将键盘事件附加到HTML中的SVG元素

有没有办法在浏览器中运行SVG内部的SVG元素时,将textInput或按键(或者其他任何文本输入)事件附加到SVG元素上?

我可以将一个事件处理程序附加到document.documentElement,但是当我通过任何机制将事件处理程序附加到任何类型的SVGElement时,没有任何反应... svg,g,rect ...

我从SVG规范看到这不被支持(W3 SVG事件列表),但是任何浏览器是否支持任何“额外”?

我无法得到以下工作在Chrome或Firefox上...

        <!DOCTYPE HTML>
<html>
<head>
<title>Key event test</title>
<style type="text/css">
body,html {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    background: #f00;
}

#main {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 80%;
    background: #0f0;
    float: right;
}

#drawArea {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    background: #ffffff;
}

#side {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 20%;
    background: #00f;
    float: left;
}


</style>
<script type="text/javascript">

    function createBoundEventHandler(el, name) {
        var f = 
            function eventHandler(ev) {
    if("mousedown" === ev.type) {
        el.focus();
    }
    else {
        alert("asEventHandler: " + el.localName + " " + name + " " + ev.type);
    }
    return true;
            };
        return f;
    }

    function doEvent(event, elementName, eventName) {
        alert("asAttribute: " + elementName + " " + eventName + " " + event.type);
        return true;
    }

    function addEventHandler(element, eventName, type) {
        var attrName = "on" + eventName;
        var attrValue = "doEvent(evt, '" + element.localName + "', '" + eventName + "')";
        if("asAttribute" === type) {
            element.setAttribute( attrName, attrValue);
        }
        else {
            element.addEventListener(eventName, createBoundEventHandler(element, eventName), false);
        }
    }

    window.onload = function() { 
        var eventHandlerType = "asEventHandler"; //asAttribute asEventHandler

        var svgTarget = document.getElementById('drawArea');
        var svgRect = document.getElementById('aRect');
        var nonSVG = document.getElementById('side');

        addEventHandler(svgTarget, "keypress", eventHandlerType);
        addEventHandler(svgTarget, "mousedown", eventHandlerType);
        addEventHandler(svgTarget, "keyup", eventHandlerType);
        addEventHandler(svgTarget, "keydown", eventHandlerType);

        addEventHandler(svgRect, "keypress", eventHandlerType);
        addEventHandler(svgRect, "mousedown", eventHandlerType);
        addEventHandler(svgRect, "keyup", eventHandlerType);
        addEventHandler(svgRect, "keydown", eventHandlerType);

        addEventHandler(nonSVG, "keypress", eventHandlerType);
        addEventHandler(nonSVG, "mousedown", eventHandlerType);
        addEventHandler(nonSVG, "keyup", eventHandlerType);
        addEventHandler(nonSVG, "keydown", eventHandlerType);

        //We can get a keypress if we attach an event handler to the underlying document Element    
        addEventHandler(document.documentElement, "keypress", eventHandlerType);
    }
</script>
</head>
<body>
    <div id="side" tabindex="0">
    </div>
<div id="main">
    <svg  version="1.1" xmlns="http://www.w3.org/2000/svg" id="drawArea" focusable="true" tabindex="0"> 
    <rect x="0" y="0" width="100" height="100"
            style="fill:yellow; ;stroke-width:2; stroke:rgb(0,0,0)" id="aRect" focusable="true"/>
    </svg>
</div>
</body>
</html>

如示例所示,我仍然可以对“背景”doc元素上的关键事件进行回退。 有没有人有任何宠物图书馆,将这个问题与SVGElement联系起来。

注意我也试过tabindex(0),并且没有效果......

谢谢...


一个简单的答案可能是这些浏览器不支持“可聚焦”属性。 对于例如<rect>关键事件侦听器来说,有必要在svg中有一个焦点概念。


正如用户ErikDahlström所建议的那样,您(第一个)需要添加一个焦点事件监听器。

svgRect.addEventListener('focus', function(){
    this.addEventListener('keypress',function(e){
        console.log(e.keyCode);
    });
}, svgRect);

Tudormi的代码工作正常,但要小心memmoryleaks,因为每次你关注svgRect时,新的按键事件都会在该元素上注册。

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