iterami/Docs.htm/common HTM Projects/core.js/core_handle_keydown(event)
- Updates the state of "core_key_shift".
- Does not call event todo if the control, alt, or meta keys are down, or if the pressed key is already down.
- Does not call event todo if the menu is open and blocking events, except for the "Escape" key.
- Calls "keydown" event todo().