Add new type of view to display the content of a folder that doesn't contain comics

It is a replacement for EmptyFolderWidget for now, but it should evolve to show comics and folders

YACReaderLibrary/folder_content_view.h

@@ -0,0 +1,70 @@
+#ifndef FOLDERCONTENTVIEW_H
+#define FOLDERCONTENTVIEW_H
+
+#include <QtWidgets>
+
+#include "comic_model.h"
+
+#include "folder.h"
+#include "comic_db.h"
+
+class FolderModel;
+class ComicModel;
+class YACReaderToolBarStretch;
+
+class QQuickWidget;
+class QQmlContext;
+
+class FolderContentView : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit FolderContentView(QWidget *parent = nullptr);
+    void setModel(const QModelIndex &parent, FolderModel *model);
+    void setContinueReadingModel(ComicModel *model);
+
+signals:
+    void subfolderSelected(QModelIndex, int);
+    void openComic(const ComicDB &comic, const ComicModel::Mode mode);
+
+    // Drops
+    void copyComicsToCurrentFolder(QList<QPair<QString, QString>>);
+    void moveComicsToCurrentFolder(QList<QPair<QString, QString>>);
+
+    void openFolderContextMenu(QPoint point, Folder folder);
+    void openContinueReadingComicContextMenu(QPoint point, ComicDB comic);
+
+protected slots:
+    // void onItemClicked(const QModelIndex &mi);
+    void updateCoversSizeInContext(int width, QQmlContext *ctxt);
+    void setCoversSize(int width);
+    virtual void showEvent(QShowEvent *event) override;
+    void openFolder(int index);
+    void openComicFromContinueReadingList(int index);
+    void requestedFolderContextMenu(QPoint point, int index);
+    void requestedContinueReadingComicContextMenu(QPoint point, int index);
+
+protected:
+    QQuickWidget *view;
+    QModelIndex parent;
+
+    std::unique_ptr<ComicModel> comicModel;
+    FolderModel *folderModel;
+
+    // Drop to import
+    void dragEnterEvent(QDragEnterEvent *event) override;
+    void dropEvent(QDropEvent *event) override;
+
+private:
+    QSettings *settings;
+    QToolBar *toolbar;
+    YACReaderToolBarStretch *toolBarStretch;
+    QAction *toolBarStretchAction;
+    QWidget *coverSizeSliderWidget;
+    QSlider *coverSizeSlider;
+    QAction *coverSizeSliderAction;
+    QAction *showInfoAction;
+    QAction *showInfoSeparatorAction;
+};
+
+#endif // FOLDERCONTENTVIEW_H