Apple Newton Utilities Guide de l'utilisateur télécharger pdf (Page 233)

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CHAPTER 6

Pickers, Pop-up Views, and Overviews

Overview Protos 6-33

Changing the Font of protoListPicker 6

The mechanism described here will probably change in the future. Eventually you

may be able to set a

viewFont slot in the list picker itself, just as you can set

viewLineSpacing now. In the meantime, you need a piece of workaround code.

You must set the

viewFont of the list picker and also include this workaround

code.

Give the list picker the following

viewSetupDoneScript:

func()

begin

if listBase then

SetValue(listBase, 'viewFont, viewFont) ;

inherited:?viewSetupDoneScript();

end;

This sets the viewFont of the listbase view to the view font of the list picker.

You cannot rely on the

listbase view always being there (hence the test).

Using protoSoupOverview 6

For the most part, you use this proto like protoOverview, except that it is set up

to use a soup cursor, and, so, is easier to use. See “Using protoOverview” (page 6-24)

for information.

Determining Which protoSoupOverview Item Is Hit 6

There is a method of protoSoupOverview called HitItem that is called

whenever an item is tapped. The method is deﬁned by the overview and you should

call the inherited method. Also note that

HitItem gets called regardless of where

in the line a tap occurs. If the tap occurs in the checkbox (that is, if

x is less than

selectIndent), you should do nothing other than calling the inherited functions,

because the inherited function will handle the tap, otherwise you should do

something appropriate.

The method is passed the index of the item that is hit. The index is relative to the

item displayed at the top of the displayed list. This item is always the current entry

of the cursor used by

protoSoupOverview, so you can ﬁnd the actual soup entry

by cloning the cursor and moving it.

func(itemIndex, x, y)

begin

// MUST call the inherited method for bookkeeping

inherited:HitItem(itemIndex, x, y);

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Apple Newton Utilities Guide de l'utilisateur Page 233

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