我正在尝试将 JavaScript InfoVis Toolkit 图的示例集成到我的Django 应用程序中。
现在，我只想在我的 Django 页面中显示上述示例图。我创建了下面给出的模板。
但它没有按预期工作。原始图表在网页加载后立即布局。
我的图表不是，必须手动将节点移动到它们之间的链接。
你可以在这个视频中看到它是如何工作的。
我应该在我的模板和/或脚本和/或 CSS 文件中进行哪些更改，以便在页面加载后立即布置图表（如原始示例中所示）？
这是我的 Django 模板：
<!DOCTYPE html>
{% block prehtml %}
{% endblock %}
<html>
<head>
<title>{% block title %}{% endblock %}</title>
<link href="{{ MEDIA_URL }}css/bootstrap.min.css" rel="stylesheet" media="screen">
<link href="{{ MEDIA_URL }}css/graphs.css" rel="stylesheet" media="screen">
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript" src="{{ MEDIA_URL }}js/jit.js"></script>
<script type="text/javascript">
var labelType, useGradients, nativeTextSupport, animate;
(function() {
var ua = navigator.userAgent,
iStuff = ua.match(/iPhone/i) || ua.match(/iPad/i),
typeOfCanvas = typeof HTMLCanvasElement,
nativeCanvasSupport = (typeOfCanvas == 'object' || typeOfCanvas == 'function'),
textSupport = nativeCanvasSupport
&& (typeof document.createElement('canvas').getContext('2d').fillText == 'function');
//I'm setting this based on the fact that ExCanvas provides text support for IE
//and that as of today iPhone/iPad current text support is lame
labelType = (!nativeCanvasSupport || (textSupport && !iStuff))? 'Native' : 'HTML';
nativeTextSupport = labelType == 'Native';
useGradients = nativeCanvasSupport;
animate = !(iStuff || !nativeCanvasSupport);
})();
var Log = {
elem: false,
write: function(text){
if (!this.elem)
this.elem = document.getElementById('log');
this.elem.innerHTML = text;
this.elem.style.left = (500 - this.elem.offsetWidth / 2) + 'px';
}
};
function init(){
// init data
var json = [
{
"adjacencies": [
"graphnode21",
{
"nodeTo": "graphnode1",
"nodeFrom": "graphnode0",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode13",
"nodeFrom": "graphnode0",
"data": {
"$color": "#909291"
}
}, {
"nodeTo": "graphnode14",
"nodeFrom": "graphnode0",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode15",
"nodeFrom": "graphnode0",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode16",
"nodeFrom": "graphnode0",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode17",
"nodeFrom": "graphnode0",
"data": {
"$color": "#557EAA"
}
}
],
"data": {
"$color": "#83548B",
"$type": "circle",
"$dim": 10
},
"id": "graphnode0",
"name": "graphnode0"
}, {
"adjacencies": [
{
"nodeTo": "graphnode2",
"nodeFrom": "graphnode1",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode4",
"nodeFrom": "graphnode1",
"data": {
"$color": "#909291"
}
}, {
"nodeTo": "graphnode5",
"nodeFrom": "graphnode1",
"data": {
"$color": "#909291"
}
}, {
"nodeTo": "graphnode6",
"nodeFrom": "graphnode1",
"data": {
"$color": "#909291"
}
}, {
"nodeTo": "graphnode7",
"nodeFrom": "graphnode1",
"data": {
"$color": "#909291"
}
}, {
"nodeTo": "graphnode8",
"nodeFrom": "graphnode1",
"data": {
"$color": "#909291"
}
}, {
"nodeTo": "graphnode10",
"nodeFrom": "graphnode1",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode11",
"nodeFrom": "graphnode1",
"data": {
"$color": "#909291"
}
}, {
"nodeTo": "graphnode12",
"nodeFrom": "graphnode1",
"data": {
"$color": "#909291"
}
}, {
"nodeTo": "graphnode13",
"nodeFrom": "graphnode1",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode14",
"nodeFrom": "graphnode1",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode15",
"nodeFrom": "graphnode1",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode16",
"nodeFrom": "graphnode1",
"data": {
"$color": "#909291"
}
}, {
"nodeTo": "graphnode17",
"nodeFrom": "graphnode1",
"data": {
"$color": "#557EAA"
}
}
],
"data": {
"$color": "#EBB056",
"$type": "circle",
"$dim": 11
},
"id": "graphnode1",
"name": "graphnode1"
}, {
"adjacencies": [
{
"nodeTo": "graphnode5",
"nodeFrom": "graphnode2",
"data": {
"$color": "#909291"
}
}, {
"nodeTo": "graphnode9",
"nodeFrom": "graphnode2",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode18",
"nodeFrom": "graphnode2",
"data": {
"$color": "#557EAA"
}
}
],
"data": {
