tk2dButton.coHandleButtonPress C# (CSharp) Method

    IEnumerator coHandleButtonPress(int fingerId)
    {
        buttonDown = true; // inhibit processing in Update()
        bool buttonPressed = true; // the button is currently being pressed

        Vector3 defaultScale = transform.localScale;

        // Button has been pressed for the first time, cursor/finger is still on it
        if (targetScale != 1.0f)
        {
            // Only do this when the scale is actually enabled, to save one frame of latency when not needed
            yield return StartCoroutine( coScale(defaultScale, 1.0f, targetScale) );
        }
        PlaySound(buttonDownSound);
        if (buttonDownSpriteId != -1)
            sprite.spriteId = buttonDownSpriteId;

        if (ButtonDownEvent != null)
            ButtonDownEvent(this);

        while (true)
        {
            Vector3 cursorPosition = Vector3.zero;
            bool cursorActive = true;

            // slightly akward arrangement to keep exact backwards compatibility
        #if !UNITY_FLASH
            if (Input.multiTouchEnabled)
            {
                bool found = false;
                for (int i = 0; i < Input.touchCount; ++i)
                {
                    Touch touch = Input.GetTouch(i);
                    if (touch.fingerId == fingerId)
                    {
                        if (touch.phase == TouchPhase.Ended || touch.phase == TouchPhase.Canceled)
                            break; // treat as not found
                        cursorPosition = touch.position;
                        found = true;
                    }
                }

                if (!found) cursorActive = false;
            }
            else
        #endif
            {
                if (!Input.GetMouseButton(0))
                    cursorActive = false;
                cursorPosition = Input.mousePosition;
            }

            // user is no longer pressing mouse or no longer touching button
            if (!cursorActive)
                break;

            Ray ray = viewCamera.ScreenPointToRay(cursorPosition);

            RaycastHit hitInfo;
            bool colliderHit = collider.Raycast(ray, out hitInfo, 1.0e8f);
            if (buttonPressed && !colliderHit)
            {
                if (targetScale != 1.0f)
                {
                    // Finger is still on screen / button is still down, but the cursor has left the bounds of the button
                    yield return StartCoroutine( coScale(defaultScale, targetScale, 1.0f) );
                }
                PlaySound(buttonUpSound);
                if (buttonUpSpriteId != -1)
                    sprite.spriteId = buttonUpSpriteId;

                if (ButtonUpEvent != null)
                    ButtonUpEvent(this);

                buttonPressed = false;
            }
            else if (!buttonPressed & colliderHit)
            {
                if (targetScale != 1.0f)
                {
                    // Cursor had left the bounds before, but now has come back in
                    yield return StartCoroutine( coScale(defaultScale, 1.0f, targetScale) );
                }
                PlaySound(buttonDownSound);
                if (buttonDownSpriteId != -1)
                    sprite.spriteId =  buttonDownSpriteId;

                if (ButtonDownEvent != null)
                    ButtonDownEvent(this);

                buttonPressed = true;
            }

            if (buttonPressed && ButtonAutoFireEvent != null)
            {
                ButtonAutoFireEvent(this);
            }

            yield return 0;
        }

        if (buttonPressed)
        {
            if (targetScale != 1.0f)
            {
                // Handle case when cursor was in bounds when the button was released / finger lifted
                yield return StartCoroutine( coScale(defaultScale, targetScale, 1.0f) );
            }
            PlaySound(buttonPressedSound);
            if (buttonPressedSpriteId != -1)
                sprite.spriteId = buttonPressedSpriteId;

            if (targetObject)
            {
                targetObject.SendMessage(messageName);
            }

            if (ButtonUpEvent != null)
                ButtonUpEvent(this);

            if (ButtonPressedEvent != null)
                ButtonPressedEvent(this);

            // Button may have been deactivated in ButtonPressed / Up event
            // Don't wait in that case
        #if UNITY_3_0 || UNITY_3_1 || UNITY_3_2 || UNITY_3_3 || UNITY_3_4 || UNITY_3_5 || UNITY_3_6 || UNITY_3_7 || UNITY_3_8 || UNITY_3_9
            if (gameObject.active)
        #else
            if (gameObject.activeInHierarchy)
        #endif
            {
                yield return StartCoroutine(LocalWaitForSeconds(pressedWaitTime));
            }

            if (buttonUpSpriteId != -1)
                sprite.spriteId = buttonUpSpriteId;
        }

        buttonDown = false;
    }