Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. QML and Qt Quick
  4. Loader question
Qt 6.11 is out! See what's new in the release blog

Loader question

Scheduled Pinned Locked Moved QML and Qt Quick
qmlqtquickloader
2 Posts 2 Posters 1.5k Views 2 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • shavS Offline
    shavS Offline
    shav
    wrote on last edited by
    #1

    Hi everyone!

    In my app I have a timer which must refresh UI elements use requests to server. This timer calls method:

    loader.setSource("ContentsView.qml", {manager: root.manager});
    

    every 30 seconds. The ContentsView.qml is a qml file with a lot off other cml files with elements. In my app I'm using signal/slots logic for request and all qml files which shows some information form server content has connects to signals of requests. The my question is: When I call setSource() method the old content removed from memory and all connects to signals is removed? Because I have this problem:

    qrc:///qml/NestleanStatistic.qml:107: TypeError: Cannot read property of null
    qrc:///qml/NestleanStatistic.qml:107: TypeError: Cannot read property of null
    qrc:///qml/NestleanStatistic.qml:107: TypeError: Cannot read property of null
    qrc:///qml/NestleanStatistic.qml:107: TypeError: Cannot read property of null
    qrc:///qml/NestleanStatistic.qml:107: TypeError: Cannot read property of null
    qrc:///qml/NestleanStatistic.qml:107: TypeError: Cannot read property of null
    qrc:///qml/NestleanStatistic.qml:162: TypeError: Cannot read property of null
    qrc:///qml/NestleanStatistic.qml:162: TypeError: Cannot read property of null
    qrc:///qml/NestleanStatistic.qml:162: TypeError: Cannot read property of null
    qrc:///qml/NestleanStatistic.qml:162: TypeError: Cannot read property of null
    qrc:///qml/NestleanStatistic.qml:162: TypeError: Cannot read property of null
    qrc:///qml/NestleanStatistic.qml:162: TypeError: Cannot read property of null
    

    As you can see every time when timer reload Loader cml files has a more and more calls slots. What I do wrong? And the component it not null.

    Mac OS and iOS Developer

    p3c0P 1 Reply Last reply
    0
    • shavS shav

      Hi everyone!

      In my app I have a timer which must refresh UI elements use requests to server. This timer calls method:

      loader.setSource("ContentsView.qml", {manager: root.manager});
      

      every 30 seconds. The ContentsView.qml is a qml file with a lot off other cml files with elements. In my app I'm using signal/slots logic for request and all qml files which shows some information form server content has connects to signals of requests. The my question is: When I call setSource() method the old content removed from memory and all connects to signals is removed? Because I have this problem:

      qrc:///qml/NestleanStatistic.qml:107: TypeError: Cannot read property of null
      qrc:///qml/NestleanStatistic.qml:107: TypeError: Cannot read property of null
      qrc:///qml/NestleanStatistic.qml:107: TypeError: Cannot read property of null
      qrc:///qml/NestleanStatistic.qml:107: TypeError: Cannot read property of null
      qrc:///qml/NestleanStatistic.qml:107: TypeError: Cannot read property of null
      qrc:///qml/NestleanStatistic.qml:107: TypeError: Cannot read property of null
      qrc:///qml/NestleanStatistic.qml:162: TypeError: Cannot read property of null
      qrc:///qml/NestleanStatistic.qml:162: TypeError: Cannot read property of null
      qrc:///qml/NestleanStatistic.qml:162: TypeError: Cannot read property of null
      qrc:///qml/NestleanStatistic.qml:162: TypeError: Cannot read property of null
      qrc:///qml/NestleanStatistic.qml:162: TypeError: Cannot read property of null
      qrc:///qml/NestleanStatistic.qml:162: TypeError: Cannot read property of null
      

      As you can see every time when timer reload Loader cml files has a more and more calls slots. What I do wrong? And the component it not null.

      p3c0P Offline
      p3c0P Offline
      p3c0
      Moderators
      wrote on last edited by
      #2

      @shav

      When I call setSource() method the old content removed from memory and all connects to signals is removed?

      AFAIK, Yes.

      157

      1 Reply Last reply
      0

      • Login

      • Login or register to search.
      • First post
        Last post
      0
      • Categories
      • Recent
      • Tags
      • Popular
      • Users
      • Groups
      • Search
      • Get Qt Extensions
      • Unsolved