Popup window Mac OS in Qt - c++

Question

Can I make on Qt is popup window?
I do not know exactly how it is called.

Answer 1

You can use a QSystemTrayIcon. That creates a tray icon in the taskbar, which is where the notification will come from. To show the notification, use the showMessage method. This method takes two QString parameters, the first one being the title and the second one being the message. For example, the following code shows a "Hello World!" message with "Title" as title:
QSystemTrayIcon *trayIcon = new QSystemTrayIcon(button);
trayIcon->setIcon(QIcon("image.png"));
trayIcon->show();
trayIcon->showMessage("Title", "Hello World!");
You must set the tray icon's icon by using the setIcon method, otherwise it won't work. You also have to show the tray icon with the show method. You can also do something when the message is clicked on with the messageClicked signal.
Here is a complete example of a program where clicking on a button will show the message, and clicking on the message will show a normal message box:
#include <QApplication>
#include <QtWidgets>
int main(int argc, char **argv){
QApplication app(argc, argv);
QPushButton button("Show message");
QSystemTrayIcon trayIcon;
QObject::connect(&button, &QPushButton::clicked, [&trayIcon](){
trayIcon.showMessage("Title", "Hello World!"); //Show the popup when the button is clicked on
});
QObject::connect(&trayIcon, &QSystemTrayIcon::messageClicked, [](){
QMessageBox::information(nullptr, "", "Message Clicked"); //Show a message box when the popup is clicked on
});
trayIcon.setIcon(QIcon("image.png")); //Set the tray icon icon to image.png
trayIcon.show(); //Show the tray icon
button.show(); //Show the button
return app.exec();
}
Here is the result on Windows:
And here is the result on Mac:
I've circled the tray icon on both screenshots so that you can see what a tray icon looks like. Try clicking on the popups to see what happens. You can play around with the code to change the messages and the image to really understand how the code works.

Answer 2

You can use QMenu, QActions and the TrayIcon to do this.
void Window::createTrayIcon(){
TrayIconMenu = new QMenu(this);
TrayIconMenu->addAction(MinimizeAction);
TrayIconMenu->addAction(MaximizeAction);
TrayIconMenu->addAction(RestoreAction);
TrayIconMenu->addSeparator();
TrayIconMenu->addAction(QuitAction);
TrayIcon = new QSystemTrayIcon(this);
TrayIcon->setContextMenu(TrayIconMenu);
}
I'm not sure how to get the exact format of that rounded bubble though. That might not be a feature Qt has.