Проблема добавления холста ( fabric.js) внутри iframe
Hello, please can someone help me solve the problem adding canvas with fabric.js inside an iframe. I have a button that allows me to add rectangles to a canvas. I created the canvas object with fabric.js that I added inside an iframe despite all the tests I did but it doesn't work. Can someone help me solve this problem please?
Ошибки, которые я получаю:
Ошибка 1:
Error 1VM6034:32Uncaught TypeError: Cannot read property 'add' of null at Add (<anonymous>:32:12) at HTMLButtonElement.onclick ((index):1)
Ошибка 2:
VM6034:36Uncaught TypeError: fabric.Control is not a constructor at <anonymous>:36:52 at Object.coreUtilsModule.executeScripts(coreUtils.js:304) atHTMLScriptElement.newScript.onload.newScript.onerror (coreUtils.js:288)
Что я уже пробовал:
<html><head>
<meta charset="utf-8"/>
<title>monfabrick</title>
<script src="fabric.min.js"></script>
<script type="text/javascript">
var iframeDocument = document.getElementById('myiframe').contentWindow.document;
var canvas = iframeDocument.getElementById('c');
var fabricCanvas = new fabric.Canvas(canvas);
//var canvas = this.__canvas = new fabric.Canvas('c');
// create a rect object
var deleteIcon = "data:image/svg+xml,%3C%3Fxml version='1.0' encoding='utf-8'%3F%3E%3C!DOCTYPE svg PUBLIC '-//W3C//DTD SVG 1.1//EN' 'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd'%3E%3Csvg version='1.1' id='Ebene_1' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' width='595.275px' height='595.275px' viewBox='200 215 230 470' xml:space='preserve'%3E%3Ccircle style='fill:%23F44336;' cx='299.76' cy='439.067' r='218.516'/%3E%3Cg%3E%3Crect x='267.162' y='307.978' transform='matrix(0.7071 -0.7071 0.7071 0.7071 -222.6202 340.6915)' style='fill:white;' width='65.545' height='262.18'/%3E%3Crect x='266.988' y='308.153' transform='matrix(0.7071 0.7071 -0.7071 0.7071 398.3889 -83.3116)' style='fill:white;' width='65.544' height='262.179'/%3E%3C/g%3E%3C/svg%3E";
var img = document.createElement('img');
img.src = deleteIcon;
fabric.Object.prototype.transparentCorners = false;
fabric.Object.prototype.cornerColor = 'blue';
fabric.Object.prototype.cornerStyle = 'circle';
function Add() {
var rect = new fabric.Rect({
left: 100,
top: 50,
fill: 'yellow',
width: 200,
height: 100,
objectCaching: false,
stroke: 'lightgreen',
strokeWidth: 4,
});
canvas.add(rect);
canvas.setActiveObject(rect);
}
fabric.Object.prototype.controls.deleteControl = new fabric.Control({
x: 0.5,
y: -0.5,
offsetY: 16,
cursorStyle: 'pointer',
mouseUpHandler: deleteObject,
render: renderIcon,
cornerSize: 24
});
Add();
function deleteObject(eventData, target) {
var canvas = target.canvas;
canvas.remove(target);
canvas.requestRenderAll();
}
function renderIcon(ctx, left, top, styleOverride, fabricObject) {
var size = this.cornerSize;
ctx.save();
ctx.translate(left, top);
ctx.rotate(fabric.util.degreesToRadians(fabricObject.angle));
ctx.drawImage(img, -size/2, -size/2, size, size);
ctx.restore();
}
</script>
<style type="text/css" >
.controls {
display: inline-block;
}
</style>
</head>
<body>
<div class="controls">
<p>
<button id="add" onclick="Add()">Add a rectangle</button>
</p>
</div>
<iframe id="myiframe" width="400" height="400" src="http://localhost:7007/mapage/" name="moniframe" contenteditable="true" class="embed-responsive-item" allowfullscreen> </iframe>
</body></html>