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How to create multiple windows in separated threads using Qt?

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  • Z Offline
    Z Offline
    Zain
    wrote on last edited by
    #1

    Hello

    I want to open multiple windows using multithread with one window one thread on single click.

    Please solve this.

    Thanks
    Zain

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    • C Offline
      C Offline
      ChrisW67
      wrote on last edited by
      #2

      You cannot. All Qt GUI objects must reside in the main program thread.

      Multiple non-GUI worker threads can communicate with GUI objects in the main thread using the signals/slots mechanism.

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      • Z Offline
        Z Offline
        Zain
        wrote on last edited by
        #3

        Hello ChrisW67

        If it is not possible then please tell me another solution to create multiple webView on single click.

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        • C Offline
          C Offline
          ChrisW67
          wrote on last edited by
          #4

          Threads are not required to have multiple windows. Something like:

          @
          void on_button_clicked() {
          QWebview *webView1 = new QWebView;
          webView1->setAttribute(Qt::WA_DeleteOnClose);
          webView1->load(QUrl("http://qt-project.org"));
          webView1->show();

          QWebview *webView2 = new QWebView;
          webView2->setAttribute(Qt::WA_DeleteOnClose);
          webView2->load(QUrl("http://google.com"));
          webView2->show();
          }
          @

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          • Z Offline
            Z Offline
            Zain
            wrote on last edited by
            #5

            Thanks ChrisW67

            Also I want to set time for each webView. After particular time webView should be closed.

            So will it be feasible to use the code you have provided?

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            • C Offline
              C Offline
              ChrisW67
              wrote on last edited by
              #6

              Yes, using QTimer (in combination with QTime if necessary) in any number of ways.

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              • Z Offline
                Z Offline
                Zain
                wrote on last edited by
                #7

                Thanks ChristW67

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                • Z Offline
                  Z Offline
                  Zain
                  wrote on last edited by
                  #8

                  Hello

                  There is issue in when i am setting timer.

                  I have used code as:

                  timer->stop

                  this give exception: "Exception at 0x61a3a53f, code: 0xc0000005: read access violation at: 0x0, flags=0x0"

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                  • C Offline
                    C Offline
                    ChrisW67
                    wrote on last edited by
                    #9

                    The value of timer is null (0) or otherwise invalid, dereferencing a null pointer is bad.

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                    • Z Offline
                      Z Offline
                      Zain
                      wrote on last edited by
                      #10

                      I am unable to solve multhreading functionality to load video on multiple webview & set proxy for it for particular time.

                      Please tell better solution for this.

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