[javascript] jQuery UI 1.10: dialog and zIndex option

I have to make an dialog to apear when an image onclick. The problem is that I have some realy big z-index there (500 for example) and the ui dialog is on the back of that elements.

Here is the page, you need to log in, user: "raducup" and pass:"1". Another problem is that when I click close ont the dialog, the object desapears.

This is the function I call when a image is click:

function openItem(obiect){
    $( obiect ).css('zIndex',9999);
    $( obiect ).dialog({
        dialogClass: "no-close",
        modal: true,
        draggable: true,
        overlay: "background-color: red; opacity: 0.5",
        buttons: [
            {
                text: "OK",
                click: function() {
                    $( this ).dialog( "close" );
                }
            }
        ]
    });
    reparaZindex();
}

Add zIndex property to dialog object:

$(elm).dialog(
 zIndex: 10000
);

To sandwich an my element between the modal screen and a dialog, I need to lift my element above the modal-screen, and then lift the dialog above my element.

I had a small success by doing the following after creating the dialog on element $dlg.

$dlg.closest('.ui-dialog').css('zIndex',adjustment);

Since each dialog has a different starting z-index (they incrementally get larger) I make adjustment a string with a boost value, like this:

const adjustment = "+=99";

However, jQuery just keeps increasing the zIndex value on the modal screen, so by the second dialog, the sandwich no longer worked. I gave up on ui-dialog "modal", made it "false", and just created my own modal. It imitates jQueryUI exactly. Here it is:

CoverAll = {};
CoverAll.modalDiv = null;

CoverAll.modalCloak = function(zIndex) {
  var div = CoverAll.modalDiv;
  if(!CoverAll.modalDiv) {
    div = CoverAll.modalDiv = document.createElement('div');
    div.style.background = '#aaaaaa';
    div.style.opacity    = '0.3';
    div.style.position   = 'fixed';
    div.style.top        = '0';
    div.style.left       = '0';
    div.style.width      = '100%';
    div.style.height     = '100%';
  }
  if(!div.parentElement) {
    document.body.appendChild(div);
  }
  if(zIndex == null)
    zIndex = 100;
  div.style.zIndex  = zIndex;
  return div;
}

CoverAll.modalUncloak = function() {
  var div = CoverAll.modalDiv;
  if(div && div.parentElement) {
    document.body.removeChild(div);
  }
  return div;
}

Add this before calling dialog

$( obiect ).css('zIndex',9999);

And remove

 zIndex: 700,

from dialog

moveToTop is the proper way.

z-Index is not correct. It works initially, but multiple dialogs will continue to float underneath the one you altered with z-index. No good.

There are multiple suggestions here, but as far as I can see the jQuery UI guys have broken the dialogue control at present.

I say this because I include a dialogue on my page, and its semi transparent and the modal blanking div is behind some other elements. That can't be right!

In the end based on some other posts I developed this global solution, as an extension to the dialogue widget. It works for me but I'm not sure what it would do if I opened a dialogue from within a dialogue.

Basically it looks for the zIndex of everything else on the page and moves the .ui-widget-overlay to be one higher, and the dialogue itself to be one higher than that.

$.widget("ui.dialog", $.ui.dialog,
{
    open: function ()
    {
        var $dialog = $(this.element[0]);

        var maxZ = 0;
        $('*').each(function ()
        {
            var thisZ = $(this).css('zIndex');
            thisZ = (thisZ === 'auto' ? (Number(maxZ) + 1) : thisZ);
            if (thisZ > maxZ) maxZ = thisZ;
        });

        $(".ui-widget-overlay").css("zIndex", (maxZ + 1));
        $dialog.parent().css("zIndex", (maxZ + 2));

        return this._super();
    }
});

Thanks to the following, as this is where I got the info from of how to do this: https://stackoverflow.com/a/20942857

http://learn.jquery.com/jquery-ui/widget-factory/extending-widgets/

You may want to try jQuery dialog method:

$( ".selector" ).dialog( "moveToTop" );

reference: http://api.jqueryui.com/dialog/#method-moveToTop

Add in your CSS:

 .ui-dialog { z-index: 1000 !important ;}