How to structure a QML project

[wysota]

The only thing I did not get to work is the text animation. My plan was to create a signal within clock signal tick(clock.time) and "connect" it within the countdown page by using onTick: {} but this gives me the error : "Cannot assign to non-existent property "onTick"".

Using timers for animations in QtQuick is not a proper approach. You have a bunch of types inheriting Animation to do animations.

So how can I send a signal from one file to another?

You don't send signals from somwhere to somewhere else. You just emit a signal and if anyone is interested in it, he can connect to that signal.

All signal examples I found were only within one page. Or how else could I start and stop my text animation?

The declarative approach would be to come up with a statement that states when the animation is running, e.g.:

NumberAnimation {
// ...
  running: clock.cycles > 0
// ...
}

NumberAnimation {
// ...
  running: clock.cycles > 0
// ...
}

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By the way, from what I see you can get rid of the whole ticker of yours and do everything you do there in a declarative manner instead of imperative statements. The hardest part in learning QML is to make yourself stop thinking imperatively and start thinking declaratively.

[KeineAhnung]

Hi wysota,

first of all thanks a lot for your help. You put me on the right path!

By the way, from what I see you can get rid of the whole ticker of yours and do everything you do there in a declarative manner instead of imperative statements.

Is this also true if I want to us the property time on several pages? Say I have to labels in two qml files. Within the app the user shall be able to switch between the pages and always the the time.

You don't send signals from somewhere to somewhere else. You just emit a signal and if anyone is interested in it, he can connect to that signal.

This exactly what I did not manage. How do I connect to a signal? onSignalName in another qml file always gives me an error.

[wysota]

Is this also true if I want to us the property time on several pages? Say I have to labels in two qml files. Within the app the user shall be able to switch between the pages and always the the time.

I'd start by explaining what are your intentions for having the "time" property in the first place. I think that the sole existance of this property is your main problem. Regardless if this property is physically global or not, you are treating it as one which in my opinion is a misdesign.

This exactly what I did not manage. How do I connect to a signal? onSignalName in another qml file always gives me an error.

There is a number of approaches, one of them being to use the Connections element.

Connections {
  target: someOtherElement
 
  onSignalHandler: { ... }
}

Connections {
  target: someOtherElement

  onSignalHandler: { ... }
}

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