diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9b6bc0c6c..abc9d409e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,6 +14,10 @@ option(USE_QT_5 "Use Qt 5 for building" OFF)
 message(STATUS "[${APP_LOW_NAME}] Welcome to ${APP_NAME} compilation process.")
 message(STATUS "[${APP_LOW_NAME}] Compilation process begins right now.")
 
+if(USE_QT_5 EQUAL false)
+  message(FATAL_ERROR "[${APP_LOW_NAME}] Only Qt 5 is supported now.")
+endif(USE_QT_5 EQUAL false)
+
 # Setup name for executable file.
 if(APPLE)
   set(EXE_NAME ${APP_UP_NAME})
diff --git a/src/core/defs.h.in b/src/core/defs.h.in
index 75d5fc897..d3ae1948b 100644
--- a/src/core/defs.h.in
+++ b/src/core/defs.h.in
@@ -2,13 +2,13 @@
 #define DEFS_H
 
 #include <QtGlobal>
+
 #if QT_VERSION >= 0x050000
 #include <qwebkitglobal.h>
 #elif QT_VERSION >= 0x040600
 #include <qwebkitversion.h>
 #endif
 
-
 #define CMAKE_VERSION       "@CMAKE_VERSION@"
 #define CMAKE_SYSTEM        "@CMAKE_SYSTEM@"
 
diff --git a/src/core/messagesmodel.cpp b/src/core/messagesmodel.cpp
index e2789688e..4b90ad764 100644
--- a/src/core/messagesmodel.cpp
+++ b/src/core/messagesmodel.cpp
@@ -11,102 +11,132 @@
 
 
 MessagesModel::MessagesModel(QObject *parent)
-  : QAbstractItemModel(parent) {
+  : QSqlTableModel(parent, DatabaseFactory::getInstance()->addConnection("MessagesModel")) {
   setObjectName("MessagesModel");
 
-  // TODO: Separovat do samostatné skupiny metod.
-  // Bude potřeba metoda "loadFeed(int feed_id)"
-  // a v te se bude volat SELECT .... FROM Messages WHERE id IN (feed_id,feed_id2)
-  // a tak dále.
-  QSqlDatabase d = DatabaseFactory::getInstance()->addConnection("MessagesModel2");
-  QSqlQuery prikaz = d.exec("SELECT id, read, deleted, important, feed, "
-                            "title, url, author, date_created, "
-                            "date_updated, contents FROM Messages;");
-
-  // TODO: Oddělit toto do samostatné metody setupIcons(),
-  // aby bylo možno měnit ikony dynamicky.
-  m_favoriteIcon = IconThemeFactory::getInstance()->fromTheme("mail-mark-important");
-  m_readIcon = IconThemeFactory::getInstance()->fromTheme("mail-mark-read");
-  m_unreadIcon = IconThemeFactory::getInstance()->fromTheme("mail-mark-unread");
-
-  // Prepare correct columns mappings.
-  m_columnMappings.insert(MSG_MODEL_READ_INDEX, MSG_DB_READ_INDEX);
-  m_columnMappings.insert(MSG_MODEL_IMPORTANT_INDEX, MSG_DB_IMPORTANT_INDEX);
-  m_columnMappings.insert(MSG_MODEL_TITLE_INDEX, MSG_DB_TITLE_INDEX);
-  m_columnMappings.insert(MSG_MODEL_AUTHOR_INDEX, MSG_DB_AUTHOR_INDEX);
-  m_columnMappings.insert(MSG_MODEL_DCREATED_INDEX, MSG_DB_DCREATED_INDEX);
-  m_columnMappings.insert(MSG_MODEL_DUPDATED_INDEX, MSG_DB_DUPDATED_INDEX);
-
-
-  QList<Message> list;
-  while (prikaz.next()) {
-    Message mess;
-    mess.m_data.append(prikaz.value(MSG_DB_ID_INDEX).toInt());
-    mess.m_data.append(prikaz.value(MSG_DB_READ_INDEX).toInt());
-    mess.m_data.append(prikaz.value(MSG_DB_DELETED_INDEX).toInt());
-    mess.m_data.append(prikaz.value(MSG_DB_IMPORTANT_INDEX).toInt());
-    mess.m_data.append(prikaz.value(MSG_DB_FEED_INDEX).toInt());
-    mess.m_data.append(prikaz.value(MSG_DB_TITLE_INDEX).toString());
-    mess.m_data.append(prikaz.value(MSG_DB_URL_INDEX).toString());
-    mess.m_data.append(prikaz.value(MSG_DB_AUTHOR_INDEX).toString());
-    mess.m_data.append(prikaz.value(MSG_DB_DCREATED_INDEX).toString());
-    mess.m_data.append(prikaz.value(MSG_DB_DUPDATED_INDEX).toString());
-    mess.m_data.append(prikaz.value(MSG_DB_CONTENTS_INDEX).toString());
-
-    list.append(mess);
-  }
-  m_messages = list;
-
   setupFonts();
+  setupIcons();
   setupHeaderData();
+
+  // Set desired table and edit strategy.
+  setEditStrategy(QSqlTableModel::OnFieldChange);
+  setTable("Messages");
+
+  loadMessages(QList<int>());
 }
 
