Hard work on feeds-related things.

resources/misc/db_init.sql

@@ -1,73 +1,75 @@
-DROP TABLE IF EXISTS Information;
+DROP TABLE IF EXISTS Information;
--- !
+-- !
-CREATE TABLE IF NOT EXISTS Information (
+CREATE TABLE IF NOT EXISTS Information (
-  key           TEXT        PRIMARY KEY,
+  key           TEXT        PRIMARY KEY,
-  value         TEXT        NOT NULL
+  value         TEXT        NOT NULL
-);
+);
--- !
+-- !
-INSERT INTO Information VALUES ('schema_version', '0.0.1');
+INSERT INTO Information VALUES ('schema_version', '0.0.1');
--- !
+-- !
-DROP TABLE IF EXISTS Categories;
+DROP TABLE IF EXISTS Categories;
--- !
+-- !
-CREATE TABLE IF NOT EXISTS Categories (
+CREATE TABLE IF NOT EXISTS Categories (
-  id             INTEGER    PRIMARY KEY,
+  id             INTEGER    PRIMARY KEY,
-  parent_id      INTEGER    NOT NULL,
+  parent_id      INTEGER    NOT NULL,
-  title          TEXT       NOT NULL UNIQUE CHECK (title != ''),
+  title          TEXT       NOT NULL UNIQUE CHECK (title != ''),
-  description    TEXT,
+  description    TEXT,
-  date_created   TEXT       NOT NULL CHECK (date_created != ''),
+  date_created   TEXT       NOT NULL CHECK (date_created != ''),
-  icon           BLOB,
+  icon           BLOB,
-  type           INTEGER    NOT NULL,
+  type           INTEGER    NOT NULL,
-  
+  
-  FOREIGN KEY (parent_id) REFERENCES Categories (id)
+  FOREIGN KEY (parent_id) REFERENCES Categories (id)
-);
+);
--- !
+-- !
-DROP TABLE IF EXISTS Feeds;
+DROP TABLE IF EXISTS Feeds;
--- !
+-- !
-CREATE TABLE IF NOT EXISTS Feeds (
+CREATE TABLE IF NOT EXISTS Feeds (
-  id             INTEGER    PRIMARY KEY,
+  id             INTEGER    PRIMARY KEY,
-  title          TEXT       NOT NULL CHECK (title != ''),
+  title          TEXT       NOT NULL CHECK (title != ''),
-  description    TEXT,
+  description    TEXT,
-  date_created   TEXT       NOT NULL CHECK (date_created != ''),
+  date_created   TEXT       NOT NULL CHECK (date_created != ''),
-  icon           BLOB,
+  icon           BLOB,
-  category       INTEGER    NOT NULL CHECK (category >= -1),
+  category       INTEGER    NOT NULL CHECK (category >= -1),
-  encoding       TEXT       NOT NULL CHECK (encoding != ''),
+  encoding       TEXT       NOT NULL CHECK (encoding != ''),
-  url            TEXT       NOT NULL UNIQUE CHECK (url != ''),
+  url            TEXT       NOT NULL UNIQUE CHECK (url != ''),
-  language       TEXT,
+  language       TEXT,
-  type           INTEGER    NOT NULL CHECK (type > 0)
+  type           INTEGER    NOT NULL CHECK (type >= 0)
-);
+);
--- !
+-- !
-DROP TABLE IF EXISTS FeedsData;
+DROP TABLE IF EXISTS FeedsData;
--- !
+-- !
-CREATE TABLE IF NOT EXISTS FeedsData (
+CREATE TABLE IF NOT EXISTS FeedsData (
-  id             INTEGER	NOT NULL,
+  id             INTEGER	NOT NULL,
-  key		     TEXT		NOT NULL,
+  key		     TEXT		NOT NULL,
-  value	         TEXT,
+  value	         TEXT,
-  
+  
-  PRIMARY KEY (id, key),
+  PRIMARY KEY (id, key),
-  FOREIGN KEY (id) REFERENCES Feeds (id)
+  FOREIGN KEY (id) REFERENCES Feeds (id)
-);
+);
--- !
+-- !
-DROP TABLE IF EXISTS Messages;
+DROP TABLE IF EXISTS Messages;
--- !
+-- !
-CREATE TABLE IF NOT EXISTS Messages (
+CREATE TABLE IF NOT EXISTS Messages (
-  id             INTEGER    PRIMARY KEY,
+  id             INTEGER    PRIMARY KEY,
-  read           INTEGER(1) NOT NULL CHECK (read >= 0 AND read <= 1) DEFAULT (0),
