Apple Newton Utilities Guia do Utilizador descarregar pdf (Página 275)

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CHAPTER 7

Controls and Other Protos

Time Protos 7-15

Figure 7-22 A protoNewSetClock view

■ The protoSetClock time proto also displays an analog clock with which the

user can set a time value. Although this proto is still available for use, it has

been updated to the

protoNewSetClock, which you should use instead.

■ The protoAMPMCluster time proto displays A.M. and P.M. radio buttons in a

protoNewSetClock view. For more information about the slots and methods

for this proto, see “protoAMPMCluster” (page 6-44) in Newton Programmer’s

Reference. Figure 7-23 shows an example of a

protoAMPMCluster view.

Figure 7-23 A protoAMPMCluster view

Implementing a Simple Time Setter 7

To implement a time setter, deﬁne your template with the proto that you want

to use, specify the initial time value to show in the clock, and deﬁne the

TimeChanged method. You might also need to define additional slots or messages,

as described in “Time Protos” (page 6-38) in Newton Programmer’s Reference.

The following example is a template that uses

protoDigitalClock to allow the

user to specify a time:

clock := {...

_proto: protoDigitalClock,

time: 0,

TimeChanged: func()

begin

// add your code to respond to time change

print(time);

end,

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