getBoundingClientRect返回错误的结果

时间：2015-03-10 14:41:32

标签： javascript html css d3.js

我正在努力确定DOM中元素的当前位置和大小。我已经整理了一个片段来说明屏幕右侧的基于卡片的系统。

我尝试构建的行为是，当您点击其中一张卡片时，会添加另一张卡片（最终位于下方，但现在位于顶部），这将会飞到左上角在填充可用空间之前的屏幕。

＆＃13;
＆＃13; 
d3.selectAll("attribute-card").on("click", function (d) {

   var rect = this.getBoundingClientRect();
   var card = d3.select("body")
          .append("div")
            .attr("class", "card")
            .style("background", "transparent")
            .style("border", "thin solid red")
            .style("left", rect.left + "px")
            .style("top", rect.top + "px")
            .style("width", (rect.right - rect.left) + "px")
            .style("height", (rect.bottom - rect.top) + "px")
            .style("position", "absolute");
});
＆＃13; 
html {
  height: 100%;
  margin: 0;
  font-family: Arial;
  overflow: hidden;
}
body {
  height: 100%;
}
svg {
  background: #2c272b;
  width: 100%;
  height: 100%;
}
.radial-menu .segment {
  fill: #3b3944;
}
.radial-menu .segment:hover {
  fill: #535060;
}
.radial-menu .symbol {
  pointer-events: none;
  fill: white;
}
.radial-menu .symbol.icon {
  font-family: 'FontAwesome';
}
.beam {
  stroke: #fff;
}
.planet circle {
  fill: #399745;
  stroke: #3b3944;
  stroke-width: 0;
  stroke-dasharray: 33,11;
}
.planet .related {
  fill: none;
  stroke: #3b3944;
  stroke-dasharray: none;
  stroke-width: 25px;
}
.planet text {
  fill: #000;
  opacity: 0.4;
  text-anchor: middle;
  pointer-events: none;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.planet .name {
  font-size: 2.5em;
  width: 94%;
  margin: 125px 0px 0px 10px;
}
.planet.selected text {
  fill: white;
  opacity: 1;
}
.planet.focused text {
  fill: white;
  opacity: 1;
}
.moon circle {
  fill: #3b3944;
}
.moon:hover {
  fill: #535060;
}
.moon text {
  fill: white;
  text-anchor: middle;
  pointer-events: none;
}
.gravity {
  stroke: #3b3944;
  fill: #3b3944;
  stroke-linecap: round;
  stroke-width: 2px;
}
.card-list {
  background: #2c272b;
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  min-height: 100%;
  opacity: 1;
}
.card {
  background: #dedede;
  border: 2px solid #ebebeb;
  margin: 5px 5px 5px 5px;
  border-radius: 8px;
  padding: 5px 15px 5px 15px;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.card .title {
  font-weight: bold;
}
.card .summary {
  color: #cc8b11;
  font-weight: bold;
  font-size: 12px;
}
.card .summary .summary-item {
  margin: 0;
}
/*# sourceMappingURL=style.css.map */
＆＃13; 
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<html><head>
    <meta charset="utf-8">
    <meta name="msapplication-tap-highlight" content="no">
    <title name="Business Landscape Explorer Prototype"></title>
    <link href="bootstrap.min.css" rel="stylesheet">
    <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
    <link rel="stylesheet" type="text/css" href="styles/style.css">
    <script src="d3.v3.js" charset="utf-8"></script><style type="text/css"></style>
</head>
<body>
    
    <div id="card-list" class="card-list">
        <div id="attributes" class="attribute-list" data-bind="foreach: attributes">
            <attribute-card params="value: $data"><div class="card attribute-card">                    <p class="title" data-bind="text: name">Name</p>                    <div class="summary" data-bind="foreach: summaries"></div>                </div></attribute-card>
        
            <attribute-card params="value: $data"><div class="card attribute-card">                    <p class="title" data-bind="text: name">Cost</p>                    <div class="summary" data-bind="foreach: summaries">                        <p class="summary-item" data-bind="text: $data">Average: £9 million</p>                                            <p class="summary-item" data-bind="text: $data">Total: £2,700 million</p>                    </div>                </div></attribute-card>
        
            <attribute-card params="value: $data"><div class="card attribute-card">                    <p class="title" data-bind="text: name">Start Date</p>                    <div class="summary" data-bind="foreach: summaries">                        <p class="summary-item" data-bind="text: $data">Earliest: 31st Jan 2007</p>                                            <p class="summary-item" data-bind="text: $data">Latest: 27th Nov 2019</p>                    </div>                </div></attribute-card>
        
            <attribute-card params="value: $data"><div class="card attribute-card">                    <p class="title" data-bind="text: name">Enabled</p>                    <div class="summary" data-bind="foreach: summaries">                        <p class="summary-item" data-bind="text: $data">True: 71%</p>                                            <p class="summary-item" data-bind="text: $data">False: 29%</p>                    </div>                </div></attribute-card>
        
