Alternatives to QMenuBar::setCornerWidget() for Customizing Corners in Qt

• corner (optional): This argument specifies the corner where the widget should be placed. It defaults to Qt::TopRightCorner but you can also use Qt::TopLeftCorner to position it on the left.
• widget: This argument is a pointer to a QWidget object that you want to place in the corner. This can be any type of widget like a button, label, or even a custom widget you create.
• setCornerWidget(): This is a member function of QMenuBar used to set the corner widget.
• QMenuBar: This is the class representing the menubar itself.

• If you want a more platform-independent approach for adding widgets to the menubar, consider using a status bar (QStatusBar) instead.
• While setCornerWidget() offers customization, it's important to note that this feature might not be consistent across all platforms Qt runs on. The look and feel of the corner widget might differ depending on the operating system.

---

#include <QApplication>
#include <QtWidgets>

int main(int argc, char *argv[]) {
  QApplication app(argc, argv);

  // Create a main window
  QWidget window;

  // Create a menubar
  QMenuBar *menuBar = new QMenuBar(&window);
  window.setMenuBar(menuBar);

  // Create a simple button for the corner
  QPushButton *cornerButton = new QPushButton("Click Me!");

  // Add a menu (optional)
  QMenu *fileMenu = menuBar->addMenu(tr("&File"));
  fileMenu->addAction(tr("Exit"));

  // Set the button as the corner widget (Top Right by default)
  menuBar->setCornerWidget(cornerButton);

  window.show();

  return app.exec();
}

1. We include necessary Qt widgets header (QtWidgets).
2. The application object and a QWidget for the main window are created.
3. A QMenuBar is created and assigned to the window.
4. A QPushButton is created for the corner.
5. (Optional) A menu is added to the menubar for demonstration.
6. We call setCornerWidget() on the menuBar, passing the button pointer.

This code creates a window with a menubar containing a menu item ("Exit") and a button ("Click Me!") in the top right corner.

• To position the widget on the top left corner, use:
• You can replace the QPushButton with any other QWidget subclass based on your needs.

menuBar->setCornerWidget(cornerButton, Qt::TopLeftCorner);

---

1. Using a QStatusLabel
   

• You can add a QStatusLabel to the status bar (QStatusBar) of your window. The status bar typically resides at the bottom and provides a designated area for displaying information or widgets.

// ... (existing code for creating window and menubar)

// Create a status bar
QStatusBar *statusBar = new QStatusBar(&window);
window.setStatusBar(statusBar);

// Create a label for the corner
QLabel *cornerLabel = new QLabel("Custom Text Here");
statusBar->addWidget(cornerLabel, Qt::AlignRight);  // Align to right corner

// ... (remaining code)

This approach provides a more platform-independent solution for displaying information in the corner of your application window.

1. Custom QWidget Subclass
   

• Create a custom widget subclass that inherits from QWidget. Override the paintEvent() method to draw the desired content in the corner. You can then add this custom widget as a child of the QMenuBar using menuBar->addWidget().

Note
This approach requires more effort but offers complete control over the appearance and behavior of the corner element.

1. Third-party Libraries
   

• Explore third-party libraries like Qt Extended orיצוני that might offer more advanced features for customizing the menubar or adding widgets to specific locations within the window.

Choosing the Right Approach

The best alternative depends on your specific needs:

• Third-party libraries might be suitable if you need advanced features not readily available in Qt Widgets.
• If you require more complex customization or drawing functionalities, consider a custom widget subclass.
• For simple text or icon display, a QStatusLabel in the status bar is a good choice.