// by zhangxinxu welcome to visit my personal website http://www.zhangxinxu.com/ // zxx.drag v1.0 2010-03-23 元素的拖拽实现 var params = { left: 0, top: 0, currentX: 0, currentY: 0, flag: false }; //获取相关CSS属性 var getCss = function(o,key){ return o.currentStyle? o.currentStyle[key] : document.defaultView.getComputedStyle(o,false)[key]; }; //拖拽的实现 var startDrag = function(bar, target, callback){ if(getCss(target, "left") !== "auto"){ params.left = getCss(target, "left"); } if(getCss(target, "top") !== "auto"){ params.top = getCss(target, "top"); } //o是移动对象 bar.onmousedown = function(event){ params.flag = true; if(!event){ event = window.event; //防止IE文字选中 bar.onselectstart = function(){ return false; } } var e = event; params.currentX = e.clientX; params.currentY = e.clientY; }; document.onmouseup = function(){ params.flag = false; if(getCss(target, "left") !== "auto"){ params.left = getCss(target, "left"); } if(getCss(target, "top") !== "auto"){ params.top = getCss(target, "top"); } }; document.onmousemove = function(event){ var e = event ? event: window.event; if(params.flag){ var nowX = e.clientX, nowY = e.clientY; var disX = nowX - params.currentX, disY = nowY - params.currentY; target.style.left = parseInt(params.left) + disX + "px"; target.style.top = parseInt(params.top) + disY + "px"; } if (typeof callback == "function") { callback(parseInt(params.left) + disX, parseInt(params.top) + disY); } } };
时间: 2024-11-07 16:31:35