how to use the cache-to-disk feature in Wallpaper

[Aaron J. Seigo]

On Friday 10 April 2009, Benoit Jacob wrote:
> I did setUsingDiskCache(true); in the constructor, and I emit

when you are ready to cache the image, you can now call:

insertIntoCache(const QString& key, const QImage &image);

and if you want to see if it exists and retrieve it call:

bool findInCache(const QString &key, QImage &image, unsigned int lastModified 
= 0)

with the same key. so in your case, you may want to include things like the 
the view point and zoom level in the key.

also, i'd suggest:

* deleting the old image so the user doesn't end up with a bajillion cached 
papers (maybe i should add that bookkeeping into Wallpaper itself? Hmmmm.. 
yes, probably... "let me get back to you on that one," he says, again.)

* putting a delay on the caching in case the user is moving around and zooming 
and what not.. you don't want to cause a bunch of disk caching to happen. 
maybe wait for non-action for 3-5 minutes or so?

-- 
Aaron J. Seigo
humru othro a kohnu se
GPG Fingerprint: 8B8B 2209 0C6F 7C47 B1EA  EE75 D6B7 2EB1 A7F1 DB43

KDE core developer sponsored by Qt Software

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