Main: separate the QApplication and UI creation

When some arguments like --help and --version are passed to the
executable, we don't need to create the UI at all.

This patch separates the QApplication creation which is at first
only needed to parse the arguments and then if exit() is not
called from subsurfacestartup.c, we can call some of the
"init" methods such as setup_system_prefs(), fill_profile_color()
etc.

At this point init_ui() can be called which no longer needs
to accept the command line argument list.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

3 files changed, 17 insertions, 16 deletions

diff --git a/main.cpp b/main.cpp
index e5a53a3d8..2642ccc5c 100644
--- a/main.cpp
+++ b/main.cpp
@@ -19,13 +19,7 @@ int main(int argc, char **argv)
 	int i;
 	bool no_filenames = true;
 
-	setup_system_prefs();
-	prefs = default_prefs;
-	fill_profile_color();
-	init_ui(&argc, &argv);
-	parse_xml_init();
-	taglist_init_global();
-
+	init_qt(&argc, &argv);
 	QStringList files;
 	QStringList importedFiles;
 	QStringList arguments = QCoreApplication::arguments();
@@ -47,13 +41,20 @@ int main(int argc, char **argv)
 		if (!defaultFile.isEmpty())
 			files.push_back(QString(prefs.default_filename));
 	}
-	parse_xml_exit();
+	setup_system_prefs();
+	prefs = default_prefs;
+	fill_profile_color();
+	parse_xml_init();
+	taglist_init_global();
+	init_ui();
+
 	MainWindow *m = MainWindow::instance();
-	m->setLoadedWithFiles( !files.isEmpty() || !importedFiles.isEmpty());
+	m->setLoadedWithFiles(!files.isEmpty() || !importedFiles.isEmpty());
 	m->loadFiles(files);
 	m->importFiles(importedFiles);
 	if (!quit)
 		run_ui();
 	exit_ui();
+	parse_xml_exit();
 	return 0;
 }
diff --git a/qt-gui.cpp b/qt-gui.cpp
index 2b16c2d77..a3b8b44b6 100644
--- a/qt-gui.cpp
+++ b/qt-gui.cpp
@@ -78,12 +78,14 @@ static QString decodeUtf8(const QByteArray &fname)
 }
 #endif
 
-void init_ui(int *argcp, char ***argvp)
+void init_qt(int *argcp, char ***argvp)
 {
-	QVariant v;
-
 	application = new QApplication(*argcp, *argvp);
+}
 
+void init_ui(void)
+{
+	QVariant v;
 	// tell Qt to use system proxies
 	// note: on Linux, "system" == "environment variables"
 	QNetworkProxyFactory::setUseSystemConfiguration(true);
@@ -155,8 +157,6 @@ void init_ui(int *argcp, char ***argvp)
 		window->setTitle(MWTF_FILENAME);
 	else
 		window->setTitle(MWTF_DEFAULT);
-
-	return;
 }
 
 void run_ui(void)
diff --git a/qt-gui.h b/qt-gui.h
index 80a2daf6a..c3d48afad 100644
--- a/qt-gui.h
+++ b/qt-gui.h
@@ -1,8 +1,8 @@
 #ifndef QT_GUI_H
 #define QT_GUI_H
 
-void init_ui(int *argcp, char ***argvp);
-void init_qt_ui(int *argcp, char ***argvp, char *errormessage);
+void init_qt(int *argcp, char ***argvp);
+void init_ui(void);
 
 void run_ui(void);
 void exit_ui(void);