Built-in Applications and System Data

Auxiliary Buttons

Prefs and Formulas Compatibility

19

The functions

RegPrefs

,

UnRegPrefs

,

RegFormulas

, and

UnRegFormulas

are new to the 2.0 system.

Using the Prefs and Formulas Interfaces

19

This section describes how to add panels to the Prefs and Formulas rolls.

Adding a Prefs Roll Item

19

The

RegPrefs

function adds a panel to the Prefs rolls. This roll is not intended for

application-specific preferences, but rather for system-wide preferences.
Application-specific preferences should be set through an information button (an
"i" button) in the application base view's status bar. For more on the information
button, see

newtInfoButton

or

protoInfoButton

, depending on whether

you are working in the NewtApp framework or not.

The item added to the Prefs roll should be based on

protoPrefsRollItem

. The

UnRegPrefs

function reverses the effects of the

RegPrefs

function.

Adding a Formulas Roll Item

19

The

RegFormulas

function adds a panel to the Formulas roll. There is no proto

tailored for use as a Formulas panel. Instead, you should attempt to make your
panel look and act like the system-supplied panels. For an example of a template
with the look of the built-in Formulas panels, see the DTS sample code related to
the Prefs and Formulas rolls.

The

UnRegFormulas

function reverses the effects of the

RegFormulas

function.

Auxiliary Buttons

19

This section describes the use of auxiliary buttons. Figure 19-9 shows the effect of
adding an auxiliary button to the Notes application.

About Auxiliary Buttons

19

A set of functions allow you to add buttons to the status bars of the Notes and
Names applications. Third-party applications can use this mechanism to allow
themselves to be extended.

Auxiliary Buttons Compatibility

19

The auxiliary buttons mechanism is new to the Newton 2.0 system.