Module: SDL2::Key::Mod

Defined in:
ext/sdl2_ext/key.c,
ext/sdl2_ext/key.c

Overview

This module has key modifier bitmask constants and some functions to handle key modifier states.

Constant Summary collapse

NONE =

0 (no modifier is applicable)

INT2NUM(KMOD_NONE)
LSHIFT =

the modifier key bit mask for the left shift key

INT2NUM(KMOD_LSHIFT)
RSHIFT =

the modifier key bit mask for the right shift key

INT2NUM(KMOD_RSHIFT)
LCTRL =

the modifier key bit mask for the left control key

INT2NUM(KMOD_LCTRL)
RCTRL =

the modifier key bit mask for the right control key

INT2NUM(KMOD_RCTRL)
LALT =

the modifier key bit mask for the left alt key

INT2NUM(KMOD_LALT)
RALT =

the modifier key bit mask for the right alt key

INT2NUM(KMOD_RALT)
LGUI =

the modifier key bit mask for the left GUI key (often the window key)

INT2NUM(KMOD_LGUI)
RGUI =

the modifier key bit mask for the right GUI key (often the window key)

INT2NUM(KMOD_RGUI)
NUM =

the modifier key bit mask for the numlock key

INT2NUM(KMOD_NUM)
CAPS =

the modifier key bit mask for the capslock key

INT2NUM(KMOD_CAPS)
MODE =

the modifier key bit mask for the mode key (AltGr)

INT2NUM(KMOD_MODE)
CTRL =

the modifier key bit mask for the left and right control key

INT2NUM(KMOD_CTRL)
SHIFT =

the modifier key bit mask for the left and right shift key

INT2NUM(KMOD_SHIFT)
ALT =

the modifier key bit mask for the left and right alt key

INT2NUM(KMOD_ALT)
GUI =

the modifier key bit mask for the left and right GUI key

INT2NUM(KMOD_GUI)
RESERVED =

reserved for future use

INT2NUM(KMOD_RESERVED)

Class Method Summary collapse

Class Method Details

.state ⇒ Integer

Get the current key modifier state

You can examine whether the modifier key is pressed using bitmask constants of SDL2::Key::Mod.

Returns:

  • (Integer) —

    key state



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# File 'ext/sdl2_ext/key.c', line 150

static VALUE Mod_s_state(VALUE self)
{
    return UINT2NUM(SDL_GetModState());
}

.state=(keymod) ⇒ keymod

Note:

This does not change the keyboard state, only the key modifier flags.

Set the current key modifier state

Parameters:

  • keymod (Integer) —

    key modifier flags (bits)

Returns:

  • (keymod)

See Also:



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# File 'ext/sdl2_ext/key.c', line 165

static VALUE Mod_s_set_state(VALUE self, VALUE keymod)
{
    SDL_SetModState(NUM2UINT(keymod));
    return Qnil;
}