Can you add a toolbar to QDialog?

问题:

I'm working on a project that needs to call a modal window with a toolbar to do some work on some data before it's loaded. The reason I need the toolbar is the user has a few different possible options that can be combined.

The obvious choice here is a Modal dialog (which I have working right now). The issue is I want a toolbar. This is a two part question:

1. Is it possible to add a toolbar to a QDialog? (also is it possible to do this in Qt Designer?)
2. If 1. is not possible, how can I make a QMainWindow modal?

回答1:

If you don't need the built-in drag and drop feature of QMainWindow's toolbars, you can simply add a QToolBar to any layout, including QDialog's layout(). See the DigviJay Patil's answer below for details, which is definitely cleaner conceptually.

Otherwise, please read on.

---

1. It is not directly possible to add a QToolBar to a QDialog in the QMainWindow::addToolBar() sense, because QDialog inherits only QWidget and not QMainWindow, as you noted (hence do not have the method addToolBar())

2. You can't make a QMainWindow modal, but you can insert a QMainWindow in a QDialog this way:

Code:

MyDialog::MyDialog() :
    QDialog()
{
    QMainWindow * mainWindow = new QMainWindow(); // or your own class
                                                  // inheriting QMainWindow

    QToolBar * myToolBar = new QToolBar();
    mainWindow->addToolBar(myToolBar);

    QHBoxLayout * layout = new QHBoxLayout();
    layout->addWidget(mainWindow);
    setLayout(layout);
}

Indeed, a QMainWindow doesn't necessarily have to be a top-level widget, and you can even insert several QMainWindows as children of a single widget (may not be the wisest choice though, as the user would probably be confused with the separate sets of menu bars, toolbars, dock widgets, etc.).

回答2:

You can simply use the setMenuBar function of the layout manager that is installed on your QDialog:

myDialog->layout()->setMenuBar(myMenuBar);

回答3:

You can add QToolBar in QDialog. But as a QWidget. Please have a look

MyDialog::MyDialog(QWidget *parent) : QDialog(parent)
{
   QVBoxLayout *mainLayout = new QVBoxLayout(this);

   QToolBar *toolBar = new QToolBar();
   mainLayout->addWidget(toolBar);

   QAction *action1 = new QAction("Add", toolBar);
   QAction *action1 = new QAction("Del", toolBar);

  //Add What you want
}

As QToolBar is child of QWidget we can add it as Widget. Using Layout you can adjust its position. Please check this link http://developer.nokia.com/community/wiki/How_to_use_QToolBar_and_QToolButton_in_Qt