Apple Newton Programmer’s Newton 2.0 (for Newton 2.0) - Manual (Page 584)

C H A P T E R 1 5
Filing
15-18 Using the Filing Service
// now redraw views affected by the change
// NOTE: You could keep track of the original
// labelsFilter and storesFilter to see
// whether you need to actually do work.
end
Using the Folder Change Notification Service 15
You can use the RegFolderChanged global function to register callback
functions that are executed when the user adds, removes, or edits folders. Most
applications register these functions only while the application is actually open, so
the application base view’s
ViewSetupFormScript is an ideal place from which
to call the RegFolderChanged function. For example,
myCallback1 := func( oldFolder , newFolder );
begin
// retag entries
end;
myAppBase.viewSetupFormScript := func ()begin
RegFolderChanged('|myFnId1:myApp:mySig|, myCallback1);
end;
The UnRegFolderChanged function removes a specified callback from use by
the folder change mechanism. Most applications unregister their folder change
callback functions when they close, making the application base view’s
ViewQuitScript method an appropriate place to unregister folder change
callback functions. For example,
myAppBase.viewQuitScript := func ()begin
UnRegFolderChanged('|myFnId1:myApp:mySig|);
end;
Creating the doCardRouting slot 15
If you want to move items between stores from within the Filing slip, you need to
create a
doCardRouting slot in your application’s base view. When an external
store is available and the value of this slot is non- nil , the Filing slip displays
buttons allowing the user to route the target to a specified destination store. If this
slot has a non-
nil value but no external store is available, these “card-routing”
buttons are not displayed.