我有一组复杂的形状在片段中.它们是用React渲染的,但我真的只是在寻找一些关于如何能够放大和缩小这些形状的指针.
我的谷歌搜索失败了,我只能找到图表的例子.
如何放大和缩小这样的复杂结构?
<svg height="767" width="903">
<g class="vx-group vx-tree" transform="translate(20, 70)">
<g class="vx-group" transform="translate(0, 70)">
<g class="vx-group" transform="translate(0, 0)">
<path class="vx-link-vertical" d="M451.5,0C451.5,233.5,451.5,233.5,451.5,467" percent="0.5"
stroke="#f7f7f3" stroke-width="1" stroke-opacity="0.2" fill="none"></path>
</g>
<g class="vx-group" transform="translate(0, 0)">
<g class="vx-group" transform="translate(451.5, 0)" opacity="1">
<g class="vx-group node__container" transform="translate(0, 0)">
<svg class="" x="0" y="0" style="overflow: visible;">
<polygon
points="25.98076211353316,-14.999999999999998 25.98076211353316,14.999999999999998 1.83697019872103e-15,30 -25.98076211353316,14.999999999999998 -25.980762113533157,-15.000000000000004 -5.510910596163089e-15,-30"
class="node__hexagon"></polygon>
</svg>
<g class="vx-group node__business-unit" transform="translate(0, 0)">
<use xlink:href="#icon-BusinessUnit"></use>
</g>
<g class="hierarchy-label__container" transform="translate(0, -40)">
<path class="" d="
M 0.0078125, 5.15625
L 34.64882865137755,25.156249999999996
M -0.9921875, 5.15625
L -34.63320365137754,25.156249999999996
H -65.8515625
a8,8 0 0 1 -8,-8
V -47.15625
a8,8 0 0 1 8,-8 H 65.8515625 a8,8 0 0 1 8,8
L 73.8515625, 17.156249999999996
a8,8 0 0 1 -8,8
L 34.64882865137755, 25.156249999999996
Z
">
</path>
<svg x="0" y="0" style="overflow: visible;">
<text class="hierarchy-label__item__name" width="150" y="-25" x="0" text-anchor="middle"
style="pointer-events: none;">
<tspan x="0" dy="0em">Finance</tspan>
</text>
</svg>
<svg x="0" y="0" style="overflow: visible;">
<text class="hierarchy-label__item__type" width="150" y="-5" x="0" text-anchor="middle"
style="pointer-events: none;">
<tspan x="0" dy="0.71em">Business Unit</tspan>
</text>
</svg>
</g>
</g>
</g>
</g>
</g>
</g>
</svg>
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svg中的缩放是使用viewBox完成的,它结合了缩放和偏移.有一篇很好的文章如何扩展SVG.来自以下文章:
如果您将文档视为画布,则视图框是您希望查看者看到的画布的一部分.
它就像是相机应用程序中的手机屏幕,显示了使用指定比例和偏移观察到的部分场景.
很好的示例演示了什么是viewBox可以在这里找到.
一点点数学和我用鼠标轮实现放大/缩小.此外,还添加了使用鼠标移动和显示比例值的平移.演示如何使用viewBox的示例:
const svgImage = document.getElementById("svgImage");
const svgContainer = document.getElementById("svgContainer");
var viewBox = {x:0,y:0,w:svgImage.getAttribute("width"),h:svgImage.getAttribute("height")};
svgImage.setAttribute('viewBox', `${viewBox.x} ${viewBox.y} ${viewBox.w} ${viewBox.h}`);
const svgSize = {w:svgImage.getAttribute("width"),h:svgImage.getAttribute("height")};
var isPanning = false;
var startPoint = {x:0,y:0};
var endPoint = {x:0,y:0};;
var scale = 1;
svgContainer.onmousewheel = function(e) {
e.preventDefault();
var w = viewBox.w;
var h = viewBox.h;
var mx = e.x;//mouse x
var my = e.y;
var dw = w*Math.sign(e.deltaY)*0.05;
var dh = h*Math.sign(e.deltaY)*0.05;
var dx = dw*mx/svgSize.w;
var dy = dh*my/svgSize.h;
viewBox = {x:viewBox.x+dx,y:viewBox.y+dy,w:viewBox.w-dw,h:viewBox.h-dh};
scale = svgSize.w/viewBox.w;
zoomValue.innerText = `${Math.round(scale*100)/100}`;
svgImage.setAttribute('viewBox', `${viewBox.x} ${viewBox.y} ${viewBox.w} ${viewBox.h}`);
}
svgContainer.onmousedown = function(e){
isPanning = true;
startPoint = {x:e.x,y:e.y};
}
svgContainer.onmousemove = function(e){
if (isPanning){
endPoint = {x:e.x,y:e.y};
var dx = (startPoint.x - endPoint.x)/scale;
var dy = (startPoint.y - endPoint.y)/scale;
var movedViewBox = {x:viewBox.x+dx,y:viewBox.y+dy,w:viewBox.w,h:viewBox.h};
svgImage.setAttribute('viewBox', `${movedViewBox.x} ${movedViewBox.y} ${movedViewBox.w} ${movedViewBox.h}`);
}
}
svgContainer.onmouseup = function(e){
if (isPanning){
endPoint = {x:e.x,y:e.y};
var dx = (startPoint.x - endPoint.x)/scale;
var dy = (startPoint.y - endPoint.y)/scale;
viewBox = {x:viewBox.x+dx,y:viewBox.y+dy,w:viewBox.w,h:viewBox.h};
svgImage.setAttribute('viewBox', `${viewBox.x} ${viewBox.y} ${viewBox.w} ${viewBox.h}`);
isPanning = false;
}
}
svgContainer.onmouseleave = function(e){
isPanning = false;
}
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<span id="zoomValue">1</span>
<div id="svgContainer">
<svg id="svgImage" height="964" width="767">
<g class="vx-group vx-tree" transform="translate(20, 70)">
<g class="vx-group" transform="translate(0, 70)">
<g class="vx-group" transform="translate(0, 0)">
