家谱树 CSS

Question

有没有办法让子元素跟随其父元素？

问题在于，如果只有一个子元素，并且父元素有很长的文本，连接器的位置会变得非常糟糕。我该如何解决？

Fiddle演示

* {margin: 0; padding: 0;}

.tree ul {
    padding-top: 20px; position: relative;  
    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}

.tree li {
    float: left; text-align: center;
    list-style-type: none;
    position: relative;
    padding: 20px 5px 0 5px;
    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}

/*We will use ::before and ::after to draw the connectors*/
.tree li::before, .tree li::after{
    content: '';
    position: absolute; top: 0; right: 50%;
    border-top: 1px solid #ccc;
    width: 50%; height: 20px;
}
.tree li::after{
    right: auto; left: 50%;
    border-left: 1px solid #ccc;
}

/*We need to remove left-right connectors from elements without 
any siblings*/
.tree li:only-child::after, .tree li:only-child::before {
    display: none;
}

/*Remove space from the top of single children*/
.tree li:only-child{ padding-top: 0;}

/*Remove left connector from first child and 
right connector from last child*/
.tree li:first-child::before, .tree li:last-child::after{
    border: 0 none;
}
/*Adding back the vertical connector to the last nodes*/
.tree li:last-child::before{
    border-right: 1px solid #ccc;
    border-radius: 0 5px 0 0;
    -webkit-border-radius: 0 5px 0 0;
    -moz-border-radius: 0 5px 0 0;
}
.tree li:first-child::after{
    border-radius: 5px 0 0 0;
    -webkit-border-radius: 5px 0 0 0;
    -moz-border-radius: 5px 0 0 0;
}

/*Time to add downward connectors from parents*/
.tree ul ul::before{
    content: '';
    position: absolute; top: 0; left: 50%;
    border-left: 1px solid #ccc;
    width: 0; height: 20px;
}

.tree li a{
    border: 1px solid #ccc;
    padding: 5px 10px;
    text-decoration: none;
    color: #666;
    font-family: arial, verdana, tahoma;
    font-size: 11px;
    display: inline-block;
    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;    
    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}

/*Time for some hover effects*/
/*We will apply the hover effect the lineage of the element also*/
.tree li a:hover, .tree li a:hover+ul li a {
    background: #c8e4f8; color: #000; border: 1px solid #94a0b4;
}
/*Connector styles on hover*/
.tree li a:hover+ul li::after, 
.tree li a:hover+ul li::before, 
.tree li a:hover+ul::before, 
.tree li a:hover+ul ul::before{
    border-color:  #94a0b4;
}

<!--
We will create a family tree using just CSS(3)
The markup will be simple nested lists
-->
<div class="tree">
    <ul>
        <li>
            <a href="#">Parent sdkfjnsdkfsdnfksdfnskfns</a>
            <ul>
                <li>
                    <a href="#">Child</a>
                </li>
            </ul>
        </li>
    </ul>
</div>

- Curunir

---

仅CSS可以“下坡”。父元素无法从子元素读取规则。子元素也无法将规则向上推送。 - Marc B

这是您要找的吗：https://jsfiddle.net/yau5juka/1/ - Asons

如果是这种情况，你有没有想过如何解决它，或者你有没有其他的建议？没事了。 - Curunir

float: left 浮动元素向左浮动，而非居中。 - Oriol

注意：原始来源似乎来自http://thecodeplayer.com/walkthrough/css3-family-tree。 - koppor

Answer 1

将您的 .tree li 规则中的 float:left 改为 display: inline-block。

/*Now the CSS*/
* {margin: 0; padding: 0;}

.tree ul {
 padding-top: 20px; position: relative;
 transition: all 0.5s;
 -webkit-transition: all 0.5s;
 -moz-transition: all 0.5s;
}

.tree li {
  display: inline-block;
 text-align: center;
 list-style-type: none;
 position: relative;
 padding: 20px 5px 0 5px; 
 transition: all 0.5s;
 -webkit-transition: all 0.5s;
 -moz-transition: all 0.5s;
}

/*We will use ::before and ::after to draw the connectors*/

.tree li::before, .tree li::after{
 content: '';
 position: absolute; top: 0; right: 50%;
 border-top: 1px solid #ccc;
 width: 50%; height: 20px;
}
.tree li::after{
 right: auto; left: 50%;
 border-left: 1px solid #ccc;
}

/*We need to remove left-right connectors from elements without 
any siblings*/
.tree li:only-child::after, .tree li:only-child::before {
 display: none;
}

/*Remove space from the top of single children*/
.tree li:only-child{ padding-top: 0;}

