Input

The windows resized since the last update_window_events.

for get_window_resizes() print("% x %\n", it.width, it.height);
assert(get_window_resizes().count == 0);

The windows moved since the last update_window_events.

assert(get_window_moves().count == 0);

Records a resize for get_window_resizes. The window backends call it; programs rarely need to.

Starts a new frame: drops this frame's events and resize or move records, zeroes the mouse deltas and clears the START and END flags while keeping DOWN. update_window_events calls it first.

input_button_states[Key_Code.SPACEBAR] = .DOWN | .START;
input_per_frame_event_and_flag_update();
assert(input_button_states[Key_Code.SPACEBAR] == .DOWN);

Maps an X11 key symbol to a Key_Code.

Tells the library whether the program manages the mouse cursor itself.

Collects the events of all windows into events_this_frame and the button states. Call once per frame.

The window procedure behind every window; it turns Win32 messages into events.

What kind of thing an Event reports.

What happened to the window, for events of type .WINDOW.

The state of a key or button this frame. DOWN lasts while it is held; START and END are set only on the frame it went down or up.

state := Key_Current_State.DOWN | .START;
assert((state & .START) != 0);
assert((state & .END) == 0);

One input event. Check type first; it decides which other fields mean anything: key_code and repeat for .KEYBOARD, utf32 for .TEXT_INPUT, wheel_delta for .MOUSE_WHEEL, files for .DRAG_AND_DROP_FILES, and so on. The modifier flags (shift_pressed, ctrl_pressed, alt_pressed, cmd_meta_pressed) apply to every event.

event: Event;
event.type = .KEYBOARD;
event.key_code = .ENTER;
event.shift_pressed = true;
assert(event.key_code == .ENTER && event.packed != 0);

The state and position of one finger on a touch screen.

A window's new size, from get_window_resizes.

A window's new position, from get_window_moves.

Keys, mouse buttons and gamepad buttons. Printable keys use their ASCII value, upper case for letters (#char "A" is the A key); the rest have names. Index input_button_states with it.

assert(cast(u32) Key_Code.ENTER == 13);
assert(cast(Key_Code) #char "A" != .UNKNOWN);