            <attribute-card params="value: $data"><div class="card attribute-card">                    <p class="title" data-bind="text: name">Status</p>                    <div class="summary" data-bind="foreach: summaries">                        <p class="summary-item" data-bind="text: $data">Red: 11%</p>                                            <p class="summary-item" data-bind="text: $data">Amber: 36%</p>                                            <p class="summary-item" data-bind="text: $data">Green: 41%</p>                    </div>                </div></attribute-card>
        </div>
    </div>

    </body></html>
＆＃13;
＆＃13;
＆＃13;

我正在做的是相当基本的，抓住点击的元素，测量它的边界矩形并向body添加一个具有相同大小和位置的新元素：

d3.selectAll("attribute-card").on("click", function (d) {

   var rect = this.getBoundingClientRect();
   var card = d3.select("body")
          .append("div")
            .attr("class", "card")
            .style("background", "transparent")
            .style("border", "thin solid red")
            .style("left", rect.left + "px")
            .style("top", rect.top + "px")
            .style("width", (rect.right - rect.left) + "px")
            .style("height", (rect.bottom - rect.top) + "px")
            .style("position", "absolute");
});

我一直在阅读有关getBoundingClientRect()的文章，它似乎根据规范做了我想做的事情，它只是没有按照我的预期做到这一点，因为宽度/高度都是关闭，Firefox甚至不能让左边正确。这个功能是简单的破坏（这会让我感到惊讶）还是我的一些CSS以某种方式破坏了这个原生功能？

我应该在这里添加一个在不同浏览器中关闭结果的屏幕截图。 IE是迄今为止最接近的，但似乎仍然与底部/右侧值相悖。

enter image description here

2 个答案:

答案 0 :(得分：9)

嗯，我非常困惑，但设法让事情按照我的意愿运作。我改变了计算，考虑了基于一点猜测工作的填充，边距和边框，并修改了一些样式以验证它仍然有效。这给了我以下计算：

    var rect = element.getBoundingClientRect();
    rect = {
        left: rect.left - margin.left,
        right: rect.right - margin.right - padding.left - padding.right,
        top: rect.top - margin.top,
        bottom: rect.bottom - margin.bottom - padding.top - padding.bottom - border.bottom  
    };
    rect.width = rect.right - rect.left;
    rect.height = rect.bottom - rect.top;
    return rect;

奇怪的是，当我尝试将其插入我的应用程序时，它根本不起作用。取出一些填充物并最终得到：

rect = {
        left: rect.left - margin.left,
        right: rect.right - border.right,
        top: rect.top - margin.top,
        bottom: rect.bottom - border.bottom - border.top
    };
    rect.height = rect.bottom - rect.top;
    rect.width = rect.right - rect.left;
    return rect;


function getBoundingRect(element) {

    var style = window.getComputedStyle(element); 
    var margin = {
        left: parseInt(style["margin-left"]),
        right: parseInt(style["margin-right"]),
        top: parseInt(style["margin-top"]),
        bottom: parseInt(style["margin-bottom"])
    };
    var padding = {
        left: parseInt(style["padding-left"]),
        right: parseInt(style["padding-right"]),
        top: parseInt(style["padding-top"]),
        bottom: parseInt(style["padding-bottom"])
    };
    var border = {
        left: parseInt(style["border-left"]),
        right: parseInt(style["border-right"]),
        top: parseInt(style["border-top"]),
        bottom: parseInt(style["border-bottom"])
    };
    
    
    var rect = element.getBoundingClientRect();
    rect = {
        left: rect.left - margin.left,
        right: rect.right - margin.right - padding.left - padding.right,
        top: rect.top - margin.top,
        bottom: rect.bottom - margin.bottom - padding.top - padding.bottom - border.bottom  
    };
    rect.width = rect.right - rect.left;
    rect.height = rect.bottom - rect.top;
    return rect;
    
};

d3.selectAll(".card").on("click", function (d) {

   var rect = getBoundingRect(this);
    
