Apple Newton Programmer’s Newton 2.0 (for Newton 2.0) - Manual (Page 580)

C H A P T E R 1 5
Filing
15-14 Using the Filing Service
Creating the labelsFilter slot 15
Your application’s target view must supply a labelsFilter slot. This slot holds
a value indicating the current filing filter selected by the user in the picker displayed
by the folder tab view. This slot can store either a symbol indicating the currently
displayed filing category or the value
nil (which specifies that the Unfiled category
is currently displayed).
The system sets the value of the labelsFilter slot for you. Your
NewFilingFilter method must update the display of your application’s
data according to the value of this slot.
To display a predetermined filing category when your application opens, you can
set an initial value for the
labelsFilter slot from within the application base
view’s ViewSetupFormScript method.
Creating the storesFilter slot 15
Your application’s target view must supply a storesFilter slot. This slot stores
a value indicating the current store filter selected by the user from the picker
displayed by the folder tab view. This slot can store either a symbol or the value
nil .
The system sets the value of the storesFilter slot for you. Your
NewFilingFilter method must update the display of your application’s
data according to the value of this slot.
To display items on a particular store when your application opens, you can set an
initial value for the
storesFilter slot from within the application base view’s
ViewSetupFormScript method.
Adding the Filing Button 15
You need to take the following steps to add the protoFilingButton view to
your application:
■ In NTK, sketch the filing button using the protoFilingButton proto and
declare it to the application’s base view.
■ Set appropriate values for the button’s viewBounds slot.
Adding the Folder Tab View 15
Your application’s base view must provide a view that displays the currently
selected filing category and allows the user to select a new filing category. This
view is based on either the
protoNewFolderTab or protoClockFolderTab
system proto.
Adding the folder tab view to your application is easy. In NTK, sketch the folder
tab in your application’s base view using the
protoNewFolderTab proto and