HTML5 Canvas 使用Konva 触发事件
使用Konva触发事件,我们可以用fire()方法.
这使我们能够以编程方式触发事件，如点击，鼠标经过，
鼠标移动等，还可以是自定义事件，如foo和bar。
Konva Fire_Events Demo 点击查看
<!DOCTYPE html>
<html>
<head>
<script src="https://cdn.rawgit.com/konvajs/konva/1.4.0/konva.min.js"></script>
<meta charset="utf-8">
<title>Konva Fire Event Demo</title>
<style>
body {
margin: 0;
padding: 0;
overflow: hidden;
background-color: #F0F0F0;
}
</style>
</head>
<body>
<div id="container"></div>
<script>
var stage = new Konva.Stage({
container: 'container',
width: 300,
height: 300
});
var layer = new Konva.Layer();
var circle = new Konva.Circle({
x: stage.getWidth() / 2,
y: stage.getHeight() / 2 + 10,
radius: 70,
fill: 'red',
stroke: 'black',
strokeWidth: 4
});
var text = new Konva.Text({
text: '',
fontFamily: 'Calibri',
fontSize: 24,
fill: 'black',
x: 10,
y: 10
});
circle.on('click', function(evt) {
text.setText('you clicked on the circle!');
layer.draw();
});
layer.add(circle).add(text);
stage.add(layer);
// simulate click on circle 模拟鼠标点击事件
circle.fire('click');
</script>
</body>
</html>