Cleanup code style (C++11, casts, etc)

16 files changed, 83 insertions, 84 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 885ca52..c58fa4b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,13 +3,15 @@ cmake_minimum_required(VERSION 2.8.12 FATAL_ERROR)
 # project name
 project(vmchooser)
 
+SET(EXTRA_CXX_FLAGS "" CACHE STRING "Additional options to pass to C++ compiler")
+
 set(CMAKE_BUILD_TYPE Debug)
-set(CMAKE_CXX_FLAGS_DEBUG "-O0 -g -Wall -Wextra -pedantic -Werror -Wno-multichar")
+SET(CMAKE_CXX_FLAGS_DEBUG "-O0 -g -Wall -Wextra -Wpedantic -Wcast-align -Wcast-qual -Wchar-subscripts -Wcomment -Wconversion -Wdisabled-optimization -Wfloat-equal -Wformat -Wformat=2 -Wformat-nonliteral -Wformat-security -Wformat-y2k -Wimport -Winit-self -Winline -Winvalid-pch -Wlong-long -Wmissing-braces -Wmissing-field-initializers -Wmissing-format-attribute -Wmissing-include-dirs -Wmissing-noreturn -Wpacked -Wparentheses -Wpointer-arith -Wredundant-decls -Wreturn-type -Wsequence-point -Wsign-compare -Wstack-protector -Wstrict-aliasing -Wstrict-aliasing=2 -Wswitch -Wswitch-default -Wswitch-enum -Wtrigraphs -Wuninitialized -Wunknown-pragmas -Wunreachable-code -Wunused -Wunused-function -Wunused-label -Wunused-parameter -Wunused-value -Wunused-variable -Wvariadic-macros -Wvolatile-register-var -Wwrite-strings -Wno-multichar")
 set(CMAKE_CXX_FLAGS_RELEASE "-O2 -Wno-multichar")
 
 set(CMAKE_CXX_STANDARD 11)
 # Some cmake versions can't understand the CMAKE_CXX_STANDARD option above?
-SET( CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -std=c++11" )
+SET( CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -std=c++11 ${EXTRA_CXX_FLAGS}" )
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 set(CMAKE_AUTOMOC ON)
diff --git a/src/choosersettings.cpp b/src/choosersettings.cpp
index 28cbdb1..439c9ea 100644
--- a/src/choosersettings.cpp
+++ b/src/choosersettings.cpp
@@ -9,7 +9,7 @@
 #include "globals.h"
 
 bool ChooserSettings::settingsLoaded = false;
-ChooserSettings* ChooserSettings::chooserSettings = NULL;
+ChooserSettings* ChooserSettings::chooserSettings = nullptr;
 
