PureLVSORT library : sorting ListIconGadgets (and more)

gnozal · Post by **gnozal** » Wed Oct 18, 2006 2:53 pm

Update

Changes :
- improved eGrid compatibility
- added unicode / unicode+threadsafe versions

srod · Post by **srod** » Wed Oct 18, 2006 3:17 pm

gnozal wrote:Update

Changes :
- improved eGrid compatibility
- added unicode / unicode+threadsafe versions

Works perfectly. egrid can now track the sort and can notify applications when the sort is complete, thus enabling them to reinstate the selection box etc.

Thanks Gnozal.

rw · Post by rw » Wed Oct 18, 2006 6:23 pm

Deleted

rw

gnozal · Post by **gnozal** » Thu Oct 19, 2006 7:38 am

rw wrote:Deleted

rw

http://people.freenet.de/gnozal/PureLVSORT_.zip

mskuma · Post by **mskuma** » Tue Oct 24, 2006 4:48 am

srod wrote:Works perfectly. egrid can now track the sort and can notify applications when the sort is complete, thus enabling them to reinstate the selection box etc.

Thanks Gnozal.

A question for either gnozal or srod about tracking the sort. For lengthy sorts, is it possible to show the user a progress bar indication of the sort progress?

srod · Post by **srod** » Tue Oct 24, 2006 9:20 am

Yes, but it would most likely have to come from the sort callback proc.

mskuma · Post by **mskuma** » Tue Oct 24, 2006 10:09 am

Yeah I could see that - ideally I was hoping to not have to wipe out what's already working well there. Thanks for the reply. Maybe I might just put something up there between the start & end sort message.

srod · Post by **srod** » Tue Oct 24, 2006 10:19 am

No I mean the sort callback proc within PureLVSort.

gnozal · Post by **gnozal** » Tue Oct 24, 2006 10:20 am

mskuma wrote:A question for either gnozal or srod about tracking the sort. For lengthy sorts, is it possible to show the user a progress bar indication of the sort progress?

AFAIK no.
I use the #LVM_SORTITEMS message, and in the sorting callback (pointed by pfnCompare) there is no way to know the progression.

srod · Post by **srod** » Tue Oct 24, 2006 10:27 am

I was thinking of some kind of estimate. You can obviously keep a track of how many comparisons are made - with the absolute max being n(n-1)/2 etc. Course, I do not know which sort algorithm Windows employs here.

gnozal · Post by **gnozal** » Tue Oct 24, 2006 10:34 am

srod wrote:I was thinking of some kind of estimate. You can obviously keep a track of how many comparisons are made - with the absolute max being n(n-1)/2 etc. Course, I do not know which sort algorithm Windows employs here.

It's probably some king of quicksort (?), but I don't know if there is a way to predict the number of comparisons needed : if the list is already sorted, i = few, if the list is in random order, i = max. And tracking the progression could slow it down.

srod · Post by **srod** » Tue Oct 24, 2006 10:40 am

Fair enough.

mskuma · Post by **mskuma** » Sat Oct 28, 2006 1:01 am

Regarding my earlier posting about giving the user some feedback (e.g. progress) during a long sort, I'm resorting to using a 'cheap way' i.e. changing a status bar icon. I thought maybe I could animate it with the aid of a timer (timeSetEvent) triggered to start and end with egrid messages, but it seems no window updates are available or done during the sort (which is understandable) because I can't see any animation (only the first frame is shown). I was wondering if you can suggest another way to achieve an animated effect during a long sort, otherwise I think perhaps an ok way to give feedback is to do a popup or maybe better still, change the statusbar icon using egrid messages. If any other suggestions, I'd be glad to hear. Thanks.

gnozal · Post by **gnozal** » Sat Oct 28, 2006 8:00 am

mskuma wrote:Regarding my earlier posting about giving the user some feedback (e.g. progress) during a long sort, I'm resorting to using a 'cheap way' i.e. changing a status bar icon. I thought maybe I could animate it with the aid of a timer (timeSetEvent) triggered to start and end with egrid messages, but it seems no window updates are available or done during the sort (which is understandable) because I can't see any animation (only the first frame is shown). I was wondering if you can suggest another way to achieve an animated effect during a long sort, otherwise I think perhaps an ok way to give feedback is to do a popup or maybe better still, change the statusbar icon using egrid messages. If any other suggestions, I'd be glad to hear. Thanks.

Maybe you could try to animate the icon in an thread ?

mskuma · Post by **mskuma** » Sat Oct 28, 2006 8:46 am

gnozal wrote:Maybe you could try to animate the icon in an thread ?

Hmm.. I thought using timeSetEvent runs in its own thread.. maybe that's just the timer and not the function it calls.. thanks.