CODEWITHSUNDEEP
qtqml
Neaţu Ovidiu Gabriel
Neaţu Ovidiu Gabriel

Reputation: 903

Best way to trigger a script for any change in one of several properties

When you bind a property it will be reevaluated if one of the proprieties to which is bounded is changed. Example:

property bool test: prCond1 || prCond2 || ... || prCondN

When a condition is changed test is reevaluated.

Now... I want something similar but for triggering a javascript function: when one of several conditions prCond1 || prCond2 || ... || prCondN is changed I want a function to be called.

If there was only one condition I could write:

onPrCond1Changed: {
    functionCall()
}

But when you take into account more than one condition what is the best way to do it? Is there a standard way?

Basically I need something like this:

functionCall() if one of these changes: prCond1 || prCond2 || ... || prCondN

Where prCond's may be of different types.

Upvotes: 0

Views: 71

Answers (1)

Skogen
Skogen

Reputation: 721

A possible solution would be to group the variables into a variant list and look for changes on the list. 

property var myObject = {'prop': 'value'}
property variant conditions = [prCond1, prCond2, myObj]

onConditionsChanged: {
   console.log("one of the conditions have changed");
}

Note that changes in the properties of myObj will not trigger the changeEvent, unless the object itself is changed (e.g. myObj = new Object({'prop': 'newValue'}) )

Upvotes: 1

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