Qt showing a dialog as frameless when called from main window

Question

I am learning qt and was trying an example from book, where we have to call pre-made dialogs from main window application.

I already made a dialog which will be used to enter a string(lets call it findDialog), the entered string is passed to a custom slot in QTableWidget to search for the entered string.

I can call the dialog as soon as an action called "find" is triggered, but the problem is that the dialog is shown as frameless.

I am calling the dialog like this, please point out any mistakes.

void MainWindow::find()
{
    // Check whether findDialog is already created
    if(!finddialog)
    {
        // create find dialog as a child to main window
        finddialog = new findDialog(this);
        // Connecting signals and slots 
     connect(finddialog,SIGNAL(forwardSearch(QString,Qt::CaseSensitivity)),
        sheetObject,SLOT(forwardSearch(QString,Qt::CaseSensitivity)));
      connect(finddialog,SIGNAL(backwardSearch(QString,Qt::CaseSensitivity)),
        sheetObject,SLOT(backwardSearch(QString,Qt::CaseSensitivity)));
    }
    // Show dialog
    finddialog->show();

    finddialog->move(200,200);
    // Raise if minimised
    finddialog->raise();
    // Activate it
    finddialog->activateWindow();
}

I cannot use exec because, i haven't connected accept() slot in findDialog to anything.

I am also attaching a picture showing the dialog when it has been called. Please tell me the mistake i have done and how to show the dialog with frame.

Answer 1

Got it,

I have to set window flags using setWindowFlags before showing the dialog.

finddialog->setWindowFlags(Qt::Dialog);

to show it as a dialog

                  or

finddialog->setWindowFlags(Qt::Window);

to show it as a window

Answer 2

You must create finddialog with appropriate Qt::WindowFlags . See documentation: Qt::WindowFlags . For example:

finddialog = new findDialog(this, Qt::Window);

Indicates that the widget is a window, usually with a window system frame and a title bar, irrespective of whether the widget has a parent or not. Note that it is not possible to unset this flag if the widget does not have a parent.

Also useful example .