SVG拖動繪製矩形程式碼例項
分享一段程式碼例項,通過拖動就可以繪製一個矩形。
程式碼例項如下:
[HTML] 純文字檢視 複製程式碼執行程式碼<!doctype html> <html> <head> <meta charset="utf-8"> <meta name="author" content="http://www.softwhy.com/" /> <title>螞蟻部落</title> <style> body{ margin:0; padding:0; overflow:hidden; } svg{ position:absolute; width:100%; height:100%; left:0; top:0; } path{ fill:none; stroke:red; } </style> <script> window.onload = function() { var svg = document.querySelector("svg"); svg.setAttribute("width", innerWidth); svg.setAttribute("height", innerHeight); var rect; svg.addEventListener("mousedown", function(e) { rect = document.createElementNS(this.namespaceURI, "path"); rect._d = "M" + e.clientX + "," + e.clientY; rect._d2 = "H" + e.clientX + "Z"; this.appendChild(rect); }, false); svg.addEventListener("mousemove", function(e) { if (rect) { var d = rect._d + "H" + e.clientX + "V" + e.clientY + rect._d2; rect.setAttribute("d", d); } }, false); svg.addEventListener("mouseup", function(e) { rect = null; }, false); svg.addEventListener("mouseleave", function(e) { rect = null; }, false); } </script> </head> <body> <svg></svg> </body> </html>
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