gfxMouseButtonConstants

Use the gfxMouseButton constants with the MouseDown and MouseUp events.

gfxMouseButtonPrimary

(1) – the mouse button used to select objects. For a right-handed configuration, this is the left mouse button

gfxMouseButtonMiddle

(4) – the middle mouse button

gfxMouseButtonSecondary

(2) – the mouse button that brings up context menus. For a right-handed configuration, this is the right mouse button