本文實例講述了javascript實現行拖動的方法。分享給大家供大家參考。具體如下：
<!doctype html><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>行拖動</title><script> window.onload = function(){ //綁定事件 var addEvent = document.addEventListener ? function(el,type,callback){ el.addEventListener( type, callback, !1 ); } : function(el,type,callback){ el.attachEvent( "on" + type, callback ); } //判定對樣式的支持 var getStyleName= (function(){ var prefixes = ['', '-ms-','-moz-', '-webkit-', '-khtml-', '-o-']; var reg_cap = /-([a-z])/g; function getStyleName(css, el) { el = el || document.documentElement; var style = el.style,test; for (var i=0, l=prefixes.length; i < l; i++) { test = (prefixes[i] + css).replace(reg_cap,function($0,$1){ return $1.toUpperCase(); }); if(test in style){ return test; } } return null; } return getStyleName; })(); var userSelect = getStyleName("user-select"); //精確獲取樣式 var getStyle = document.defaultView ? function(el,style){ return document.defaultView.getComputedStyle(el, null).getPropertyValue(style) } : function(el,style){ style = style.replace(//-(/w)/g, function($, $1){ return $1.toUpperCase(); }); return el.currentStyle[style]; } var dragManager = { y:0, dragStart:function(e){ e = e || event; var handler = e.target || e.srcElement; if(handler.nodeName === "TD"){ handler = handler.parentNode; dragManager.handler = handler; if(!handler.getAttribute("data-background")){ handler.setAttribute("data-background",getStyle(handler,"background-color")) } //顯示為可移動的狀態 handler.style.backgroundColor = "#ccc"; handler.style.cursor = "move"; dragManager.y = e.clientY; if(typeof userSelect === "string"){ return document.documentElement.style[userSelect] = "none"; } document.unselectable = "on"; document.onselectstart = function(){ return false; } } }, draging:function(e){//mousemove時拖動行 var handler = dragManager.handler; if(handler){ e = e || event; var y = e.clientY; var down = y > dragManager.y;//是否向下移動 var tr = document.elementFromPoint(e.clientX,e.clientY); if(tr && tr.nodeName == "TD"){ tr = tr.parentNode dragManager.y = y; if( handler !== tr){ tr.parentNode.insertBefore(handler, (down ? tr.nextSibling : tr)); } }; } }, dragEnd:function(){ var handler = dragManager.handler if (handler) { handler.style.backgroundColor = handler.getAttribute("data-background"); handler.style.cursor = "default"; dragManager.handler = null; } if(typeof userSelect === "string"){ return document.documentElement.style[userSelect] = "text"; } document.unselectable = "off"; document.onselectstart = null; }, main:function(el){ addEvent(el,"mousedown",dragManager.dragStart); addEvent(document,"mousemove",dragManager.draging); addEvent(document,"mouseup",dragManager.dragEnd); } } var el = document.getElementById("table"); dragManager.main(el); }</script><style>.table{width:60%;border: 1px solid red;border-collapse: collapse;}.table td{border: 1px solid red;height: 20px;}</style></head><body><h1>行拖動</h1><table id="table" class="table"><tbody><tr><td>1</td><td>One</td><td>dom.require</td></tr><tr id="2" ><td class="2">2</td><td>Two</td><td>ControlJS </td></tr><tr id="3" ><td class="3">3</td><td>Three</td><td>HeadJS</td></tr><tr id="4" ><td class="4">4</td><td>Four</td><td>LAB.js</td></tr><tr id="5" ><td class="5">5</td><td>Five</td><td>$script.js</td></tr><tr id="6" ><td class="6">6</td><td>Six</td><td>NBL.js</td></tr></tbody></table></body></html>希望本文所述對大家的javascript程序設計有所幫助。
新聞熱點
疑難解答
