jQuery UI 如何在父级的父级上设置可拖动的包含选项
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jQuery UI how to set draggable containment option on parent's parent
提问by steampowered
The jQuery UI Draggable interaction has a nice property for setting the containmentas the parent.
jQuery UI Draggable 交互有一个很好的属性，可以将容器设置为父级。
$( ".selector" ).draggable({ containment: 'parent' });
I wish to set the containment as the parent's parent. There is no string value to accomplish this, as string the options are
我希望将容器设置为父级的父级。没有字符串值可以完成此操作，因为字符串选项是
'parent', 'document', 'window', [x1, y1, x2, y2]
“父”、“文档”、“窗口”、[x1、y1、x2、y2]
I could calculate x1,y1,x2,y2 of the parent's parent at page load and use those values to set boundaries for a container relative to the document. But the container position can change relative to the parent's parent position if the window is resized after page load. The native 'parent' option keeps the draggable element within the parent element regardless of window resizing.
我可以在页面加载时计算父级的 x1,y1,x2,y2 并使用这些值来设置容器相对于文档的边界。但是如果在页面加载后调整窗口大小，容器位置可以相对于父级的父级位置发生变化。无论窗口大小如何调整，本机 'parent' 选项都会将可拖动元素保留在父元素中。
Is there a way to accomplish this draggable containment using the parent's parent? .
有没有办法使用父级的父级来完成这种可拖动的遏制？.
回答by rossipedia
As per the documentation, the containmentoption can also be a jquery selector or an actual element. So you can do this:
根据文档，该containment选项也可以是 jquery 选择器或实际元素。所以你可以这样做：
$('.selector').draggable({
containment: $('.selector').parent().parent()
});
Or even better yet:
或者甚至更好：
$('.selector').each(function(){
$(this).draggable({
containment: $(this).parent().parent()
});
});
回答by wsanville
According to the docs, you do not have topass in a string for the containmentproperty. You can pass in any of:
根据该文档，你不必须在为字符串传递containment特性。您可以传入以下任何一项：
Selector, Element, String, Array
So, just select the parent's parent with jQuery (i.e. $( ".selector" ).parent().parent()), and pass in instead of 'parent'.
因此，只需使用 jQuery（即$( ".selector" ).parent().parent()）选择父级的父级，然后传入而不是'parent'.
回答by LABASTIE Fran?ois
This works fine as well:
这也很好用：
$('.selector').draggable({
containment: "#parent",
scroll: false
});
回答by Druta Ruslan
If i use $(this).parent()my element go over the parent element.
如果我使用$(this).parent()我的元素，请遍历父元素。
$('.selector').draggable({
containment: $(this).parent()
});
But with parentit works fine.
但parent它工作正常。
$('.selector').draggable({
containment: "parent"
});
