Is there a way to prevent the hide operation of a toolbar?

Question

In Qt, if I right-click on a toolbar the menu will be shown that allows me to hide the toolbar. I need to disable this functionality because I don't want the toolbar to possible to hide. Is there a way to do this?

Repute

Answer 1

Inherit QToolbar and reimplement contextMenuEvent().

Whoever

Just to contribute with the answer (5 years later): you can avoid the inheritance by installing a filter event, and retaining the event (return true): qt-project.org/doc/qt-5/eventsandfilters.html#event-filters – Serrano

This answer would really benefit from an example. – Connell

Answer 2

I was able to set the ContextMenuPolicy directly on the toolbar (not the main window), as long as I used either Qt::PreventContextMenu or Qt::ActionsContextMenu. Prevent eliminated the context menu and made right-click have no effect on the toolbar, while Actions made a nice context menu composed of the actions already in my toolbar. Qt::NoContextMenu didn't seem to have any effect.

toolbar->setContextMenuPolicy(Qt::PreventContextMenu);

Robichaux

This works, but you have to be aware that you're only preventing the context menu to appear for this one tool bar. If the user triggers the context menu anywhere else (like on another tool bar or a dock widget title bar), he will still be able to hide your "unhidable" tool bar. – Caisson

Answer 3

Use setContextMenuPolicy (Qt::NoContextMenu) for the main window of the toolbar.

Pah

I mistyped and corrected it. NoContextMenu should be for the main window, not the toolbar. – Pah

Strange.. why does setting it on the QToolBar itself not work? – Mean

Interestingly, if you set contextMenuPolicy of the toolbar to NoContextMenu, the context menu still appears. BUT if you set it to CustomContextMenu and don't implement a custom context menu function, no context menu appears... strange. – Hornet

Answer 4

There are several ways to achieve this without having to alter the contextMenu functionality. See the following 3 PySide examples:

1. Disable the toggleViewAction of the QToolBar:

UnhidableToolBar = QToolBar()
UnhidableToolBar.toggleViewAction().setEnabled(False)

2. Connect to the visibilityChanged signal:

toolbar.visibilityChanged.connect(lambda: toolbar.setVisible(True))

3. Subclass QToolBar and use the hideEvent:

class UnhideableQToolBar(QToolBar):
    def hideEvent(self, event):
        self.setVisibile(True)

Recommendation:

While 2 & 3 are pretty dirty, solution 1 shows the toolbar in the context menu like a QDockWidget that has the feature DockWidgetClosable set. So either use solution 1 or if you want to remove the action have a look at Steven's answer.

Pome

Answer 5

Override QMainWindow::createPopupMenu() e.g.

QMenu* MyApp::createPopupMenu()
{
  QMenu* filteredMenu = QMainWindow::createPopupMenu();
  filteredMenu->removeAction( mUnhidableToolBar->toggleViewAction() );
  return filteredMenu;
}

Note that the other answers that suggest disabling the context menu will only work if you want to disable hiding/showing of all toolbars and all dock widgets.

Elvaelvah

Nice, clean answer. Tip: You can avoid keeping track of all added toolbars by searching for QToolbar children in createPopupMenu. Looking in direct children of the QMainWindow only seems to work. – Lusk

Answer 6

The simplest thing to do is:

self.toolbar.toggleViewAction().setVisible(False)

Unlike self.toolbar.toggleViewAction().setEnabled(False), which still shows the disabled popup if you're right-clicking the toolbar for any reason.

Hart