+  read           INTEGER(1) NOT NULL CHECK (read >= 0 AND read <= 1) DEFAULT (0),
-  deleted        INTEGER(1) NOT NULL CHECK (deleted >= 0 AND deleted <= 1) DEFAULT (0),
+  deleted        INTEGER(1) NOT NULL CHECK (deleted >= 0 AND deleted <= 1) DEFAULT (0),
-  important      INTEGER(1) NOT NULL CHECK (important >= 0 AND important <= 1) DEFAULT (0),
+  important      INTEGER(1) NOT NULL CHECK (important >= 0 AND important <= 1) DEFAULT (0),
-  feed           INTEGER    NOT NULL,
+  feed           INTEGER    NOT NULL,
-  title          TEXT       NOT NULL CHECK (title != ''),
+  title          TEXT       NOT NULL CHECK (title != ''),
-  url            TEXT,
+  url            TEXT,
-  author         TEXT,
+  author         TEXT,
-  date_created   TEXT       NOT NULL CHECK (date_created != ''),
+  date_created   TEXT       NOT NULL CHECK (date_created != ''),
-  date_updated   TEXT,
+  date_updated   TEXT,
-  contents       TEXT,
+  contents       TEXT,
-  
+  
-  FOREIGN KEY (feed) REFERENCES Feeds (id)
+  FOREIGN KEY (feed) REFERENCES Feeds (id)
-);
+);
--- !
+-- !
-INSERT INTO Feeds (title, date_created, category, encoding, url, type) VALUES ('abcd', '1994-11-05T08:15:30-05:00', -1, 'UTF-8', 'http://www.seznam1.cz', 1);
+INSERT INTO Feeds (title, date_created, category, encoding, url, type) VALUES ('qqq', '1994-11-05T08:15:30-05:00', 0, 'UTF-8', 'http://www.seznam2.cz', 1); 
-INSERT INTO Feeds (title, date_created, category, encoding, url, type) VALUES ('qqq', '1994-11-05T08:15:30-05:00', 0, 'UTF-8', 'http://www.seznam2.cz', 1); 
+INSERT INTO Feeds (title, date_created, category, encoding, url, type) VALUES ('vwvw', '1994-11-05T08:15:30-05:00', 1, 'UTF-8', 'http://www.seznam3.cz', 1); 
-INSERT INTO Feeds (title, date_created, category, encoding, url, type) VALUES ('vwvw', '1994-11-05T08:15:30-05:00', 1, 'UTF-8', 'http://www.seznam3.cz', 1); 
+INSERT INTO Feeds (title, date_created, category, encoding, url, type) VALUES ('cbcd', '1994-11-05T08:15:30-05:00', -1, 'UTF-8', 'http://www.seznam1.cz', 1);
-INSERT INTO Feeds (title, date_created, category, encoding, url, type) VALUES ('tttt', '1994-11-05T08:15:30-05:00', 1, 'UTF-8', 'http://www.seznam4.cz', 1);
+INSERT INTO Feeds (title, date_created, category, encoding, url, type) VALUES ('attt', '1994-11-05T08:15:30-05:00', 1, 'UTF-8', 'http://www.seznam4.cz', 0);
-INSERT INTO Categories (id, parent_id, title, date_created, type) VALUES (0, -1, 'aaa', '1994-11-05T08:15:30-05:00', 0);
+INSERT INTO Feeds (title, date_created, category, encoding, url, type) VALUES ('ahht', '1994-11-05T08:15:30-05:00', -1, 'UTF-8', 'http://www.seznam6.cz', 0);
-INSERT INTO Categories (id, parent_id, title, date_created, type) VALUES (1, 0, 'bbb', '1994-11-05T08:15:30-05:00', 0);
+INSERT INTO Categories (id, parent_id, title, date_created, type) VALUES (1, 0, 'bbb', '1994-11-05T08:15:30-05:00', 0);
+INSERT INTO Categories (id, parent_id, title, date_created, type) VALUES (0, -1, 'aaa', '1994-11-05T08:15:30-05:00', 0);
+INSERT INTO Categories (id, parent_id, title, date_created, type) VALUES (2, 0, 'ccc', '1994-11-05T08:15:30-05:00', 0);

src/core/databasefactory.cpp

@@ -135,6 +135,11 @@ QSqlDatabase DatabaseFactory::addConnection(const QString &connection_name) {
     // Setup database file path.
     database.setDatabaseName(db_file.fileName());
 
