Resizable Modal Popup

Question

I am trying to make a modal window resizable by clicking increase and decrease icons. The modal should also be positioned at the middle of the screen after each increase/decrease click.

So far, only increase is working. Can anyone shed light on what I am doing wrong?

this.increaseModal = function () {
        var maxHeight = ($(window).height() * 90) / 100;
        var maxWidth = ($(window).width() * 90) / 100;
        var height = ($(window).height() * 10) / 100;
        var width = ($(window).width() * 10) / 100;
        if ($('.modal-content').height() <= maxHeight - 100) {
            $('.modal-content').height($('.modal-content').height() + height);
            increaseHeightCount = increaseHeightCount + 1;
        }
        if ($('.modal-content').width() <= maxWidth - 100) {
            $('.modal-content').width($('.modal-content').width() + width);
            increaseWidthCount = increaseWidthCount + 1;
        }
        $('.modal-dialog').draggable();
        $('#myModal').addClass('outPopUp');
    }

this.decreaseModal = function () {
    var maxHeight = ($(window).height() * 90) / 100;
    var maxWidth = ($(window).width() * 90) / 100;
    var height = ($(window).height() * 10) / 100;
    var width = ($(window).width() * 10) / 100;
    if (increaseWidthCount > 0) {
        $('.modal-content').width($('.modal-content').width() - width);
        increaseWidthCount = increaseWidthCount - 1;
    }
    if (increaseHeightCount > 0) {
        $('.popup').height($('.popup').height() - height);
        increaseHeightCount = increaseHeightCount - 1;
    }
}

outPopUp is the class where I override bootstrap css for changing the modal window position.

As far as I can see in the DOM explorer, .popup is not assigned to the element and hence increase/decrease height is not working.

Solution

JQuery already has the functions you need to accomplish this.

$('.modal-content').resizable({
    //alsoResize: ".modal-dialog",
    //minHeight: 150
});
$('.modal-dialog').draggable();

$('#myModal').on('show.bs.modal', function () {
    $(this).find('.modal-body').css({
        'max-height':'100%'
    });
});

<script src="https://code.jquery.com/ui/1.11.3/jquery-ui.min.js"></script>
<link href="https://code.jquery.com/ui/1.11.3/themes/smoothness/jquery-ui.css" rel="stylesheet"/>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet"/>


<!-- Button trigger modal -->
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title" id="myModalLabel">Modal title</h4>
      </div>
      <div class="modal-body">
        <form>
          <div class="form-group">
            <label for="recipient-name" class="control-label">Recipient:</label>
            <input type="text" class="form-control" id="recipient-name">
          </div>
          <div class="form-group">
            <label for="message-text" class="control-label">Message:</label>
            <textarea class="form-control" id="message-text"></textarea>
          </div>
        </form>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>

https://jsfiddle.net/p7o2mkg4/

Comments

[Gabe]

Just for clarification, this functionality is part of the jQuery UI library.