[Loadstone] A small suggestion
shawn at odyssey.cm.nu
Thu Sep 21 01:16:10 BST 2006
A lot of points wouldn't be unique with only 32 characters to work with.
This still wouldn't solve the scaling problem. To generate the list the
entire result set has to be stored in memory. On a large database this just
wouldn't fit. The speed problems aren't because of the calculations but the
read speed of the database engine, something that's internal to the phone.
On Wed, 20 Sep 2006, Ari Moisio wrote:
> Hi Shawn
> I checked with N6680 and phone book using Mobilespeak and it can handle
> at least 40 characters. If we reserver two characters for chek state, six
> chars for distance and rest of the line for point name i think most of
> those point names are unique.
> Creatin those lists will require more calculation but point distances
> should be calculated anyway to find nearest point.
> On Wed, 20 Sep 2006, Shawn Kirkpatrick wrote:
>> Interesting idea for the exploration mode but it just isn't going to happen
>> for a few reasons. List boxes seem to be limited in the number of characters
>> per item. The docs don't seem to say exactly what that limit is but it's
>> quite short, maybe 30 characters if we're lucky. A point name can be up to
>> 75 characters, then add in the distance and the checked status and you're
>> getting close to 100 characters per item. The other reason that the list and
>> the first letter search won't work is speed. On a very small database this
>> would probably work but it wouldn't scale at all. On a large database a
>> search may return a lot of results and take a very long time to do it. Maybe
>> on a newer phone the time might be workable but I doubt it. As it is now
>> text searches take a long time even on my n70. and that's one of the fastest
>> phones I know of.
>> There's probably going to be changes to the exploration mode but I haven't
>> figured out what they're going to be yet. I want to improve things but not
>> lose any existing functionallity.
>> On Wed, 20 Sep 2006, Ari Moisio wrote:
>>> About point searches:
>>> Sorry, but current exploration mode reminds about those 80's text
>>> adventure games.
>>> I'll suggest following user interface in exploration mode:
>>> - Joystick will open a list dialog about nearby points. Up points between
>>> northwest and northeast, rigth between northeast and southeast and so on.
>>> Pressing joystick will bring list of nearest point in any direction.
>>> In this list there are points names, distances and some indicator if
>>> point is checked sorted by distance.
>>> Pressing joystic will move to selected point.
>>> - When pressing number key application will list points with
>>> corresponding initial letters, for example: pressing '2' three times
>>> quicly will brin up all points whose name begins with 'c'.
>>> Loadstone mailing list
>>> Loadstone at loadstone-gps.com
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