Invalid mouse offset for cross-frame draggable + sortable

Question

We are currently trying to accomplish cross-frame dragging between draggables and sortables provided by jQuery UI. This is working properly now. However, the mouse offset seems off when dragging from the parent to the child frame--please see this fiddle: http://jsfiddle.net/r5nfe/6/.

Code in the parent:

$('#my-frame').load(function () {
    $('.draggable').draggable({
        appendTo: 'body',
        helper: 'clone',
        iframeFix: true,
        revert: 'invalid',
        connectToSortable: $('#my-frame').contents().find('.sortable'),
        cursorAt: { top: 0, left: 0 } 
    });

    $('#my-frame').contents().find('.sortable').sortable({
        iframeFix: true,
        cursorAt: { top: 0, left: 0 } 
    });
});

Code in the child frame:

var containers = $('.sortable');
containers.sortable({
    connectWith: containers,
    cursor: 'move',
    revert: true,
    cursorAt: { top: 0, left: 0 } 
});

Can someone please tell us how to fix the mouse offset?

Answer 1

solution 2 update

I added this js function because when you add too many draggable element to the iframe, the drag elements can be overlapped by the sortable elements if you scroll down

$('.draggable').on('dragstop',autoResize);


function autoResize(){
    var newheight;
    if(document.getElementById){
        newheight=document.getElementById('my-frame').contentWindow.document .body.scrollHeight;
    }
    newheight=newheight+100;
    $('#my-frame').css('height',newheight);
}

here the new jsfiddle
end solution 2 update

This problem appear to be a bug and someone have made his solution ( basically a workaround): trasparent div solution

1 My first solution, without changing the code, could be in placing the iframe before of the draggable stuff, as shown here, the code:

<iframe id="my-frame" src="/VqxGf/3/show"></iframe>
<ul>
    <li class="draggable">Drag me</li>
    <li class="draggable">Drag me 2</li>
    <li class="draggable">Drag me 3</li>
</ul>

2 Another solution that seems to work is to play with the style property: position absolute for the ul in which contain the draggable

s, a bit of margin-top for the sortable stuff in the frame and, maybe, a frameborder=0. jsfiddle The main page:

<ul style="position:absolute">
    <li class="draggable">Drag me</li>
    <li class="draggable">Drag me 2</li>
    <li class="draggable">Drag me 3</li>
</ul>
<iframe frameborder="0" id="my-frame" src="/ATu6F/30/show"></iframe>

The iframe page:

<ul id="sortable" style="margin-top:100px" class="sortable idle">
    <li>Sortable</li>
    <li>Sortable 2</li>
    <li>Sortable 3</li>
</ul>

<ul id="sortable2" class="sortable idle">
    <li>Sortable</li>
    <li>Sortable 2</li>
    <li>Sortable 3</li>
</ul>

Hope this helps.

Please see the edit at the beginning of this post

Answer 2

I've tried this for my part. But it doesn't work perfectly.

I change the appendTo with parent.body, and the cursorAt with 100 on top param.

$('#my-frame').load(function () {
$('.draggable').draggable({
    appendTo: 'parent.body',
    helper: 'clone',
    iframeFix: true,
    revert: 'invalid',
    connectToSortable: $('#my-frame').contents().find('.sortable'),
    cursorAt: { top: 100, left: 0 } 
});

$('#my-frame').contents().find('.sortable').sortable({
    iframeFix: true,
    cursorAt: { top: 0, left: 0 } 
});
});