Ladybug is an object-oriented MPEG player. Users view the mpeg object through a window objcet and select the demanded commands or operations by menu, button, and dialog box. The mouse and keyboard are the main pointer devices. After running the ladybug, a window object is displayed on the screen. It includes can be used to close the object and resize the window.
Users can point at the title bar and drag the window to relocate.
It is also an interactive area that users can active a pop-up menu to operate on the object. There are a list of in a menu that represent the commands. In the Ladybug pop-up menu is the efficient interactive tools to view and command an object. In this way Ladybug demonstrates the principle of display on demand. Pop-up menu is displayed at the current location of the mouse cursor, this eleminates the need to navigate the mouse to get commands.