Screen.lockCursor

Description

Should the cursor be locked?

The cursor will automatically be hidden, centered on view and made to never leave the view.

After the user presses escape or switches to another application the cursor will be automatically unlocked. The cursor lock will also be lost when exiting full screen mode. You can query if the cursor is currently locked by checking the lockCursor state. To provide a good user experience it is recommended to only lock the cursor as a result of pressing a button. Also you should check if the cursor got unlocked, in order to e.g. pause the game or bring up a game menu. In the Editor the cursor will automatically be unlocked when you press escape. In the Standalone Player you have full control over mouse locking thus it won't automatically lose mouse lock unless you switch applications.

var gt: GUITexture;

function Start() {
	gt = GetComponent.<GUITexture>();
}

// Called when the cursor is actually being locked

function DidLockCursor () {
	Debug.Log("Locking cursor");

	// Disable the button
	gt.enabled = false;
}

// Called when the cursor is being unlocked
// or by a script calling Screen.lockCursor = false;
function DidUnlockCursor () {
	Debug.Log("Unlocking cursor");

	// Show the button again
	gt.enabled = true;
}

function OnMouseDown () {
	// Lock the cursor
	Screen.lockCursor = true;
}

private var wasLocked = false;

function Update () {
	// In standalone player we have to provide our own key
	// input for unlocking the cursor
	if (Input.GetKeyDown ("escape"))
		Screen.lockCursor = false;

	// Did we lose cursor locking?
	// eg. because the user pressed escape
	// or because they switched to another application
	// or because some script set Screen.lockCursor = false;
	if (!Screen.lockCursor && wasLocked) {
		wasLocked = false;
		DidUnlockCursor();
	}
	// Did we gain cursor locking?
	else if (Screen.lockCursor && !wasLocked) {
		wasLocked = true;
		DidLockCursor ();
	}
}

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public GUITexture gt;
    void Start() {
        gt = GetComponent<GUITexture>();
    }
    void DidLockCursor() {
        Debug.Log("Locking cursor");
        gt.enabled = false;
    }
    void DidUnlockCursor() {
        Debug.Log("Unlocking cursor");
        gt.enabled = true;
    }
    void OnMouseDown() {
        Screen.lockCursor = true;
    }
    private bool wasLocked = false;
    void Update() {
        if (Input.GetKeyDown("escape"))
            Screen.lockCursor = false;
        
        if (!Screen.lockCursor && wasLocked) {
            wasLocked = false;
            DidUnlockCursor();
        } else
            if (Screen.lockCursor && !wasLocked) {
                wasLocked = true;
                DidLockCursor();
            }
    }
}