【问题标题】:adding stroke to google chart将笔划添加到谷歌图表
【发布时间】:2013-05-28 08:17:33
【问题描述】:

我创建了一个谷歌面积图,并给出了 5 的 pointSize 作为我的截图如下。

有没有办法在我的点上添加笔触,如下图所示。

【问题讨论】:

    标签: javascript google-visualization


    【解决方案1】:

    是的,但这很棘手。

    执行摘要

    只需创建一个脚本,即可在可视化div 中创建的svg 中查找所有<circle> 元素。

    对于所有这些圆圈,找到stroke 属性并将其设置为您想要的任何颜色(在您的示例中为#000000),并将stroke-width 属性设置为您想要的任何线宽(Google Visualization 的默认值是2 用于折线图)。

    禁用图表交互,使其保持这种状态。

    详细说明

    让我们从一些简单的代码开始:

    function drawVisualization() {
      // Some raw data (not necessarily accurate)
      var data = google.visualization.arrayToDataTable([
        ['Series ID', 'Value'],
        ['A', 165],
        ['B', 135],
        ['C', 157],
        ['D', 139],
        ['E', 136]
      ]);
    
      // Create and draw the visualization.
      var ac = new google.visualization.AreaChart(document.getElementById('visualization'));
      ac.draw(data, {
        isStacked: true,
        width: 600,
        height: 400,
        pointSize: 10
      });
    }
    

    看起来像这样:

    Google Visualizations 在可视化div 元素内使用以下通用代码结构呈现此对象:

    <div id="visualization" style="width: 600px; height: 400px; position: relative;">
      <div style="position: relative; width: 600px; height: 400px;" dir="ltr">
        <div style="position: absolute; left: 0px; top: 0px; width: 100%; height: 100%;">
          <svg width="600" height="400" style="overflow: hidden;">
            <defs id="defs">
              <clipPath id="_ABSTRACT_RENDERER_ID_0">
                <rect x="115" y="77" width="371" height="247">
              </clipPath>
            </defs>
            <rect x="0" y="0" width="600" height="400" stroke="none" stroke-width="0" fill="#ffffff">
            <g>
              <rect x="499" y="77" width="88" height="13" stroke="none" stroke-width="0" fill-opacity="0" fill="#ffffff">
              <g>
                <rect x="499" y="77" width="88" height="13" stroke="none" stroke-width="0" fill-opacity="0" fill="#ffffff">
                <g>
                  <text text-anchor="start" x="517" y="88.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#222222">Value</text>
                </g>
                <rect x="499" y="77" width="13" height="13" stroke="none" stroke-width="0" fill="#3366cc">
              </g>
            </g>
            <g>
              <rect x="115" y="77" width="371" height="247" stroke="none" stroke-width="0" fill-opacity="0" fill="#ffffff">
              <g clip-path="url(http://savedbythegoog.appspot.com/retrieve_cache?unique_id=b65582b5691907b9b17033f29fdb4c4bfc18e583#_ABSTRACT_RENDERER_ID_0)">
                <g>
                  <rect x="115" y="323" width="371" height="1" stroke="none" stroke-width="0" fill="#cccccc">
                  <rect x="115" y="262" width="371" height="1" stroke="none" stroke-width="0" fill="#cccccc">
                  <rect x="115" y="200" width="371" height="1" stroke="none" stroke-width="0" fill="#cccccc">
                  <rect x="115" y="139" width="371" height="1" stroke="none" stroke-width="0" fill="#cccccc">
                  <rect x="115" y="77" width="371" height="1" stroke="none" stroke-width="0" fill="#cccccc">
                </g>
                <g>
                  <g>
                    <path d="M115.5,323.5L115.5,120.55000000000001L208,157.45L300.5,130.39000000000001L393,152.53L485.5,156.22L485.5,323.5L393,323.5L300.5,323.5L208,323.5L115.5,323.5" stroke="none" stroke-width="0" fill-opacity="0.3" fill="#3366cc">
                  </g>
                </g>
                <g>
                  <rect x="115" y="323" width="371" height="1" stroke="none" stroke-width="0" fill="#333333">
                </g>
                <g>
                  <path d="M115.5,120.55000000000001L208,157.45L300.5,130.39000000000001L393,152.53L485.5,156.22" stroke="#3366cc" stroke-width="2" fill-opacity="1" fill="none">
                </g>
              </g>
              <g>
                <circle cx="115.5" cy="120.55000000000001" r="6" stroke="none" stroke-width="0" fill="#3366cc">
                <circle cx="208" cy="157.45" r="6" stroke="none" stroke-width="0" fill="#3366cc">
                <circle cx="300.5" cy="130.39000000000001" r="6" stroke="none" stroke-width="0" fill="#3366cc">
                <circle cx="393" cy="152.53" r="6" stroke="none" stroke-width="0" fill="#3366cc">
                <circle cx="485.5" cy="156.22" r="6" stroke="none" stroke-width="0" fill="#3366cc">
              </g>
              <g>
                <g>
                  <text text-anchor="middle" x="115.5" y="343.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#222222">A</text>
                </g>
                <g>
                  <text text-anchor="middle" x="208" y="343.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#222222">B</text>
                </g>
                <g>
                  <text text-anchor="middle" x="300.5" y="343.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#222222">C</text>
                </g>
                <g>
                  <text text-anchor="middle" x="393" y="343.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#222222">D</text>
                </g>
                <g>
                  <text text-anchor="middle" x="485.5" y="343.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#222222">E</text>
                </g>
                <g>
                  <text text-anchor="end" x="102" y="328.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#444444">0</text>
                </g>
                <g>
                  <text text-anchor="end" x="102" y="266.55" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#444444">50</text>
                </g>
                <g>
                  <text text-anchor="end" x="102" y="205.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#444444">100</text>
                </g>
                <g>
                  <text text-anchor="end" x="102" y="143.55" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#444444">150</text>
                </g>
                <g>
                  <text text-anchor="end" x="102" y="82.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#444444">200</text>
                </g>
              </g>
            </g>
            <g>
          </svg>
        </div>
      </div>
      <div style="display: none; position: absolute; top: 410px; left: 610px; white-space: nowrap; font-family: Arial; font-size: 13px;">Value</div>
      <div></div>
    </div>
    

