Using .rules-variable as item label?

Setup, Configuration and Use Items & Sitemaps
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1

Hi! I’ve got a “var Number tParty = 19.5” in my heating.rules. I would like to have a switch on my sitemap that is labeled “Party [value_of_tParty] °C”. Is that possible?

2

If you have item for that then you can use something like that:

Number MyTemperature "Temperature [%.1f °C]" { someBinding:somevalue }

In general formatting of items is described here:

If you do not have item but rule variable you need to create “virtual” item which will be updated from rule code.

1 Like
3

If i understand you right, the label besides the switch should be a dynamic one with the temperature. The switch then should start some heating or colling to the desired temperature. Right?

Example:

Party 19,0°c (Switch)

I have done simlar thing with fuelstation display in my rules.

Sitemap
Switch item=MyPartySwitch label="Party -,- °C" icon="party"

This should display a switch in your sitemap with the label “Party -,- °C” and a party icon

Now the trick:
party.rules

rule "Display party temp"
when
    Item tParty received update
then
    MyPartySwitch.Label = String::format("Party %.3f °C", tParty.state as DecimalType)
end

The rule just set the label each time the Number item receives an update.

It think that gives you an idea.

Thomas

4

Hi Dibbler42,

just tried for my usecase what you suggested here, but I get an error.

xxx [ERROR] [o.o.c.s.ScriptExecutionThread ] - Error during the execution of rule ‘xxx’: org.eclipse.xtext.util.PolymorphicDispatcher$NoSuchMethodException: Couldn’t find method ''assignValue’’ for objects [JvmVoid: (eProxyURI: xxx.rules#xtextLink::0.2.4.2.0.0::0::/2), Label , xxx, org.eclipse.xtext.xbase.interpreter.impl.DefaultEvaluationContext@22d20afb, org.eclipse.xtext.util.CancelIndicator$1@d574100]

So “.Label” is not working for my Item.

That is my Code (I set the String Item Gast_Name_UG_Gaestezimmer in a sitemap with a selection)

rule "Gast_Name_UG_Gaestezimmer_changed"
when
		Item Gast_Name_UG_Gaestezimmer received update
then
    	g_UG_Gaestezimmer_Rollladen.Label = Gast_Name_UG_Gaestezimmer.state.toString()
end

Can you help me?

Thanks in advance

5

maybe help is very simple, just use .label instead of .Label. I check it with my rule and found that i use .label

Did you use the Designer to develop your rules? With ctrl + Space you should be able to browse trough all the options.

Thomas

6

Thanks for quick reply.

unfortunately not, tired it, similar error (shame I did not tried it before :slight_smile: . I use the Designer and was wondering why the Content Assist did not show Label nor label. Therefore I asked for help.
Even tried to set a fixed name in rule with no success either.
Also tried a single item instead of a group item, no success, “.label” coud not be resolved. Do I need another import?

7

Very funny. here are my lines of code and it works like a charme

		for (MapEntry : StationPrices.entrySet.sortBy[value]) {
			// Set the item label to station name
			openHABItems.get(i).label = StationNames.get(MapEntry.getKey())
			// Set price
			if (MapEntry.getValue() != Double.MAX_VALUE) {
				openHABItems.get(i).postUpdate(String::format("%.3f €", MapEntry.getValue()))
			} else {
				openHABItems.get(i).postUpdate("geschlossen")
			}
			i++
		}
8

Which type of item do you use? A Text item? I want to change the label of a Rollershutter, perhaps that is the issue?

9

Tested it with different single item types (number, switch, string), no success, could not change the label dynamically

10

I change the labels of string items. Could you post your code again? Maybe we find something

11

For sure, tried to reduce it:

Items:

String	Gast_Name_UG_Gaestezimmer		"Gastname im UG Gästezimmer"	(g_Namen)
Group:Rollershutter:OR(UP,DOWN)	g_UG_Gaestezimmer_Rollladen	"Rollladen Gästezimmer[%d %%]"	<rollershutter>	(g_UG_Rollladen, g_UG_Gaestezimmer)

sitemap to change the guest name:

