Javascript 可移动/拖动<;部门>;
这是我的更新和修改的脚本,它的作品完全,除了我想普及它。。。观察****我如何使它不必每次我需要为不同的元素使用可拖动函数时都执行Javascript 可移动/拖动<;部门>;,javascript,draggable,move,mousemove,Javascript,Draggable,Move,Mousemove,这是我的更新和修改的脚本,它的作品完全,除了我想普及它。。。观察****我如何使它不必每次我需要为不同的元素使用可拖动函数时都执行函数(e){BOX.Draggable.elemen=e.target | | | e.src元素;elementDraggable(e); window.onload = addListeners; var BOX = function(){ return{ Draggable: function(){} }; }(); function add
函数(e){BOX.Draggable.elemen=e.target | | | e.src元素;elementDraggable(e);
window.onload = addListeners;
var BOX = function(){
return{
Draggable: function(){}
};
}();
function addListeners(){
document.getElementById('div').addEventListener('contextmenu', menumove, false);
**document.getElementById('div').addEventListener('mousedown', function(e){BOX.Draggable.elemen = e.target || e.srcElement; elementDraggable(e);}, false);**
}
function elementDraggable(e){
var e = e || window.event;
var div = BOX.Draggable.elemen;
BOX.Draggable.innerX = e.clientX + window.pageXOffset - div.offsetLeft;
BOX.Draggable.innerY = e.clientY + window.pageYOffset - div.offsetTop;
window.addEventListener('mousemove', elementMove, false);
window.addEventListener('mouseup', function(){
window.removeEventListener('mousemove', elementMove, false);
}, true);
function elementMove(e){
div.style.position = 'absolute';
div.style.left = e.clientX + window.pageXOffset - BOX.Draggable.innerX + 'px';
div.style.top = e.clientY + window.pageYOffset - BOX.Draggable.innerY + 'px';
}
}
jQuery是您的一个选项吗?因为代码已经存在,它使您所做的事情变得非常简单 JavaScript代码
window.onload = addListeners;
function addListeners(){
document.getElementById('dxy').addEventListener('mousedown', mouseDown, false);
window.addEventListener('mouseup', mouseUp, false);
}
function mouseUp()
{
window.removeEventListener('mousemove', divMove, true);
}
function mouseDown(e){
window.addEventListener('mousemove', divMove, true);
}
function divMove(e){
var div = document.getElementById('dxy');
div.style.position = 'absolute';
div.style.top = e.clientY + 'px';
div.style.left = e.clientX + 'px';
}
您的移动代码简化为:
div.style.position = "absolute";
div.style.top = e.clientY - (e.clientY - div.offsetTop) + "px";
div.style.left = e.clientX - (e.clientX - div.offsetLeft) + "px";
这里的基础数学-e.clientX
和e.clientY
对此处的位置绝对没有影响,因此您只需取偏移左
,并将其重新指定为样式。左
,顶部也一样。因此没有任何移动
您需要做的是在mousedown
发生时保存clientX
和clientY
,并在此基础上进行减法
哦,您还将事件侦听器设置错误。现在的方式是,让它运行一次
divMove
,返回值(undefined
)是作为侦听器附加的函数。相反,使用function(e){divMove(dxy,e | | window.event)}
这是一个不错的无jQuery脚本来拖动div:
#容器{
位置:绝对位置;
背景颜色:蓝色;
}
#元素{
位置:绝对位置;
背景颜色:绿色;
-webkit用户选择:无;
-moz用户选择:无;
-o-用户选择:无;
-ms用户选择:无;
-khtml用户选择:无;
用户选择:无;
}
var mydragg=函数(){
返回{
移动:函数(divid、xpos、ypos){
divid.style.left=xpos+'px';
divid.style.top=ypos+'px';
},
startMoving:函数(divid、容器、evt){
evt=evt | | window.event;
var posX=evt.clientX,
posY=evt.clientY,
divTop=divid.style.top,
divLeft=divid.style.left,
eWi=parseInt(divid.style.width),
eHe=parseInt(divid.style.height),
cWi=parseInt(document.getElementById(container.style.width),
cHe=parseInt(document.getElementById(container.style.height));
document.getElementById(container.style.cursor='move';
divTop=divTop.replace('px','');
divLeft=divLeft.replace('px','');
var diffX=posX-divLeft,
diffY=posY-divTop;
document.onmousemove=函数(evt){
evt=evt | | window.event;
var posX=evt.clientX,
posY=evt.clientY,
aX=posX-diffX,
aY=posY-diffY;
如果(aX<0)aX=0;
如果(aY<0)aY=0;
如果(aX+eWi>cWi)aX=cWi-eWi;
