/*
This is supposed to cut the cache size down by about 25% in a
minute once the application becomes idle, to let any inserted pixmap
remain in the cache for some time before it becomes a candidate for
cleaning-up, and to not cut down the size of the cache while the
cache is in active use.
When the last pixmap has been deleted from the cache, kill the
timer so Qt won't keep the CPU from going into sleep mode.
*/
void QPMCache::timerEvent(QTimerEvent *)
{
int mc = maxCost();
bool nt = totalCost() == ps;
setMaxCost(nt ? totalCost() * 3 / 4 : totalCost() -1);
setMaxCost(mc);
ps = totalCost();
QHash<QString, QPixmapCache::Key>::iterator it = cacheKeys.begin();
while (it != cacheKeys.end()) {
if (!contains(it.value())) {
releaseKey(it.value());
it = cacheKeys.erase(it);
} else {
++it;
}
}
if (!size()) {
killTimer(theid);
theid = 0;
} else if (nt != t) {
killTimer(theid);
theid = startTimer(nt ? 10000 : 30000);
t = nt;
}
}
QT_BEGIN_INCLUDE_NAMESPACE
#include "qpixmapcache.moc"
QT_END_INCLUDE_NAMESPACE
/*
This is supposed to cut the cache size down by about 80-90% in a
minute once the application becomes idle, to let any inserted pixmap
remain in the cache for some time before it becomes a candidate for
cleaning-up, and to not cut down the size of the cache while the
cache is in active use.
When the last pixmap has been deleted from the cache, kill the
timer so Qt won't keep the CPU from going into sleep mode.
*/
void QPMCache::timerEvent(QTimerEvent *)
{
int mc = maxCost();
bool nt = totalCost() == ps;
setMaxCost(nt ? totalCost() * 3 / 4 : totalCost() -1);
setMaxCost(mc);
ps = totalCost();
QHash<QString, qint64>::iterator it = cacheKeys.begin();
while (it != cacheKeys.end()) {
if (!contains(it.value())) {
it = cacheKeys.erase(it);
} else {
++it;
}
}
if (!size()) {
killTimer(id);
id = 0;
} else if (nt != t) {
killTimer(id);
id = startTimer(nt ? 10000 : 30000);
t = nt;
}
}
/*
This is supposed to cut the cache size down by about 25% in a
minute once the application becomes idle, to let any inserted pixmap
remain in the cache for some time before it becomes a candidate for
cleaning-up, and to not cut down the size of the cache while the
cache is in active use.
When the last detached pixmap has been deleted from the cache, kill the
timer so Qt won't keep the CPU from going into sleep mode. Currently
the timer is not restarted when the pixmap becomes unused, but it does
restart once something else is added (i.e. the cache space is actually needed).
Returns \c true if any were removed.
*/
bool QPMCache::flushDetachedPixmaps(bool nt)
{
int mc = maxCost();
setMaxCost(nt ? totalCost() * 3 / 4 : totalCost() -1);
setMaxCost(mc);
ps = totalCost();
bool any = false;
QHash<QString, QPixmapCache::Key>::iterator it = cacheKeys.begin();
while (it != cacheKeys.end()) {
if (!contains(it.value())) {
releaseKey(it.value());
it = cacheKeys.erase(it);
any = true;
} else {
++it;
}
}
return any;
}
ImageCache() { setMaxCost(cacheMaxSize); }
