Fixed data base info retrieving through DBHelper, value(QString) should never be used because it is really slow. All items sorting should be done at db level or using std::sort.

YACReaderLibrary/yacreader_history_controller.h

@@ -0,0 +1,62 @@
+#ifndef YACREADER_HISTORY_CONTROLLER_H
+#define YACREADER_HISTORY_CONTROLLER_H
+
+#include <QObject>
+
+#include <QModelIndex>
+
+class YACReaderHistoryController;
+
+class YACReaderLibrarySourceContainer
+{
+public:
+    enum SourceType {
+        None,
+        Folder,
+        List
+    };
+
+    explicit YACReaderLibrarySourceContainer();
+    explicit YACReaderLibrarySourceContainer(const QModelIndex & sourceModelIndex, YACReaderLibrarySourceContainer::SourceType type);
+    QModelIndex getSourceModelIndex() const;
+    YACReaderLibrarySourceContainer::SourceType getType() const;
+
+    bool operator==(const YACReaderLibrarySourceContainer& other) const;
+    bool operator!=(const YACReaderLibrarySourceContainer& other) const;
+
+protected:
+    QModelIndex sourceModelIndex;
+    YACReaderLibrarySourceContainer::SourceType type;
+
+    friend class YACReaderHistoryController;
+
+};
+
+Q_DECLARE_METATYPE(YACReaderLibrarySourceContainer)
+
+class YACReaderHistoryController : public QObject
+{
+    Q_OBJECT
+public:
+    explicit YACReaderHistoryController(QObject *parent = 0);
+
+signals:
+    void enabledForward(bool enabled);
+    void enabledBackward(bool enabled);
+    void modelIndexSelected(YACReaderLibrarySourceContainer);
+
+public slots:
+    void clear();
+    void backward();
+    void forward();
+    void updateHistory(const YACReaderLibrarySourceContainer & source);
+    YACReaderLibrarySourceContainer lastSourceContainer();
+    YACReaderLibrarySourceContainer currentSourceContainer();
+
+protected:
+    int currentFolderNavigation;
+    QList<YACReaderLibrarySourceContainer> history;
+
+};
+
+#endif // YACREADER_HISTORY_CONTROLLER_H