3. Soft keys usage
TC-430™ comes with 5 programmable “soft keys” whose functions depend on the context of the application.
The current function of soft keys is shown in the bottom area of the touch-screen.
Every soft key can have up to two distinct function (the so-called “primary function” and “secondary
function”).
Both functions are reported on the soft keys description area in the touch-screen, the secondary function
being written smaller). Soft keys having a secondary function are marked with a ticker bottom border.
Figure 3: Soft keys
Looking at Figure 3, for example, the leftmost soft key has two functions (“Dest A” as primary function and
“Set” as secondary function) while the central soft key has one function only (named “Inversion”).
The primary function of a soft key is accessed by simply pressing the soft key (or tapping its description on
the touch-screen) while the secondary function is accessed by holding the soft key (or by tapping and
holding its description on the touch-screen). While holding a soft key which has a secondary function, an
animated blue bar is shown over the soft key description, in order to provide a feed-back to the user of the
on-going process. Once the animation completes (the bar fills the soft key description) then the secondary
function of the soft key is fired (Figure 4).
Figure 4: Holding a soft key
If the soft key is released before the animation completes, then the action is cancelled.
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