+    if (!database.open()) {
+      qFatal("Database was NOT opened. Delivered error message: '%s'",
+             qPrintable(database.lastError().text()));
+    }
+
     return database;
   }
 }

src/core/databasefactory.h

@@ -37,6 +37,8 @@ class DatabaseFactory : public QObject {
     QString getDatabasePath();
 
     // Database manipulators.
+
+    // NOTE: This returns OPENED database.
     QSqlDatabase addConnection(const QString &connection_name);
     QSqlDatabase getConnection(const QString &connection_name);
     void removeConnection(const QString &connection_name);

src/core/defs.h.in

@@ -26,6 +26,8 @@
 #define MAX_ZOOM_FACTOR     10.0
 #define ICON_SIZE_SETTINGS  16
 #define DATABASE_DRIVER     "QSQLITE"
+#define NO_PARENT_FEED      -1
+#define NO_PARENT_CATEGORY  -1
 
 #define APP_DB_INIT_FILE    "db_init.sql"
 #define APP_DB_INIT_SPLIT   "-- !\n"

src/core/feedsmodel.cpp

@@ -9,6 +9,7 @@
 #include "core/defs.h"
 #include "core/databasefactory.h"
 #include "gui/iconthemefactory.h"
+#include "gui/iconfactory.h"
 
 
 FeedsModel::FeedsModel(QObject *parent) : QAbstractItemModel(parent) {
@@ -22,7 +23,7 @@ FeedsModel::FeedsModel(QObject *parent) : QAbstractItemModel(parent) {
                    tr("Counts of unread/all meesages.");
 
   loadFromDatabase();
-
+/*
   FeedsModelStandardCategory *cat1 = new FeedsModelStandardCategory();
   FeedsModelStandardCategory *cat2 = new FeedsModelStandardCategory();
   FeedsModelStandardFeed *feed1 = new FeedsModelStandardFeed();
@@ -46,11 +47,13 @@ FeedsModel::FeedsModel(QObject *parent) : QAbstractItemModel(parent) {
 
   m_rootItem->appendChild(cat1);
   m_rootItem->appendChild(feed3);
+  */
 }
 
 FeedsModel::~FeedsModel() {
   qDebug("Destroying FeedsModel instance.");
   delete m_rootItem;
+  DatabaseFactory::getInstance()->removeConnection(objectName());
 }
 
 QVariant FeedsModel::data(const QModelIndex &index, int role) const {
@@ -161,15 +164,13 @@ int FeedsModel::columnCount(const QModelIndex &parent) const {
 }
 
 void FeedsModel::loadFromDatabase() {
+  qDeleteAll(m_rootItem->m_childItems);
+
   QSqlDatabase database = DatabaseFactory::getInstance()->addConnection(objectName());
-  QList<QPair<int, FeedsModelCategory*> > categories;
+  CategoryAssignment categories;
-  QList<QPair<int, FeedsModelFeed*> > feeds;
+  FeedAssignment feeds;
-
-  if (!database.open()) {
-    qFatal("Database was NOT opened. Delivered error message: '%s'",
-           qPrintable(database.lastError().text()));
-  }
 
+  // Obtain data for categories from the database.
   QSqlQuery query_categories = database.exec("SELECT * FROM Categories;");
 
   if (query_categories.lastError().isValid()) {
@@ -182,7 +183,7 @@ void FeedsModel::loadFromDatabase() {
 
     switch (type) {
       case FeedsModelCategory::Standard: {
-        QPair<int, FeedsModelCategory*> pair;
+        CategoryAssignmentItem pair;
         pair.first = query_categories.value(CAT_DB_PARENT_ID_INDEX).toInt();
         pair.second = FeedsModelStandardCategory::loadFromRecord(query_categories.record());
 
