Nip*_*pey 59
我将坚持这里显示的例子:http://www.w3schools.com/html/html5_draganddrop.asp
假设我们有这个文件:
<!DOCTYPE HTML>
<html>
<head>
<script>
<!-- script comes in the text below -->
</script>
</head>
<body>
<div id="div1" ondrop="drop(event)"
ondragover="allowDrop(event)"></div>
<img id="drag1" src="img_logo.gif" draggable="true"
ondragstart="drag(event)" width="336" height="69">
</body>
</html>
正常拖放
正常拖放具有分配给各个元素的功能:
function allowDrop(ev) {
/* The default handling is to not allow dropping elements. */
/* Here we allow it by preventing the default behaviour. */
ev.preventDefault();
}
function drag(ev) {
/* Here is specified what should be dragged. */
/* This data will be dropped at the place where the mouse button is released */
/* Here, we want to drag the element itself, so we set it's ID. */
ev.dataTransfer.setData("text/html", ev.target.id);
}
function drop(ev) {
/* The default handling is not to process a drop action and hand it to the next
higher html element in your DOM. */
/* Here, we prevent the default behaviour in order to process the event within
this handler and to stop further propagation of the event. */
ev.preventDefault();
/* In the drag event, we set the *variable* (it is not a variable name but a
format, please check the reference!) "text/html", now we read it out */
var data=ev.dataTransfer.getData("text/html");
/* As we put the ID of the source element into this variable, we can now use
this ID to manipulate the dragged element as we wish. */
/* Let's just move it through the DOM and append it here */
ev.target.appendChild(document.getElementById(data));
}
拖动并复制
而你必须改变drop函数,以便复制DOM元素而不是移动它.
/* other functions stay the same */
function drop(ev) {
ev.preventDefault();
var data=ev.dataTransfer.getData("text/html");
/* If you use DOM manipulation functions, their default behaviour it not to
copy but to alter and move elements. By appending a ".cloneNode(true)",
you will not move the original element, but create a copy. */
var nodeCopy = document.getElementById(data).cloneNode(true);
nodeCopy.id = "newId"; /* We cannot use the same ID */
ev.target.appendChild(nodeCopy);
}
试试这个页面:http://www.w3schools.com/html/tryit.asp？
filename = tryhtml5_draganddrop然后追加.cloneNode(true)到getElementById(data).
在复制和粘贴之间切换
您甚至可以在文件管理器中执行操作:Ctrl-Key从移动到复制切换:
function drop(ev) {
ev.preventDefault();
var data=ev.dataTransfer.getData("text/html");
/* Within a Mouse event you can even check the status of some Keyboard-Buttons
such as CTRL, ALT, SHIFT. */
if (ev.ctrlKey)
{
var nodeCopy = document.getElementById(data).cloneNode(true);
nodeCopy.id = "newId"; /* We cannot use the same ID */
ev.target.appendChild(nodeCopy);
}
else
ev.target.appendChild(document.getElementById(data));
}
如果你想要一个使用 JQuery 的例子，我已经提供了这个 jsFiddle。本质上，您只需要绑定到drop,dragover和dropstartDOM 对象的事件。然后，您可以使用 JQuery 的内置clone()方法来复制元素。
JQuery 还返回它自己的事件包装器，因此您必须originalevent从 JQuery 事件中获取
$('#x').bind('dragstart', function(e) {
e.originalEvent.dataTransfer.effectAllowed = 'copy';
e.originalEvent.dataTransfer.setData('Text', '#x');
});
$('#drop-box').bind('drop', function(e) {
e.preventDefault();
e.stopPropagation();
$(this).html($(e.originalEvent.dataTransfer.getData('Text')).clone());
return false;
}).bind('dragover', false);
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