| 摘要 |
In some example embodiments, a machine-readable medium provides instructions which, when executed by a machine, cause said machine to perform operations. The operations include displaying nodes in N number of levels of a first hierarchy tree on a display. The operations also include receiving input of a selected node of the nodes to open a level below the N number of levels of the first hierarchy tree. The operations include fading out a number of nodes at a highest level of the N number of levels from the first hierarchy tree. The operations include fading in at least one node of the number of nodes at the highest level of the N number of levels into the second hierarchy tree. Also, the operations include fading in at least one node at a level below the selected node into the first hierarchy tree on the display. |