"$color": "#416D9C",
"$type": "circle",
"$dim": 7
},
"id": "graphnode2",
"name": "graphnode2"
}, {
"adjacencies": [
{
"nodeTo": "graphnode5",
"nodeFrom": "graphnode3",
"data": {
"$color": "#909291"
}
}, {
"nodeTo": "graphnode9",
"nodeFrom": "graphnode3",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode10",
"nodeFrom": "graphnode3",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode12",
"nodeFrom": "graphnode3",
"data": {
"$color": "#557EAA"
}
}
],
"data": {
"$color": "#416D9C",
"$type": "square",
"$dim": 10
},
"id": "graphnode3",
"name": "graphnode3"
}, {
"adjacencies": [],
"data": {
"$color": "#83548B",
"$type": "square",
"$dim": 11
},
"id": "graphnode4",
"name": "graphnode4"
}, {
"adjacencies": [
{
"nodeTo": "graphnode9",
"nodeFrom": "graphnode5",
"data": {
"$color": "#909291"
}
}
],
"data": {
"$color": "#C74243",
"$type": "triangle",
"$dim": 8
},
"id": "graphnode5",
"name": "graphnode5"
}, {
"adjacencies": [
{
"nodeTo": "graphnode10",
"nodeFrom": "graphnode6",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode11",
"nodeFrom": "graphnode6",
"data": {
"$color": "#557EAA"
}
}
],
"data": {
"$color": "#83548B",
"$type": "circle",
"$dim": 11
},
"id": "graphnode6",
"name": "graphnode6"
}, {
"adjacencies": [],
"data": {
"$color": "#EBB056",
"$type": "triangle",
"$dim": 12
},
"id": "graphnode7",
"name": "graphnode7"
}, {
"adjacencies": [],
"data": {
"$color": "#C74243",
"$type": "star",
"$dim": 10
},
"id": "graphnode8",
"name": "graphnode8"
}, {
"adjacencies": [],
"data": {
"$color": "#83548B",
"$type": "circle",
"$dim": 12
},
"id": "graphnode9",
"name": "graphnode9"
}, {
"adjacencies": [
{
"nodeTo": "graphnode11",
"nodeFrom": "graphnode10",
"data": {
"$color": "#909291"
}
}
],
"data": {
"$color": "#70A35E",
"$type": "triangle",
"$dim": 11
},
"id": "graphnode10",
"name": "graphnode10"
}, {
"adjacencies": [],
"data": {
"$color": "#70A35E",
"$type": "circle",
"$dim": 11
},
"id": "graphnode11",
"name": "graphnode11"
}, {
"adjacencies": [],
"data": {
"$color": "#83548B",
"$type": "triangle",
"$dim": 10
},
"id": "graphnode12",
"name": "graphnode12"
}, {
"adjacencies": [
{
"nodeTo": "graphnode14",
"nodeFrom": "graphnode13",
"data": {
"$color": "#557EAA"
}
}
],
"data": {
"$color": "#EBB056",
"$type": "star",
"$dim": 7
},
"id": "graphnode13",
"name": "graphnode13"
}, {
"adjacencies": [],
"data": {
"$color": "#EBB056",
"$type": "triangle",
"$dim": 12
},
"id": "graphnode14",
"name": "graphnode14"
}, {
"adjacencies": [
{
"nodeTo": "graphnode16",
"nodeFrom": "graphnode15",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode17",
"nodeFrom": "graphnode15",
"data": {
"$color": "#557EAA"
}
}
],
"data": {
"$color": "#83548B",
"$type": "triangle",
"$dim": 11
},
"id": "graphnode15",
"name": "graphnode15"
}, {
"adjacencies": [
{
"nodeTo": "graphnode17",
"nodeFrom": "graphnode16",
"data": {
"$color": "#557EAA"
}
}
],
"data": {
"$color": "#C74243",
"$type": "star",
"$dim": 7
},
"id": "graphnode16",
"name": "graphnode16"
}, {
"adjacencies": [],
"data": {
"$color": "#416D9C",
"$type": "circle",
"$dim": 7
},
"id": "graphnode17",
"name": "graphnode17"
}, {
"adjacencies": [
{
"nodeTo": "graphnode19",
"nodeFrom": "graphnode18",
"data": {
"$color": "#557EAA"
}
}, {
"nodeTo": "graphnode20",
"nodeFrom": "graphnode18",
"data": {
"$color": "#557EAA"
}
}
],
"data": {
"$color": "#EBB056",
"$type": "triangle",
"$dim": 9
},
"id": "graphnode18",
"name": "graphnode18"
}, {
"adjacencies": [],
"data": {
"$color": "#70A35E",
"$type": "circle",
"$dim": 8
},
"id": "graphnode19",
"name": "graphnode19"
}, {
"adjacencies": [],
"data": {
"$color": "#C74243",
"$type": "star",
"$dim": 8
},
"id": "graphnode20",
"name": "graphnode20"
}
];
// end
// init ForceDirected
var fd = new $jit.ForceDirected({
//id of the visualization container
injectInto: 'graph',
//Enable zooming and panning
//by scrolling and DnD
Navigation: {
enable: true,
//Enable panning events only if we're dragging the empty
//canvas (and not a node).
