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refs #759 Allow cache value notification slot to be changed after construction.

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Also allow slot to be any type of callable, including member function or lambda.
This commit is contained in:
Mathew Sutcliffe
2016-09-09 00:49:08 +01:00
committed by Roland Winklmeier
parent d24c17eba2
commit e01ae2be11
6 changed files with 71 additions and 52 deletions
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20
src/blackmisc/datacache.h
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@@ -286,17 +286,11 @@ namespace BlackMisc
class CData : public BlackMisc::CCached<typename Trait::type>
{
public:
//! \copydoc BlackMisc::CCached::NotifySlot
template <typename T>
using NotifySlot = typename BlackMisc::CCached<typename Trait::type>::template NotifySlot<T>;
//! Constructor.
//! \param owner Will be the parent of the internal QObject used to access the value.
//! \param slot Slot to call when the value is modified by another object.
//! Must be a void, non-const member function of the owner.
template <typename T>
CData(T *owner, NotifySlot<T> slot = nullptr) :
CData::CCached(CDataCache::instance(), Trait::key(), Trait::humanReadable(), Trait::isValid, Trait::defaultValue(), owner, slot)
CData(T *owner) :
CData::CCached(CDataCache::instance(), Trait::key(), Trait::humanReadable(), Trait::isValid, Trait::defaultValue(), owner)
{
if (Trait::timeToLive() >= 0) { CDataCache::instance()->setTimeToLive(Trait::key(), Trait::timeToLive()); }
if (Trait::isPinned()) { CDataCache::instance()->pinValue(Trait::key()); }
@@ -304,6 +298,16 @@ namespace BlackMisc
static_assert(! (Trait::isPinned() && Trait::isDeferred()), "trait can not be both pinned and deferred");
}
//! Constructor.
//! \param owner Will be the parent of the internal QObject used to access the value.
//! \param slot Slot to call when the value is modified by another object.
//! Must be a void, non-const member function of the owner.
template <typename T, typename F>
CData(T *owner, F slot) : CData(owner)
{
this->setNotifySlot(slot);
}
//! \copydoc BlackMisc::CCached::set
CStatusMessage set(const typename Trait::type &value, qint64 timestamp = 0)
{