Arip Hidayat Arip Hidayat - 2 months ago 24
CSS Question

Indented organization tree

I'm looking for some algorithm solution for building organization tree / graph which allow indented or offsetted one or more level.

I have have set of json data:

[{
"id": 1,
"level":1,
"parent_id": 0,
"name": "Board of Director"
}, {
"id": 2,
"level":2,
"parent_id": 1,
"name": "Finance Division"
}, {
"id": 3,
"level":3,
"parent_id": 2,
"name": "Finance Department"
}, {
"id": 4,
"level":3,
"parent_id": 2,
"name": "Sales Department"
}, {
"id": 5,
"level":3,
"parent_id": 1,
"name": "HR Division"
}]


Brief explanation:
_parent_id_ attribute to connect divisions with its parent by using line, while level attribute for classifying where division should located or indented, for example : Level 1 (Board of Director), level 2 (Finance Division) and level 3 (Finance Department, Sales Department, HR Division). Due to HR Division has _parent_id_=1 and level=3, then position in chart should be on line level with Finance Department and Sales Department.

Below is mockup organization tree and examples of Indented as HR Division shown.



.tree li {
list-style-type: none;
margin: 0;
padding: 10px 5px 0 5px;
position: relative
}
.tree li::before,
.tree li::after {
content: '';
left: -20px;
position: absolute;
right: auto
}
.tree li::before {
border-left: 1px solid #999;
bottom: 50px;
height: 100%;
top: 0;
width: 1px
}
.tree li::after {
border-top: 1px solid #999;
top: 30px;
width: 25px
}
.tree li div {
border: 1px solid #999;
display: inline-block;
padding: 8px 24px;
text-decoration: none
}
.tree li.parent > div {
cursor: pointer
}
.tree > ul > li::before,
.tree > ul > li::after {
border: 0
}
.tree li:last-child::before {
height: 30px
}
.tree li.parent > div:hover,
.tree li.parent > div:hover + ul li div {
background: #f3f3f4;
border: 1px solid #94a0b4;
color: #000
}
li div.just-line {
display: none;
}
div.just-line + ul > li::before {
padding: 0;
border-left: 0;
}
div.just-line + ul > li::after {
left: -40px;
width: 45px;
}
.no-padding {
padding: 0 !important;
}

<div class="tree">
<ul>
<li data-id="1">
<div>Board of Director</div>
<ul>
<li>
<div>Finance Division</div>
<ul>
<li>
<div>Finance Department</div>
<li>
<div>Sales Department</div>
</li>
</ul>
</li>
<li class="no-padding">
<div class="just-line"></div>
<ul>
<li>
<div>HR Division</div>
</li>
</ul>
</li>
</ul>
</li>
</ul>





Any help or suggestion would be much appreciated. Thanks.

Answer

Just to get you started, this is a two step solution which generates first a tree and the renders the DOM.

var data = [{ "id": 1, "level": 1, "parent_id": 0, "name": "Board of Director" }, { "id": 2, "level": 2, "parent_id": 1, "name": "Finance Division" }, { "id": 3, "level": 3, "parent_id": 2, "name": "Finance Department" }, { "id": 4, "level": 3, "parent_id": 2, "name": "Sales Department" }, { "id": 5, "level": 3, "parent_id": 1, "name": "HR Division" }],
    tree = function (data, root) {
        var r, o = {};
        data.forEach(function (a) {
            a.children = o[a.id] && o[a.id].children;
            o[a.id] = a;
            if (a.parent_id === root) {
                r = a;
            } else {
                o[a.parent_id] = o[a.parent_id] || {};
                o[a.parent_id].children = o[a.parent_id].children || [];
                o[a.parent_id].children.push(a);
            }
        });
        return r;
    }(data, 0),
    ul = document.createElement('ul');

[tree].forEach(function iter(level) {
    return function (a) {
        var li = document.createElement('li'),
            div = document.createElement('div'),
            ul,
            l = level;

        this.appendChild(li);
        while (++l < a.level) {
            div.className = 'just-line';
            li.className = 'no-padding';
            li.appendChild(div);
            ul = document.createElement('ul');
            li.appendChild(ul);
            li = document.createElement('li');
            ul.appendChild(li);
            div = document.createElement('div');
        }
        div.appendChild(document.createTextNode(a.name));
        li.appendChild(div);

        if (a.children) {
            ul = document.createElement('ul');
            li.appendChild(ul);
            a.children.forEach(iter(a.level), ul);
        }
    };
}(0), ul);
document.getElementById('tree').appendChild(ul);
.tree li { list-style-type: none; margin: 0; padding: 10px 5px 0 5px; position: relative; }
.tree li::before, .tree li::after { content: ''; left: -20px; position: absolute; right: auto; }
.tree li::before { border-left: 1px solid #999; bottom: 50px; height: 100%; top: 0; width: 1px; }
.tree li::after { border-top: 1px solid #999; top: 30px; width: 25px; }
.tree li div { border: 1px solid #999; display: inline-block; padding: 8px 24px; text-decoration: none; }
.tree li.parent > div { cursor: pointer; }
.tree > ul > li::before, .tree > ul > li::after { border: 0; }
.tree li:last-child::before { height: 30px; }
.tree li.parent > div:hover, .tree li.parent > div:hover + ul li div { background: #f3f3f4; border: 1px solid #94a0b4; color: #000; }
li div.just-line { display: none; }
div.just-line + ul > li::before { padding: 0; border-left: 0; }
div.just-line + ul > li::after { left: -40px; width: 45px; }
.no-padding { padding: 0 !important; }
<div id="tree" class="tree"></div>