Qt: Add cover downloader

src/duckstation-qt/coverdownloaddialog.h

@@ -0,0 +1,53 @@
+#pragma once
+#include "common/timer.h"
+#include "common/types.h"
+#include "qtprogresscallback.h"
+#include "ui_coverdownloaddialog.h"
+#include <QtWidgets/QDialog>
+#include <array>
+#include <memory>
+#include <string>
+
+class CoverDownloadDialog final : public QDialog
+{
+  Q_OBJECT
+
+public:
+  CoverDownloadDialog(QWidget* parent = nullptr);
+  ~CoverDownloadDialog();
+
+Q_SIGNALS:
+  void coverRefreshRequested();
+
+protected:
+  void closeEvent(QCloseEvent* ev);
+
+private Q_SLOTS:
+  void onDownloadStatus(const QString& text);
+  void onDownloadProgress(int value, int range);
+  void onDownloadComplete();
+  void onStartClicked();
+  void onCloseClicked();
+  void updateEnabled();
+
+private:
+  class CoverDownloadThread : public QtAsyncProgressThread
+  {
+  public:
+    CoverDownloadThread(QWidget* parent, const QString& urls);
+    ~CoverDownloadThread();
+
+  protected:
+    void runAsync() override;
+
+  private:
+    std::vector<std::string> m_urls;
+  };
+
+  void startThread();
+  void cancelThread();
+
+  Ui::CoverDownloadDialog m_ui;
+  std::unique_ptr<CoverDownloadThread> m_thread;
+  Common::Timer m_last_refresh_time;
+};