Control whether dialog should close in callback

[JamesNK]

As far as I can tell right now a dialog always closes when a button is clicked. I'd like a way to control whether it should close or not in the button callback.

e.g.

'buttons': [
    'Cancel',
    {
        caption: "Add",
        callback: function () {
            if (dialogModel.isValid()) {
                return true;
            }
            dialogModel.errors.showAllMessages();
            return false;
        }
    }
]

I made this change to zebra_dialog.js:

// handle the button's click event
button.bind('click', function() {
    var shouldClose = true;
    // execute the callback function when button is clicked
    if (undefined != value.callback) shouldClose = value.callback(plugin.dialog);

    // remove the overlay and the dialog box from the DOM
    // also pass the button's label as argument
    if (shouldClose) plugin.close(undefined != value.caption ? value.caption : value)

});

You might want to modify if so that callbacks that don't return any value still close for backwards compatibility.

[stefangabos]

use jQuery's preventDefault to cancel an event

'buttons': [
    'Cancel',
    {
        caption: "Add",
        callback: function (e) {
            // if don't want to close the dialog box
            // notice the "e" argument to the function
            e.preventDefault();
        }
    }
]