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Cleanup: unify idiosyncratic singletons

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The way we handle singletons in QML, QML insists on allocating the
objects. This leads to a very idiosyncratic way of handling
singletons: The global instance pointer is set in the constructor.

Unify all these by implementing a "SillySingleton" template. All
of the weird singleton-classes can derive from this template and
don't have to bother with reimplementing the instance() function
with all the safety-checks, etc.

This serves firstly as documentation but also improves debugging
as we will now see wanted and unwanted creation and destruction
of these weird singletons.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2019-09-22 14:33:33 +02:00 • committed by Dirk Hohndel
parent f20d6187f0
commit 05200f9266
13 changed files with 86 additions and 89 deletions
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9
qt-models/gpslistmodel.cpp
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@ -3,11 +3,8 @@
#include "core/qthelper.h"
#include <QVector>
GpsListModel *GpsListModel::m_instance = NULL;
GpsListModel::GpsListModel(QObject *parent) : QAbstractListModel(parent)
{
m_instance = this;
}
void GpsListModel::update()
@ -62,9 +59,3 @@ QHash<int, QByteArray> GpsListModel::roleNames() const
roles[GpsLongitudeRole] = "longitude";
return roles;
}
GpsListModel *GpsListModel::instance()
{
return m_instance;
}