 ChooserSettings::ChooserSettings() {
     // test (and make) directory
diff --git a/src/command_line_options.cpp b/src/command_line_options.cpp
index 2018760..0f26edf 100644
--- a/src/command_line_options.cpp
+++ b/src/command_line_options.cpp
@@ -6,39 +6,39 @@
 CommandLineOptions::CommandLineOptions(int argc, char * const argv[]) {
     // parse command line arguments (please sort by short option for easier handling)
     static const struct option longOptions[] = {
-        {"allow-vm-edit", no_argument, NULL, 'vmed'},
-        {"autoquit", required_argument, NULL, 'aqit'},
-        {"base", required_argument, NULL, 'b'},
-        {"path", required_argument, NULL, 'b'}, // Compatibility to v1.0
-        {"config", required_argument, NULL, 'c'},
-        {"debug", no_argument, NULL, 'D'},
-        {"default", required_argument, NULL, 'd'},
-        {"exam-mode", no_argument, NULL, 'exms'},
-        {"fullscreen", no_argument, NULL, 'F'},
-        {"file", required_argument, NULL, 'f'},
-        {"help", no_argument, NULL, 'h'},
-        {"locations", required_argument, NULL, 'l'},
-        {"pool", required_argument, NULL, 'P'},
-        {"pvs", no_argument, NULL, 'p'},
-        {"pvs-checked", no_argument, NULL, 'pvck'},
-        {"runscript", no_argument, NULL, 'S'},
-        {"size", required_argument, NULL, 's'},
-        {"tab", required_argument, NULL, 'T'},
-        {"theme", required_argument, NULL, 't'},
-        {"url", required_argument, NULL, 'u'},
-        {"version", no_argument, NULL, 'v'},
-        {"xpath", required_argument, NULL, 'x'},
-        {"location-mode", required_argument, NULL, 'locm'},
-        {"template-mode", required_argument, NULL, 'tmpm'},
-        {"start-uuid", required_argument, NULL, 'uuid'},
-        {"no-vtx", no_argument, NULL, 'nvtx'},
-        {0, 0, 0, 0}
+        {"allow-vm-edit", no_argument, nullptr, 'vmed'},
+        {"autoquit", required_argument, nullptr, 'aqit'},
+        {"base", required_argument, nullptr, 'b'},
+        {"path", required_argument, nullptr, 'b'}, // Compatibility to v1.0
+        {"config", required_argument, nullptr, 'c'},
+        {"debug", no_argument, nullptr, 'D'},
+        {"default", required_argument, nullptr, 'd'},
+        {"exam-mode", no_argument, nullptr, 'exms'},
+        {"fullscreen", no_argument, nullptr, 'F'},
+        {"file", required_argument, nullptr, 'f'},
+        {"help", no_argument, nullptr, 'h'},
+        {"locations", required_argument, nullptr, 'l'},
+        {"pool", required_argument, nullptr, 'P'},
+        {"pvs", no_argument, nullptr, 'p'},
+        {"pvs-checked", no_argument, nullptr, 'pvck'},
+        {"runscript", no_argument, nullptr, 'S'},
+        {"size", required_argument, nullptr, 's'},
+        {"tab", required_argument, nullptr, 'T'},
+        {"theme", required_argument, nullptr, 't'},
+        {"url", required_argument, nullptr, 'u'},
+        {"version", no_argument, nullptr, 'v'},
+        {"xpath", required_argument, nullptr, 'x'},
+        {"location-mode", required_argument, nullptr, 'locm'},
+        {"template-mode", required_argument, nullptr, 'tmpm'},
+        {"start-uuid", required_argument, nullptr, 'uuid'},
+        {"no-vtx", no_argument, nullptr, 'nvtx'},
+        {nullptr, 0, nullptr, 0}
     };
 
     int c;
 
     // Again, please sort alphabetically in getopt_long call and switch statement
-    while ((c = getopt_long(argc, argv, "b:c:Dd:Ff:hl:P:pSs:t:T:u:vx:?", longOptions, NULL)) != -1) {
+    while ((c = getopt_long(argc, argv, "b:c:Dd:Ff:hl:P:pSs:t:T:u:vx:?", longOptions, nullptr)) != -1) {
         switch (c) {
         case 'aqit':
             options.insert("autoquit", optarg);
diff --git a/src/dialog.cpp b/src/dialog.cpp
index 6250114..8399e62 100644
--- a/src/dialog.cpp
+++ b/src/dialog.cpp
@@ -100,12 +100,8 @@ Dialog::~Dialog() {
 
 void Dialog::changeEvent(QEvent *e) {
     QDialog::changeEvent(e);
-    switch (e->type()) {
-    case QEvent::LanguageChange:
+    if (e->type() == QEvent::LanguageChange) {
         ui->retranslateUi(this);
-        break;
-    default:
-        break;
     }
 }
 
@@ -117,11 +113,11 @@ void Dialog::on_treeView_doubleClicked(const QModelIndex& index)
     SessionTreeItem* item =
                     static_cast<SessionTreeItem*>(index.internalPointer());
 
-    if (item == NULL)
+    if (item == nullptr)
             return; // do nothing if cast failed
 
     const Session* s(item->session());
-    if (s == NULL) // no valid session has been selected, do nothing
+    if (s == nullptr) // no valid session has been selected, do nothing
             return;
 
