From f0cf9e5147c8db70fd94b2fa530d30fb07a0b20f Mon Sep 17 00:00:00 2001
From: Martin Piatka <445597@mail.muni.cz>
Date: Mon, 16 Sep 2019 11:26:34 +0200
Subject: [PATCH] GUI: Show error message when UltraGrid exits with non-zero
 exit code

---
 gui/QT/window/ultragrid_window.cpp | 18 ++++++++++++++++++
 gui/QT/window/ultragrid_window.hpp |  1 +
 2 files changed, 19 insertions(+)

diff --git a/gui/QT/window/ultragrid_window.cpp b/gui/QT/window/ultragrid_window.cpp
index 234010f9d..7c32422e4 100644
--- a/gui/QT/window/ultragrid_window.cpp
+++ b/gui/QT/window/ultragrid_window.cpp
@@ -248,6 +248,7 @@ void UltragridWindow::connectSignals(){
 	connect(&process, SIGNAL(readyReadStandardOutput()), this, SLOT(outputAvailable()));
 	connect(&process, SIGNAL(readyReadStandardError()), this, SLOT(outputAvailable()));
 	connect(&process, SIGNAL(stateChanged(QProcess::ProcessState)), this, SLOT(processStateChanged(QProcess::ProcessState)));
+	connect(&process, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(processFinished(int, QProcess::ExitStatus)));
 
 	connect(ui.arguments, SIGNAL(textChanged(const QString &)), this, SLOT(editArgs(const QString &)));
 	connect(ui.editCheckBox, SIGNAL(toggled(bool)), this, SLOT(setArgs()));
@@ -370,6 +371,23 @@ void UltragridWindow::processStateChanged(QProcess::ProcessState s){
 	}
 }
 
+void UltragridWindow::processFinished(int code, QProcess::ExitStatus status){
+	if(status == QProcess::CrashExit || code != 0){
+		QMessageBox msgBox(this);
+		msgBox.setIcon(QMessageBox::Critical);
+		msgBox.setWindowTitle("UltraGrid error!");
+		msgBox.setText("Ultragrid has exited with an error! If you need help, please send an email "
+				"to ultragrid-dev@cesnet.cz with log attached.");
+		QPushButton *showLogBtn = msgBox.addButton(tr("Show log"), QMessageBox::ActionRole);
+		QPushButton *dissmissBtn = msgBox.addButton(tr("Dismiss"), QMessageBox::RejectRole);
+		msgBox.exec();
+
+		if(msgBox.clickedButton() == showLogBtn){
+			showLog();
+		}
+	}
+}
+
 QString UltragridWindow::findUltragridExecutable() {
 	QStringList args = QCoreApplication::arguments();
 	int index = args.indexOf("--with-uv");
diff --git a/gui/QT/window/ultragrid_window.hpp b/gui/QT/window/ultragrid_window.hpp
index 7172c85aa..531d19370 100644
--- a/gui/QT/window/ultragrid_window.hpp
+++ b/gui/QT/window/ultragrid_window.hpp
@@ -68,6 +68,7 @@ public slots:
 private slots:
 	void setStartBtnText(QProcess::ProcessState);
 	void processStateChanged(QProcess::ProcessState);
+	void processFinished(int, QProcess::ExitStatus);
 	void enablePreview(bool);
 
 	void schedulePreview();