HTML5 Canvas 拖放组教程

要使用 Konva 拖放组,我们可以在实例化组时将配置对象的 draggable 属性设置为 true,或者我们可以使用 draggable() 方法。

Konva 拖放组示例view raw
<!DOCTYPE html>
<html>
<head>
<script src="https://unpkg.com/konva@9.3.18/konva.min.js"></script>
<meta charset="utf-8" />
<title>Konva Drag and Drop a Group Demo</title>
<style>
body {
margin: 0;
padding: 0;
overflow: hidden;
background-color: #f0f0f0;
}
</style>
</head>
<body>
<div id="container"></div>
<script>
var width = window.innerWidth;
var height = window.innerHeight;

var stage = new Konva.Stage({
container: 'container',
width: width,
height: height,
});

var shapesLayer = new Konva.Layer();
var group = new Konva.Group({
draggable: true,
});
var colors = ['red', 'orange', 'yellow', 'green', 'blue', 'purple'];

for (var i = 0; i < 6; i++) {
var box = new Konva.Rect({
x: i * 30 + 10,
y: i * 18 + 40,
width: 100,
height: 50,
name: colors[i],
fill: colors[i],
stroke: 'black',
strokeWidth: 4,
});
group.add(box);
}

group.on('mouseover', function () {
document.body.style.cursor = 'pointer';
});
group.on('mouseout', function () {
document.body.style.cursor = 'default';
});

shapesLayer.add(group);
stage.add(shapesLayer);
</script>
</body>
</html>