     // These two are up here in case run-virt cares...
@@ -173,13 +169,13 @@ void Dialog::on_treeView_doubleClicked(const QModelIndex& index)
                 if (pid == 0) {
                     // At this point we are executing as the 2nd child process
                     // Replace this clone with the process we'd like to start
-                    char const * const args[] = {VMCHOOSER_SESSION_START_SCRIPT, NULL};
-                    execv(VMCHOOSER_SESSION_START_SCRIPT, (char**)args);
+                    char * const args[] = { strdup(VMCHOOSER_SESSION_START_SCRIPT), nullptr };
+                    execv(VMCHOOSER_SESSION_START_SCRIPT, args);
                 }
                 _exit(0); // Dont use exit hooks
             }
             // Wait and cleanup the intermediate process
-            waitpid(pid, NULL, 0);
+            waitpid(pid, nullptr, 0);
         }
         ChooserSettings::setSetting("last-session", (s->shortDescription()));
         ChooserSettings::setSetting("last-tab", QString::number(activeTab_));
@@ -195,7 +191,7 @@ void Dialog::on_treeView_doubleClicked(const QModelIndex& index)
 void Dialog::on_treeView_expanded(const QModelIndex& index) {
     SessionTreeItem* item =
                     static_cast<SessionTreeItem*>(index.internalPointer());
-    if (item->session() == NULL && item->sectionType() != SECTION_FOR_LOCATION) {
+    if (item->session() == nullptr && item->sectionType() != SECTION_FOR_LOCATION) {
         genericExpandedOnce_ = true;
     }
 }
@@ -262,7 +258,7 @@ bool Dialog::selectSession(const QString& name) {
                     continue;
                 SessionTreeItem* item = static_cast<SessionTreeItem*>(index.internalPointer());
                 const Session* s = item->session();
-                if (s == NULL) {
+                if (s == nullptr) {
                     continue;
                 }
                 if (s->shortDescription() == name) {
@@ -296,7 +292,7 @@ bool Dialog::selectSessionByUuid(const QString& name) {
                 QModelIndex index(model_[tab]->index(j, 0, section));
                 SessionTreeItem* item = static_cast<SessionTreeItem*>(index.internalPointer());
                 const Session* s(item->session());
-                if (s == NULL) {
+                if (s == nullptr) {
                     continue;
                 }
                 /* TODO: implement this here */
@@ -457,7 +453,7 @@ void Dialog::addSessionsAfterDownload(QNetworkReply* reply) {
         // TODO: Filter user's classes and add to tab[TAB_MY_COURSES]
         bool showEdit = false;
         for (QList<Session*>::const_iterator it = sessions.begin(); it != sessions.end(); ++it) {
-            if (((VSession*)(*it))->canEdit()) {
+            if (reinterpret_cast<VSession*>(*it)->canEdit()) {
                 showEdit = true;
                 break;
             }
@@ -485,7 +481,7 @@ void Dialog::mousePressEvent(QMouseEvent * event) {
 void Dialog::treeView_selectionChanged(const QModelIndex& current, const QModelIndex&) {
     SessionTreeItem* item =
             static_cast<SessionTreeItem*>(current.internalPointer());
-    if (item == NULL) {
+    if (item == nullptr) {
         ui->chkAdminMode->setEnabled(false);
         return;
     }
@@ -500,7 +496,7 @@ void Dialog::treeView_selectionChanged(const QModelIndex& current, const QModelI
 
     QString description;
     if (s->type() == Session::VSESSION) {
-        const VSession* vs = (VSession*) s;
+        const VSession* vs = reinterpret_cast<const VSession*>(s);
 
         ui->label_creator->setText(vs->getAttribute("creator", "param"));
         ui->label_creator->setToolTip(vs->getAttribute("creator", "param"));
@@ -582,25 +578,25 @@ void Dialog::on_filterEdit_textEdited() {
 
 void Dialog::on_filterEdit_textChanged() {
     if (activeTab_ < 0 || activeTab_ >= TAB_COUNT) return;
-    SessionTreeModel *newModel = NULL;
+    SessionTreeModel *newModel = nullptr;
 
     // filter the current model
     if (!ui->filterEdit->text().isEmpty() && ui->filterEdit->text().replace(" ", "").length() > 2) {
-        if (model_[activeTab_] != NULL) {
+        if (model_[activeTab_] != nullptr) {
             newModel = new SessionTreeModel(this);
             newModel->addItems(this->model_[activeTab_]->lookForItem(ui->filterEdit->text()));
         }
     }
-    if (newModel == NULL) {
+    if (newModel == nullptr) {
         newModel = model_[activeTab_];
     }
-    if (newModel != NULL) {
+    if (newModel != nullptr) {
         setListModel(newModel);
     }
 }
 
 void Dialog::setListModel(SessionTreeModel *model) {
-    QAbstractItemModel *old = NULL;
+    QAbstractItemModel *old = nullptr;
     if (ui->treeView->model() == model_[0] || ui->treeView->model() == model_[1] || ui->treeView->model() == model_[2]) {
     } else {
         old = ui->treeView->model();
@@ -617,7 +613,7 @@ void Dialog::setListModel(SessionTreeModel *model) {
             ui->treeView->collapse(index);
         }
     }
-    if (old != NULL) {
+    if (old != nullptr) {
         old->deleteLater();
     }
 
