Input Devices

Abstraction of common input devices.

Keyboard and mice

The Keyboard and Mouse entities are automatically created by implementation systems. They represent devices for the currently focused window:

using World world = new();
while (true)
{
    if (Entity.TryGetFirst(world, out Keyboard keyboard))
    {
        if (keyboard.IsPressed(Keyboard.Button.G))
        {
            //g is held
        }
        else if (keyboard.WasPressed(Keyboard.Button.Escape))
        {
            //escape was pressed
        }
    }

    if (Entity.TryGetFirst(world, out Mouse mouse))
    {
        Vector2 position = mouse.Position;
        Vector2 scroll = mouse.Scroll;
    }
}

Global keyboard and mouse

In addition to the above, there are GlobalKeyboard and GlobalMouse entities that must be created manually. These receive inputs regardless of windowing focus, and are useful for implementing global hotkeys:

using World world = new();
GlobalKeyboard globalKeyboard = new(world);
while (true)
{
    if (globalKeyboard.IsPressed(Keyboard.Button.G))
    {
        //g is held
    }
    else if (globalKeyboard.WasPressed(Keyboard.Button.Escape))
    {
        //escape was pressed
    }
}

Both of these device entities can be implictly cast to Keyboard and Mouse respectively.