One of my views uses a table with text in the cells, for which I use a
custom drawing procedure. After filling in the table, I also call
"TblSelectItem" to highlight the current selection for the user. When run on
PalmOS 3.5 on the color POSE, the normal text is black on white, and when
highlighted it changes to white on dark blue (standard UI colors,
apparently).
Anyway, I decided to try using color to differentiate the table entries. It
is trivial in my custom draw procedure to use WinSetTextColor to save and
restore the text color when drawing the text. This works OK and I set some
of the table entries to show up as green on white. However, when I call
TblSelectItem on one of these entries, the highlighting apparently does not
recognize my green text pixels and I end up with green on dark blue which is
definitely ugly. To get around this, I am now doing my own highlighting by
drawing white characters on a green-filled rectangle.
I guess my point is that it is a bit more difficult than I expected to make
use of different colors even in a fairly simple app. There are some other
fields that I could use color in, but it's not clear exactly how the UI
colors can be manipulated at exactly the right time for the system to draw
them without having to add a lot of custom drawing code. Has anyone else had
good or bad luck in implementing color into their existing apps? Does the
color API in 3.5 seem adequate, or are there some essential features that
are "missing"?
Doug Gordon
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