protected void updateTouchAreaSize() {
        if (mTouchMode == TOUCH_MODE_BEZEL) {
            mTouchSize = mTouchBezelSize;
        } else if (mTouchMode == TOUCH_MODE_FULLSCREEN) {
            mTouchSize = getMeasuredWidth();
        } else {
            mTouchSize = 0;
        }
    }
Compute the touch area based on the touch mode.
menudrawer/src/net/simonvt/menudrawer/MenuDrawer.java