<![CDATA[Not able to receive signal in more than one QML file]]>Hi all,
I am new to Qt and QML. Signal emitted from cpp file is not received by two of my QML files. Though I am able to receive the signal in one QML but why it is not received by another QML.I have used
engine.rootContext()->setContextProperty("my module",&myfile) in main.cpp and using connections in both qml file
Connections{
target: myfile
function onSignal1() {
}
}
It works in one file.

Thanks in advance.

]]>https://forum.qt.io/topic/145864/not-able-to-receive-signal-in-more-than-one-qml-fileRSS for NodeThu, 05 Nov 2026 08:57:30 GMTMon, 19 Jun 2023 04:58:01 GMT60<![CDATA[Reply to Not able to receive signal in more than one QML file on Mon, 19 Jun 2023 05:38:28 GMT]]>@Gery from the point of view of the QML engine, your root context property already is a singleton (it is a single, global object, visible from all QML code).

If your other QML file is not loaded when signal is emitted, you have 2 options I think:

  • Load the file earlier (maybe with a Loader? It's really hard to say for me since I don't know your code)
  • make sure the data from signal is available in your myModule object later, when the other QML file needs it. For example, myModule can have a Q_PROPERTY which holds the data. Then QML can always access it easily
]]>https://forum.qt.io/post/761859https://forum.qt.io/post/761859Mon, 19 Jun 2023 05:38:28 GMT<![CDATA[Reply to Not able to receive signal in more than one QML file on Mon, 19 Jun 2023 05:31:23 GMT]]>@sierdzio sorry for typo, I have used myModule only and its working in one. Is there any work around to work with same live object, is it using singleton object, I am bit stuck on it.

]]>https://forum.qt.io/post/761858https://forum.qt.io/post/761858Mon, 19 Jun 2023 05:31:23 GMT<![CDATA[Reply to Not able to receive signal in more than one QML file on Mon, 19 Jun 2023 05:28:05 GMT]]>@Gery said in Not able to receive signal in more than one QML file:

You register my module as object name, but you try to connect to myfile. That might be one part of the problem. Another (just a guess) is that when signal is sent, only one of the QML files is open and loaded by the engine. So the other one does not receive the signal because it's not a live object.

engine.rootContext()->setContextProperty("my module",&myfile) 

Connections{
  target: myfile
  function onSignal1() {
  }
}
]]>https://forum.qt.io/post/761857https://forum.qt.io/post/761857Mon, 19 Jun 2023 05:28:05 GMT<![CDATA[Reply to Not able to receive signal in more than one QML file on Mon, 19 Jun 2023 05:13:31 GMT]]>@Gery how do you connect to your signal in both QML files?

]]>https://forum.qt.io/post/761851https://forum.qt.io/post/761851Mon, 19 Jun 2023 05:13:31 GMT