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Question

Answer 1

+1 A:

Simple solution (see DEMO):

<!DOCTYPE html>
<html>
<head>
  <style>
  #parent { height: 300px; width: 300px; border: 1px black solid; position: relative; left: 0; }
  #images { height: 100px; width: 100px; background-color:orange; }
  </style>
  <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.js"&gt;&lt;/script&gt;
  <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.5/jquery-ui.js"&gt;&lt;/script&gt;
</head>
<body>
<div id="parent">
    <div class="container">
        <div id="images"></div>
    </div>
</div>
<script>
$(document).ready(function() {
    var
        $document = $(document),
        $parent = $("#parent"),
        $container = $(".container", $parent),
        offset = $container.offset(),
        scrollbarSafety = 15; // use this to avoid dragging outside of window, thus creating scrollbars and wreaking all kinds of havoc on draggables containment checks

    $container
        .width($document.width() - offset.left - scrollbarSafety)
        .height($document.height() - offset.top - scrollbarSafety);

    $("#images")
            .draggable(
            {
                containment: $container,
                drag:
                    function(event, ui)
                    {
                        var
                            $draggee = $(this),
                            draggeePosition = $draggee.position(),
                            shouldWidth = draggeePosition.left + $draggee.width(),
                            shouldHeight = draggeePosition.top + $draggee.height();
                        if($parent.width() < shouldWidth)
                        {
                            $parent.width(shouldWidth);
                        }
                        if($parent.height() < shouldHeight)
                        {
                            $parent.height(shouldHeight);
                        }
            }
            }
        );
});
</script>
</body>
</html>

Thomas 2010-10-16 06:58:53

ansaurus

tags:

views:

answers:

Draggable and extensible containment

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