Worked on enhancing mouse event handling reliability in the eclipse-platform/eclipse.platform.swt repository, focusing on the GTK4 backend. Addressed inconsistencies in mouse input by ensuring accurate x and y coordinates were passed during mouse up events and implemented a fallback mechanism for double-click detection using mouse down events. This Java-based solution leveraged expertise in event handling, GTK4, and GUI development to reduce misregistered clicks and improve overall user experience. The work involved analyzing event propagation within the SWT framework and making targeted changes to the input handling logic, resulting in more precise mouse tracking and fewer interaction errors in GTK4 environments.