Apple Newton Utilities Guide de l'utilisateur télécharger pdf (Page 812)

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101

CHAPTER 22

Transport Interface

22-24 Using the Transport Interface

// vStatus subtype

:SetStatusDialog('Connecting, 'vStatus, "Looking for host...");

// vStatusTitle subtype

:SetStatusDialog('Connecting, 'vStatusTitle, {statusText: "Connecting

to host...", titleText: "Data set 4"});

// vConfirm subtype

:SetStatusDialog('Confirming, 'vConfirm, {statusText: "The host has a

new data set for you. Do you want to receive it now?",

secondary:{text:"Receive Data Set", script: func() ... },

primary:{text:"Disconnect Now", script: func() ... }});

// vProgress subtype

:SetStatusDialog('Sending, 'vProgress, {statusText: "Sending data

set...", titleText: "Data set 4", progress:40});

// vGauge subtype

:SetStatusDialog('Sending, 'vGauge, {statusText: "Sending data

set...", titleText: "Data set 4", gauge:40});

// vBarber subtype

:SetStatusDialog('Sending, 'vBarber, {statusText: "Sending data

set...", titleText:"Data set 4", barber:true});

Once the status view is open, each time you call SetStatusDialog, the system

closes and reopens all its child views. This is fairly fast, but if you just want to

update a progress indicator that is already visible in the subtypes

vProgress,

vGauge, or vBarber, you can use the alternate method UpdateIndicator.

This

protoStatusTemplate method updates the progress indicator child of the

status view: the page image for the

vProgress subtype, the horizontal bar for the

vGauge subtype, and animation of the barber pole for the vBarber subtype.

For example, you’d use

UpdateIndicator to update the vGauge subtype

as follows:

statusDialog:UpdateIndicator({name:'vGauge, values:{gauge: 50,}});

Note that the frame of data you pass to UpdateIndicator consists of two slots,

name and values, that hold the name of the subtype and the value(s) you want to

set, respectively. The

values slot is speciﬁed just like the values parameter to

SetStatusDialog.

Also, note that

UpdateIndicator is a method of protoStatusTemplate,

and you need to send this message to the open status view. A reference to the open

status view is stored in the

statusDialog slot of the transport frame, so you can

send the message to the value of that slot, as shown above.

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Apple Newton Utilities Guide de l'utilisateur Page 812

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