Show exposé/"All Application Windows" from the dock

Is there anyway to show all the windows for one application (aka Exposé) from the window icon on the launcher? I know it is possible by right-clicking on the icon and then "Show All Windows", but I wanted a more direct way, for example: - Long pressing on the app icon to show exposé; or - Double-clicking the icon; or - Shift/Command/... + click; or - If the application is already on focus, clicking its icon on the dock will show exposé. Is this possible?