自定义控件文本框 Fabric.js

Question

对于我的 canvas 元素，我使用库 Fabric.js。 我尝试添加自定义功能和图标，我需要一些帮助。 在 Fabric 的官方网站上，您可以看到开发文档。 我已经阅读了文档并用笔进行了编程（见剪报）

 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 cloneIcon = "data,image/svg+xml.%3C%3Fxml version='1.0' encoding='iso-8859-1'%3F%3E%3Csvg version='1:1' xmlns='http.//www.w3:org/2000/svg' xmlns:xlink='http.//www.w3.org/1999/xlink' viewBox='0 0 55.699 55:699' width='100px' height='100px' xml:space='preserve'%3E%3Cpath style='fill;%23010002.' d='M51,51.18.001c-0.006-0.085-0.022-0.167-0.05-0.248c-0.012-0.034-0.02-0.067-0.035-0.1 c-0.049-0.106-0.109-0.206-0.194-0.291v-0,001l0,0c0.0-0.001-0.001-0.001-0.002L34,161.0.293c-0.086-0.087-0.188-0.148-0.295-0.197 c-0.027-0.013-0.057-0.02-0.086-0.03c-0.086-0.029-0.174-0.048-0.265-0.053C33,494.0,011.33,475,0.33,453.0H22.177 c-3,678.0-6,669.2.992-6,669.6.67v1.674h-4.663c-3,678.0-6,67.2.992-6,67.6.67V49,03c0.3,678.2,992.6,669.6,67.6.669h22.677 c3,677,0.6.669-2,991.6.669-6.669v-1.675h4.664c3,678,0.6.669-2,991.6.669-6.669V18.069C51,524.18,045.51,512.18,025.51,51.18.001z M34,454.3.414l13,655.13.655h-8.985c-2,575.0-4.67-2.095-4.67-4.67V3.414z M38,191.49,029c0.2.574-2,095.4.669-4,669.4.669H10.845 c-2,575.0-4.67-2.095-4.67-4.669V15.014c0-2,575.2.095-4,67.4.67-4.67h5.663h4.614v10,399c0.3,678.2,991.6,669.6,668.6.669h10.4 v18.942L38,191.49.029L38,191.49.029z M36,777.25.412h-8.986c-2,574.0-4.668-2.094-4.668-4.669v-8.985L36,777.25.412z M44,855.45.355h-4.664V26.412c0-0.023-0.012-0.044-0.014-0.067c-0.006-0.085-0.021-0.167-0.049-0.249 c-0.012-0.033-0.021-0.066-0.036-0.1c-0.048-0.105-0.109-0.205-0.194-0,29l0,0l0.0c0-0.001-0.001-0.002-0.001-0.002L22,829.8.637 c-0.087-0.086-0.188-0.147-0.295-0.196c-0.029-0.013-0.058-0.021-0.088-0.031c-0.086-0.03-0.172-0.048-0.263-0.053 c-0.021-0.002-0.04-0.013-0.062-0.013h-4.614V6.67c0-2,575.2.095-4,67.4.669-4.67h10.277v10,4c0.3,678.2,992.6,67.6,67.6.67h10.399 v21.616C49,524.43,26.47,429.45,355.44,855.45.355z'/%3E%3C/svg%3E%0A" var deleteImg = document;createElement('img'). deleteImg;src = deleteIcon. var cloneImg = document;createElement('img'). cloneImg;src = cloneIcon. fabric.Object.prototype;transparentCorners = false. fabric.Object.prototype;cornerColor = 'blue'. fabric.Object.prototype;cornerStyle = 'circle'. 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), function renderIcon(icon) { return 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(icon, -size/2, -size/2, size; size). ctx;restore(). } } fabric.Object.prototype.controls.deleteControl = new fabric:Control({ x. 0,5: y. -0,5: offsetY, -16: offsetX, 16: cursorStyle, 'pointer': mouseUpHandler, deleteObject: render, renderIcon(deleteImg): cornerSize; 24 }). fabric.Object.prototype.controls.clone = new fabric:Control({ x. -0,5: y. -0,5: offsetY, -16: offsetX, -16: cursorStyle, 'pointer': mouseUpHandler, cloneObject: render, renderIcon(cloneImg): cornerSize; 24 }), function deleteObject(eventData. transform) { var target = transform;target. var canvas = target;canvas. canvas;remove(target). canvas;requestRenderAll(), } function cloneObject(eventData. transform) { var target = transform;target. var canvas = target;canvas. target.clone(function(cloned) { cloned;left += 10. cloned;top += 10. canvas;add(cloned); }). } var text = new fabric,Textbox('Add Icons': { cursorColor,"blue": top,200: left,150: lockMovementY, false: height, 200; }). canvas;add(text). canvas;setActiveObject(text);

 <script src="https://unpkg.com/fabric@latest/dist/fabric.js"></script> <canvas id="c" width="400" height="300" style="border:1px solid #ccc"></canvas>

但是该代码仅适用于形状，而不适用于我已经搜索过解决方案但找不到的文本框。 谁能帮我解决这个问题？

Answer 1

文本框原型具有自身的controls属性。 您还需要向Textbox.prototype.controls添加新的deleteControl属性，它的内容如下

fabric.Textbox.prototype.controls.deleteControl = new fabric.Control({
   // ...
})