效果图:
以下展示实现这个效果,放到Django项目中,首先后端要穿数据到前端。
后端代码
# views.py
def home(request):
"""
首页
:param request:
:return:
"""
blogs = Blog.objects.all().order_by('-create_time')
tags = Tag.objects.all() # 获取所有的标签
data = {
'title': '首页|Hubery的个人博客',
'blogs': blogs,
'tags': tags
}
return render(request, 'blog/home.html', context=data)
前端代码
# css
/*标签云*/
#tagscloud {
width:250px;
height:260px;
position:relative;
font-size:12px;
color:#333;
margin:20px auto 0;
text-align:center;
}
#tagscloud a{
position:absolute;
top:0px;
left:0px;
color:#333;
font-family:Arial;
text-decoration:none;
margin:0 10px 15px 0;
line-height:18px;
text-align:center;
font-size:12px;
padding:1px 5px;
display:inline-block;
border-radius:3px;
}
/*标签云显示颜色的种类*/
#tagscloud a.tagc1{background:#666;color:#fff;}
#tagscloud a.tagc2{background:#F16E50;color:#fff;}
#tagscloud a.tagc3{background:#006633;color:#fff;}
#tagscloud a.tagc4{background:#FFB800;color:#fff;}
#tagscloud a.tagc5{background:#5FB878;color:#fff;}
#tagscloud a:hover{color:#fff;background:#0099ff;}
# home.html
<div class="tag_yun" style="background-color: white;margin-top: 20px; padding: 10px 10px">
<h3><i class="layui-icon layui-icon-snowflake"style="font-size: 20px; color: #1b9dec;margin-right: 5px" ></i>标签云</h3>
<hr class="layui-bg-black">
<--标签云展示部分--!>
<div id="tagscloud">
{% for tag in tags %}
<a href="{% url 'blog:get_tags' %}?tag_id={{ tag.id }}">{{ tag.name }} ({{ tag.blog_set.all.count }})</a>
{% endfor %}
</div>
</div>
# js文件
//标签云
var radius = 90;
var d = 200;
var dtr = Math.PI / 180;
var mcList = [];
var lasta = 1;
var lastb = 1;
var distr = true;
var tspeed = 11;
var size = 200;
var mouseX = 0;
var mouseY = 10;
var howElliptical = 1;
var aA = null;
var oDiv = null;
window.onload=function ()
{
var i=0;
var oTag=null;
oDiv=document.getElementById('tagscloud');
aA=oDiv.getElementsByTagName('a');
for(i=0;i<aA.length;i++)
{
oTag={};
aA[i].onmouseover = (function (obj) {
return function () {
obj.on = true;
this.style.zIndex = 9999;
this.style.color = '#fff';
this.style.padding = '5px 5px';
this.style.filter = "alpha(opacity=100)";
this.style.opacity = 1;
}
})(oTag);
aA[i].onmouseout = (function (obj) {
return function () {
obj.on = false;
this.style.zIndex = obj.zIndex;
this.style.color = '#fff';
this.style.padding = '5px';
this.style.filter = "alpha(opacity=" + 100 * obj.alpha + ")";
this.style.opacity = obj.alpha;
this.style.zIndex = obj.zIndex;
}
})(oTag);
oTag.offsetWidth = aA[i].offsetWidth;
oTag.offsetHeight = aA[i].offsetHeight;
mcList.push(oTag);
}
sineCosine( 0,0,0 );
positionAll();
(function () {
update();
setTimeout(arguments.callee, 40);
})();
};
function update()
{
var a, b, c = 0;
a = (Math.min(Math.max(-mouseY, -size), size) / radius) * tspeed;
b = (-Math.min(Math.max(-mouseX, -size), size) / radius) * tspeed;
lasta = a;
lastb = b;
if (Math.abs(a) <= 0.01 && Math.abs(b) <= 0.01) {
return;
}
sineCosine(a, b, c);
for (var i = 0; i < mcList.length; i++) {
if (mcList[i].on) {
continue;
}
var rx1 = mcList[i].cx;
var ry1 = mcList[i].cy * ca + mcList[i].cz * (-sa);
var rz1 = mcList[i].cy * sa + mcList[i].cz * ca;
var rx2 = rx1 * cb + rz1 * sb;
var ry2 = ry1;
var rz2 = rx1 * (-sb) + rz1 * cb;
var rx3 = rx2 * cc + ry2 * (-sc);
var ry3 = rx2 * sc + ry2 * cc;
var rz3 = rz2;
mcList[i].cx = rx3;
mcList[i].cy = ry3;
mcList[i].cz = rz3;
per = d / (d + rz3);
mcList[i].x = (howElliptical * rx3 * per) - (howElliptical * 2);
mcList[i].y = ry3 * per;
mcList[i].scale = per;
var alpha = per;
alpha = (alpha - 0.6) * (10 / 6);
mcList[i].alpha = alpha * alpha * alpha - 0.2;
mcList[i].zIndex = Math.ceil(100 - Math.floor(mcList[i].cz));
}
doPosition();
}
function positionAll()
{
var phi = 0;
var theta = 0;
var max = mcList.length;
for (var i = 0; i < max; i++) {
if (distr) {
phi = Math.acos(-1 + (2 * (i + 1) - 1) / max);
theta = Math.sqrt(max * Math.PI) * phi;
} else {
phi = Math.random() * (Math.PI);
theta = Math.random() * (2 * Math.PI);
}
//坐标变换
mcList[i].cx = radius * Math.cos(theta) * Math.sin(phi);
mcList[i].cy = radius * Math.sin(theta) * Math.sin(phi);
mcList[i].cz = radius * Math.cos(phi);
aA[i].style.left = mcList[i].cx + oDiv.offsetWidth / 2 - mcList[i].offsetWidth / 2 + 'px';
aA[i].style.top = mcList[i].cy + oDiv.offsetHeight / 2 - mcList[i].offsetHeight / 2 + 'px';
}
}
function doPosition()
{
var l = oDiv.offsetWidth / 2;
var t = oDiv.offsetHeight / 2;
for (var i = 0; i < mcList.length; i++) {
if (mcList[i].on) {
continue;
}
var aAs = aA[i].style;
if (mcList[i].alpha > 0.1) {
if (aAs.display != '')
aAs.display = '';
} else {
if (aAs.display != 'none')
aAs.display = 'none';
continue;
}
aAs.left = mcList[i].cx + l - mcList[i].offsetWidth / 2 + 'px';
aAs.top = mcList[i].cy + t - mcList[i].offsetHeight / 2 + 'px';
//aAs.fontSize=Math.ceil(12*mcList[i].scale/2)+8+'px';
//aAs.filter="progid:DXImageTransform.Microsoft.Alpha(opacity="+100*mcList[i].alpha+")";
aAs.filter = "alpha(opacity=" + 100 * mcList[i].alpha + ")";
aAs.zIndex = mcList[i].zIndex;
aAs.opacity = mcList[i].alpha;
}
}
function sineCosine( a, b, c)
{
sa = Math.sin(a * dtr);
ca = Math.cos(a * dtr);
sb = Math.sin(b * dtr);
cb = Math.cos(b * dtr);
c = Math.cos(c * dtr);
}
$(function () {
// 随机设置颜色的列表
var class_list = ['tagc1', 'tagc2', 'tagc3', 'tagc4', 'tagc5'];
$('#tagscloud a').each(function () {
$(this).addClass(class_list[parseInt(Math.random()*5)]);
})
});
写的非常详细,但是js代码看着好吃力 哈哈哈~