@@ -674,7 +670,7 @@ void Dialog::addNewsAfterDownload(QNetworkReply* reply) {
     QDomElement timeNode = newsNode.firstChildElement("date");
     QDomElement infoNode = newsNode.firstChildElement("info");
     QDateTime timestamp;
-    timestamp.setTime_t(timeNode.text().toInt());
+    timestamp.setTime_t(timeNode.text().toUInt());
 
     if (timeNode.isNull() || infoNode.isNull()) {
         ui->newsTextBrowser->setText(QCoreApplication::instance()->translate("Dialog", "Could not get news. (//news/date or //news/info missing)"));
@@ -778,6 +774,7 @@ void Dialog::keyPressEvent(QKeyEvent* event) {
     case Qt::Key_Return:    this->on_pushButtonStart_clicked(); break;
     case Qt::Key_Escape:    this->on_pushButtonAbort_clicked(); break;
     case Qt::Key_H:         this->on_helpNewsButton_clicked(); break;
+    default: break;
     }
     QDialog::keyPressEvent(event);
 }
diff --git a/src/filedownloader.cpp b/src/filedownloader.cpp
index 7e2574b..4da3586 100644
--- a/src/filedownloader.cpp
+++ b/src/filedownloader.cpp
@@ -26,7 +26,7 @@ bool FileDownloader::downloadFile() {
     if (this->started)
         return true;
     QNetworkReply *reply = m_WebCtrl.get(QNetworkRequest(this->url));
-    if (reply == NULL)
+    if (reply == nullptr)
         return false;
     this->started = true;
     connect(reply, SIGNAL(finished()), SLOT(fileDownloaded()));
@@ -39,14 +39,14 @@ bool FileDownloader::downloadFile() {
  */
 
 void FileDownloader::downloadFailed(QNetworkReply::NetworkError) {
-    QNetworkReply *reply = (QNetworkReply*)this->sender();
+    QNetworkReply *reply = reinterpret_cast<QNetworkReply*>(this->sender());
     killReply(reply);
     emit downloaded(this->url, QByteArray());
 }
 
 void FileDownloader::fileDownloaded() {
-    QNetworkReply *reply = (QNetworkReply*)this->sender();
-    if (reply == NULL)
+    QNetworkReply *reply = reinterpret_cast<QNetworkReply*>(this->sender());
+    if (reply == nullptr)
         return;
     QByteArray downloadedData(reply->readAll());
     killReply(reply);
@@ -55,8 +55,8 @@ void FileDownloader::fileDownloaded() {
 }
 
 void FileDownloader::downloadProgress(qint64 received, qint64 totalSize) {
-    QNetworkReply *reply = (QNetworkReply*)this->sender();
-    if (reply == NULL)
+    QNetworkReply *reply = reinterpret_cast<QNetworkReply*>(this->sender());
+    if (reply == nullptr)
         return;
     if (received > MAXSIZE || totalSize > MAXSIZE) {
         killReply(reply);
@@ -65,7 +65,7 @@ void FileDownloader::downloadProgress(qint64 received, qint64 totalSize) {
 }
 
 void FileDownloader::killReply(QNetworkReply *reply) {
-    if (reply == NULL)
+    if (reply == nullptr)
         return;
     reply->blockSignals(true);
     reply->abort();
diff --git a/src/globals.h b/src/globals.h
index d0f1c75..707182e 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -9,6 +9,8 @@
 #define VMCHOOSER_DEFAULT_WIDTH 800
 #define VMCHOOSER_DEFAULT_HEIGHT 600
 
+#include <QString>
+
 class Session;
 
 extern bool g_debugMode;
diff --git a/src/main.cpp b/src/main.cpp
index 41600a6..46d8bc5 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -234,7 +234,7 @@ int main(int argc, char *argv[]) {
             g_forLocationHandling = LOCATION_EXCLUSIVE;
         } else {
             qDebug() << "Invalid location mode: " << mode;
-            QMessageBox::critical(NULL, "Error", "Invalid location mode: " + mode);
+            QMessageBox::critical(nullptr, "Error", "Invalid location mode: " + mode);
             return 1;
         }
     }
@@ -247,7 +247,7 @@ int main(int argc, char *argv[]) {
             g_templateHandling = LOCATION_BUMP;
         } else {
             qDebug() << "Invalid template mode: " << mode;
-            QMessageBox::critical(NULL, "Error", "Invalid template mode: " + mode);
+            QMessageBox::critical(nullptr, "Error", "Invalid template mode: " + mode);
             return 1;
         }
     }
@@ -339,7 +339,7 @@ int main(int argc, char *argv[]) {
 
