How can I create a HABPanel widget that controls multiple Philips Hue Bulbs?

[vzorglub (Vincent Regaud)]

Custom Widget: Multi-state Widget

The HABpanel excited me from the first moment on! Great job and congratulations to all supporters!! For all my items I could not find one widget, that displays the items plus values of one group. I also wanted to offer to change all of them at once and I wanted to have more transparancy in my heating and rollershutters etc etc. The side condition was: No global css - everything should run out of the box. So I started to work on this widget. Please find attached the possibilities how to use t…