+ /** @brief Resizes all clips in this group from start.
+ *@param diff Difference to startPos stored in m_resizeInfos */
+ void resizeStart(int diff);
+ /** @brief Resizes all clips in this group from end.
+ * @param diff Difference to endPos stored in m_resizeInfos */
+ void resizeEnd(int diff);
+ /** @brief Gets m_resizeInfos */
+ QList <ItemInfo> resizeInfos();
+ /** @brief Clears m_resizeInfos */
+ void clearResizeInfos();
+
+ /** @brief Gets the duration (length) of the group. */
+ GenTime duration();
+