Fix build and deprecation warnings with Qt 5.14

Change-Id: I1fa6b5d3105288d25717a9fe4ae93ad3f471aaca
Reviewed-on: https://code.wireshark.org/review/35727
Petri-Dish: Stig Bjørlykke <stig@bjorlykke.org>
Tested-by: Petri Dish Buildbot
Reviewed-by: Roland Knall <rknall@gmail.com>

ui/qt/models/astringlist_list_model.cpp

@@ -266,19 +266,12 @@ QVariant AStringListListUrlProxyModel::data(const QModelIndex &index, int role)
 {
     QVariant result = QIdentityProxyModel::data(index, role);
 
-    if (urls_.contains(index.column()))
+    if (role == Qt::ForegroundRole && urls_.contains(index.column())
+            && result.canConvert(QVariant::Brush))
     {
-        if (role == Qt::ForegroundRole)
-        {
-            if (result.canConvert(QVariant::Brush))
-            {
-                QBrush selected = result.value<QBrush>();
-                selected.setColor(ColorUtils::themeLinkBrush().color());
-                return selected;
-            }
-        } else if (role == Qt::TextColorRole) {
-            return QApplication::palette().link().color();
-        }
+        QBrush selected = result.value<QBrush>();
+        selected.setColor(ColorUtils::themeLinkBrush().color());
+        return selected;
     }
 
     return result;

ui/qt/models/profile_model.cpp

@@ -582,7 +582,7 @@ QVariant ProfileModel::data(const QModelIndex &index, int role) const
         return dataDisplay(index);
     case Qt::FontRole:
         return dataFontRole(index);
-    case Qt::BackgroundColorRole:
+    case Qt::BackgroundRole:
         return dataBackgroundRole(index);
     case Qt::ToolTipRole:
         return dataToolTipRole(index);

ui/qt/widgets/qcustomplot.cpp

@@ -657,7 +657,7 @@ QCPPaintBufferPixmap::~QCPPaintBufferPixmap()
 QCPPainter *QCPPaintBufferPixmap::startPainting()
 {
   QCPPainter *result = new QCPPainter(&mBuffer);
-  result->setRenderHint(QPainter::HighQualityAntialiasing);
+  result->setRenderHint(QPainter::Antialiasing);
   return result;
 }
 
@@ -14738,7 +14738,7 @@ void QCustomPlot::paintEvent(QPaintEvent *event)
   QCPPainter painter(this);
   if (painter.isActive())
   {
-    painter.setRenderHint(QPainter::HighQualityAntialiasing); // to make Antialiasing look good if using the OpenGL graphicssystem
+    painter.setRenderHint(QPainter::Antialiasing); // to make Antialiasing look good if using the OpenGL graphicssystem
     if (mBackgroundBrush.style() != Qt::NoBrush)
       painter.fillRect(mViewport, mBackgroundBrush);
     drawBackground(&painter);

ui/qt/widgets/splash_overlay.cpp

@@ -55,7 +55,7 @@ SplashOverlay::SplashOverlay(QWidget *parent) :
     QColor bg = QColor(tango_aluminium_6);
     bg.setAlphaF(0.2);
     QPalette pal;
-    pal.setColor(QPalette::Background, bg);
+    pal.setColor(QPalette::Window, bg);
     setPalette(pal);
     setAutoFillBackground(true);
 

ui/qt/wireshark_application.cpp

@@ -616,7 +616,7 @@ void WiresharkApplication::checkForDbar()
 
     // We have a list of context menu handler CLSIDs. Now look for
     // offending DLLs.
-    foreach (QString clsid, clsids.toList()) {
+    foreach (QString clsid, clsids.values()) {
         QString inproc_path = QString("HKEY_CLASSES_ROOT\\CLSID\\%1\\InprocServer32").arg(clsid);
         QSettings inproc_reg(inproc_path, QSettings::NativeFormat);
         QString inproc_default = inproc_reg.value(".").toString();