Apple Newton Utilities Guia do Utilizador descarregar pdf (Página 700)

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CHAPTER 19

Built-in Applications and System Data

19-26 To Do List

begin

theTask := todaysTasksArray[i];

theIndex := i;

end;

//and mark it as done

GetRoot().calendar:GetToDo():

SetDone(theIndex,theTask,true,nil,nil);

The third parameter to SetDone determines whether a task is checked off; passing

nil unchecks it.

Miscellaneous To Do List Methods 19

The To Do List also provides the following methods:

■ GetTaskShapes and GetToDoShapes return the shapes necessary to draw

tasks, which are used for printing.

■ LastVisibleTopic returns the index in the topics array of the last

task drawn.

■ SetPriority sets the priority of a task. (This method requires the To Do List

to be open.)

■ EnsureVisibleTopic scrolls the To Do List as necessary to ensure that a

task is visible. (This method requires the To Do List to be open.)

Using the To Do List Soup 19

The To Do List stores its data in the “To Do List” soup. Entries in this soup are

frames for either a particular day, or for all repeating to do items.

In this soup, each day has a single entry that includes a

topics slot, which is an

array of tasks for that day. All repeating tasks are saved in a single entry, with a

date slot of 0.

If one day is represented by an entry on each of several stores of the soup—for

example, if there was one entry in internal store and one on a storage card—the To

Do List merges the entries for display purposes. The entries are not actually moved

from one store to another in this process.

For information about the structure of entries in this soup, see “To Do List Soup

Format” (page 16-77) in Newton Programmer’s Reference. A list of these frames is

available in the Summary; see “To Do List Soup” (page 19-53).

To avoid future compatibility problems with soup format changes, you should use

the global functions

GetSysEntryData and SetSysEntryData to get or

change entries in any of the built-in soups. They allow you to get and set the values

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