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snap.js/demos/tutorial/index.html

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Tutorial
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Tutorial</title>
<link rel="stylesheet" href="../../dist/fonts/stylesheet.css">
<link rel="stylesheet" href="../../dist/css/prism.css">
<style media="screen">
pre.code {
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
padding: 10px;
height: 280px;
overflow: auto;
background: #181818;
border: solid 2px #181818;
}
#codelines {
display: none;
}
#svg {
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
border: solid 2px #ccc;
width: 300px;
height: 300px;
float: left;
margin-right: 10px;
font: 1em source-sans-pro, Source Sans Pro, Helvetica, sans-serif;
}
</style>
<script src="../../dist/snap.svg-min.js"></script>
<script src="../../dist/js/prism.js"></script>
<script>
var S;
window.onload = function () {
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var s = Snap(850, 35);
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function chooser(s, count) {
var loop = "M35,65a30,30,0,0,0,0-60a30,30,0,0,0,0,60",
line = "M35,65a30,30,0,0,0,0-60a30,30,0,0,0,0,60c30,0,60-60,90-60a30,30,0,0,1,0,60a30,30,0,0,1,0-60",
l1 = Snap.path.getTotalLength(loop),
l2 = Snap.path.getTotalLength(line),
cur = 1,
p = s.path({
path: loop,
fill: "none",
stroke: "#f00",
strokeWidth: 6,
strokeLinecap: "round"
});
for (var i = 1; i <= count; i++) {
s.text(90 * i - 55, 49, i).attr({
font: "45px source-sans-pro, Source Sans Pro, Helvetica, sans-serif",
textAnchor: "middle"
});
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(function (i) {
s.circle(90 * i - 55, 35, 40).attr({
opacity: 0
}).click(eve.f("tut.click", i - 1));
}(i));
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}
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s.path("M11.166,23.963L22.359,17.5c1.43-0.824,1.43-2.175,0-3L11.166,8.037c-1.429-0.826-2.598-0.15-2.598,1.5v12.926C8.568,24.113,9.737,24.789,11.166,23.963z").transform("t" + (90 * (count + 1) - 68) + ",18s2");
var but = s.circle(90 * (count + 1) - 55, 35, 30).attr({
fillOpacity: 0,
stroke: "#333",
strokeWidth: 2
});
eve.on("tut.click", function (I) {
p.attr({
path: loop,
transform: "t" + (90 * I) + ",0"
});
cur = I + 1;
});
function frameHandler(frame) {
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function anim() {
cur++;
if (cur > count) {
return;
}
if (typeof frame == "function") {
frame(cur);
}
Snap.animate(0, l2 - l1, function (val) {
p.attr({
path: Snap.path.getSubpath(line, val, val + l1)
});
}, 500, function () {
p.attr({
path: loop,
transform: p.transform() + "t90,0"
});
});
}
if (typeof frame == "function") {
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but.click(anim);
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} else {
anim();
}
}
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return frameHandler;
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}
var g = s.g();
g.attr({
transform: "s.5,.5,0,0"
});
var str = "",
code = document.getElementById("code");
var domcodelines = document.querySelectorAll("#codelines li"),
codelines = [],
replacers = {},
lines = [],
callback = function (i) {
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lines = [];
for (var j = 1; j <= i; j++) {
replacers[j - 1] && lines.pop();
lines.push(codelines[j - 1]);
}
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Snap("#svg").clear();
str = lines.join("\n");
eval(str);
code.innerHTML = Prism.highlight(str, Prism.languages.javascript);
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code.parentNode.scrollTop = code.parentNode.scrollTopMax || 1e9;
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};
for (var i = 0, ii = domcodelines.length; i < ii; i++) {
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codelines[i] = domcodelines[i].innerHTML;
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if (domcodelines[i].className == "replace") {
replacers[i] = true;
}
}
callback(1);
