你可以繼續通過創建一個自定義drawFunc線連接你的父母和孩子節點。
該行的自定義drawFunc只是獲取父級&子位置並在它們之間繪製自己。
drawFunc: function(canvas){
var ctx=canvas.getContext();
var x1=parentNode.getPosition().x;
var y1=parentNode.getPosition().y;
var x2=childNode.getPosition().x;
var y2=childNode.getPosition().y;
ctx.save();
ctx.strokeStyle="red";
ctx.lineWidth=3;
ctx.beginPath();
ctx.moveTo(x1,y1);
ctx.lineTo(x2,y2);
ctx.stroke();
ctx.restore();
},
您可能還希望將線繪製在節點之後而不是頂部。
你可以通過設置stage.getDragLayer.afterDraw功能移動連接線到z-index的
stage.getDragLayer().afterDraw(function() {
connector.moveToBottom();
layer.draw();
});
這裏的底部做到這一點的代碼和一個小提琴:http://jsfiddle.net/m1erickson/tt2KG/
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Prototype</title>
<script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<script src="http://www.html5canvastutorials.com/libraries/kinetic-v4.3.3-beta.js"></script>
<style>
#container{
border:solid 1px #ccc;
margin-top: 10px;
}
</style>
<script>
$(function(){
function init(){
var stage = new Kinetic.Stage({
container: 'container',
width: 400,
height: 400
});
var layer = new Kinetic.Layer();
stage.add(layer);
var parentNode = new Kinetic.Circle({
x: 50,
y: 80,
radius: 40,
fill: "blue",
stroke: "red",
strokeWidth: 3,
draggable: true
});
var childNode = new Kinetic.Circle({
x: 150,
y: 80,
radius:25,
fill: "green",
stroke: "red",
strokeWidth: 3,
draggable: true
});
var connector = new Kinetic.Line({
drawFunc: function(canvas){
var ctx=canvas.getContext();
var x1=parentNode.getPosition().x;
var y1=parentNode.getPosition().y;
var x2=childNode.getPosition().x;
var y2=childNode.getPosition().y;
ctx.save();
ctx.strokeStyle="red";
ctx.lineWidth=3;
ctx.beginPath();
ctx.moveTo(x1,y1);
ctx.lineTo(x2,y2);
ctx.stroke();
ctx.restore();
},
points: [1,1,1,3],
stroke: "red",
strokeWidth: 2,
lineCap: 'round',
lineJoin: 'round',
opacity: 1,
draggable:false
});
layer.add(connector);
layer.add(parentNode);
layer.add(childNode);
// keep connector on rect1+rect2
stage.getDragLayer().afterDraw(function() {
connector.moveToBottom();
layer.draw();
});
layer.draw();
}
init();
}); // end $(function(){});
</script>
</head>
<body>
<div id="container"></div>
</body>
</html>