From 672e6937afd1ff429c1aea2028b369e11a4df01d Mon Sep 17 00:00:00 2001
From: Ivailo Monev <xakepa10@laimg.moc>
Date: Wed, 2 Aug 2017 13:41:24 +0000
Subject: [PATCH] kemu: disable some functionality of QEMU is not installed at
 all

Signed-off-by: Ivailo Monev <xakepa10@laimg.moc>
---
 kemu/kemumainwindow.cpp | 11 +++++++++--
 kemu/kemumainwindow.h   |  3 ++-
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/kemu/kemumainwindow.cpp b/kemu/kemumainwindow.cpp
index 549ee8cf..9312a6d9 100644
--- a/kemu/kemumainwindow.cpp
+++ b/kemu/kemumainwindow.cpp
@@ -33,7 +33,7 @@
 #include "ui_kemu.h"
 
 KEmuMainWindow::KEmuMainWindow(QWidget *parent, Qt::WindowFlags flags)
-    : KXmlGuiWindow(parent, flags), m_kemuui(new Ui_KEmuWindow)
+    : KXmlGuiWindow(parent, flags), m_loading(false), m_installed(false), m_kemuui(new Ui_KEmuWindow)
 {
     m_kemuui->setupUi(this);
 
@@ -94,6 +94,7 @@ KEmuMainWindow::KEmuMainWindow(QWidget *parent, Qt::WindowFlags flags)
         << "qemu-system-xtensaeb";
     foreach (const QString bin, qemuBins) {
         if(!KStandardDirs::findExe(bin).isEmpty()) {
+            m_installed = true;
             m_kemuui->systemComboBox->addItem(bin);
         }
     }
@@ -112,6 +113,12 @@ KEmuMainWindow::KEmuMainWindow(QWidget *parent, Qt::WindowFlags flags)
         m_kemuui->machinesList->listView()->keyboardSearch(lastSelected);
     }
 
+    if(!m_installed) {
+        m_kemuui->startStopButton->setEnabled(false);
+        QMessageBox::critical(this, i18n("QEMU not available"), i18n("QEMU not available"));
+        return;
+    }
+
     QFile kvmdev("/dev/kvm");
     if (!kvmdev.exists()) {
         const QString modprobeBin = KStandardDirs::findExe("modprobe");
@@ -273,7 +280,7 @@ void KEmuMainWindow::machineChanged(QItemSelection ignored, QItemSelection ignor
         QFile kvmdev("/dev/kvm");
         m_kemuui->KVMCheckBox->setEnabled(kvmdev.exists());
 
-        m_kemuui->startStopButton->setEnabled(true);
+        m_kemuui->startStopButton->setEnabled(m_installed);
         m_kemuui->groupBox->setEnabled(true);
         if (m_machines.contains(machine)) {
             kDebug() << "machine is running" << machine;
diff --git a/kemu/kemumainwindow.h b/kemu/kemumainwindow.h
index 6df46236..a0071da8 100644
--- a/kemu/kemumainwindow.h
+++ b/kemu/kemumainwindow.h
@@ -49,10 +49,11 @@ private slots:
 private:
     void updateStatus();
 
+    bool m_loading;
+    bool m_installed;
     Ui_KEmuWindow *m_kemuui;
     QSettings *m_settings;
     QHash<QString,QProcess*> m_machines;
-    bool m_loading;
 };
 
 #endif // KEMUMAINWINDOW_H
\ No newline at end of file