Plugin Dll with QWinWidget not showing any content



  • Hi,

    I'm trying to create a plugin for a Windows program and would like to use Qt. I found the Qt-winmigrate solution and tried it.

    I have no problem opening a QMessageBox like this:
    @QWinWidget win1( static_cast<HWND>(m_LocalPIWin) );
    win1.showCentered();
    QMessageBox::about( &win, "About QtMfc", "QtMfc Version 1.0\nCopyright (C) 2003" );@

    But when I try to create the QWinWidget with its children inside of the given parent I can't see any content.
    @HWND hWnd = static_cast<HWND>(m_LocalPIWin);
    QWinWidget win(hWnd);
    HWND winId = (HWND)win.winId();
    QHBoxLayout hbox(&win);
    hbox.setSpacing(5);
    hbox.setMargin(0);
    QPushButton *pb = new QPushButton("Qt command button", &win);
    pb->setObjectName("pb");
    hbox.addWidget(pb);
    QLabel *label = new QLabel("Some label", &win);
    label->setObjectName("label");
    hbox.addWidget(label);
    QLineEdit *le1 = new QLineEdit(&win);
    le1->setObjectName("le1");
    hbox.addWidget(le1);
    QLineEdit *le2 = new QLineEdit(&win);
    le1->setObjectName("le2");
    hbox.addWidget(le2);
    QLineEdit *le3 = new QLineEdit(&win);
    le1->setObjectName("le3");
    hbox.addWidget(le3);

    win.move(0, 0);
    win.show();
    
    ShowWindow(hWnd, SW_SHOWNORMAL);
    UpdateWindow(hWnd);@
    

    I'm pretty lost on this one. Any advise?


  • Lifetime Qt Champion

    Hi and welcome to devnet,

    Do you have a QApplication anywhere in your code prior to loading your plugin ?



  • Hi Omatic. I am running into the same problem as you. Did you ever find a solution to this?


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