Apple Newton Utilities Guide de l'utilisateur télécharger pdf (Page 639)

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CHAPTER 17

Additional System Services

Using Additional System Services 17-23

And be sure to include this in your application’s ViewQuitScript to get rid of

the notify icon’s action:

if theNotifyIconAction then

begin

GetRoot().notifyIcon:KillAction(theNotifyIconAction);

theNotifyIconAction := nil;

end;

Opening the Status Slip 17

To instantiate a status slip view from its template, pass the template to the

BuildContext function, as shown in the following code fragment:

statusView := BuildContext(myStatusTemplate);

You should use only the BuildContext function to instantiate this template.

Next, you need to initialize the view. If your status view template provided an

initialSetup slot containing a setup frame, the system uses the frame in this

slot to perform this initialization automatically. Otherwise, you need to set some

initial values for the status view from within its

ViewSetupDoneScript

method. Pass the

ViewSet method a setup frame, as described in ViewSet in

Newton Programmer’s Reference.

Once the view has been initialized, send it the

Open message to display it, as in the

following code fragment:

statusView:Open();

Reporting Progress 17

Once your status slip is open you can perform the task on which you report

progress. You should structure the task to alternate between performing some work

and updating the status slip.

You can use the status slip’s

UpdateIndicator method to update the gauge

view only, as in the following example:

statusView:UpdateIndicator({values:{gauge: 50}});

To update other items in the status slip, you need to use the ViewSet method.

Although you can use the

ViewSet method to initialize all the status slip’s

components, you need not always pass all of these values. Once the status slip is

open you need only pass to this method the values to be changed.

statusView:ViewSet({

name: 'vGauge,

values: {statusText: "Waiting for host...",

gauge: 30} // 30% filled

});

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Apple Newton Utilities Guide de l'utilisateur Page 639

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