<!DOCTYPE html>
<html>
<head>
<script src="https://unpkg.com/[email protected]/konva.min.js"></script>
<meta charset="utf-8" />
<title>Konva Shape Tango Demo</title>
<style>
body {
margin: 0;
padding: 0;
overflow: hidden;
background-color: #f0f0f0;
}
#tango {
position: absolute;
top: 10px;
left: 10px;
padding: 10px;
}
</style>
</head>
<body>
<div id="container"></div>
<input type="button" id="tango" value="Tango!" />
<script>
var width = window.innerWidth;
var height = window.innerHeight;
var colors = ['red', 'orange', 'yellow', 'green', 'blue', 'purple'];
function getRandomColor() {
return colors[Math.round(Math.random() * 5)];
}
function tango(layer) {
for (var n = 0; n < layer.getChildren().length; n++) {
var color = getRandomColor();
var shape = layer.getChildren()[n];
var stage = shape.getStage();
var radius = Math.random() * 100 + 20;
new Konva.Tween({
node: shape,
duration: 1,
x: Math.random() * stage.width(),
y: Math.random() * stage.height(),
rotation: Math.random() * 360,
radius: radius,
opacity: (radius - 20) / 100,
easing: Konva.Easings.EaseInOut,
fill: color,
}).play();
}
}
var stage = new Konva.Stage({
container: 'container',
width: width,
height: height,
});
var layer = new Konva.Layer();
for (var n = 0; n < 10; n++) {
var radius = Math.random() * 100 + 20;
var color = getRandomColor();
var shape = new Konva.RegularPolygon({
x: Math.random() * stage.width(),
y: Math.random() * stage.height(),
sides: Math.ceil(Math.random() * 5 + 3),
radius: radius,
fill: color,
opacity: (radius - 20) / 100,
draggable: true,
});
layer.add(shape);
}
stage.add(layer);
document.getElementById('tango').addEventListener(
'click',
function () {
tango(layer);
},
false
);
</script>
</body>
</html>
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