 MessagesModel::~MessagesModel() {
   qDebug("Destroying MessagesModel instance.");
 }
 
+void MessagesModel::setupIcons() {
+  m_favoriteIcon = IconThemeFactory::getInstance()->fromTheme("mail-mark-important");
+  m_readIcon = IconThemeFactory::getInstance()->fromTheme("mail-mark-read");
+  m_unreadIcon = IconThemeFactory::getInstance()->fromTheme("mail-mark-unread");
+}
+
+void MessagesModel::fetchAll() {
+  while (canFetchMore()) {
+    fetchMore();
+  }
+}
+
 void MessagesModel::setupFonts() {
   m_normalFont = QtSingleApplication::font("MessagesView");
   m_boldFont = m_normalFont;
   m_boldFont.setBold(true);
 }
 
+void MessagesModel::loadMessages(const QList<int> feed_ids) {
+  // TODO: Doplnit "AND deleted = 0"
+
+  // Conversion of parameter.
+  QStringList stringy_ids;
+  stringy_ids.reserve(feed_ids.count());
+
+  foreach (int feed_id, feed_ids) {
+    stringy_ids.append(QString::number(feed_id));
+  }
+
+  // TODO: časem povolit.
+  //setFilter(QString("feed IN (%1) ").arg(stringy_ids.join(',')));
+  select();
+  fetchAll();
+}
+
 void MessagesModel::setupHeaderData() {
-  m_headerData << tr("Read") << tr("Important") <<
-                  tr("Title") << tr("Author") <<
-                  tr("Created on") << tr("Updated on");
+  m_headerData << tr("Id") << tr("Read") << tr("Deleted") << tr("Important") <<
+                  tr("Feed") << tr("Title") << tr("Url") << tr("Author") <<
+                  tr("Created on") << tr("Updated on") << tr("Contents");
 }
 
-Qt::ItemFlags MessagesModel::flags(const QModelIndex &index) const {
-  Q_UNUSED(index);
+Qt::ItemFlags MessagesModel::flags(const QModelIndex &idx) const {
+  Q_UNUSED(idx);
 
-  // Each item can be selected and is enabled.
-  return Qt::ItemIsSelectable | Qt::ItemIsEnabled;
+  if (m_isInEditingMode) {
+    // NOTE: Editing of model must be temporarily enabled here.
+    return Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsEditable;
+  }
+  else {
+    return Qt::ItemIsSelectable | Qt::ItemIsEnabled;
+  }
 }
 
-int MessagesModel::rowCount(const QModelIndex &parent) const {
-  Q_UNUSED(parent);
+QVariant MessagesModel::data(const QModelIndex &idx, int role) const {
+  switch (role) {
+    case Qt::DisplayRole:
+    case Qt::EditRole:
+      return QSqlTableModel::data(idx, role);
 
-  return m_messages.count();
+    case Qt::FontRole:
+      return record(idx.row()).value(MSG_DB_READ_INDEX).toInt() == 1 ?
+            m_normalFont :
+            m_boldFont;
+
+    case Qt::DecorationRole: {
+      int index_column = idx.column();
+
+      if (index_column == MSG_DB_READ_INDEX) {
+        return record(idx.row()).value(MSG_DB_READ_INDEX).toInt() == 1 ?
+              m_readIcon :
+              m_unreadIcon;
+      }
+      else {
+        return QVariant();
+      }
+    }
+
+
+    default:
+      return QVariant();
+  }
+  /*
+  if (role == Qt::FontRole && idx.column() == 1) {
+    return record(idx.row()).value(1).toInt() == 1 ? m_normalFont : m_boldFont;
+  }
+  else if (role == Qt::DecorationRole && idx.column() == 3) {
+    if (record(idx.row()).value(1).toInt() == 1) {
+      return IconThemeFactory::getInstance()->fromTheme("mail-mark-read");
+    }
+    else {
+      return IconThemeFactory::getInstance()->fromTheme("mail-mark-unread");
+    }
+  }
+  else {
+    return QSqlTableModel::data(idx, role);
+  }*/
 }
 
-int MessagesModel::columnCount(const QModelIndex &parent) const {
-  Q_UNUSED(parent);
+bool MessagesModel::setData(const QModelIndex &idx, const QVariant &value, int role) {
+  if (!idx.isValid()) {
+    return false;
+  }
 
-  return m_headerData.count();
-}
+  m_isInEditingMode = true;
+  bool set_data_result = QSqlTableModel::setData(idx, value, role);
+  m_isInEditingMode = false;
 
