Index: kdevplatform/shell/openprojectdialog.cpp
===================================================================
--- kdevplatform/shell/openprojectdialog.cpp
+++ kdevplatform/shell/openprojectdialog.cpp
@@ -87,7 +87,13 @@
         delete helpButton;
     }
 
-    const bool useKdeFileDialog = qEnvironmentVariableIsSet("KDE_FULL_SESSION");
+#ifndef KDEV_USE_NATIVE_DIALOGS
+    // user selected KDE file dialogs via the CMake option
+    const bool useKdeFileDialog = true;
+#else
+    // user selected native file dialogs via the CMake option
+    const bool useKdeFileDialog = false;
+#endif
     QStringList filters, allEntry;
     QString filterFormat = useKdeFileDialog
                          ? QStringLiteral("%1|%2 (%1)")
@@ -304,7 +310,18 @@
 
 void OpenProjectDialog::validateProjectName( const QString& name )
 {
-    m_projectName = name;
+    if (name != m_projectName) {
+        m_projectName = name;
+        QUrl url(m_url.adjusted(QUrl::StripTrailingSlash | QUrl::RemoveFilename));
+        qWarning() << Q_FUNC_INFO << m_url << "->" << url;
+        // construct a version of the project name that's safe for use as a filename:
+        // TODO: do an additional replace of QDir::separator() with "@"?
+        QString safeName = m_projectName.replace(QRegExp("[\\\\/]"), QStringLiteral("@"));
+        url.setPath(url.path() + '/' + safeName + '.' + ShellExtension::getInstance()->projectFileExtension());
+        qWarning() << "\t" << url;
+//         m_urlIsDirectory = false;
+//         m_url.setPath(url.path());
+    }
     validateProjectInfo();
 }