Rename QML singleton to Bobink and simplify singleton lifecycle

Replace QML_ELEMENT with QML_NAMED_ELEMENT(Bobink) so QML references
use `Bobink` instead of `BobinkClient`. Remove instance()/create()
factory in favor of inline s_instance set in the constructor. Import
BobinkPlugin statically in demo, link demo to BobinkQtOpcUaplugin,
and make library link dependencies PUBLIC. Add .qtcreator to gitignore.

1 files changed, 3 insertions, 25 deletions

diff --git a/src/BobinkClient.cpp b/src/BobinkClient.cpp
index f8303a3..01f9912 100644
--- a/src/BobinkClient.cpp
+++ b/src/BobinkClient.cpp
@@ -11,8 +11,6 @@
 
 using namespace Qt::Literals::StringLiterals;
 
-BobinkClient *BobinkClient::s_instance = nullptr;
-
 static QString
 defaultPkiDir ()
 {
@@ -36,35 +34,15 @@ BobinkClient::BobinkClient (QObject *parent)
     : QObject (parent), m_provider (new QOpcUaProvider (this)),
       m_pkiDir (defaultPkiDir ())
 {
+  // Singleton pattern: construct only once
+  Q_ASSERT(!s_instance);
   ensurePkiDirs (m_pkiDir);
   setupClient ();
   autoDetectPki ();
   applyPki ();
   connect (&m_discoveryTimer, &QTimer::timeout, this,
            &BobinkClient::doDiscovery);
-}
-
-BobinkClient::~BobinkClient ()
-{
-  if (s_instance == this)
-    s_instance = nullptr;
-}
-
-BobinkClient *
-BobinkClient::instance ()
-{
-  return s_instance;
-}
-
-BobinkClient *
-BobinkClient::create (QQmlEngine *, QJSEngine *)
-{
-  if (!s_instance)
-    {
-      s_instance = new BobinkClient;
-      QJSEngine::setObjectOwnership (s_instance, QJSEngine::CppOwnership);
-    }
-  return s_instance;
+  s_instance = this;
 }
 
 void