Gist contains a javaScript file svgDraw.js for connecting any vertically aligned html elements with an SVG path in a pipe-like fashion.
Also, index.html, and style.css are provided for demonstration purposes.
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Connect two vertical aligned elements / draw a path between two elements with SVG path (using jQuery)
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Vertically connect divs with SVG path</title> | |
| <link rel="stylesheet" type="text/css" href="style.css"> | |
| <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script> | |
| </head> | |
| <body> | |
| <div id="svgContainer"></div> | |
| <div id= "outer"> | |
| <div id="purple"></div> | |
| <div id="teal"></div> | |
| <div id="purple2"></div> | |
| <div id="teal2"></div> | |
| </div> | |
| <script src="svgDraw.js"></script> | |
| </body> | |
| </html> |
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| body { | |
| margin: 0; | |
| } | |
| #svgContainer { | |
| z-index: -1; | |
| position: absolute; | |
| width: 100%; | |
| height: 100%; | |
| opacity: 1; | |
| } | |
| #svgContainer > svg { | |
| width: 100%; | |
| height: 100%; | |
| } | |
| #outer { | |
| margin: 0; | |
| } | |
| #teal { | |
| width: 8em; | |
| height:8em; | |
| background-color:teal; | |
| margin-left: 30%; | |
| margin-top: 0em; | |
| } | |
| #purple { | |
| width: 8em; | |
| height: 8em; | |
| background-color:purple; | |
| margin-top: 0em; | |
| } | |
| #teal2 { | |
| width: 8em; | |
| height:8em; | |
| background-color:teal; | |
| margin-left: 30%; | |
| margin-top: -16em; | |
| } | |
| #purple2 { | |
| width: 8em; | |
| height: 8em; | |
| background-color:purple; | |
| margin-top: 10em; | |
| } |
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| function signum(x) { | |
| return (x < 0) ? -1 : 1; | |
| } | |
| function absolute(x) { | |
| return (x < 0) ? -x : x; | |
| } | |
| function drawPath(svg, path, startX, startY, endX, endY) { | |
| // how smooth corners | |
| var deltaX = (endX - startX) * 0.07; | |
| var delta = absolute(deltaX); | |
| var arc1 = 0; | |
| var arc2 = 1; | |
| var swap = 1; | |
| if (startY > endY) { | |
| swap = -1; | |
| arc1 = 1; | |
| arc2 = 0; | |
| delta = -1*delta; | |
| } | |
| if (startY === endY) { | |
| delta = 0; | |
| } | |
| var space = 15; | |
| // draw tha pipe-like path | |
| path.attr("d", "M" + startX + " " + startY + | |
| " H" + (endX - space - (swap*delta)) + | |
| " A" + delta + " " + delta + " 0 0 " + arc2 + " " + (endX - space) + " " + (startY + delta) + | |
| " V" + (endY - delta) + | |
| " A" + delta + " " + delta + " 0 0 " + arc1 + " " + (endX - space + (swap*delta)) + " " + endY + | |
| " H" + endX | |
| ); | |
| } | |
| function connectElements(svg, path, startElem, endElem) { | |
| var svgContainer= $("#svgContainer"); | |
| // get (top, right) corner coordinates of the svg container | |
| var svgTop = svgContainer.offset().top; | |
| var svgLeft = svgContainer.offset().left; | |
| // get (top, left) coordinates for the two elements | |
| var startCoord = startElem.offset(); | |
| var endCoord = endElem.offset(); | |
| // calculate path's start (x,y) coords | |
| var startX = startCoord.left + startElem.outerWidth() - svgLeft; | |
| var startY = startCoord.top + 0.5*startElem.outerHeight() - svgTop; | |
| // calculate path's end (x,y) coords | |
| var endX = endCoord.left - svgLeft; | |
| var endY = endCoord.top + 0.5*endElem.outerHeight() - svgTop; | |
| // call function for drawing the path | |
| drawPath(svg, path, startX, startY, endX, endY); | |
| } | |
| function $svgPath(id) { | |
| return $(document.createElementNS('http://www.w3.org/2000/svg', 'path')) | |
| .attr({ | |
| 'id': id, | |
| 'stroke-width': '4px', | |
| 'fill' : 'none', | |
| 'stroke' : '#000', | |
| 'd' : 'M0 0' | |
| }) | |
| .css('fill', 'none'); | |
| } | |
| function $svg(id) { | |
| return $(document.createElementNS('http://www.w3.org/2000/svg', 'svg')).attr('id', id); | |
| } | |
| function connectAll() { | |
| // connect all the paths | |
| $('#svgContainer').append($svg('svg1')); | |
| $("#svg1").append($svgPath("path1")); | |
| $("#svg1").append($svgPath("path2")); | |
| connectElements($("#svg1"), $("#path1"), $("#purple"), $("#teal")); | |
| connectElements($("#svg1"), $("#path2"), $("#purple2"), $("#teal2")); | |
| } | |
| $(document).ready(function() { | |
| // reset svg each time | |
| connectAll(); | |
| }); | |
| $(window).resize(function () { | |
| // reset svg each time | |
| connectAll(); | |
| }); |
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