[GUI] Remove code for Qt < 5.9

src/Gui/GraphvizView.cpp

@@ -70,18 +70,12 @@ public:
     GraphvizWorker(QObject * parent = 0)
         : QThread(parent)
     {
-#if QT_VERSION < 0x050000
-        dotProc.moveToThread(this);
-        unflattenProc.moveToThread(this);
-#endif
     }
 
     virtual ~GraphvizWorker()
     {
-#if QT_VERSION >= 0x050000
         dotProc.moveToThread(this);
         unflattenProc.moveToThread(this);
-#endif
     }
 
     void setData(const QByteArray & data)
@@ -90,7 +84,6 @@ public:
     }
 
     void startThread() {
-#if QT_VERSION >= 0x050000
         // This doesn't actually run a thread but calls the function
         // directly in the main thread.
         // This is needed because embedding a QProcess into a QThread
@@ -98,9 +91,6 @@ public:
         run();
         // Can't use the finished() signal of QThread
         emitFinished();
-#else
-        start();
-#endif
     }
 
     void run() {
@@ -268,9 +258,7 @@ GraphvizView::GraphvizView(App::Document & _doc, QWidget* parent)
 
     // Create worker thread
     thread = new GraphvizWorker(this);
-#if QT_VERSION >= 0x050000
     connect(thread, SIGNAL(emitFinished()), this, SLOT(done()));
-#endif
     connect(thread, SIGNAL(finished()), this, SLOT(done()));
     connect(thread, SIGNAL(error()), this, SLOT(error()));
     connect(thread, SIGNAL(svgFileRead(const QByteArray &)), this, SLOT(svgFileRead(const QByteArray &)));
@@ -533,11 +521,7 @@ bool GraphvizView::onHasMsg(const char* pMsg) const
 void GraphvizView::print(QPrinter* printer)
 {
     QPainter p(printer);
-#if QT_VERSION >= 0x050300
     QRect rect = printer->pageLayout().paintRectPixels(printer->resolution());
-#else
-    QRect rect = printer->pageRect();
-#endif
     view->scene()->render(&p, rect);
     //QByteArray buffer = exportGraph(QString::fromLatin1("svg"));
     //QSvgRenderer svg(buffer);
@@ -549,11 +533,7 @@ void GraphvizView::print()
 {
     QPrinter printer(QPrinter::HighResolution);
     printer.setFullPage(true);
-#if QT_VERSION >= 0x050300
     printer.setPageOrientation(QPageLayout::Landscape);
-#else
-    printer.setOrientation(QPrinter::Landscape);
-#endif
     QPrintDialog dlg(&printer, this);
     if (dlg.exec() == QDialog::Accepted) {
         print(&printer);
@@ -583,11 +563,7 @@ void GraphvizView::printPreview()
 {
     QPrinter printer(QPrinter::HighResolution);
     printer.setFullPage(true);
-#if QT_VERSION >= 0x050300
     printer.setPageOrientation(QPageLayout::Landscape);
-#else
-    printer.setOrientation(QPrinter::Landscape);
-#endif
 
     QPrintPreviewDialog dlg(&printer, this);
     connect(&dlg, SIGNAL(paintRequested (QPrinter *)),