/*Remove left connector from first child and 
right connector from last child*/
.tree li:first-child::before, .tree li:last-child::after{
 border: 0 none;
}
/*Adding back the vertical connector to the last nodes*/
.tree li:last-child::before{
 border-right: 1px solid #ccc;
 border-radius: 0 5px 0 0;
 -webkit-border-radius: 0 5px 0 0;
 -moz-border-radius: 0 5px 0 0;
}
.tree li:first-child::after{
 border-radius: 5px 0 0 0;
 -webkit-border-radius: 5px 0 0 0;
 -moz-border-radius: 5px 0 0 0;
}

/*Time to add downward connectors from parents*/
.tree ul ul::before{
 content: '';
 position: absolute; top: 0; left: 50%;
 border-left: 1px solid #ccc;
 width: 0; height: 20px;
}

.tree li a{
 border: 1px solid #ccc;
 padding: 5px 10px;
 text-decoration: none;
 color: #666;
 font-family: arial, verdana, tahoma;
 font-size: 11px;
 display: inline-block;
 
 border-radius: 5px;
 -webkit-border-radius: 5px;
 -moz-border-radius: 5px;
 
 transition: all 0.5s;
 -webkit-transition: all 0.5s;
 -moz-transition: all 0.5s;
}

/*Time for some hover effects*/
/*We will apply the hover effect the the lineage of the element also*/
.tree li a:hover, .tree li a:hover+ul li a {
 background: #c8e4f8; color: #000; border: 1px solid #94a0b4;
}
/*Connector styles on hover*/
.tree li a:hover+ul li::after, 
.tree li a:hover+ul li::before, 
.tree li a:hover+ul::before, 
.tree li a:hover+ul ul::before{
 border-color:  #94a0b4;
}

/*Thats all. I hope you enjoyed it.
Thanks :)*/

<!--
We will create a family tree using just CSS(3)
The markup will be simple nested lists
-->
<div class="tree">
 <ul>
  <li>
   <a href="#">Parent sdkfjnsdkfsdnfksdfnskfns</a>
   <ul>
    <li>
     <a href="#">Child</a>
    </li>
   </ul>
  </li>
 </ul>
</div>

- Asons

---

我本来想指出所有东西都向左浮动...这使得绝对定位变得棘手..好发现！ - Scott

这个很好用，但我添加了 li { vertical-align: top }。 - maaarghk

Answer 2

在类“tree”中添加“white-space:nowrap; overflow-x:auto;”，并将浮动值更改为“display:inline-table”。

试试看！

* {
    margin: 0; 
    padding: 0;
}
body{

}
.tree{
    white-space: nowrap;
    overflow-x: auto;
}
.tree ul {
    padding-top: 20px; position: relative;
    /* display: inline-block; */
    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
 
}
.tree li {
    display: inline-table; 
    text-align: center;
    list-style-type: none;
    position: relative;
    padding: 20px 5px 0 5px;
    /* display: inline-block;  */
    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;

}
 
/*We will use ::before and ::after to draw the connectors*/
 
.tree li::before, .tree li::after{
    content: '';
    position: absolute; top: 0; 
    right: 50%;
    border-top: 1px solid #ccc;
    width: 50%; 
    height: 20px;
}
.tree li::after{
    right: auto; 
    left: 50%;
    border-left: 1px solid #ccc;
}
 
/*We need to remove left-right connectors from elements without
any siblings*/
.tree li:only-child::after, .tree li:only-child::before {
    display: none;
}
/*Remove space from the top of single children*/
.tree li:only-child{ padding-top: 0;}
/*Remove left connector from first child and
right connector from last child*/
.tree li:first-child::before, .tree li:last-child::after{
    border: 0 none;
}
/*Adding back the vertical connector to the last nodes*/
.tree li:last-child::before{
    border-right: 1px solid #ccc;
    border-radius: 0 5px 0 0;
    -webkit-border-radius: 0 5px 0 0;
    -moz-border-radius: 0 5px 0 0;
}
.tree li:first-child::after{
    border-radius: 5px 0 0 0;
    -webkit-border-radius: 5px 0 0 0;
    -moz-border-radius: 5px 0 0 0;
}
 
/*Time to add downward connectors from parents*/
.tree ul ul::before{
    content: '';
    position: absolute; top: 0; left: 50%;
    border-left: 1px solid #ccc;
    width: 0; height: 20px;
}
.tree li a{
    border: 1px solid #ccc;
    padding: 5px 10px;
    text-decoration: none;
    color: #666;
    font-family: arial, verdana, tahoma;
    font-size: 11px;
    display: inline-block;
 
    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
 
    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}
/*Time for some hover effects*/
/*We will apply the hover effect the the lineage of the element also*/
.tree li a:hover, .tree li a:hover+ul li a {
    background: #c8e4f8; color: #000; border: 1px solid #94a0b4;
}
/*Connector styles on hover*/
.tree li a:hover+ul li::after,
.tree li a:hover+ul li::before,
.tree li a:hover+ul::before,
.tree li a:hover+ul ul::before{
    border-color:  #94a0b4;
}

- Nguyễn Minh Đức