    这是很多东西,但总的来说,它的工作方式是:

    1. 容器div(在本例中为“可视化”)
    2. 2 内部div
    3. svg元素

    svg 元素本身通常遵循这种模式:

    1. 整个svg的剪切路径
    2. 第 1 组:标题
    3. 第 2 组:传奇
    4. 第 3 组:图表区域
    5. 第 4 组:轴标签

    视您的图表而定,变化会略有不同(如果您不包含标签,它可能不会生成“标题”组,并且通常如果您更改库,它呈现图表的方式会略有不同. 但是,对于'corecharts' 包,通常一切都会遵循上述)。

    由于您想调整实际的图表区域部分(图中的圆圈),让我们更仔细地研究一下该元素。这是该组的svg

    <g>
      <rect x="115" y="77" width="371" height="247" stroke="none" stroke-width="0" fill-opacity="0" fill="#ffffff">
      <g clip-path="url(http://savedbythegoog.appspot.com/retrieve_cache?unique_id=5c972f534cccaf429927a9b83381537e632ce3f8#_ABSTRACT_RENDERER_ID_0)">
        <g>
          <rect x="115" y="323" width="371" height="1" stroke="none" stroke-width="0" fill="#cccccc">
          <rect x="115" y="262" width="371" height="1" stroke="none" stroke-width="0" fill="#cccccc">
          <rect x="115" y="200" width="371" height="1" stroke="none" stroke-width="0" fill="#cccccc">
          <rect x="115" y="139" width="371" height="1" stroke="none" stroke-width="0" fill="#cccccc">
          <rect x="115" y="77" width="371" height="1" stroke="none" stroke-width="0" fill="#cccccc">
        </g>
        <g>
          <g>
            <path d="M115.5,323.5L115.5,120.55000000000001L208,157.45L300.5,130.39000000000001L393,152.53L485.5,156.22L485.5,323.5L393,323.5L300.5,323.5L208,323.5L115.5,323.5" stroke="none" stroke-width="0" fill-opacity="0.3" fill="#3366cc">
          </g>
        </g>
        <g>
          <rect x="115" y="323" width="371" height="1" stroke="none" stroke-width="0" fill="#333333">
        </g>
        <g>
          <path d="M115.5,120.55000000000001L208,157.45L300.5,130.39000000000001L393,152.53L485.5,156.22" stroke="#3366cc" stroke-width="2" fill-opacity="1" fill="none">
        </g>
      </g>
      <g>
        <circle cx="115.5" cy="120.55000000000001" r="6" stroke="none" stroke-width="0" fill="#3366cc">
        <circle cx="208" cy="157.45" r="6" stroke="none" stroke-width="0" fill="#3366cc">
        <circle cx="300.5" cy="130.39000000000001" r="6" stroke="none" stroke-width="0" fill="#3366cc">
        <circle cx="393" cy="152.53" r="6" stroke="none" stroke-width="0" fill="#3366cc">
        <circle cx="485.5" cy="156.22" r="6" stroke="none" stroke-width="0" fill="#3366cc">
      </g>
      <g>
        <g>
          <text text-anchor="middle" x="115.5" y="343.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#222222">A</text>
        </g>
        <g>
          <text text-anchor="middle" x="208" y="343.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#222222">B</text>
        </g>
        <g>
          <text text-anchor="middle" x="300.5" y="343.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#222222">C</text>
        </g>
        <g>
          <text text-anchor="middle" x="393" y="343.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#222222">D</text>
        </g>
        <g>
          <text text-anchor="middle" x="485.5" y="343.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#222222">E</text>
        </g>
        <g>
          <text text-anchor="end" x="102" y="328.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#444444">0</text>
        </g>
        <g>
          <text text-anchor="end" x="102" y="266.55" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#444444">50</text>
        </g>
        <g>
          <text text-anchor="end" x="102" y="205.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#444444">100</text>
        </g>
        <g>
          <text text-anchor="end" x="102" y="143.55" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#444444">150</text>
        </g>
        <g>
          <text text-anchor="end" x="102" y="82.05" font-family="Arial" font-size="13" stroke="none" stroke-width="0" fill="#444444">200</text>
        </g>
      </g>
    </g>
    

