Pickers, Pop-up Views, and Overviews

About Pickers and Pop-up Views

More sophisticated picker protos allow multiple selections and use a close box to
dispatch the view.

With some picker protos, you must determine when and how the picker is displayed.
You open a picker view by sending the

Open

message to the view, or by calling the

PopupMenu

function.

Your picker views can display

simple text

bitmaps

icons with strings

separator lines

two-dimensional grids

The most sophisticated picker protos let you access built-in system soups as well as
your own soups. Much of the behavior of these protos is provided by data
definitions that iterate through soup entries, display a list, allow the user to see and
modify the data, and add new entries to the soup.

Pickers and Pop-up View Compatibility

6

The 2.0 release of Newton system software contains a number of new picker protos
and a replacement for the

DoPopup

global function.

New Pickers and Pop-up Views

6

Two new picker protos,

protoPopupButton

and

protoPopInPlace

, define

text buttons that display pickers.

A new set of map pickers allows you to display various maps from which a user
can select a location and receive information about it. The map pickers include
the following:

protoCountryPicker

protoProvincePicker

protoStatePicker

protoWorldPicker

A set of new text pickers lets you display pop-up views that show text that the
user can change by tapping the string and entering a new string. The

protoDateTextPicker

, for example, lets the user change a date. The text-

picker protos include the following:

protoTextPicker

protoDateTextPicker