<path class="vx-link-vertical" d="M451.5,0C451.5,233.5,451.5,233.5,451.5,467" percent="0.5" stroke="#f7f7f3" stroke-width="1" stroke-opacity="0.2" fill="none"></path>
</g>
<g class="vx-group" transform="translate(0, 0)">
<g class="vx-group" transform="translate(451.5, 0)" opacity="1">
<g class="vx-group node__container" transform="translate(0, 0)">
<svg class="" x="0" y="0" style="overflow: visible;">
<polygon points="25.98076211353316,-14.999999999999998 25.98076211353316,14.999999999999998 1.83697019872103e-15,30 -25.98076211353316,14.999999999999998 -25.980762113533157,-15.000000000000004 -5.510910596163089e-15,-30" class="node__hexagon"></polygon>
</svg>
<g class="vx-group node__business-unit" transform="translate(0, 0)">
<use xlink:href="#icon-BusinessUnit"></use>
</g>
<g class="hierarchy-label__container" transform="translate(0, -40)">
<path class="" d="
M 0.0078125, 5.15625
L 34.64882865137755,25.156249999999996
M -0.9921875, 5.15625
L -34.63320365137754,25.156249999999996
H -65.8515625
a8,8 0 0 1 -8,-8
V -47.15625
a8,8 0 0 1 8,-8 H 65.8515625 a8,8 0 0 1 8,8
L 73.8515625, 17.156249999999996
a8,8 0 0 1 -8,8
L 34.64882865137755, 25.156249999999996
Z
"></path>
<svg x="0" y="0" style="overflow: visible;">
<text class="hierarchy-label__item__name" width="150" y="-25" x="0" text-anchor="middle" style="pointer-events: none;">
<tspan x="0" dy="0em">Finance</tspan>
</text>
</svg>
<svg x="0" y="0" style="overflow: visible;">
<text class="hierarchy-label__item__type" width="150" y="-5" x="0" text-anchor="middle" style="pointer-events: none;">
<tspan x="0" dy="0.71em">Business Unit</tspan>
</text>
</svg>
</g>
</g>
</g>
</g>
</g>
</g>
</svg>
</div>
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数学:
你可以简单地使用css transform
来缩放svg.将CSStransform-origin
从那里你要"销"缩放原点和使用scale(x)
中transform
在使用与最小值的范围内输入元素上面的例子一样1
,并最大限度地200
从scalling 1%
到200%
:
const slider = document.getElementById("zoomRange");
const zvgZoom = document.getElementById("svgZoom");
const zoomValue = document.getElementById("zoomValue");
slider.oninput = function() {
//console.log('zoom', this.value / 100);
zoomValue.innerText = `${this.value}%`;
zvgZoom.style.transform = `scale(${this.value / 100})`;
}
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#svgContainer {
background-color: #dedede;
}
#svgZoom {
transform-origin: 0% 0%;
}
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<input type="range" min="1" max="200" value="100" class="slider" id="zoomRange">
<span id="zoomValue">100%</span>
<div id="svgContainer">
<svg id="svgZoom" height="767" width="903">
<g class="vx-group vx-tree" transform="translate(20, 70)">
<g class="vx-group" transform="translate(0, 70)">
<g class="vx-group" transform="translate(0, 0)">
<path class="vx-link-vertical" d="M451.5,0C451.5,233.5,451.5,233.5,451.5,467" percent="0.5" stroke="#f7f7f3" stroke-width="1" stroke-opacity="0.2" fill="none"></path>
</g>
<g class="vx-group" transform="translate(0, 0)">
<g class="vx-group" transform="translate(451.5, 0)" opacity="1">
<g class="vx-group node__container" transform="translate(0, 0)">
<svg class="" x="0" y="0" style="overflow: visible;">
<polygon points="25.98076211353316,-14.999999999999998 25.98076211353316,14.999999999999998 1.83697019872103e-15,30 -25.98076211353316,14.999999999999998 -25.980762113533157,-15.000000000000004 -5.510910596163089e-15,-30" class="node__hexagon"></polygon>
</svg>
<g class="vx-group node__business-unit" transform="translate(0, 0)">
<use xlink:href="#icon-BusinessUnit"></use>
</g>
<g class="hierarchy-label__container" transform="translate(0, -40)">
<path class="" d="
M 0.0078125, 5.15625
L 34.64882865137755,25.156249999999996
M -0.9921875, 5.15625
L -34.63320365137754,25.156249999999996
H -65.8515625
a8,8 0 0 1 -8,-8
V -47.15625
a8,8 0 0 1 8,-8 H 65.8515625 a8,8 0 0 1 8,8
L 73.8515625, 17.156249999999996
a8,8 0 0 1 -8,8
L 34.64882865137755, 25.156249999999996
Z
"></path>
<svg x="0" y="0" style="overflow: visible;">
<text class="hierarchy-label__item__name" width="150" y="-25" x="0" text-anchor="middle" style="pointer-events: none;">
<tspan x="0" dy="0em">Finance</tspan>
</text>
</svg>
<svg x="0" y="0" style="overflow: visible;">
<text class="hierarchy-label__item__type" width="150" y="-5" x="0" text-anchor="middle" style="pointer-events: none;">
<tspan x="0" dy="0.71em">Business Unit</tspan>
</text>
</svg>
</g>
</g>
</g>
</g>
</g>
</g>
</svg>
</div>
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