Apple Newton Utilities Uživatelská příručka stáhnout pdf (Strana 611)

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101

CHAPTER 16

Find

Using the Find Service 16-23

In the body of this method, you need to do whatever is necessary to display the

soup entry

myEntry. Typically, you ﬁrst send a Close message to the Overview

and then open the view that displays the entry. The following code fragment shows

the implementation of a typical

ShowFoundItem method.

// For use with ROM_SoupFinder proto

myApplication.ShowFoundItem:=

func(entry, myFinder)

begin // close my overview if it’s open

if currentView = myOverview then begin

myOverView:Close();

myDisplayView:Open();

// open view that displays the entry

end;

// scroll, highlight, etc. as necessary

// to display the entry

myDisplayView:DisplayEntry(entry, cursor);

end

Your application is always open when the ShowFoundItem message is sent to it.

For example, this message is sent when the user scrolls between found items from

within the Find slip. The system also invokes this method when the user taps an

item in the Find overview. In this case, the system opens your application, if

necessary, before sending the

ShowFoundItem message to it.

Note that if no items are found this message is never sent.

Using ShowFoundItem with ROM_CompatibleFinder 16

If you are using a ﬁnder based on ROM_CompatibleFinder, you still need to

implement a

ShowFoundItem in your application’s base view. Your ﬁnder also

needs to override the

ShowFakeEntry method. Your ShowFakeEntry method

needs to call your

ShowFoundItem method, making sure that your application is

open ﬁrst. Your

ShowFoundItem method should accept an element of the ﬁnder’s

items array as its first parameter, instead of a soup entry. It should perform the

same actions as a

ShowFoundItem method that expects a soup entry, as described

in “The ShowFoundItem Method” (page 16-22).

The following example demonstrates a typical

ShowFakeEntry method:

myFinder :=

{

_proto : ROM_CompatibleFinder,

ShowFakeEntry : func (index)

begin

local myApp;

if myApp := GetRoot.(kAppSymbol) then

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