如果(aY+eHe>cHe)aY=cHe-eHe;
mydragg.move(divid,aX,aY);
}
},
停止移动:函数(容器){
var a=document.createElement('script');
document.getElementById(container.style.cursor='default';
document.onmousemove=函数(){}
},
}
}();
第一
第二
对“niente00”代码的附加方法
init:函数(类名){
var elements=document.getElementsByClassName(className);
对于(var i=0;i
我稍微修改了代码,将其包装在函数中,并添加了一个功能,您可以仅拖动元素的一部分或其子元素,例如div的标题栏。注意:在本演示中,您只能拖动红色区域以移动蓝色区域
函数makeDragable(dragHandle,dragTarget){
设dragObj=null;//要移动的对象
设xOffset=0;//用于防止拖动的对象跳转到鼠标位置
设yOffset=0;
document.querySelector(dragHandle).addEventListener(“mousedown”,startDrag,true);
document.querySelector(dragHandle).addEventListener(“touchstart”,startDrag,true);
/*设置偏移参数并开始侦听鼠标移动*/
功能启动图(e){
e、 预防默认值();
e、 停止传播();
dragObj=document.querySelector(dragTarget);
dragObj.style.position=“绝对”;
设rect=dragObj.getBoundingClientRect();
如果(e.type==“鼠标向下”){
xOffset=e.clientX-rect.left;//clientX和getBoundingClientRect()都使用在滚动“viewport”时调整的可视区域
yOffset=e.clientY-rect.top;
addEventListener('mousemove',dragObject,true);
}else if(例如,type==“touchstart”){
xOffset=e.targetTouches[0].clientX-rect.left;
yOffset=e.targetTouches[0].clientY-rect.top;
window.addEventListener('touchmove',dragObject,
<!doctype html>
<html>
<head>
<style>
#container {
position:absolute;
background-color: blue;
}
#elem{
position: absolute;
background-color: green;
-webkit-user-select: none;
-moz-user-select: none;
-o-user-select: none;
-ms-user-select: none;
-khtml-user-select: none;
user-select: none;
}
</style>
<script>
var mydragg = function(){
return {
move : function(divid,xpos,ypos){
divid.style.left = xpos + 'px';
divid.style.top = ypos + 'px';
},
startMoving : function(divid,container,evt){
evt = evt || window.event;
var posX = evt.clientX,
posY = evt.clientY,
divTop = divid.style.top,
divLeft = divid.style.left,
eWi = parseInt(divid.style.width),
eHe = parseInt(divid.style.height),
cWi = parseInt(document.getElementById(container).style.width),
cHe = parseInt(document.getElementById(container).style.height);
document.getElementById(container).style.cursor='move';
divTop = divTop.replace('px','');
divLeft = divLeft.replace('px','');
var diffX = posX - divLeft,
diffY = posY - divTop;
document.onmousemove = function(evt){
evt = evt || window.event;
var posX = evt.clientX,
posY = evt.clientY,
aX = posX - diffX,
aY = posY - diffY;
if (aX < 0) aX = 0;
if (aY < 0) aY = 0;
if (aX + eWi > cWi) aX = cWi - eWi;
if (aY + eHe > cHe) aY = cHe -eHe;
mydragg.move(divid,aX,aY);
}
},
stopMoving : function(container){
var a = document.createElement('script');
document.getElementById(container).style.cursor='default';
document.onmousemove = function(){}
},
}
}();
</script>
</head>
<body>
<div id='container' style="width: 600px;height: 400px;top:50px;left:50px;">
<div id="elem" onmousedown='mydragg.startMoving(this,"container",event);' onmouseup='mydragg.stopMoving("container");' style="width: 200px;height: 100px;">
<div style='width:100%;height:100%;padding:10px'>
<select id=test>
<option value=1>first
<option value=2>second
</select>
<INPUT TYPE=text value="123">
</div>
</div>
</div>
</body>
</html>
init : function(className){
var elements = document.getElementsByClassName(className);
for (var i = 0; i < elements.length; i++){
elements[i].onmousedown = function(){mydragg.startMoving(this,'container',event);};
elements[i].onmouseup = function(){mydragg.stopMoving('container');};
}
}