我正在工作的Web应用程序中有一个功能,允许用Raphael.js库将DIV内的图像替换为完全相同的SVG。
以下是包含图像的HTML元素示例:
<div id="ow-0" reference="0" class="object-wrapper" style="z-index: 3; width: 231px; left: 116px; top: 217px; outline: rgb(0, 0, 0) solid 1px; ">
<img id="o-0" reference="0" class="object image" src="image-gallery/intermediate/3295094303_2b50e5fe03_z.jpg" />
</div>
当调用名为addSVG()
的方法时,图像父级div
被设置为Raphael对象paper
,并且在原始图像隐藏后,将包含添加图像的SVG添加到其中:
// Create the SVG and add it to the Viewport
this.addSVG = function(){
// Hide the HTML element before replacing it with the SVG
$("#o-"+this.ref).hide();
// Create the "paper" (svg canvas) before embedding the actual SVG
this.canvas = new Raphael(document.getElementById("ow-"+this.ref), this.width, this.height);
if (this.type=="image" || this.type=="QR"){
this.svg = this.canvas.image(this.src,0,0,this.width,this.height);
}
else {
}
}
几乎所有东西都很完美,除了svg的定位稍微向左偏移了0.5像素(这显然很烦人)。下面是操作后生成的HTML代码:
<div id="ow-0" reference="0" class="object-wrapper" style="z-index: 3; width: 231px; left: 116px; top: 217px; outline: rgb(0, 0, 0) solid 1px; ">
<svg style="overflow: hidden; position: relative; left: -0.5px; " height="170" version="1.1" width="231" xmlns="http://www.w3.org/2000/svg">
<desc style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); ">Created with Raphaël 2.1.0</desc>
<defs style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); "></defs>
<image style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); " x="0" y="0" width="231" height="170" preserveAspectRatio="none" xlink:href="image-gallery/intermediate/3295094303_2b50e5fe03_z.jpg"></image>
</svg>
<img id="o-0" reference="0" class="object image" src="image-gallery/intermediate/3295094303_2b50e5fe03_z.jpg" style="display: none; ">
</div>
为什么会添加-0.5像素,我该如何避免这种情况发生? 顺便说一下,我试着调整了浏览器窗口大小,这时候就不再添加-0.5像素了...