HTML Tree Full Width Hover Effect

I have an html tree which is mostly consisting of nested unordered lists. I need to create a full width hover effect for each leaf, something similar with windows file menu tree ho

Solution 1:

I've had the same problem as you, after some trying and testing I came up with this. It allows you to add scrollbars and put the padding on the inner .

HTML

<div class="tree" style="width:256px; height:256px;">
    <div>
        <ul>
            <li>
                <div><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit</span></div>
            </li>
            <li>
                <div><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit</span></div>
                <ul>
                    <li>
                        <div><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit</span></div>
                    </li>
                </ul>
            </li>
        </ul>
    </div>
</div>
</div>

CSS

.tree {
    position:relative;
    display: block;
    overflow: auto;
    border: 1px solid #8B9097;
    background-color: #fff;
    margin-left:200px;
    /*! margin-left: just for testing */
}
.tree > div {
    display:block;
    position:absolute;
    min-width:100%;
}
.tree * {
    white-space: nowrap;
}
.tree ul {
    margin:0;
    list-style-type: none;
    padding-left: 20px;
}
.tree li > div {
    position:relative;
    margin-left:-100000px;
    padding-left:100000px;
    border: 1px solid transparent;
    display:block;
}
.tree li div:hover {
    background-color: #B6BABF;
    color: #fff;
}
.tree li.collapsed > ul {
    display:none;
}

.tree li.expanded > ul {
    display:inherit;
}

http://jsfiddle.net/WknDZ/17/

Solution 2:

A solution changing only the part of the CSS under "hack". I assume that at least you can change that

CSS

/*Full width hack*/
.tree.fullWidth { overflow: hidden; }
.tree.fullWidth li .item .overlay { right: -8px; width: 314px; left: auto !important; }

demo

If the tree has a variable width, this is better:

.tree.fullWidth li .item .overlay { 
    right: -8px; 
    width: 300px;
    padding-left: 14px; 
    left: auto !important; 
}

It works exactly like the other version, but now the width is the same that the tree width, so the Javascript doesn't need to set a magic width (that you don't know from where it comes:

Solution 3:

I faced a similar situation few days ago.

Heres 1 way to approach it ( assuming you've got full control over the HTML )

HTML

<div class="tree relative">
    <ul>
        <li>
            <div class="item">
                <div class="overlay"></div>
                <span class="relative">Node 1</span>

            </div>
            <ul>
                <li>
                    <div class="item selected">
                        <div class="overlay"></div>
                        <span class="relative">Node 2</span>
                    </div>
                </li>
            </ul>
        </li>
    </ul>
</div>

CSS

.relative {
    position:relative;
}

.tree { 
    width: 300px; 
    border: 1px solid #000; 
    padding: 10px; 
    margin-bottom: 15px; 
}

.tree ul { margin: 0; padding: 0; list-style-type: none; }
.tree ul li { padding-left: 16px; }

/*.tree li .item { position: relative; }*/

.tree li .item .overlay { 
    position: absolute; 
    left: 0; 
    right:0;
    /*
    top: 0; 
    width: 100%; 
    height: 100%;
    */
    height:26px; /* well, thats a bummer */
    background-color: #C5E7E6; 
    display: none; 
    border: 1px solid red; 
}
.tree li .item:hover .overlay { display: block; }

Fiddle: http://jsfiddle.net/Varinder/5fKP4/2/