Qt windows system menu

Please download a browser that supports JavaScript, or enable it if it's disabled i. I have simple dialog based qt application. I want to assign and display application version but there is no standard menu to get to the version dialog.

How do I add one and implement it? I know I could do QMessageBox::about to show the information, where is the menu item to implement? Without seeing your code I'm guessing at best but when you are looking at your form in the Qt Creator editor if you are doing it that way the menu bar is at the top.

To put items in the menu you use the "Action editor" at the bottom. To me its a little backward. First you add an action, then you have to drag it from the action editor up to the menu bar and it will change to used. Once you've done that you can right click on any of the actions in the Action Editor and select goto slot. Triggered will take you to code where you can implement a call to your about box. BTW I don't think there is a default or standard about box.

Which operating system? It will surely be platform-specific if possible at all. Oh, sorry. For Windows, but hopefully a cross-platform solution exists. Add a comment. Active Oldest Votes. Improve this answer. IMAN4K 1, 3 3 gold badges 21 21 silver badges 38 38 bronze badges. Thanks for this idea. Unfortunately, your Windows code snippet works like the Qt case -- once the system menu disappears, so does the caption buttons. Yes, they do. You can get away with having a close button on the caption, however.

I'll clear that up. The close button disappears also. Sign up or log in Sign up using Google. Sign up using Facebook. QMainWindow provides a main application window, with a menu bar, tool bars, dock widgets and a status bar around a large central widget. In this example, we will see how to implement pull-down menus as well as a context menu.

In order to implement a custom context menu we must reimplement QWidget 's contextMenuEvent function to receive the context menu events for our main window. We must also implement a collection of private slots to respond to the user activating any of our menu entries. Note that these slots are left out of this documentation since they are trivial, i. We have chosen to simplify the constructor by implementing two private convenience functions to create the various actions, to add them to menus and to insert the menus into our main window's menu bar.

Finally, we declare the various menus and actions as well as a simple information label in the application wide scope.

The QMenu class provides a menu widget for use in menu bars, context menus, and other popup menus while the QAction class provides an abstract user interface action that can be inserted into widgets.

In some situations it is useful to group actions together, e. One simple way of achieving this is to group the actions together in an action group using the QActionGroup class. In the constructor, we start off by creating a regular QWidget and make it our main window's central widget. Note that the main window takes ownership of the widget pointer and deletes it at the appropriate time.

Then we create the information label as well as a top and bottom filler that we add to a layout which we install on the central widget.

QMainWindow objects come with their own customized layout and setting a layout on a the actual main window, or creating a layout with a main window as a parent, is considered an error. You should always set your own layout on the central widget instead. To create the actions and menus we call our two convenience functions: createActions and createMenus. We will get back to these shortly.

QMainWindow 's statusBar function returns the status bar for the main window if the status bar does not exist, this function will create and return an empty status bar.