自动将SVG缩放到其父级 [英] Automatically scale an SVG to its parent
问题描述
我正在尝试使SVG自动缩小并垂直放入其父容器中.
I'm trying to get an SVG to automatically scale down and fit vertically into its parent container.
SVG具有签名，我希望它可以垂直缩小以固定到有问题的div中.一旦发生这种情况，div的宽度将始终足够大以容纳其余的svg.
The SVG is of a signature, and I want it to shrink vertically to fix into the div in question. Once this happens the width of the div will always be more than large enough to accommodate the rest of the svg.
我的小提琴在这里，标记在下面.
The fiddle I have is here, and the markup is below.
只是弄乱了它，就像将 viewBox 设置为相等设为"0,0,1100,100"大约是正确的，但我无法一生概括出计算该规则的规则.
Just messing with it, it looks like setting the viewBox equal to "0,0,1100,100" is about right, but I can't for the life of me generalize a rule for calculating that.
<div style="border: 1px solid black; width: 370px; height: 30px; margin: 30px;">
<?xml version="1.0" encoding="UTF-8" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg xmlns="http://www.w3.org/2000/svg" version="1.1"><path fill="none" stroke="#000000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" d="M 1 80 c 0.11 -0.19 3.59 -7.64 6 -11 c 5.2 -7.24 11.51 -13.76 17 -21 c 1.92 -2.53 3 -5.62 5 -8 c 6.6 -7.87 14.55 -15.43 21 -23 c 0.93 -1.09 1.95 -4.23 2 -4 c 0.14 0.71 -0.63 9.58 0 14 c 0.66 4.6 2.28 9.6 4 14 c 1.22 3.11 3 6.5 5 9 c 1.79 2.23 4.59 4.25 7 6 c 1.17 0.85 2.68 1.83 4 2 c 3.55 0.44 8.37 0.86 12 0 c 7.09 -1.67 14.75 -6.24 22 -8 c 4.65 -1.13 15 -1 15 -1"/><path fill="none" stroke="#000000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" d="M 21 52 c 0.12 -0.07 4.58 -3 7 -4 c 3.13 -1.29 6.72 -2.51 10 -3 c 3.14 -0.47 10 0 10 0"/><path fill="none" stroke="#000000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" d="M 108 64 c -0.02 -0.75 -0.75 -28.06 -1 -43 c -0.09 -5.56 -0.26 -10.84 0 -16 c 0.07 -1.33 0.21 -3.74 1 -4 c 2.11 -0.7 7.51 -0.39 11 0 c 2.31 0.26 4.63 1.58 7 2 c 3.27 0.58 6.88 0.08 10 1 c 11.18 3.3 23.97 7.93 34 12 c 1.18 0.48 2.27 1.86 3 3 c 2.16 3.35 4.65 7.3 6 11 c 1.2 3.3 1.61 7.33 2 11 c 0.28 2.63 0.68 5.63 0 8 c -1.82 6.37 -4.98 13.73 -8 20 c -1.21 2.51 -2.98 5.17 -5 7 c -5.02 4.56 -11.2 9.21 -17 13 c -2.67 1.75 -5.93 3.14 -9 4 c -5.08 1.42 -10.52 2.26 -16 3 c -7.11 0.96 -13.85 1.58 -21 2 l -13 0"/><path fill="none" stroke="#000000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" d="M 185 85 c 0.1 -0.26 4.17 -9.78 6 -15 c 2.97 -8.48 4.86 -16.77 8 -25 c 2.24 -5.89 5.71 -11.27 8 -17 c 1.01 -2.51 1.01 -6.02 2 -8 c 0.43 -0.86 2.4 -2.3 3 -2 c 1.31 0.65 3.69 3.81 5 6 c 3.61 6.01 7.11 12.56 10 19 c 1.4 3.13 2.26 6.59 3 10 c 0.93 4.3 0.84 8.79 2 13 c 3.16 11.44 11 34 11 34"/><path fill="none" stroke="#000000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" d="M 247 78 c 0.04 -0.05 2 -2.16 2 -3 c 0 -1.04 -1.01 -3.46 -2 -4 c -2.03 -1.11 -6.17 -0.95 -9 -2 c -6.05 -2.24 -11.84 -5.89 -18 -8 c -6.45 -2.21 -13.17 -3.73 -20 -5 c -7.69 -1.43 -23 -3 -23 -3"/><path fill="none" stroke="#000000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" d="M 280 87 c 0.04 -0.32 1.03 -11.97 2 -18 c 0.72 -4.44 2.28 -8.54 3 -13 c 1.31 -8.08 1.67 -16.57 3 -24 c 0.25 -1.37 1.71 -2.7 2 -4 c 0.32 -1.46 -0.11 -5.14 0 -5 c 0.2 0.27 2.38 6.09 3 9 c 0.33 1.54 -0.35 3.42 0 5 c 3.87 17.56 11.56 49.11 13 54 c 0.09 0.32 1.93 -1.97 2 -3 c 0.8 -11.75 -0.18 -27.39 1 -41 c 0.82 -9.44 3.67 -24.16 5 -28 c 0.21 -0.6 3.43 0.92 4 2 c 4.46 8.42 9.16 21.76 14 32 c 0.69 1.47 2.39 2.63 3 4 c 0.62 1.4 0.27 3.58 1 5 c 4.32 8.37 10.8 17.06 15 26 c 3.4 7.25 8 23 8 23"/></svg>
</div>
推荐答案
为使svg缩放以起作用，您绝对必须提供与包含元素的边界框匹配的viewBox.在您的情况下，类似于viewBox="0 0 360 100".
For scaling of an svg to work, you absolutely have to supply a viewBox which matches the bounding box of the contained elements. In your case that would be something like viewBox="0 0 360 100".
可以通过javascript计算边界框，但是正如我所阅读的，getBBox()方法在某些情况下是有问题的.我无法对此进一步评论，但是在这种情况下以及在chrome上都可以，请参见: http://jsfiddle .net/3v4e4/7/
The bounding box can be calculated via javascript, but as I have read the getBBox() method is buggy in some cases. I can't comment further on that, but in this case and on chrome it works, see: http://jsfiddle.net/3v4e4/7/
请注意，getBBox()和setAttribute()都是本机方法，对于设置viewBox，您绝对必须使用这些方法.使用jQuery的.attr()方法将不起作用，因为SVG DOM与jquery专为HTML DOM设计的HTML DOM不同: http://keith-wood.name/svg.html#dom
Note that both getBBox() and setAttribute() are native methods and for setting the viewBox you absolutely have to use these. Using the jquery ´.attr()` method will not work as the SVG DOM is different from the HTML DOM which jquery is designed for: http://keith-wood.name/svg.html#dom
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