Some years (possibly many) I posted a question on the forum about how to create a slider control with two moveable dots. The general purpose was to define a "band filter" with an upper and lower cutoff points. The results were, in those days, pretty poor and in the end I resorted to using two sliders. It worked but was visually unappealing and user-unfriendly.

This beast has raised its head again this week. In fact it has grown even another head    This time I need a slider with three active points. It's proposed use is to model a "service life" vs "usable life" for a product. (Service life being the period over which the manufacturer will build and service the commodity and usable life being the period over which the commodity will actually function. Consider an electric toaster, it typically has a short service life as the manufacturer updates the "look" of the product say every two years but in fact it has a much longer usable life as any given item will probably (possibly?) last near ten years. Then it is pretty hard for the manufacturer to drive new model purchases unless they introduce features so far outweighing the utility of the previous model, say a toaster that talks? So, my query is..

in the intervening years and the use of the Draw features, has anyone come up with such a band filter control?

I asking before I commit myself to weeks of work learning how to build it or indeed whether it is possible nowadays.

tia
bruce

…for a slider with three indicators, perhaps you could think of a code like the :? following:

 Does it need to be a "Slider" , ie, settable with mouse?

Sounds more like you want just a visual thing to show multiple levels.

 Thank you Vuott, that's got me off to a good start. I have a lot to do yet.

&@BruceS
It does need to be an active control, not just for visualisation ("That would be too easy." said the requirements specifier)

b

 Getting there! The picture is a variation where two ranges are supported (Min->Med and Min->Max) and shown as two bars. Pretty happy with the display.
Of course, for the "toaster" scenario, the usable life is typically a lot longer than the manufacturing period. The scenario where this two ranges is required is the "lightbulb" model. The commodity will be manufactured for as long as the production machinery is expected to last but the commodity has a usable lifetime that is much shorter. So the consumer has to keep buying replacements, so the manufacturer is overjoyed.

A colleague has just pointed out a third scenario involving "shelf life", for example a missile. Manufacturer only produces for a short time according to contract, the commodity sits around for a certain time before it rusts, the commodity itself has a usable life of about 4 minutes. Hmm, unless he can come up with another example, I think I'll just ignore this one as it would mean a slider with 4 buttons. Or even more…

(Click to enlarge)