Add generic progress dialog, and derived download dialog

scwx-qt/source/scwx/qt/ui/download_dialog.hpp

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <scwx/qt/ui/progress_dialog.hpp>
+
+#include <cstddef>
+
+namespace scwx
+{
+namespace qt
+{
+namespace ui
+{
+class DownloadDialog : public ProgressDialog
+{
+   Q_OBJECT
+   Q_DISABLE_COPY_MOVE(DownloadDialog)
+
+public:
+   explicit DownloadDialog(QWidget* parent = nullptr);
+   ~DownloadDialog();
+
+   void set_filename(const std::string& filename);
+
+public slots:
+   void StartDownload();
+   void UpdateProgress(std::ptrdiff_t downloadedBytes,
+                       std::ptrdiff_t totalBytes);
+   void FinishDownload();
+   void CancelDownload();
+
+private:
+   class Impl;
+   std::unique_ptr<Impl> p;
+};
+
+} // namespace ui
+} // namespace qt
+} // namespace scwx