     // center dialog on primary screen
     QPoint center = desktopRect.center();
-    w.move(center.x() - w.width() * 0.5, center.y() - w.height() * 0.5);
+    w.move(center.x() - w.width() / 2, center.y() - w.height() / 2);
     a.setActiveWindow(&w);
 
     return a.exec();
diff --git a/src/session.h b/src/session.h
index ec7ae7a..2b50a56 100644
--- a/src/session.h
+++ b/src/session.h
@@ -7,7 +7,7 @@ class QString;
 class QIcon;
 
 enum SectionType {
-    SECTION_NULL,
+    SECTION_nullptr,
     SECTION_XSESSION,
     SECTION_FOR_LOCATION,
     SECTION_TEMPLATES,
diff --git a/src/sessionsiconholder.cpp b/src/sessionsiconholder.cpp
index 5a1824e..5180658 100644
--- a/src/sessionsiconholder.cpp
+++ b/src/sessionsiconholder.cpp
@@ -19,7 +19,7 @@
 #include "sessiontreemodel.h"
 #include "filedownloader.h"
 
-SessionsIconHolder* SessionsIconHolder::instance = NULL;
+SessionsIconHolder* SessionsIconHolder::instance = nullptr;
 
 static inline QString url2filename(const QString& url) {
     return TEMP_PATH_ICONS + QString(QCryptographicHash::hash(url.toUtf8(), QCryptographicHash::Md5).toHex());
diff --git a/src/sessionsiconholder.h b/src/sessionsiconholder.h
index 8935606..06ca73c 100644
--- a/src/sessionsiconholder.h
+++ b/src/sessionsiconholder.h
@@ -35,7 +35,7 @@ signals:
 public:
     QIcon getIcon(const QString& name);
     QIcon getIcon(const QUrl& url);
-    static SessionsIconHolder* get() { if (instance == NULL) instance = new SessionsIconHolder(); return instance; }
+    static SessionsIconHolder* get() { if (instance == nullptr) instance = new SessionsIconHolder(); return instance; }
 
 public slots:
     void afterDownload(const QUrl& url, const QByteArray& downloadedData);
diff --git a/src/sessiontreeitem.cpp b/src/sessiontreeitem.cpp
index 5f3c28e..c95b5cf 100644
--- a/src/sessiontreeitem.cpp
+++ b/src/sessiontreeitem.cpp
@@ -11,7 +11,7 @@ QString SessionTreeItem::typeToName(const SectionType type) {
         return QCoreApplication::instance()->translate("Dialog", "Working environments");
     case SECTION_XSESSION:
         return QCoreApplication::instance()->translate("Dialog", "X-Sessions");
-    case SECTION_NULL:
+    case SECTION_nullptr:
         return "<null>";
     default:
         break;
@@ -24,11 +24,11 @@ SessionTreeItem::SessionTreeItem(const Session* session, SessionTreeItem *parent
 }
 
 SessionTreeItem::SessionTreeItem(const SectionType type, SessionTreeItem *parent)
-    : parent_(parent), session_(NULL), sectionType_(type), text_(typeToName(type)) {
+    : parent_(parent), session_(nullptr), sectionType_(type), text_(typeToName(type)) {
 }
 
 SessionTreeItem::SessionTreeItem(const QString& text, SessionTreeItem *parent)
-    : parent_(parent), session_(NULL), sectionType_(SECTION_NULL), text_(text) {
+    : parent_(parent), session_(nullptr), sectionType_(SECTION_nullptr), text_(text) {
 }
 
 SessionTreeItem::~SessionTreeItem() {
diff --git a/src/sessiontreeitem.h b/src/sessiontreeitem.h
index 6202b62..7c1a58f 100644
--- a/src/sessiontreeitem.h
+++ b/src/sessiontreeitem.h
@@ -10,9 +10,9 @@
 
 class SessionTreeItem {
   public:
-    SessionTreeItem(const Session* session, SessionTreeItem *parent = 0);
-    SessionTreeItem(const SectionType type, SessionTreeItem *parent = 0);
-    SessionTreeItem(const QString& text, SessionTreeItem *parent = 0);
+    SessionTreeItem(const Session* session, SessionTreeItem *parent = nullptr);
+    SessionTreeItem(const SectionType type, SessionTreeItem *parent = nullptr);
+    SessionTreeItem(const QString& text, SessionTreeItem *parent = nullptr);
     ~SessionTreeItem();
 
     void appendChild(SessionTreeItem *child);
diff --git a/src/sessiontreemodel.cpp b/src/sessiontreemodel.cpp
index ac60ee9..bb96f0e 100644
--- a/src/sessiontreemodel.cpp
+++ b/src/sessiontreemodel.cpp
@@ -13,7 +13,7 @@
 
