From 71c3f58c9922e957768199fedf027651a032a575 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Mon, 27 Jul 2020 20:40:38 -0400
Subject: [PATCH] Provides user feedback upon improper command-line usage.

---
 OSBindings/Qt/mainwindow.cpp | 12 ++++++++++--
 OSBindings/Qt/mainwindow.h   |  2 +-
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/OSBindings/Qt/mainwindow.cpp b/OSBindings/Qt/mainwindow.cpp
index 8286fe45f..8a85b99dc 100644
--- a/OSBindings/Qt/mainwindow.cpp
+++ b/OSBindings/Qt/mainwindow.cpp
@@ -45,7 +45,9 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) {
 
 MainWindow::MainWindow(const QString &fileName) {
 	init();
-	launchFile(fileName);
+	if(!launchFile(fileName)) {
+		setUIPhase(UIPhase::SelectingMachine);
+	}
 }
 
 void MainWindow::deleteMachine() {
@@ -210,11 +212,17 @@ void MainWindow::insertFile(const QString &fileName) {
 	mediaTarget->insert_media(media);
 }
 
-void MainWindow::launchFile(const QString &fileName) {
+bool MainWindow::launchFile(const QString &fileName) {
 	targets = Analyser::Static::GetTargets(fileName.toStdString());
 	if(!targets.empty()) {
 		openFileName = QFileInfo(fileName).fileName();
 		launchMachine();
+		return true;
+	} else {
+		QMessageBox msgBox;
+		msgBox.setText("Unable to open file: " + fileName);
+		msgBox.exec();
+		return false;
 	}
 }
 
diff --git a/OSBindings/Qt/mainwindow.h b/OSBindings/Qt/mainwindow.h
index 91f3cab2d..22be7e739 100644
--- a/OSBindings/Qt/mainwindow.h
+++ b/OSBindings/Qt/mainwindow.h
@@ -102,7 +102,7 @@ class MainWindow : public QMainWindow, public Outputs::Speaker::Speaker::Delegat
 		QAction *insertAction = nullptr;
 		void insertFile(const QString &fileName);
 
-		void launchFile(const QString &fileName);
+		bool launchFile(const QString &fileName);
 		void launchTarget(std::unique_ptr<Analyser::Static::Target> &&);
 
 		void restoreSelections();