mouseMoved

mouseMoved is an event that is triggered in graphical user interface programming when the user moves the mouse pointer. This event is typically part of a larger event handling system, common in frameworks like Java Swing, JavaFX, or various web browser JavaScript APIs. When a mouseMoved event occurs, it signifies that the cursor's position on the screen has changed.

The event object associated with mouseMoved usually contains information about the new coordinates of the mouse pointer relative to the screen, a window, or a specific component. This data allows developers to react to the mouse's movement. Common uses include updating a graphical display based on the pointer's position, providing real-time feedback to the user, or triggering actions like highlighting interactive elements as the mouse hovers over them.

Unlike mouseDragged events, mouseMoved fires even when no mouse button is held down. This distinction is important because it allows for distinct behaviors. For example, a drag operation might require a button press, while simple hovering effects can be achieved solely through mouseMoved events. The frequency at which mouseMoved events are generated can vary depending on the operating system and hardware, but it generally reflects the smoothness of the user's mouse movement.