[Qgis-developer] Aruns work: hierarchical SVG symbol display issue

[Bob and Deb]

It would be cool to have a folder called "Recently Used" with the same
hierarchy as the svg folder and have that folder opened by default. We have
something like this with the projection selector.

On Thu, Aug 23, 2012 at 5:06 AM, Andreas Neumann <a.neumann at carto.net>wrote:

> Hi,
>
> I noticed that the cache seems to better work if a symbol was already an
> SVG symbols (only 4-5 seconds) whereas, if a symbol was e.g. a simple
> marker before and I change it to an SVG symbol I have to wait 8-9 seconds
> for the list to load.
>
> Andreas
>
>
> On Thu, 23 Aug 2012 13:59:42 +0200, Andreas Neumann wrote:
>
>> Hi Arun,
>>
>> Thanks for your reply.
>>
>> On Thu, 23 Aug 2012 16:53:10 +0530, aruntheguy at gmail.com wrote:
>>
>>> Hello Neumann,
>>>
>>> On Thu, Aug 16, 2012 at 7:05 PM, Andreas Neumann  wrote:
>>>
>>>  The only issue I have with the current solution is that it takes a
>>>> long time (in my case about 10 seconds) to load all the symbols
>>>> (hundreds of them in my case). Wouldn't it be faster to only load
>>>> the first folder or even better no symbols at all until the user is
>>>> opening/clicking on one of the folders?
>>>>
>>>
>>> The default display of all symbols is to provide a way to see all the
>>> symbols when no folder is clicked. I guess that makes it a lengthy.
>>>
>>
>> ok - is there anything we can do here? Add an option not to load all
>> symbols by default?
>>
>> I expect the symbol list to grow larger and larger, and speed is an
>> issue here.
>>
>> With my setup I have to wait around 10 seconds when I load the SVG
>> symbols for the first time, when loading it subsequently in the same
>> session it is maybe 1 second faster (8-9 seconds). Certainly not a lot
>> of speed gain from the caching?
>>
>> As my list of symbol grows I expect the number of symbols to double
>> or triple, which would mean I would have to wait 20-30 seconds each
>> time I want to select an SVG symbol.
>>
>> Is there really no faster way to implement this? Only load the folder
>> with symbols I am interested in? When I work on a project around gaz
>> and water I am not interested in symbols for leisure activities at all
>> ...
>>
>>  The other question is: are those symbols cached, once they are
>>>> loaded? I don't see any speed increases the second time I load these
>>>> SVG symbols.
>>>>
>>>
>>> Yes, there is a SVG cache being created and reused. You should be
>>> definitely seeing reduced load times on second loads. I am a bit lost
>>> how that doesn't occur.
>>>
>>
>> really strange. I don't see a lot of speed gain from the cache. I
>> can't even see if there is an advantage of the cache at all.
>>
>>  But note that the cache is not persistent, so it cannot remember
>>> between the sessions.
>>>
>>
>> thats ok.
>>
>> Thanks for any additional information / ideas around this problem.
>>
>> Andreas
>>
>
> --
> --
> Andreas Neumann
> Böschacherstrasse 10A
> 8624 Grüt (Gossau ZH)
> Switzerland
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