Apple Newton Utilities Podręcznik Użytkownika Pobierz pdf (Strona 196)

5-14 Using Stationery

Using the MinimalBounds ViewDef Method 5

The MinimalBounds method must be used in a viewDef when the size of the

entry is dynamic, as it is in a paper-roll-style or page-style application. It’s not

necessary for a card-style application, which has a ﬁxed height; in that case you

should set a static height for your viewDef in the

viewDefHeight slot.

MinimalBounds method is used to compute the minimal size for the

enclosing bounding box for the viewDef at run time. The following is an

example of a

MinimalBounds implementation where the viewDef contains

newtEditView whose path slot is set to

[pathExpr:kDataSymbol,'notes]:

MinimalBounds: func(entry)

local result := {left: 0, top: 0, right: 0,

bottom: viewDefHeight};

// For an editView, make the bounds big enough to

// contain all the child views.

if entry.(kDataSymbol).notes then

foreach item in entry.(kDataSymbol).notes do

result := UnionRect( result, item.viewBounds );

Apple Newton Utilities Podręcznik Użytkownika Strona 196