mouseReleaseEvent

The mouseReleaseEvent is a signal in Qt that is emitted when a mouse button is released. This event is typically used to handle user interaction with graphical user interface (GUI) elements that respond to mouse clicks, such as buttons or sliders.

Here is an example of handling the mouseReleaseEvent in a custom Qt widget:

class MyWidget : public QWidget {
    Q_OBJECT

public:
    MyWidget(QWidget *parent = nullptr) : QWidget(parent) {}

protected:
    void mouseReleaseEvent(QMouseEvent *event) override {
        // handle the mouse release event
        // event->pos() gives the position of the mouse cursor
        // event->button() gives the button that was released
    }
};

In this example, we override the mouseReleaseEvent function in our custom widget and add our own event handling code. The function receives a QMouseEvent object, which provides information about the mouse event, such as the position of the mouse cursor and the button that was released.

We can then use this information to perform some action, such as updating the state of our widget or triggering some other functionality.