHOO.example.container.overlay2.setHeader("Overlay #2 from Script");
      YAHOO.example.container.overlay2.setBody("This is a dynamically generated Overlay.");
      YAHOO.example.container.overlay2.setFooter("End of Overlay #2");
      YAHOO.example.container.overlay2.render(document.body);
      YAHOO.log("Overlay2 rendered.", "info", "example");

      // Build overlay3 dynamically, initially hidden, aligned to context element "context", and 200px wide

            // Re-align just before the overlay is shown and whenever the window is resized to account for changes in the position  
            // of the context element after the initial context alignment 
      YAHOO.example.container.overlay3 = new YAHOO.widget.Overlay("overlay3", { context:["ctx","tl","bl", ["beforeShow", "windowResize"]],
                                            visible:false,
                                            width:"200px" } );
      YAHOO.example.container.overlay3.setHeader("Overlay #3 from Script");
      YAHOO.example.container.overlay3.setBody("This is a dynamically generated Overlay.");
      YAHOO.example.container.overlay3.setFooter("End of Overlay #3");
      YAHOO.example.container.overlay3.render(document.body);
      YAHOO.log("Overlay3 rendered.", "info", "example");

      YAHOO.util.Event.addListener("show1", "click", YAHOO.example.container.overlay1.show, YAHOO.example.container.overlay1, true);
      YAHOO.util.Event.addListener("hide1", "click", YAHOO.example.container.overlay1.hide, YAHOO.example.container.overlay1, true);

      YAHOO.util.Event.addListener("show2", "click", YAHOO.example.container.overlay2.show, YAHOO.example.container.overlay2, true);
      YAHOO.util.Event.addListener("hide2", "click", YAHOO.example.container.overlay2.hide, YAHOO.example.container.overlay2, true);

      YAHOO.util.Event.addListener("show3", "click", YAHOO.example.container.overlay3.show, YAHOO.example.container.overlay3, true);
      YAHOO.util.Event.addListener("hide3", "click", YAHOO.example.container.overlay3.hide, YAHOO.example.container.overlay3, true);
    }

    YAHOO.util.Event.addListener(window, "load", init);
</script>


<div>
  overlay1:
  <button id="show1">Show</button>
  <button id="hide1">Hide</button>
</div>
<div>
  overlay2:
  <button id="show2">Show</button>
  <button id="hide2">Hide</button>
</div>
<div>
  overlay3:
  <button id="show3">Show</button>
  <button id="hide3">Hide</button>
</div>

<div id="ctx">Align to me</div>

<div id="overlay1" style="visibility:hidden">
  <div class="hd">Overlay #1 from Markup</div>
  <div class="bd">This is a Overlay that was marked up in the document.</div>
  <div class="ft">End of Overlay #1</div>
</div>

<!--END SOURCE CODE FOR EXAMPLE  -->

</body>
</html>
<!-- presentbright.corp.yahoo.com uncompressed/chunked Thu Feb 19 10:53:10 PST 2009 -->

   
  








yui_2.7.0b.zip( 4,431 k)

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1.Using the Overlay Manager to Manage Multiple Panels