@@ -213,17 +214,82 @@ void FeedsModel::loadFromDatabase() {
       case FeedsModelFeed::StandardAtom:
       case FeedsModelFeed::StandardRdf:
       case FeedsModelFeed::StandardRss: {
-        QPair<int, FeedsModelFeed*> pair;
+        FeedAssignmentItem pair;
         pair.first = query_feeds.value(FDS_DB_CATEGORY_INDEX).toInt();
-        // TODO: pokračovat tady, ve stejnym stylu jako u kategorii
+        pair.second = FeedsModelStandardFeed::loadFromRecord(query_feeds.record());
+        pair.second->setType(type);
+
+        feeds << pair;
         break;
       }
 
-
       default:
         break;
     }
-
   }
 
+  // All data are now obtained, lets create the hierarchy.
+  assembleCategories(categories);
+  assembleFeeds(feeds);
+}
+
+QHash<int, FeedsModelCategory *> FeedsModel::getCategories(FeedsModelRootItem *root) {
+  QHash<int, FeedsModelCategory*> categories;
+
+  foreach (FeedsModelRootItem *child, root->m_childItems) {
+    FeedsModelCategory *converted = dynamic_cast<FeedsModelCategory*>(child);
+
+    if (converted != NULL) {
+      // This child is some kind of category.
+      categories.insert(converted->id(), converted);
+
+      // Moreover, add all child categories of this category.
+      categories.unite(getCategories(converted));
+    }
+  }
+
+  return categories;
+}
+
+QHash<int, FeedsModelCategory *> FeedsModel::getCategories() {
+  return getCategories(m_rootItem);
+}
+
+void FeedsModel::assembleFeeds(FeedAssignment feeds) {
+  QHash<int, FeedsModelCategory*> categories = getCategories();
+
+  foreach (FeedAssignmentItem feed, feeds) {
+    if (feed.first == NO_PARENT_CATEGORY) {
+      // This is top-level feed, add it to the root item.
+      m_rootItem->appendChild(feed.second);
+    }
+    else {
+      // This feed belongs to some category.
+      categories.value(feed.first)->appendChild(feed.second);
+    }
+  }
+}
+
+void FeedsModel::assembleCategories(CategoryAssignment categories) {
+  QHash<int, FeedsModelRootItem*> assignments;
+  assignments.insert(-1, m_rootItem);
+
+  // Add top-level categories.
+  while (!categories.isEmpty()) {
+    for (int i = 0; i < categories.size(); i++) {
+      if (assignments.contains(categories.at(i).first)) {
+        // Parent category of this category is already added.
+        assignments.value(categories.at(i).first)->appendChild(categories.at(i).second);
+
+        // Now, added category can be parent for another categories, add it.
+        assignments.insert(categories.at(i).second->id(),
+                           categories.at(i).second);
+
+        // Remove the category from the list, because it was
+        // added to the final collection.
+        categories.removeAt(i);
+        i--;
+      }
+    }
+  }
 }

src/core/feedsmodel.h

@@ -6,6 +6,13 @@
 
 
 class FeedsModelRootItem;
+class FeedsModelCategory;
+class FeedsModelFeed;
+
+typedef QList<QPair<int, FeedsModelCategory*> > CategoryAssignment;
+typedef QPair<int, FeedsModelCategory*> CategoryAssignmentItem;
+typedef QList<QPair<int, FeedsModelFeed*> > FeedAssignment;
+typedef QPair<int, FeedsModelFeed*> FeedAssignmentItem;
 
 class FeedsModel : public QAbstractItemModel {
     Q_OBJECT
@@ -24,6 +31,15 @@ class FeedsModel : public QAbstractItemModel {
 
     void loadFromDatabase();
 
+    QHash<int, FeedsModelCategory*> getCategories();
+    QHash<int, FeedsModelCategory*> getCategories(FeedsModelRootItem *root);
+
+    bool addFeed(FeedsModelFeed *feed, int parent_id);
+
+  protected:
+    void assembleCategories(CategoryAssignment categories);
+    void assembleFeeds(FeedAssignment feeds);
+
   private:
     FeedsModelRootItem *m_rootItem;
     QList<QString> m_headerData;

src/core/feedsmodelcategory.cpp

@@ -35,3 +35,11 @@ FeedsModelCategory:: Type FeedsModelCategory::type() const {
 void FeedsModelCategory::setType(const Type &type) {
   m_type = type;
 }
+
+QString FeedsModelCategory::title() const {
+  return m_title;
+}
+
+void FeedsModelCategory::setTitle(const QString &title) {
+  m_title = title;
+}

src/core/feedsmodelcategory.h

@@ -26,9 +26,12 @@ class FeedsModelCategory : public FeedsModelRootItem {
     Type type() const;
     void setType(const Type &type);
 
