How do I save the position of draggable & resizeab

2020-02-16 20:38发布

问题:

I'm building a site which allows users to create an html page which can then be saved and shared on another site. I want them to be able to resize and drag the page elements. I can do this using jQuery, but I'm not sure how I then save that so that when the page is viewed elsewhere, it looks the same.

I haven't decided yet how to store the page info, but what I'm thinking is that I can store each element in the database along with its absolute position, and its contents. Does that sound like a good plan?

If so, how do I get the position for the div to pass to the php so that it can be saved?

Thanks.

回答1:

JQueryUI Resizable has an event called resize that you can use:

var resposition = '';

$('#divresize').resizable({
   //options...
   resize: function(event,ui){
      resposition = ui.position;
   }
});

The same occurs with JQueryUI Draggable and its event drag:

var dragposition = '';

$('#divdrag').draggable({
   // other options...
   drag: function(event,ui){
      dragposition = ui.position;
   }
});

resposition and dragposition is going to be arrays. You can see it working here: http://jsbin.com/uvuzi5

EDIT: using a form, you can save dragposition and resposition into hidden inputs

var inputres = '<input type="hidden" id="resposition" value="'+resposition.left+','+resposition.top+'"/>'
$('#myform').append(inputres);
var inputdrag = '<input type="hidden" id="dragposition" value="'+dragposition.left+','+dragposition.top+'"/>'
$('#myform').append(inputdrag);

And in your PHP file to handle the form:

$dragposition = $_GET['dragposition'];
$resposition = $_GET['resposition'];
$dragposition = explode(',',$dragposition);
$resposition = explode(',',$resposition);

Finally, both variables should be arrays with top and left attributes:

$dragposition => [top,left] attributes from draggable
$resposition => [top,left] attributes from resizable


回答2:

you have to save position at some where so that you can get position details when next time you open page.

option 1: you can store html elements position details in "localStorage" its default browser storage. Example: Demo

<!DOCTYPE html>
<html lang="en">

<head>
    <title>Dashboard</title>
    <!-- jQuery -->
    <script src="vendor/jquery/jquery.min.js"></script>

    <link rel="stylesheet" type="text/css" href="dist/css/jquery-ui.min.css">
    <script src="dist/js/jquery-ui.min.js"></script>
</head>

<body>
    <script>
        var positions = JSON.parse(localStorage.positions || "{}");
        $(function() {
            var d = $("[id=draggable]").attr("id", function(i) {
                return "draggable_" + i
            })
            $.each(positions, function(id, pos) {
                $("#" + id).css(pos)
            })

            d.draggable({
                containment: "#wrapper",
                scroll: false,
                stop: function(event, ui) {
                    positions[this.id] = ui.position
                    localStorage.positions = JSON.stringify(positions)
                }
            });
        });
    </script>
    <div id="wrapper">
        <div id="draggable" class="ui-widget-content draggable" style="height:100px;width:100px;float:left">Div1</div>
        <div id="draggable" class="ui-widget-content draggable" style="height:100px;width:100px;float:left">Div2</div>
        <div id="draggable" class="ui-widget-content draggable" style="height:100px;width:100px;float:left">Div3</div>
    </div>
</body>

</html>

option 2: you can store html elements position details in "your database"