# Unigine::InputEventSystem Class (CPP)

**Header:** #include <UnigineInput.h>

**Inherits from:** InputEvent


This class controls system events such as changing the input language of the keyboard layout.


Events of this type are created by the engine and passed to your handlers. You can also construct one yourself and dispatch it via *[Input::sendEvent()](../../../api/library/controls/class.input_cpp.md#sendEvent_InputEvent_void)*, which is what a custom SystemProxy implementation or a device emulator does.


## InputEventSystem Class

### Enums

## ACTION

System event actions.
| Name | Description |
|---|---|
| **ACTION_KEYBOARD_LAYOUT_CHANGED** = 0 | Keyboard layout has changed. |

### Members

---

## InputEventSystem ( )

Default constructor.
## InputEventSystem ( unsigned int timestamp , const Math:: ivec2 & mouse_pos )

Default constructor.
### Arguments

- *unsigned int* **timestamp** - Timestamp of the event (time when the event occurred).
- *const  Math::[ivec2](../../../api/library/math/class.ivec2_cpp.md) &* **mouse_pos** - Coordinates of the mouse cursor position along X and Y axes.

## InputEventSystem ( unsigned int timestamp , const Math:: ivec2 & mouse_pos , InputEventSystem::ACTION action )

Default constructor.
### Arguments

- *unsigned int* **timestamp** - Timestamp of the event (time when the event occurred).
- *const  Math::[ivec2](../../../api/library/math/class.ivec2_cpp.md) &* **mouse_pos** - Coordinates of the mouse cursor position along X and Y axes.
- *[InputEventSystem::ACTION](../../../api/library/controls/class.inputeventsystem_cpp.md#ACTION)* **action** - action of the system event.

## void setAction ( InputEventSystem::ACTION action )

Sets the action the event represents. See *[getAction()](../../...md#getAction_int)*.
### Arguments

- *[InputEventSystem::ACTION](../../../api/library/controls/class.inputeventsystem_cpp.md#ACTION)* **action** - New action to be set for the system event.

## InputEventSystem::ACTION getAction ( ) const

Returns the action the event represents: one of the [ACTION](#ACTION) values. Currently the only system event reported is a change of the keyboard layout.
### Return value

Current system event action.