Apple Computer Network Router 2 User Manual download pdf (Page 115)

CHAPTER 3

Controls

Hot Spots 3-21

Figure 3-20 A slider used for data input

Hot Spots 3

Some views need to have many small, unnamed controls that respond like

buttons when tapped. For example, a view that contains a map might

respond to a user tapping a place on the map by displaying information

about the place tapped. These hot spots may be visible or transparent.

Make it clear what elements of a view are hot spots unless you want to hide

them from users. If space and design considerations permit, give hot spots a

distinctive look that users can learn means “tap here.” Simple geometric

shapes—such as circles, squares, and triangles—are possibilities. When a

user taps a visible hot spot, highlight it to provide feedback. Users need

feedback to reassure them that they have really tapped the hot spot.

Hot spots that are very small and close together may have to be invisible to

avoid cluttering the view they’re in. Feedback is very important with small

invisible hot spots, because a user can’t be sure which hot spot he or she is

tapping. One possibility is to display a list of all the hot spots near where the

user tapped, and let the user select one of the listed spots by tapping it in the

list. If the user taps a place where there aren’t any nearby hot spots (a “cold”

spot), the application can provide feedback by listing one item that explains

the situation, such as “Nothing here.” Figure 3-21 shows how the Time Zones

application responds when a user taps one of its invisible hot spots.

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Apple Computer Network Router 2 User Manual Page 115