Create an option to disable the focusing code in dialog.open

dialog.open contains the code below (as of 1.7.2, I checked the latest release and the code is similar).

The filters with :tabbable are nice, but if you have complex content in the dialog, they can take a long time to run. Some of my dialogs take minutes(!) to open on older machines with IE6. Monkey-patching dialog.open to remove the tabbing code made the dialog open instantly, so the tabbing is obviously a major performance hog for complex dialogs.

I therefore suggest adding an option to disable this code in a future version, although that might require another way of determining if the focus leaves a modal dialog.

Relevant code from 1.7.2:

prevent tabbing out of modal dialogs

(options.modal && uiDialog.bind('keypress.ui-dialog', function(event) {

if (event.keyCode != $.ui.keyCode.TAB) {

return;

}

var tabbables = $(':tabbable', this),

first = tabbables.filter(':first')[0],

last = tabbables.filter(':last')[0];

if (event.target == last && !event.shiftKey) {

setTimeout(function() {

first.focus();

}, 1);

} else if (event.target == first && event.shiftKey) {

setTimeout(function() {

last.focus();

}, 1);

}

}));

set focus to the first tabbable element in the content area or the first button

// if there are no tabbable elements, set focus on the dialog itself

$([])

.add(uiDialog.find('.ui-dialog-content :tabbable:first'))

.add(uiDialog.find('.ui-dialog-buttonpane :tabbable:first'))

.add(uiDialog)

.filter(':first')

.focus();