fixes

- support QT_VERSION < 0x050400
- "Explore download dir" (under Windows)

gui/addmultipledownloadswizard.h

@@ -5,11 +5,9 @@
 #include <QWizardPage>
 #include <QNetworkProxy>
 
-QT_BEGIN_NAMESPACE
-class QCheckBox;
-class QTreeView;
-class QItemSelection;
-QT_END_NAMESPACE
+QT_FORWARD_DECLARE_CLASS(QCheckBox)
+QT_FORWARD_DECLARE_CLASS(QTreeView)
+QT_FORWARD_DECLARE_CLASS(QItemSelection)
 
 namespace Widgets {
 class ClearLineEdit;

gui/downloadinteraction.h

@@ -4,10 +4,8 @@
 #include <QObject>
 #include <QSslError>
 
-QT_BEGIN_NAMESPACE
-class QWidget;
-class QString;
-QT_END_NAMESPACE
+QT_FORWARD_DECLARE_CLASS(QString)
+QT_FORWARD_DECLARE_CLASS(QWidget)
 
 namespace Network {
 class Download;

gui/mainwindow.cpp

@@ -23,6 +23,7 @@
 
 #include <qtutilities/aboutdialog/aboutdialog.h>
 #include <qtutilities/enterpassworddialog/enterpassworddialog.h>
+#include <qtutilities/misc/desktoputils.h>
 
 #include <c++utilities/conversion/stringconversion.h>
 #include <c++utilities/chrono/timespan.h>
@@ -753,7 +754,7 @@ void MainWindow::exploreDownloadsDir()
         QMessageBox::warning(this, windowTitle(), tr("There is no download target selected."));
     } else {
         if(QDir(GeneralTargetOptionPage::targetDirectory()).exists()) {
-            QDesktopServices::openUrl(QUrl(QStringLiteral("file://%1").arg(GeneralTargetOptionPage::targetDirectory()), QUrl::TolerantMode));
+            DesktopUtils::openLocalFileOrDir(GeneralTargetOptionPage::targetDirectory());
         } else {
             QMessageBox::warning(this, windowTitle(), tr("The selected download directory doesn't exist anymore."));
         }

network/vimeodownload.cpp

@@ -31,15 +31,25 @@ VimeoDownload::VimeoDownload(const QString &id, QObject *parent) :
 
 Download *VimeoDownload::infoRequestDownload(bool &success, QString &reasonForFail)
 {
-    const auto pathParts = initialUrl().path(QUrl::FullyDecoded).splitRef(QChar('/'), QString::SkipEmptyParts);
+    const auto pathParts = initialUrl().path(QUrl::FullyDecoded).
+#if QT_VERSION >= 0x050400
+            splitRef
+#else
+            split
+#endif
+            (QChar('/'), QString::SkipEmptyParts);
     if(pathParts.size() < 2) {
         const auto &id = pathParts.back();
         bool isInt;
         id.toULongLong(&isInt);
         if(isInt) {
-            setId(id.toString());
+            setId(id
+#if QT_VERSION >= 0x050400
+                  .toString()
+#endif
+                  );
             success = true;
-            return new HttpDownload(QUrl(QStringLiteral("https://player.vimeo.com/video/%1/config").arg(id.toString())));
+            return new HttpDownload(QUrl(QStringLiteral("https://player.vimeo.com/video/%1/config").arg(this->id())));
         }
     }
     success = false;