How Can I Read Individual Keyboard Keypresses in Go Without Waiting for Return?

Reading Keyboard Input in Go

Handling keyboard input in Go poses a unique challenge as the standard ReadString function requires a return key to be pressed before reading input. To overcome this limitation, alternative approaches are necessary to capture keypress events individually.

One promising solution lies in leveraging game engine libraries, such as Azul3D's keyboard library. Game engines often provide platform-agnostic input handling, enabling you to register callbacks for various keystrokes.

For example, using the keyboard library, you can create a watcher that monitors the state of all keys:

watcher := keyboard.NewWatcher()

Subsequently, you can query the watcher to obtain the state of a specific key, such as the left arrow key:

status := watcher.States()
left := status[keyboard.ArrowLeft]

If the key is being pressed down, the state will be set to "Down":

if left == keyboard.Down {
    // The arrow to left is being held down
    // Do something!
}

By iterating through the map returned by the watcher, you can identify all currently pressed keys and respond accordingly.

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