onOpen option

[oskarhane]

I miss an option that is triggered when the palette is opened. I want that because I have lot of elements that can change color any when an element is selected and this plugins button is clicked I want the $('.simple_color').setColor() to be triggered with the selected elements current color.

As of now, I added an onOpen option and added the call here:

var selectCallback = function (event) {
    if (options.onOpen && (!event.data.container.chooser || !event.data.container.chooser.is(':visible'))) {
      options.onOpen(element);
    }

...
}

I can make a pull request with this change if you'd like.