这个关键是用好3个事件,一个是onmousedown一个是onmousemove一个是onmouseup
onmousedown记录当前鼠标所触发的对象,在onmousemove所触发的方法中进行移动,onmouseup放下拖动的对象。我完成过这样的功能,但是代码牵涉到其他功能所以不好提取出来。说简单点就是obj跟随鼠标移动的过程
关键代码:
document.onmousemove = MouseMove;
function MouseMove(){
if(Drag){
document.onmousemove = new Function();
tdObj.style.top = (event.clientY- tdObj.mouseDownY);
tdObj.style.left = (event.clientX- tdObj.mouseDownX);
document.onmousemove = MouseMove;
}
//....其他省略了
}
onmousedown记录当前鼠标所触发的对象,在onmousemove所触发的方法中进行移动,onmouseup放下拖动的对象。我完成过这样的功能,但是代码牵涉到其他功能所以不好提取出来。说简单点就是obj跟随鼠标移动的过程
关键代码:
document.onmousemove = MouseMove;
function MouseMove(){
if(Drag){
document.onmousemove = new Function();
tdObj.style.top = (event.clientY- tdObj.mouseDownY);
tdObj.style.left = (event.clientX- tdObj.mouseDownX);
document.onmousemove = MouseMove;
}
//....其他省略了
}
<div style="left:0;top:0;position:relative;overflow:hidden;width:100%;height:100%" id="div1">
<img src="img.jpg" style="position:relative;left:0px;top:0px;width:100px;height:100px;cursor:hand;" class=imgObj>
</div>
</body>
<script language="javascript">
var checkMoving;
function divMove(){
checkMoving = false;
document.onmousedown=startMove;
document.onmousemove=moveObj;
document.onmouseup=new Function("checkMoving = false");
}function startMove(){
if(event.srcElement.className!="imgObj") return;
checkMoving=true;
Xdiff=event.clientX-event.srcElement.style.pixelLeft;
Ydiff=event.clientY-event.srcElement.style.pixelTop;
}function moveObj(){
if(!checkMoving) return true;
event.srcElement.style.pixelLeft=event.clientX-Xdiff;
event.srcElement.style.pixelTop=event.clientY-Ydiff;
return false;
}
</script>