Control apparatus and method of selecting a graphical object and changing display attributes thereof

Abstract

A method of quickly displaying a truly intended graphical object among graphical objects hidden in complex in the screen by a simple mouse operation. A group of graphical objects which are a set of a plurality of graphical objects is displayed on a display screen. Each graphical object is managed by a hierarchical structure and displayed in the display screen based on graphical definition data. When an operator selects one graphical object from a group of graphical objects, an operation tablet is generated. When the operator moves a pointer to the right on the operation tablet, graphical objects positioned fore side are changed to non-display one after another and a graphical object hiding behind them is revealed. By moving the pointer downwardly after the operator clicks the left button of a mouse, graphical objects of the same hierarchy as the focused graphical object are changed to non-display in unison so that a desired graphical object can be efficiently searched for selection.

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