   var card = d3.select("body")
          .append("div")
            .attr("class", "card")
            .style("background", "transparent")
            .style("border", "thin solid red")
            .style("left", rect.left + "px")
            .style("top", rect.top + "px")
            .style("width", rect.width + "px")
            .style("height", rect.height + "px")
            .style("position", "absolute");
});
html {
  height: 100%;
  margin: 0;
  font-family: Arial;
  overflow: hidden;
}
body {
  height: 100%;
}
svg {
  background: #2c272b;
  width: 100%;
  height: 100%;
}
.radial-menu .segment {
  fill: #3b3944;
}
.radial-menu .segment:hover {
  fill: #535060;
}
.radial-menu .symbol {
  pointer-events: none;
  fill: white;
}
.radial-menu .symbol.icon {
  font-family: 'FontAwesome';
}
.beam {
  stroke: #fff;
}
.planet circle {
  fill: #399745;
  stroke: #3b3944;
  stroke-width: 0;
  stroke-dasharray: 33,11;
}
.planet .related {
  fill: none;
  stroke: #3b3944;
  stroke-dasharray: none;
  stroke-width: 25px;
}
.planet text {
  fill: #000;
  opacity: 0.4;
  text-anchor: middle;
  pointer-events: none;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.planet .name {
  font-size: 2.5em;
  width: 94%;
  margin: 125px 0px 0px 10px;
}
.planet.selected text {
  fill: white;
  opacity: 1;
}
.planet.focused text {
  fill: white;
  opacity: 1;
}
.moon circle {
  fill: #3b3944;
}
.moon:hover {
  fill: #535060;
}
.moon text {
  fill: white;
  text-anchor: middle;
  pointer-events: none;
}
.gravity {
  stroke: #3b3944;
  fill: #3b3944;
  stroke-linecap: round;
  stroke-width: 2px;
}
.card-list {
  background: #2c272b;
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  min-height: 100%;
  opacity: 1;
}
.card {
  background: #dedede;
  border: 2px solid #ebebeb;
  margin: 5px 5px 5px 5px;
  border-radius: 8px;
  padding: 5px 15px 5px 15px;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.card .title {
  font-weight: bold;
}
.card .summary {
  color: #cc8b11;
  font-weight: bold;
  font-size: 12px;
}
.card .summary .summary-item {
  margin: 0;
}
/*# sourceMappingURL=style.css.map */
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<html><head>
    <meta charset="utf-8">
    <meta name="msapplication-tap-highlight" content="no">
    <title name="Business Landscape Explorer Prototype"></title>
    <link href="bootstrap.min.css" rel="stylesheet">
    <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
    <link rel="stylesheet" type="text/css" href="styles/style.css">
    <script src="d3.v3.js" charset="utf-8"></script><style type="text/css"></style>
</head>
<body>
    
    <div id="card-list" class="card-list">
        <div id="attributes" class="attribute-list" data-bind="foreach: attributes">
            <attribute-card params="value: $data"><div class="card attribute-card">                    <p class="title" data-bind="text: name">Name</p>                    <div class="summary" data-bind="foreach: summaries"></div>                </div></attribute-card>
        
            <attribute-card params="value: $data"><div class="card attribute-card">                    <p class="title" data-bind="text: name">Cost</p>                    <div class="summary" data-bind="foreach: summaries">                        <p class="summary-item" data-bind="text: $data">Average: £9 million</p>                                            <p class="summary-item" data-bind="text: $data">Total: £2,700 million</p>                    </div>                </div></attribute-card>
        
            <attribute-card params="value: $data"><div class="card attribute-card">                    <p class="title" data-bind="text: name">Start Date</p>                    <div class="summary" data-bind="foreach: summaries">                        <p class="summary-item" data-bind="text: $data">Earliest: 31st Jan 2007</p>                                            <p class="summary-item" data-bind="text: $data">Latest: 27th Nov 2019</p>                    </div>                </div></attribute-card>
        
            <attribute-card params="value: $data"><div class="card attribute-card">                    <p class="title" data-bind="text: name">Enabled</p>                    <div class="summary" data-bind="foreach: summaries">                        <p class="summary-item" data-bind="text: $data">True: 71%</p>                                            <p class="summary-item" data-bind="text: $data">False: 29%</p>                    </div>                </div></attribute-card>
        
            <attribute-card params="value: $data"><div class="card attribute-card">                    <p class="title" data-bind="text: name">Status</p>                    <div class="summary" data-bind="foreach: summaries">                        <p class="summary-item" data-bind="text: $data">Red: 11%</p>                                            <p class="summary-item" data-bind="text: $data">Amber: 36%</p>                                            <p class="summary-item" data-bind="text: $data">Green: 41%</p>                    </div>                </div></attribute-card>
        </div>
    </div>

    </body></html>

答案 1 :(得分：0)

我遇到了同样的问题，但在我的情况下，有时矩形都被固定数目的像素均等地偏移。我发现body节点本身可以​​相对于视口有一些偏移，在将任何元素附加到body时都应该对其进行调整。请参见以下代码：

d3.selectAll("attribute-card").on("click", function (d) {

   var bodyRect = document.body.getBoundingClientRect(); // Get potential offset of the page's body node
   var rect = this.getBoundingClientRect(); // This gives coordinates relative to the viewport, not relative to the body's origin
   var card = d3.select("body")
          .append("div")
            .attr("class", "card")
            .style("background", "transparent")
            .style("border", "thin solid red")
            .style("left", (rect.left - bodyRect.left) + "px") // Correct for the body's offset
            .style("top", (rect.top - bodyRect.top) + "px") // Correct for the body's offset
            .style("width", (rect.right - rect.left) + "px")
            .style("height", (rect.bottom - rect.top) + "px")
            .style("position", "absolute");
});
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