-  protected:
+    QString title() const;
-    Type m_type;
+    void setTitle(const QString &title);
 
+  protected:
+    QString m_title;
+    Type m_type;
 };
 
 #endif // FEEDSMODELCLASSICCATEGORY_H

src/core/feedsmodelfeed.cpp

@@ -2,7 +2,7 @@
 
 
 FeedsModelFeed::FeedsModelFeed(FeedsModelRootItem *parent_item)
-  : FeedsModelRootItem(parent_item), m_totalCount(0), m_unreadCount(1) {
+  : FeedsModelRootItem(parent_item), m_totalCount(0), m_unreadCount(0) {
 }
 
 FeedsModelFeed::~FeedsModelFeed() {
@@ -38,3 +38,10 @@ void FeedsModelFeed::setType(const Type &type) {
   m_type = type;
 }
 
+void FeedsModelFeed::setTitle(const QString &title) {
+  m_title = title;
+}
+
+QString FeedsModelFeed::title() const {
+  return m_title;
+}

src/core/feedsmodelfeed.h

@@ -30,7 +30,11 @@ class FeedsModelFeed : public FeedsModelRootItem {
     Type type() const;
     void setType(const Type &type);
 
+    QString title() const;
+    void setTitle(const QString &title);
+
   protected:
+    QString m_title;
     Type m_type;
     int m_totalCount;
     int m_unreadCount;

src/core/feedsmodelrootitem.h

@@ -8,6 +8,8 @@
 // NOTE: This class is derived to add functionality for
 // all other non-root items of FeedsModel.
 class FeedsModelRootItem {
+    friend class FeedsModel;
+
   public:
     // Constructors and destructors.
     explicit FeedsModelRootItem(FeedsModelRootItem *parent_item = NULL);

src/core/feedsmodelstandardcategory.cpp

@@ -19,7 +19,7 @@ QVariant FeedsModelStandardCategory::data(int column, int role) const {
   switch (role) {
     case Qt::DisplayRole:
       if (column == FDS_MODEL_TITLE_INDEX) {
-        return "m_title";
+        return QString("%1%2").arg(m_title, "-C");
       }
       else if (column == FDS_MODEL_COUNTS_INDEX) {
         return QString("(%1)").arg(QString::number(countOfUnreadMessages()));
@@ -56,14 +56,6 @@ FeedsModelStandardCategory *FeedsModelStandardCategory::loadFromRecord(const QSq
   return category;
 }
 
-QString FeedsModelStandardCategory::title() const {
-  return m_title;
-}
-
-void FeedsModelStandardCategory::setTitle(const QString &title) {
-  m_title = title;
-}
-
 QString FeedsModelStandardCategory::description() const {
   return m_description;
 }
@@ -79,6 +71,3 @@ QDateTime FeedsModelStandardCategory::creationDate() const {
 void FeedsModelStandardCategory::setCreationDate(const QDateTime &creation_date) {
   m_creationDate = creation_date;
 }
-
-
-

src/core/feedsmodelstandardcategory.h

@@ -20,20 +20,16 @@ class FeedsModelStandardCategory : public FeedsModelCategory {
 
     QVariant data(int column, int role) const;
 
-    static FeedsModelStandardCategory *loadFromRecord(const QSqlRecord &record);
-
-    QString title() const;
-    void setTitle(const QString &title);
-
     QString description() const;
     void setDescription(const QString &description);
 
     QDateTime creationDate() const;
     void setCreationDate(const QDateTime &creation_date);
 
+    static FeedsModelStandardCategory *loadFromRecord(const QSqlRecord &record);
+
   private:
     QDateTime m_creationDate;
-    QString m_title;
     QString m_description;
 