 SessionTreeModel::SessionTreeModel(QObject *parent)
     : QAbstractItemModel(parent) {
-    root_ = new SessionTreeItem(SECTION_NULL);
+    root_ = new SessionTreeItem(SECTION_nullptr);
 }
 
 SessionTreeModel::~SessionTreeModel() {
@@ -70,7 +70,7 @@ QVariant SessionTreeModel::data(const QModelIndex &index, int role) const {
 
 Qt::ItemFlags SessionTreeModel::flags(const QModelIndex &index) const {
     if (!index.isValid()) {
-        return 0;
+        return Qt::NoItemFlags;
     }
 
     SessionTreeItem* item =
@@ -128,22 +128,19 @@ QModelIndex SessionTreeModel::parent(const QModelIndex &index) const {
 }
 
 void SessionTreeModel::addItems(const QList<Session*>& sessions) {
-   SessionTreeItem* parentItem;
-
     foreach (Session* s, sessions) {
-        bool sectionExists = false;
+        SessionTreeItem* parentItem = nullptr;
         SectionType section = s->section();
 
         for (int i = 0; i < root_->childCount(); ++i) {
             SessionTreeItem* item = root_->child(i);
             if (item->sectionType() == section) {
                 parentItem = item;
-                sectionExists = true;
                 break;
             }
         }
 
-        if (!sectionExists) {
+        if (parentItem == nullptr) {
             parentItem = new SessionTreeItem(section, root_);
             root_->appendChild(parentItem);
         }
@@ -168,7 +165,7 @@ void SessionTreeModel::removeItem(const QString& name) {
 static void lookDeeper(QList<Session*>& result, QList<QString>& items, SessionTreeItem* root) {
     for (int i = 0; i < root->childCount(); ++i) {
         SessionTreeItem* item = root->child(i);
-        if (item->session() != NULL && item->session()->containsKeywords(items)) {
+        if (item->session() != nullptr && item->session()->containsKeywords(items)) {
             result.append(const_cast<Session*>(item->session()));
         }
         lookDeeper(result, items, item);
@@ -198,7 +195,7 @@ QList<Session*> SessionTreeModel::lookForItem(const QString& label) {
 QModelIndex SessionTreeModel::getSection(const SectionType type) {
     for (int i = 0; i < root_->childCount(); ++i) {
         SessionTreeItem* item = root_->child(i);
-        if (item->sectionType() == type && item->session() == NULL) {
+        if (item->sectionType() == type && item->session() == nullptr) {
             return createIndex(i, 0, item);
         }
     }
diff --git a/src/sessiontreemodel.h b/src/sessiontreemodel.h
index 6a55eed..febd0aa 100644
--- a/src/sessiontreemodel.h
+++ b/src/sessiontreemodel.h
@@ -13,7 +13,7 @@ class SessionTreeModel : public QAbstractItemModel {
     Q_OBJECT
 
   public:
-    explicit SessionTreeModel(QObject *parent = 0);
+    explicit SessionTreeModel(QObject *parent = nullptr);
     ~SessionTreeModel();
 
     QVariant data(const QModelIndex &index, int role) const;
diff --git a/src/vsession.cpp b/src/vsession.cpp
index fc58927..e35c1af 100644
--- a/src/vsession.cpp
+++ b/src/vsession.cpp
@@ -261,7 +261,7 @@ bool VSession::run() const {
     }
 
     if (g_noVtx && is64Bit()) {
-        QMessageBox::warning(NULL, QObject::trUtf8("Warning"),
+        QMessageBox::warning(nullptr, QObject::trUtf8("Warning"),
                 QObject::trUtf8("The selected session is based on a 64 bit operating system,"
                         " but this computer doesn't seem to support this (VT-x/AMD-V not"
                         " supported by CPU, or disabled in BIOS). You will probably get an"
diff --git a/src/vsession.h b/src/vsession.h
index bd0f7a2..08885cc 100644
--- a/src/vsession.h
+++ b/src/vsession.h
@@ -7,6 +7,7 @@
 #include <QDir>
 #include "session.h"
 #include "httpxmldownloader.h"
+#include "globals.h"
 
 enum ImgType {
     VMWARE,