触发事件

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触发事件

我们可以通过 fire() 方法触发事件,这个方法允许我们通过程序触发各种事件,例如: click, mouseover, mousemove 等等,包括自定义事件。

Konva Fire_Events Demoview raw
<!DOCTYPE html>
<html>
<head>
<script src="https://unpkg.com/konva@4.0.18/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: window.innerWidth,
height: window.innerHeight
});

var layer = new Konva.Layer();

var circle = new Konva.Circle({
x: stage.width() / 2,
y: stage.height() / 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.text('you clicked on the circle!');
layer.draw();
});

layer.add(circle).add(text);
stage.add(layer);

// simulate click on circle
circle.fire('click');
</script>
</body>
</html>