 };

src/core/feedsmodelstandardfeed.cpp

@@ -1,6 +1,7 @@
 #include <QVariant>
 
 #include "core/defs.h"
+#include "gui/iconfactory.h"
 #include "gui/iconthemefactory.h"
 #include "core/feedsmodelstandardfeed.h"
 
@@ -17,8 +18,56 @@ void FeedsModelStandardFeed::setDescription(const QString &description) {
   m_description = description;
 }
 
-void FeedsModelStandardFeed::setTitle(const QString &title) {
+FeedsModelStandardFeed *FeedsModelStandardFeed::loadFromRecord(const QSqlRecord &record) {
-  m_title = title;
+  FeedsModelStandardFeed *feed = new FeedsModelStandardFeed(NULL);
+
+  feed->setTitle(record.value(FDS_DB_TITLE_INDEX).toString());
+  feed->setId(record.value(FDS_DB_ID_INDEX).toInt());
+  feed->setDescription(record.value(FDS_DB_DESCRIPTION_INDEX).toString());
+  feed->setCreationDate(QDateTime::fromString(record.value(FDS_DB_DCREATED_INDEX).toString(),
+                                              Qt::ISODate));
+  feed->setIcon(IconFactory::fromByteArray(record.value(FDS_DB_ICON_INDEX).toByteArray()));
+  feed->setEncoding(record.value(FDS_DB_ENCODING_INDEX).toString());
+  feed->setUrl(record.value(FDS_DB_URL_INDEX).toString());
+  feed->setLanguage(record.value(FDS_DB_LANGUAGE_INDEX).toString());
+
+  return feed;
+}
+
+QDateTime FeedsModelStandardFeed::creationDate() const {
+  return m_creationDate;
+}
+
+void FeedsModelStandardFeed::setCreationDate(const QDateTime &creation_date) {
+  m_creationDate = creation_date;
+}
+
+QString FeedsModelStandardFeed::encoding() const {
+  return m_encoding;
+}
+
+void FeedsModelStandardFeed::setEncoding(const QString &encoding) {
+  m_encoding = encoding;
+}
+
+QString FeedsModelStandardFeed::url() const {
+  return m_url;
+}
+
+void FeedsModelStandardFeed::setUrl(const QString &url) {
+  m_url = url;
+}
+
+QString FeedsModelStandardFeed::language() const {
+  return m_language;
+}
+
+void FeedsModelStandardFeed::setLanguage(const QString &language) {
+  m_language = language;
+}
+
+QString FeedsModelStandardFeed::description() const {
+  return m_description;
 }
 
 QVariant FeedsModelStandardFeed::data(int column, int role) const {

src/core/feedsmodelstandardfeed.h

@@ -2,6 +2,7 @@
 #define FEEDSMODELSTANDARDFEED_H
 
 #include <QDateTime>
+#include <QSqlRecord>
 
 #include "core/feedsmodelfeed.h"
 
@@ -17,11 +18,25 @@ class FeedsModelStandardFeed : public FeedsModelFeed {
 
     QVariant data(int column, int role) const;
 
-    void setTitle(const QString &title);
+    // Various getters/setters.
+    QString description() const;
     void setDescription(const QString &description);
 
+    QDateTime creationDate() const;
+    void setCreationDate(const QDateTime &creation_date);
+
+    QString encoding() const;
+    void setEncoding(const QString &encoding);
+
+    QString url() const;
+    void setUrl(const QString &url);
+
+    QString language() const;
+    void setLanguage(const QString &language);
+
+    static FeedsModelStandardFeed *loadFromRecord(const QSqlRecord &record);
+
   private:
-    QString m_title;
     QDateTime m_creationDate;
     QString m_encoding;
     QString m_url;

src/core/feedsproxymodel.cpp

@@ -1,5 +1,8 @@
 #include "core/feedsproxymodel.h"
 #include "core/feedsmodel.h"
+#include "core/feedsmodelcategory.h"
+#include "core/feedsmodelfeed.h"
+#include "core/feedsmodelrootitem.h"
 
 
 FeedsProxyModel::FeedsProxyModel(QObject *parent)
@@ -8,7 +11,13 @@ FeedsProxyModel::FeedsProxyModel(QObject *parent)
 
 
 
