Viewing Area (Control)

Provide a viewing area when a window is used to display user-provided or specified application-interpreted information. For example, text from a text file would be shown in the viewing area of a word-processing application.

If a window contains multiple viewing areas, and the user makes a choice that can apply to more than one view, apply it to the area that has focus. If no area has focus, then apply the choice to the area that has interacted emphasis. Otherwise, issue a warning signal.

Provide at least one viewing area in every primary window.

Place the viewing areas below the status area and menu bar and above the information area and command area.

Support both horizontal and vertical scrolling in each viewing area.

If more than one viewing area is to be displayed in a window, display them in panes of a paned box.

If more than one viewing area is to be displayed in a window, and some of them can be scrolled, support coordinated scrolling when appropriate.

When displaying a new instance of a view that contains a selection scope (for example, a new window or a split view), place the cursor in the same place in the new view selection scope as in the view it was derived from.

Support preferred discrete sizes or size increments for the viewing area if the element displayed in the viewing area has preferred discrete sizes or size increments.

If the contents of a view can be scaled when the size of the viewing area is changed, provide an option to specify whether to scale or clip the contents of the view.