Add KCoreConfigSkeleton::read() which doesn't call reparseConfiguration.

Call it from generated singletons, since the constructor creates
a KConfig from a filename, which already loads from disk.
This removes the need for using DelayedParsing.

REVIEW: 116845

autotests/kconfig_compiler/test10.cpp.ref

@@ -18,7 +18,7 @@ Test10 *Test10::self()
 {
   if (!s_globalTest10()->q) {
     new Test10;
-    s_globalTest10()->q->readConfig();
+    s_globalTest10()->q->read();
   }
 
   return s_globalTest10()->q;

autotests/kconfig_compiler/test1main.cpp

@@ -20,12 +20,23 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 #include "test1.h"
 #include <QGuiApplication>
+#include <KConfig>
+#include <KConfigGroup>
 
 int main(int argc, char **argv)
 {
     QGuiApplication app(argc, argv);
     Q_UNUSED(app);
+
+    {
+        KConfig initialConfig(QLatin1String("examplerc"));
+        KConfigGroup group = initialConfig.group(QLatin1String("MyOptions"));
+        group.writeEntry(QLatin1String("MyString"), QStringLiteral("The String"));
+    }
     Test1 *t = new Test1(QString(), QString());
+
+    bool ok = t->myString() == QLatin1String("The String");
+
     delete t;
-    return 0;
+    return ok ? 0 : 1;
 }

autotests/kconfig_compiler/test4.cpp.ref

@@ -18,7 +18,7 @@ Test4 *Test4::self()
 {
   if (!s_globalTest4()->q) {
     new Test4;
-    s_globalTest4()->q->readConfig();
+    s_globalTest4()->q->read();
   }
 
   return s_globalTest4()->q;

autotests/kconfig_compiler/test4main.cpp

@@ -21,12 +21,26 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include "test4.h"
 #include <QGuiApplication>
+#include <QStandardPaths>
+#include <QFile>
 
 int main(int argc, char **argv)
 {
     QGuiApplication app(argc, argv);
     Q_UNUSED(app);
+    {
+        KConfig initialConfig(QLatin1String("test4rc"));
+        KConfigGroup group = initialConfig.group(QLatin1String("Foo"));
+        group.writeEntry(QLatin1String("foo bar"), QStringLiteral("Value"));
+    }
     Test4 *t = Test4::self();
+    bool ok = QFile::exists(QStandardPaths::writableLocation(QStandardPaths::ConfigLocation) + "/test4rc");
+    if (!ok) {
+        qWarning() << "config file was not created!";
+    }
+    if (t->fooBar() != QStringLiteral("Value")) {
+        qWarning() << "wrong value for foo bar:" << t->fooBar();
+    }
     delete t;
-    return 0;
+    return ok ? 0 : 1;
 }

autotests/kconfig_compiler/test5.cpp.ref

@@ -18,7 +18,7 @@ Test5 *Test5::self()
 {
   if (!s_globalTest5()->q) {
     new Test5;
-    s_globalTest5()->q->readConfig();
+    s_globalTest5()->q->read();
   }
 
   return s_globalTest5()->q;

autotests/kconfig_compiler/test8b.cpp.ref

@@ -18,7 +18,7 @@ Test8b *Test8b::self()
 {
   if (!s_globalTest8b()->q) {
     new Test8b;
-    s_globalTest8b()->q->readConfig();
+    s_globalTest8b()->q->read();
   }
 
   return s_globalTest8b()->q;

autotests/kconfig_compiler/test_dpointer.cpp.ref

@@ -57,7 +57,7 @@ TestDPointer *TestDPointer::self()
 {
   if (!s_globalTestDPointer()->q) {
     new TestDPointer;
-    s_globalTestDPointer()->q->readConfig();
+    s_globalTestDPointer()->q->read();
   }
 
   return s_globalTestDPointer()->q;

autotests/kconfig_compiler/test_signal.cpp.ref

@@ -18,7 +18,7 @@ TestSignal *TestSignal::self()
 {
   if (!s_globalTestSignal()->q) {
     new TestSignal;
-    s_globalTestSignal()->q->readConfig();
+    s_globalTestSignal()->q->read();
   }
 
   return s_globalTestSignal()->q;

autotests/kconfigskeletontest.cpp

@@ -65,13 +65,12 @@ void KConfigSkeletonTest::testSimple()
     mMyString.clear();
     mMyFont = QFont();
 
-    readConfig();
+    read();
 
     QCOMPARE(mMyBool, WRITE_SETTING1);
     QCOMPARE(mMyColor, WRITE_SETTING2);
     QCOMPARE(mMyFont, WRITE_SETTING3);
     QCOMPARE(mMyString, WRITE_SETTING4);
-
 }
 
 void KConfigSkeletonTest::testRemoveItem()

src/core/kcoreconfigskeleton.cpp

@@ -986,7 +986,7 @@ KCoreConfigSkeleton::KCoreConfigSkeleton(const QString &configname, QObject *par
 {
     //qDebug() << "Creating KCoreConfigSkeleton (" << (void *)this << ")";
 
-    d->mConfig = KSharedConfig::openConfig(configname, KConfig::FullConfig | KConfig::DelayedParsing);
+    d->mConfig = KSharedConfig::openConfig(configname, KConfig::FullConfig);
 }
 
 KCoreConfigSkeleton::KCoreConfigSkeleton(KSharedConfig::Ptr pConfig, QObject *parent)
@@ -1065,6 +1065,11 @@ void KCoreConfigSkeleton::readConfig()
 {
     // qDebug();
     d->mConfig->reparseConfiguration();
+    read();
+}
+
+void KCoreConfigSkeleton::read()
+{
     KConfigSkeletonItem::List::ConstIterator it;
     for (it = d->mItems.constBegin(); it != d->mItems.constEnd(); ++it) {
         (*it)->readConfig(d->mConfig.data());

src/core/kcoreconfigskeleton.h

@@ -1040,6 +1040,18 @@ public:
      */
     virtual void readConfig();
 
+    /**
+     * Read preferences from the KConfig object.
+     * This method assumes that the KConfig object was previously loaded,
+     * i.e. it uses the in-memory values from KConfig without reloading from disk.
+     *
+     * This method calls usrReadConfig() after reading the settings of the
+     * registered items from the KConfig. You can overridde usrReadConfig()
+     * in derived classes if you have special requirements.
+     * @since 5.0
+     */
+    void read();
+
     /**
      * Set the config file group for subsequent addItem() calls. It is valid
      * until setCurrentGroup() is called with a new argument. Call this before

src/kconfig_compiler/kconfig_compiler.cpp

@@ -2249,7 +2249,7 @@ int main(int argc, char **argv)
         } else {
             cpp << "  if (!s_global" << cfg.className << "()->q) {" << endl;
             cpp << "    new " << cfg.className << ';' << endl;
-            cpp << "    s_global" << cfg.className << "()->q->readConfig();" << endl;
+            cpp << "    s_global" << cfg.className << "()->q->read();" << endl;
             cpp << "  }" << endl << endl;
         }
         cpp << "  return s_global" << cfg.className << "()->q;" << endl;
@@ -2263,7 +2263,7 @@ int main(int argc, char **argv)
             cpp << "     return;" << endl;
             cpp << "  }" << endl;
             cpp << "  new " << cfg.className << "(cfgfilename);" << endl;
-            cpp << "  s_global" << cfg.className << "()->q->readConfig();" << endl;
+            cpp << "  s_global" << cfg.className << "()->q->read();" << endl;
             cpp << "}" << endl << endl;
         }
     }