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Changing readonly at runtime [message #1772687]

Wed, 13 September 2017 20:45

Jabba Loon

Messages: 11
Registered: August 2017

Junior Member

Hi All,

Quick question. Is it possible to dynamically disable or otherwise make read-only a channel at runtime?

Consider the scenario where (for example) I have "Vol+", "Vol-" and "Mute" channels (switches). If someone triggers the "Mute" channel, the I would like to disable the "Vol+" and "Vol-" channels (switches).

I can't seem to find a way of doing this, so am wondering if:
a) it is possible? or
b) I have a design flaw in my thinking in relation to interrelationships between channels!

Thanks,
Jabba

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Re: Changing readonly at runtime [message #1772712 is a reply to message #1772687]

Thu, 14 September 2017 08:46

Henning Treu

Messages: 37
Registered: April 2017

Member

Hi,

I have a question about the functional requirements you are describing: Why do you want to prevent the user from altering volume when on mute? From my physical remote controls I expect to either unmute and start at the lowest possible volume when I change volume during mute or change volume and stay muted. One scenario: I go on mute to better hear the surroundings and then press Vol+ to fade in the music/tv sound again.

What do you think?

Cheers,
Henning

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Re: Changing readonly at runtime [message #1772773 is a reply to message #1772712]

Fri, 15 September 2017 06:44

David Graeff

Messages: 15
Registered: April 2016

Junior Member

I think it would be neat to be able to "disable" channels though. Sometimes certain features are really not available.

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Re: Changing readonly at runtime [message #1772916 is a reply to message #1772773]

Mon, 18 September 2017 17:02

Jabba Loon

Messages: 11
Registered: August 2017

Junior Member

Hi Guys,

The volume / mute was just an example. I agree that it may not be a great one! David, you are correct in saying (better than I did!) that I basically want to be able to disable certain channels under certain circumstances (eg: where functionality is not available as a result of the state of another channel). For example (a real one this time!)...I am creating a binding for an alarm panel. I have a channel to indicate when system is ready to arm (eg: it reacts to zones being open or faults being present etc...). It doesn't make sense for the "Arm Alarm" channel to be available when the "Ready to Arm" one is in the "not ready" state. Obviously, there is no harm in the user clicking the arm button, but it will not cause the alarm to Arm as there are open zones etc... However, from a usability point of view, it would seem to be better to have the arm channel disabled so that the user doesn't inadvertently select that option and think that they have done something etc...

David, I am guessing from your reply that this scenario is not supported? Eg: Programmatically disabling channels? Any other ideas or suggestions on how to achieve same? I haven't looked (yet) at creating a site map for the binding, but maybe I can disable through Javascript on same? (very hacky though!).

Thoughts?
Jabba

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Re: Changing readonly at runtime [message #1773335 is a reply to message #1772916]

Tue, 26 September 2017 14:35

Stefan Triller

Messages: 23
Registered: April 2017

Junior Member

Inside a sitemap you can change the visibility of an item based on the state of another item, i.e.

Switch item=switch1 label="My Switch" visibility=[switch2=="ON"]

This would only show the "switch1" in the sitemap whenever "switch2" is in "ON" state. Since you brought up the sitemap idea, maybe it is an option for you as long as we do not support setting a channel to read-only at runtime.

Cheers,

Stefan

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