Modifier Flags
Modifier flags are sent during mouse and keyboard events and indicate which option keys are currently down. Defined in <XModifiers.h>, these constants are:
KKeyShift Shift key down KKeyControl Control key down KKeyCommand (Macintosh) Command (Apple) key is down KKeyOption (Macintosh) Option key is down KKeyMenu (Windows) Alt key is down. KKeyMod1 (X) First modifier key is down KKeyMod2 (X) Second modifier key is down KKeyMod3 (X) Third modifier key is down KKeyMod4 (X) Fourth modifier key is down KKeyMod5 (X) Fifth modifier key is down KKeyButton Mouse button is down (left button) KKeyRButton Right mouse button down KKeyMButton Middle mouse button down KKeyButton2 (X) Second (right) mouse button down KKeyButton3 (X) Third (middle) mouse button down KKeyButton4 (X) Fourth mouse button down KKeyButton5 (X) Fifth mouse button down KDoubleClick (Mouse Event Only) Mouse double click. KCapturedMouse (Mouse move, up only) Mouse was captured. (This is done by returning true from XGView::DoMouseDown.) KSpecialKey (Key event only) A "special" (or non-ASCII) key was pressed. The following constants are equal, and can be used to simplify porting applications.
KKeyCommand KKeyMod1 KKeyOption KKeyMenu, KKeyMod2 KKeyMenu KKeyOption, KKeyMod2 KKeyMod1 KKeyCommand KKeyMod2 KKeyOption, KKeyMenu KKeyRButton KKeyButton2 KKeyMButton KKeyButton3 KKeyButton2 KKeyRButton KKeyButton3 KKeyMButton These equivalencies simplfy porting applications by allowing someone to write code which accepts 'KKeyOption' keyboard presses, knowing that on Windows this will be the equivalent to the Alt key and to the second modifier key on X.