*/
float GetScrollAmountByUserInput();
+ /**
+ * @brief Get latest scroll amount, control size and layout size
+ *
+ * This method is used to get information of control's scroll
+ * @param[out] scrollPosition The current scrolled position
+ * @param[out] controlHeight The size of a UI control
+ * @param[out] layoutHeight The size of a bounding box to layout text within.
+ *
+ * @return Whether the text scroll position is changed or not after last update.
+ */
+ bool GetTextScrollInfo( float& scrollPosition, float& controlHeight, float& layoutHeight );
+
public: // Relayout.
/**