Selection item=Gast_Name_UG_Gaestezimmer label="Gastname im UG Gästezimmer" icon="info" mappings=["Gast A"="Gast A", "Gast B"="Gast B", "Gästezimmer"="Gästezimmer"]

rule

rule "Gaeste_initialisieren"
when
	System started
then
{
	postUpdate(Gast_Name_UG_Gaestezimmer, "Gästezimmer")
}
end

rule "Gast_Name_UG_Gaestezimmer_changed"
when
		Item Gast_Name_UG_Gaestezimmer received update
then
    	g_UG_Gaestezimmer_Rollladen.label=Gast_Name_UG_Gaestezimmer.state.toString()
end

sitemap which should show dynamic label:

Switch item=g_UG_Gaestezimmer_Rollladen	mappings=[UP="Hoch", STOP="X", DOWN="Runter"]
12

I assume you build the items in your rules file, don’t you?
I want to change the label of an existing item

13

No, the items are not Build in the rule. The items are placeholders for different fuelstation values and i sort the prices and then i need to change the label according to che cheapest station.

Maybe it is a problem with groups. you could try it with a string item. if it work we are one step ahead.

Thomas

14

Tried a single item as well, with no success (see post #6 and post 9)

Even found your code on knx-user-forum.de and tried your imports (just to elimimate this even if I didn’t think so)

15

Hi @Dibbler42,

A very interesting post. I tried applying this logic to have the “lastUpdate” in my item’s label. This is to avoid duplicating all my items (_DateTime update items) and showing the lastUpdate as a separate line on my sitemap.

I tried it like this:

rule "Update label"
when
    Item Tex_Window_W10_GV_Bureau_Zijkant received update
then
	// logInfo("Window", Tex_Window_W10_GV_Bureau_Zijkant.lastUpdate)
    // Tex_Window_W10_GV_Bureau_Zijkant.Label = String::format("ABC Raam Bureau zijkant %1$td.%1$tm.%1$tY %1$tT ", Tex_Window_W10_GV_Bureau_Zijkant.lastUpdate)
    Tex_Window_W10_GV_Bureau_Zijkant.Label = String::format("ABC Raam Bureau zijkant %s ", Tex_Window_W10_GV_Bureau_Zijkant.lastUpdate)
end

However, when the rule is triggered, I get:

2017-05-29 18:03:23.624 [ERROR] [.script.engine.ScriptExecutionThread] - Rule 'Update label': An error occured during the script execution: Couldn't invoke 'assignValueTo' for feature JvmVoid:  (eProxyURI: test.rules#|::0.2.2.2.0.1::0::/2)

I’m not sure what I am doing wrong. Or maybe it is just not possible?

16

Sorry no idea, maybe you should try first to assign a non dynamic string.

Thomas

17

Maybe that needs a .toString

18

Hi,

I have made some progress.

This seems to do the trick:

rule "Update label"
when
	Item Tex_Window_W10_GV_Bureau_Zijkant received update
then
	Tex_Window_W10_GV_Bureau_Zijkant.label = String::format("Last update on %s ", Tex_Window_W10_GV_Bureau_Zijkant.lastUpdate.toString)
end

The “.toString” was missing and it should be “.label” instead of “.Label”.

The only problem is that I am not getting a nice date format. It is shown as “Last update on 2017-05-30T09:39:44.310+02:00”

I tried changing it to:

Tex_Window_W10_GV_Bureau_Zijkant.label = String::format("Last update on %1$td.%1$tm.%1$tY %1$tT ", Tex_Window_W10_GV_Bureau_Zijkant.lastUpdate.toString)

But then I get a “d != java.lang.String”. When I remove the “toString”, I get a “d != org.joda.time.DateTime”.

So how do I get it displayed nicely (e.g. 30-05-2017 09:46)?

Thanks,
Dries

19

I’ve found it! :slight_smile:

Tex_Window_W10_GV_Bureau_Zijkant.label = "Last update on: " + Tex_Window_W10_GV_Bureau_Zijkant.lastUpdate.toDateTime.toString("dd-MM-yy hh:mm")
20

I want to sort a group of items from largest to smallest and then show this order in a sitemap - perhaps by changing some placeholder items labels and values - your code here looks similar but wondering if you could show an example from start to finish including items/groups, sitemaps and rules?