Show error messages during start up as soon as the main window is shown

When the user has setup cloud storage as their default file but didn't
store the cloud storage password an error is created but not shown until
another error happens - that's very confusing for the user.

This patch fixes that.

Fixes #938

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

main.cpp

@@ -69,11 +69,13 @@ int main(int argc, char **argv)
 				files.push_back(cloudURL);
 		}
 	}
-
 	MainWindow *m = MainWindow::instance();
 	m->setLoadedWithFiles(!files.isEmpty() || !importedFiles.isEmpty());
 	m->loadFiles(files);
 	m->importFiles(importedFiles);
+	// in case something has gone wrong make sure we show the error message
+	m->showError();
+
 	if (verbose > 0)
 		print_files();
 	if (!quit)

qt-ui/mainwindow.cpp

@@ -1511,6 +1511,11 @@ NotificationWidget *MainWindow::getNotificationWidget()
 	return ui.mainErrorMessage;
 }
 
+void MainWindow::showError()
+{
+	getNotificationWidget()->showNotification(get_error_string(), KMessageWidget::Error);
+}
+
 QString MainWindow::displayedFilename(QString fullFilename)
 {
 	QFile f(fullFilename);

qt-ui/mainwindow.h

@@ -98,6 +98,7 @@ public:
 	QUndoStack *undoStack;
 	NotificationWidget *getNotificationWidget();
 	void enableDisableCloudActions();
+	void showError();
 private
 slots:
 	/* file menu action */