    这个显示:

    1. 矩形(图表区域)
    2. A 组:网格线
    3. B 组:面积图(填充)
    4. C 组:基线(X 轴)
    5. D 组:折线图(折线)
    6. E 组:圆圈(点)
    7. F 组:带有轴标签的子组

    所以我们想专注于那里的 E 组。以下是圆圈的代码:

    <g>
    <circle cx="115.5" cy="120.55000000000001" r="6" stroke="none" stroke-width="0" fill="#3366cc">
    <circle cx="208" cy="157.45" r="6" stroke="none" stroke-width="0" fill="#3366cc">
    <circle cx="300.5" cy="130.39000000000001" r="6" stroke="none" stroke-width="0" fill="#3366cc">
    <circle cx="393" cy="152.53" r="6" stroke="none" stroke-width="0" fill="#3366cc">
    <circle cx="485.5" cy="156.22" r="6" stroke="none" stroke-width="0" fill="#3366cc">
    </g>
    

    最简单的方法就是改变“stroke”元素。

    例如,如果我手动将 stroke-width 更改为 2(与 line-width 相同),并将颜色更改为黑色(如您的示例所示),我会得到:

    <g>
    <circle cx="115.5" cy="120.55000000000001" r="6" stroke="#000000" stroke-width="2" fill="#3366cc">
    <circle cx="208" cy="157.45" r="6" stroke="#000000" stroke-width="2" fill="#3366cc">
    <circle cx="300.5" cy="130.39000000000001" r="6" stroke="#000000" stroke-width="2" fill="#3366cc">
    <circle cx="393" cy="152.53" r="6" stroke="#000000" stroke-width="2" fill="#3366cc">
    <circle cx="485.5" cy="156.22" r="6" stroke="#000000" stroke-width="2" fill="#3366cc">
    </g>
    

    这是它的样子:

    但是这种方法存在一些问题。每当您将鼠标悬停在图表上时,它都会重新绘制 SVG 元素(因为它会突出显示单击的任何圆圈,或者如果单击图例则突出显示所有圆圈),并变成如下所示:

    <g>
    <circle cx="393" cy="152.53" r="8" stroke="#3366cc" stroke-width="1" fill="#ffffff">
    <circle cx="393" cy="152.53" r="6" stroke="none" stroke-width="0" fill="#3366cc">
    </g>
    

    所以它只是在它周围重新绘制了一个更大的圆圈,但这意味着你花哨的格式已经消失了!

    基本上,您需要禁用交互性,或者创建一个即使有额外的圆圈也可以运行的脚本(因为您不希望两个圆圈都以黑色圆圈结束,因为它会超级又大又丑)。

    所以我的建议是寻找半径为 X 的圆圈(其中 X 是页面上的大多数圆圈,平线指向较小的数字),并将所有这些元素存储在大批。然后只需遍历数组,在与图表交互时更改 stroke-widthstroke-color 属性。

    请意识到,您的图表越复杂,这将变得越复杂,因为您正在为所有圈子即时执行此操作。如果图表中有任何其他圆圈,他们将得到相同的处理,或者搞砸数学。这会很糟糕。

    【解决方案2】:

    这是一个简单的解决方案。每个点的样式以编程方式定义。这是通过向具有角色“样式”的数据表添加一列,然后使用简单循环将该样式添加到所有点来完成的。试试 JSFiddle:https://jsfiddle.net/m45z7mmp/

      google.setOnLoadCallback(drawChart);
    
      function drawChart() {
    
        var dataArray = [
          ['X', 'Y', {
            'type': 'string',
            'role': 'style'
          }],
          [1, 3],
          [2, 2.5],
          [3, 3],
          [4, 4],
        ];
    
        for (i = 1; i < dataArray.length; i++) {
          dataArray[i].push('point {stroke-width: 2;  stroke-color: #e97b2c; fill-color: #eeeeee }');
        }
    
        var data = google.visualization.arrayToDataTable(dataArray);
    
        var options = {
          colors: ['#e97b2c'],
          pointSize: 8,
        };
    
        var chart = new google.visualization.AreaChart(document.getElementById('chart_div'));
        chart.draw(data, options);
      }
    

    【讨论】:

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