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.

common/folder.h

@@ -0,0 +1,32 @@
+#ifndef __FOLDER_H
+#define __FOLDER_H
+
+#include "library_item.h"
+
+#include <QList>
+
+class Folder : public LibraryItem
+{
+public:
+	bool knownParent;
+	bool knownId;
+	
+    Folder():knownParent(false), knownId(false){}
+    Folder(qulonglong sid, qulonglong pid,QString fn, QString fp):knownParent(true), knownId(true){id = sid; parentId = pid;name = fn; path = fp;}
+    Folder(QString fn, QString fp):knownParent(false), knownId(false){name = fn; path = fp;}
+    Folder(const Folder &folder);
+    Folder &operator =(const Folder & other);
+    void setId(qulonglong sid){id = sid;knownId = true;}
+    void setFather(qulonglong pid){parentId = pid;knownParent = true;}
+    bool isDir() {return true;}
+    bool isFinished() const {return finished;}
+    bool isCompleted() const {return completed;}
+    void setFinished(bool b) {finished = b;}
+    void setCompleted(bool b) {completed = b;}
+
+private:
+    bool finished;
+    bool completed;
+};
+
+#endif