Question

I have a <ul> with data-role=”listview” attribute. For the <li> elements, i would like to have a <div>, within the <li>, that covers the main contents in the <li>, and when a person swipes to the right, the <div> animates sliding right, revealing the contents underneath div.

My problem is that when I add the div to the <li> element, i cant get the <div> to cover the <li> element. Even if i set a style of style: height=100%, the div seems only to take up about 2/3 of the <li> elements space.

Answer 1

You can add your DIV element to a list-item like so:

HTML —

    <ul data-role="listview">
        <li data-icon="grid"><a href="#">This is normal content.</a><div class="cover-div">Swipe to Uncover</div></li>
        <li data-icon="grid"><a href="#">This is normal content.</a><div class="cover-div">Swipe to Uncover</div></li>
        <li data-icon="grid"><a href="#">This is normal content.</a><div class="cover-div">Swipe to Uncover</div></li>
        <li data-icon="grid"><a href="#">This is normal content.</a><div class="cover-div">Swipe to Uncover</div></li>
        <li data-icon="grid"><a href="#">This is normal content.</a><div class="cover-div">Swipe to Uncover</div></li>
    </ul>

This creates the following output after jQuery Mobile initializes the list-view:

<li data-icon="grid" data-corners="false" data-shadow="false" data-iconshadow="true" data-wrapperels="div" data-iconpos="right" data-theme="c" class="ui-btn ui-btn-icon-right ui-li-has-arrow ui-li ui-btn-up-c">
    <div class="ui-btn-inner ui-li">
        <div class="ui-btn-text">
            <a href="#" class="ui-link-inherit">This is normal content.</a>
            <div class="cover-div">Swipe to Uncover</div>
        </div>
        <span class="ui-icon ui-icon-grid ui-icon-shadow">&nbsp;</span>
    </div>
</li>

Then you can add positioning and background-styling to the element:

CSS —

.cover-div {
    position   : absolute;
    top        : 0;
    left       : 0;
    width      : 100%;
    height     : 100%;
    z-index    : 2;
    background : #000;
    background : rgba(0, 0, 0, 0.7);
    color      : #fff;
}​

And finally you can detect the swipe events on the “cover” DIVs and animate the element off-screen:

JS —

//when a page is initialized by jQuery Mobile, we'll do our own initialization
$(document).delegate('[data-role="page"]', 'pageinit', function () {

    //find all the `.cover-div` elements on this page and bind to swipe left/right events for the elements
    $(this).find('.cover-div').bind('swipeleft swiperight', function (event) {

        //if the user swiped to the left then animate the DIV to the left
        if (event.type == 'swipeleft') {
            $(this).stop().animate({ left : '-100%' }, 250);

        //otherwise animate the DIV to the right
        } else {
            $(this).stop().animate({ left : '100%' }, 250);
        }
    });
});
​

Here is a demo: http://jsfiddle.net/pmqDf/1/