-
+  setObjectName("FeedsProxyModel");
+  setSortRole(Qt::EditRole);
+  setSortCaseSensitivity(Qt::CaseInsensitive);
+  setFilterCaseSensitivity(Qt::CaseInsensitive);
+  setFilterKeyColumn(-1);
+  setFilterRole(Qt::EditRole);
+  setDynamicSortFilter(true);
   setSourceModel(m_sourceModel);
 }
 
@@ -22,5 +31,37 @@ FeedsModel *FeedsProxyModel::sourceModel() {
 
 bool FeedsProxyModel::lessThan(const QModelIndex &left,
                                const QModelIndex &right) const {
-  return QSortFilterProxyModel::lessThan(left, right);
+  if (left.isValid() && right.isValid()) {
+    FeedsModelRootItem *left_item = static_cast<FeedsModelRootItem*>(left.internalPointer());
+    FeedsModelRootItem *right_item = static_cast<FeedsModelRootItem*>(right.internalPointer());
+
+    FeedsModelFeed *left_feed = dynamic_cast<FeedsModelFeed*>(left_item);
+    FeedsModelFeed *right_feed = dynamic_cast<FeedsModelFeed*>(right_item);
+
+    FeedsModelCategory *left_category = dynamic_cast<FeedsModelCategory*>(left_item);
+    FeedsModelCategory *right_category = dynamic_cast<FeedsModelCategory*>(right_item);
+
+    if (left_feed != NULL && right_feed != NULL) {
+      // Both items are feeds.
+      return left_feed->title() < right_feed->title();
+    }
+    else if (left_category != NULL && right_category != NULL) {
+      // Both items are categories.
+      return left_category->title() < right_category->title();
+    }
+    else if (left_feed != NULL) {
+      // Left item is feed, right item is category.
+      return false;
+    }
+    else {
+      // Left item is category, right item is feed.
+      return true;
+    }
+
+
+    return true;
+  }
+  else {
+    return false;
+  }
 }

src/gui/feedsview.cpp

@@ -18,6 +18,11 @@ FeedsView::~FeedsView() {
   qDebug("Destroying FeedsView instance.");
 }
 
+void FeedsView::setSortingEnabled(bool enable) {
+  QTreeView::setSortingEnabled(enable);
+  header()->setSortIndicatorShown(false);
+}
+
 void FeedsView::setupAppearance() {
 #if QT_VERSION >= 0x050000
   // Setup column resize strategies.
@@ -33,6 +38,8 @@ void FeedsView::setupAppearance() {
   setUniformRowHeights(true);
   setAcceptDrops(false);
   setDragEnabled(false);
+  setSortingEnabled(true);
+  sortByColumn(0, Qt::AscendingOrder);
   setDragDropMode(QAbstractItemView::NoDragDrop);
   setAllColumnsShowFocus(true);
   setSelectionMode(QAbstractItemView::ExtendedSelection);

src/gui/feedsview.h

@@ -14,6 +14,8 @@ class FeedsView : public QTreeView {
     // Constructors and destructors.
     explicit FeedsView(QWidget *parent = 0);
     virtual ~FeedsView();
+
+    void setSortingEnabled(bool enable);
     
   protected:
     void setupAppearance();

src/main.cpp

@@ -30,7 +30,8 @@ int main(int argc, char *argv[]) {
   //: Name of language, e.g. English.
   QObject::tr("LANG_NAME");
   //: Abbreviation of language, e.g. en.
-  //: Use ISO 639-1 code here!
+  //: Use ISO 639-1 code here. They may be combined with ISO 3166-1 (alpha-2) codes.
+  //: Examples: "cs", "nl", "en", "cs_CZ", "en_GB", "en_US".
   QObject::tr("LANG_ABBREV");
   //: Version of your translation, e.g. 1.0.
   QObject::tr("LANG_VERSION");
@@ -61,13 +62,6 @@ int main(int argc, char *argv[]) {
     return EXIT_SUCCESS;
   }
 
-  // Add 3rd party plugin directory to application PATH variable.
-  // This is useful for styles, encoders, ...
-  // This is probably not needed on Windows or Linux, not sure about Mac OS X.
-#if defined(Q_OS_MAC)
-  QtSingleApplication::addLibraryPath(APP_PLUGIN_PATH);
-#endif
-
   // Add an extra path for non-system icon themes and set current icon theme
   // and skin.
   IconThemeFactory::getInstance()->setupSearchPaths();