Apple Newton Utilities Guide de l'utilisateur télécharger pdf (Page 686)

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101

CHAPTER 19

Built-in Applications and System Data

19-12 Dates

Deleting Meetings and Events 19

The Dates application provides three methods for deleting meetings or events:

DeleteAppointment, DeleteRepeatingEntry, and DeleteEvent.

These three methods all take the same parameters, as in

DeleteAppointment(mtgTextOrFrame,mtgStartDate,deleteOneOnly). The

meeting or event to be deleted can be identified in one of two ways:

■ By matching the title (in the mtgTextOrFrame parameter) and the start date (in

the

mtgStartDate parameter) of the meeting or event.

■ By passing in a meeting frame for the mtgTextOrFrame parameter. A meeting

frame can be obtained either by calling one of two searching methods

(

FindAppointment or FindExactlyOneAppointment) described in

“Finding Meetings or Events” (page 19-13), or by querying one of the Dates

soups, described in “Dates Soup Formats” (page 16-56) in Newton

Programmer’s Reference.

As is explained in “Using the Dates Soups” (page 19-22), repeating meetings and

events are stored as a single soup entry (meeting frame) in either the “Repeat

Meetings” or “Repeat Notes” soups. Calling

DeleteAppointment or

DeleteEvent with a meeting title and start date (as in the first bullet above)

deletes only that instance of a repeating meeting or event. However, calling one of

these methods with a meeting frame (as in the second bullet above) stored in one of

these two soups deletes the entire series.

DeleteRepeatingEntry deletes the

entire series of repeating events or meetings, regardless of whether a meeting frame

or the title and start date of an event or meeting is used.

Here are some examples of deleting meetings or events of different types:

■ To delete a meeting by title/start time:

GetRoot().calendar:DeleteAppointment ("lunch with Ellen",

StringToDate("6/30/95 11:30am"), true);

■ To delete the same meeting passing in a meeting frame returned by

FindExactlyOneAppointment:

GetRoot().calendar:DeleteAppointment

(GetRoot().calendar:FindExactlyOneAppointment

("lunch with Ellen",

nil,

StringToDate("6/30/95 11:30am"),

'Meeting),

nil, // these last two params. are ignored when

nil); // supplying a meeting frame.

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