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chooser(g, codelines.length)(callback);
eve.on("tut.click", function (I) {
callback(I + 1);
});
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};
</script>
</head>
<body>
<ol id="codelines">
<li>// First lets create our drawing surface out of existing SVG element
// If you want to create new surface just provide dimensions
// like s = Snap(800, 600);
var s = Snap("#svg");</li>
<li>// Lets create big circle in the middle:
var bigCircle = s.circle(150, 150, 100);
// By default its black, lets change its attributes</li>
<li>bigCircle.attr({
fill: "#bada55",
stroke: "#000",
strokeWidth: 5
});</li>
<li>// Now lets create another small circle:
var smallCircle = s.circle(100, 150, 70);</li>
<li>// Lets put this small circle and another one into a group:
var discs = s.group(smallCircle, s.circle(200, 150, 70));</li>
<li>// Now we can change attributes for the whole group
discs.attr({
fill: "#fff"
});</li>
<li>// Now more interesting stuff
// Lets assign this group as a mask for our big circle
bigCircle.attr({
mask: discs
});</li>
<li>// Despite our small circle now is a part of a group
// and a part of a mask we could still access it:
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smallCircle.animate({r: 50}, 1000);</li>
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<li>// We don’t have reference for second small circle,
// but we could easily grab it with CSS selectors:
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discs.select("circle:nth-child(2)").animate({r: 50}, 1000);</li>
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<li>// Now lets create pattern
var p = s.path("M10-5-10,15M15,0,0,15M0-5-20,15").attr({
fill: "none",
stroke: "#bada55",
strokeWidth: 5
});
// To create pattern,
// just specify dimensions in pattern method:
p = p.pattern(0, 0, 10, 10);
// Then use it as a fill on big circle
bigCircle.attr({
fill: p
});</li>
<li>// We could also grab pattern from SVG
// already embedded into our page
discs.attr({
fill: Snap("#pattern")
});</li>
<li>// Lets change fill of circles to gradient
// This string means relative radial gradient
// from white to black
discs.attr({fill: "r()#fff-#000"});
// Note that you have two gradients for each circle</li>
<li>// If we want them to share one gradient,
// we need to use absolute gradient with capital R
discs.attr({fill: "R(150, 150, 100)#fff-#000"});</li>
<li>// Of course we could animate color as well
p.select("path").animate({stroke: "#f00"}, 1000);</li>
<li>// Now lets load external SVG file:
Snap.load("mascot.svg", function (f) {
// Note that we traversre and change attr before SVG
// is even added to the page
f.select("polygon[fill='#09B39C']").attr({fill: "#bada55"});
g = f.select("g");
s.append(g);
// Making croc draggable. Go ahead drag it around!
g.drag();
// Obviously drag could take event handlers too
// Looks like our croc is made from more than one polygon...
});</li>
<li class="replace">// Now lets load external SVG file:
Snap.load("mascot.svg", function (f) {
// Note that we traversre and change attr before SVG
// is even added to the page
f.selectAll("polygon[fill='#09B39C']").attr({fill: "#bada55"});
g = f.select("g");
s.append(g);
// Making croc draggable. Go ahead drag it around!
g.drag();
// Obviously drag could take event handlers too
// That’s better! selectAll for the rescue.
});</li>
<li>// Writing text as simple as:
s.text(200, 100, "Snap.svg");</li>
<li>// Provide an array of strings (or arrays), to generate tspans
var t = s.text(200, 120, ["Snap", ".", "svg"]);
t.selectAll("tspan:nth-child(3)").attr({
fill: "#900",
"font-size": "20px"
});</li>
</ol>
<svg id="svg"></svg>
<pre class="javascript code"><code data-language="javascript" class="language-javascript" id="code"></code></pre>
<svg width="0" height="0">
<pattern id="pattern" patternUnits="userSpaceOnUse" x="0" y="0" width="10" height="10" viewBox="0 0 10 10">
<path d="M-5,0,10,15M0-5,15,10" stroke="white" stroke-width="5"/>
</pattern>
</svg>
</body>
</html>