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C H A P T E R 1 9
Built-in Applications and System Data
19-30
Notes
areaCode: "503",
region:"OR",
airport:"PDX"}
Using Longitude and Latitude Values
19
To calculate the latitude or longitude of a location, create and use the
following function:
CalcLngLat := func(dgrs, min, secs, westOrSouth) begin
local loc;
loc := dgrs / 180 + min / (180 * 60) + secs
/ (180 * 60 * 60);
loc := rinttol(loc * 0x10000000);
if westOrSouth then
loc := 0x20000000 - loc;
loc;
end;
The built-in utility functions
LatitudeToString
and
LongitudeToString
return a string representation of an encoded integer latitude or longitude value. For
information on these functions see Newton Programmer's Reference.
Setting the Home City
19
The
SetLocation
method sets the home city. It takes a single parameter
whichCity which is the same as the newCityFrame parameter of the
NewCity
method; see "Adding a City to a Newton Device" beginning on page 19-29. The
following code makes Los Angeles the home city:
GetRoot().worldClock:SetLocation( GetCityEntry
("Los Angeles") [0] );
Notes
19
This section describes the Notes API. The Notes application uses three types of
stationery: regular notes, checklists, and outlines. Figure 19-6 shows a note and a
checklist; an outline (not shown) is like the checklist without the checkboxes.
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