Initial View/Widgets state?

[maiorfi]

Hi. In your guide you say "The only issue is at start all drawn controls must receive the value."

What do you mean, exactly? If I open a view after a node-red flow containing corresponding vis node, how could I re-sync widget state? Is there a way vis can ask for initial state?

Thanks!

[GermanBluefox]

Hello, Vis in ioBroker environment asks at start the state of all variables. In node-red there is no such possibility and this should be solved by just cyclic sending of all variable values that used in widgets.

Regards, Bluefox

[GermanBluefox]

But may be it is good idea to hold values of all variables and give it back when view is opened.

Must think about it.

[hermannw]

Let me tell you how I solved this: I noticed that vis is sending out three messages when the view is changed or reloaded. One of the messages has the topic "vis.control.command". I feed this topic as "page_reloaded" into an MQTT node. Let's say I want to turn a light on/off. This would be the flow: The inject node would be the normal way to turn your light on/off. The content of the function node is this:

context.light_State = context.light_State || null;  //preserve state between invocations

if (msg.topic == "page_reload") {
    // send last state again
    msg.topic = "set if necessary";
    msg.payload = context.light_State; //reload the last saved state
} else if (msg.topic == "light1") {
    //do something to switch the light on/ff
    context.light_State = "1"; // save the current state 
}

return msg;

So if the message comes in from the MQTT node with the topic "page_reload" it just resends the payload with the previously stored state.

Hope this helps until we find something better. ;-)

Hermann

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Ok so here are some restrictions to this method: The output of the three messages seems to be dependent of the OS and the browser type. Windows 7 PC Firefox - works ok. Messages sent out Chrome - works ok. Messages sent out

Android tablet Version 4.2.2 Firefox - works ok but no messages sent out. Chrome - shows only "No connection to server". It won't open node-red either...

Android phone Version 4.1.1 Firefox - works ok. No messages sent out Chrome - works ok. No messages sent out

Any idea why this happens?

[GermanBluefox]

Nice solution. Can I close the issue?