panning: 'avoid nodes',
zooming: 10 //zoom speed. higher is more sensible
},
// Change node and edge styles such as
// color and width.
// These properties are also set per node
// with dollar prefixed data-properties in the
// JSON structure.
Node: {
overridable: true
},
Edge: {
overridable: true,
color: '#23A4FF',
lineWidth: 0.4
},
//Native canvas text styling
Label: {
type: labelType, //Native or HTML
size: 10,
style: 'bold'
},
//Add Tips
Tips: {
enable: true,
onShow: function(tip, node) {
//count connections
var count = 0;
node.eachAdjacency(function() { count++; });
//display node info in tooltip
tip.innerHTML = "<div class=\"tip-title\">" + node.name + "</div>"
+ "<div class=\"tip-text\"><b>connections:</b> " + count + "</div>";
}
},
// Add node events
Events: {
enable: true,
type: 'Native',
//Change cursor style when hovering a node
onMouseEnter: function() {
fd.canvas.getElement().style.cursor = 'move';
},
onMouseLeave: function() {
fd.canvas.getElement().style.cursor = '';
},
//Update node positions when dragged
onDragMove: function(node, eventInfo, e) {
var pos = eventInfo.getPos();
node.pos.setc(pos.x, pos.y);
fd.plot();
},
//Implement the same handler for touchscreens
onTouchMove: function(node, eventInfo, e) {
$jit.util.event.stop(e); //stop default touchmove event
this.onDragMove(node, eventInfo, e);
},
//Add also a click handler to nodes
onClick: function(node) {
if(!node) return;
// Build the right column relations list.
// This is done by traversing the clicked node connections.
var html = "<h4>" + node.name + "</h4><b> connections:</b><ul><li>",
list = [];
node.eachAdjacency(function(adj){
list.push(adj.nodeTo.name);
});
//append connections information
$jit.id('inner-details').innerHTML = html + list.join("</li><li>") + "</li></ul>";
}
},
//Number of iterations for the FD algorithm
iterations: 200,
//Edge length
levelDistance: 130,
// Add text to the labels. This method is only triggered
// on label creation and only for DOM labels (not native canvas ones).
onCreateLabel: function(domElement, node){
domElement.innerHTML = node.name;
var style = domElement.style;
style.fontSize = "0.8em";
style.color = "#ddd";
},
// Change node styles when DOM labels are placed
// or moved.
onPlaceLabel: function(domElement, node){
var style = domElement.style;
var left = parseInt(style.left);
var top = parseInt(style.top);
var w = domElement.offsetWidth;
style.left = (left - w / 2) + 'px';
style.top = (top + 10) + 'px';
style.display = '';
}
});
// load JSON data.
fd.loadJSON(json);
// compute positions incrementally and animate.
fd.computeIncremental({
iter: 40,
property: 'end',
onStep: function(perc){
Log.write(perc + '% loaded...');
},
onComplete: function(){
Log.write('done');
fd.animate({
modes: ['linear'],
transition: $jit.Trans.Elastic.easeOut,
duration: 2500
});
}
});
// end
}
</script>
{% block scripts %}{% endblock %}
</head>
<body onload="init();">
<div class="hero-unit">
<h1>{{ topic.title }}</h1>
</div>
<h2>Схема</h2>
<div id="graph"></div>
<h2>Высказывания</h2>
<ul>
{% for argelement in arg_elements %}
<li>{{ argelement.contents }}</li>
{% endfor %}
</ul>
{% block content %}
{% endblock %}
</body>
</html>