-QModelIndex MessagesModel::parent(const QModelIndex &child) const {
-  Q_UNUSED(child);
-
-  return QModelIndex();
-}
-
-QModelIndex MessagesModel::index(int row, int column,
-                                 const QModelIndex &parent) const {
-  Q_UNUSED(parent);
-
-  return createIndex(row, column);
+  return set_data_result;
 }
 
 QVariant MessagesModel::headerData(int section,
@@ -114,27 +144,29 @@ QVariant MessagesModel::headerData(int section,
                                    int role) const {
   Q_UNUSED(orientation);
 
-  // TODO: Ehance this with graphics and other roles.
-
   switch (role) {
     case Qt::DisplayRole:
-      if (section > MSG_MODEL_IMPORTANT_INDEX) {
+      // Display textual headers for all columns except "read" and
+      // "important" columns.
+      if (section != MSG_DB_READ_INDEX && section != MSG_DB_IMPORTANT_INDEX) {
         return m_headerData.at(section);
       }
       else {
         return QVariant();
       }
 
+      // Return RAW data for these roles.
     case Qt::ToolTipRole:
     case Qt::EditRole:
       return m_headerData.at(section);
 
+      // Display icons for "read" and "important" columns.
     case Qt::DecorationRole: {
       switch (section) {
-        case MSG_MODEL_READ_INDEX:
+        case MSG_DB_READ_INDEX:
           return m_readIcon;
 
-        case MSG_MODEL_IMPORTANT_INDEX:
+        case MSG_DB_IMPORTANT_INDEX:
           return m_favoriteIcon;
 
         default:
@@ -146,100 +178,3 @@ QVariant MessagesModel::headerData(int section,
       return QVariant();
   }
 }
-
-QVariant MessagesModel::data(int row, int column, int role) const {
-  return data(index(row, column), role);
-}
-
-QVariant MessagesModel::data(const QModelIndex &index, int role) const {
-  // TODO: Return ISO date on EditRole and human readable date on
-  // DisplayRole. EditRole is used for sorting (and ISO date can be
-  // sorted as a string.
-
-  switch (role) {
-    case Qt::EditRole:
-      // Just return RAW data.
-      return m_messages.at(index.row()).m_data.at(m_columnMappings[index.column()]);
-
-    case Qt::ToolTipRole:
-    case Qt::DisplayRole: {
-      int index_column = index.column();
-
-      if (index_column > MSG_MODEL_IMPORTANT_INDEX) {
-        return m_messages.at(index.row()).m_data.at(m_columnMappings[index_column]);
-      }
-      else {
-        return QVariant();
-      }
-    }
-
-    case Qt::FontRole:
-      return m_messages.at(index.row()).m_data.at(m_columnMappings[MSG_MODEL_READ_INDEX]).toInt() == 1 ?
-            m_normalFont :
-            m_boldFont;
-
-    case Qt::DecorationRole: {
-      int index_column = index.column();
-
-      switch (index_column) {
-        case MSG_MODEL_READ_INDEX:
-          if (m_messages.at(index.row()).m_data.at(m_columnMappings[index_column]).toInt() == 1) {
-            return m_readIcon;
-          }
-          else {
-            return m_unreadIcon;
-          }
-
-        case MSG_MODEL_IMPORTANT_INDEX:
-          if (m_messages.at(index.row()).m_data.at(m_columnMappings[index_column]).toInt() == 1) {
-            return m_favoriteIcon;
-          }
-
-        default:
-          return QVariant();
-      }
-    }
-
-    default:
-      return QVariant();
-  }
-}
-
-bool MessagesModel::setData(const QModelIndex &index, const QVariant &value,
-                            int role) {
-  Q_UNUSED(role);
-
-  m_messages[index.row()].m_data[m_columnMappings[index.column()]] = value;
-
-  QModelIndex left = this->index(index.row(), 0);
-  QModelIndex right = this->index(index.row(), columnCount() - 1);
-
-  emit dataChanged(left, right);
-  return true;
-}
-
-bool MessagesModel::setData(int row, int column, const QVariant &value) {
-  return setData(index(row, column), value);
-}
-
-const Message &MessagesModel::messageAt(int row_index) const {
-  return m_messages.at(row_index);
-}
-
-void MessagesModel::setMessageRead(int row_index, int read) {
-  //int read_column = fieldIndex("read");
-  //blockSignals(true);
-
-
-  if (data(row_index, MSG_MODEL_READ_INDEX).toInt() != read) {
-    // Old "read" status of this message differs from
-    // the new status, update it.
-    setData(row_index, MSG_MODEL_READ_INDEX, read);
-  }
-
-
-  //blockSignals(false);
-  //submitAll();
-  //emit dataChanged(index(message_row_index, 0), index(message_row_index, columnCount()));
-}
-
diff --git a/src/core/messagesmodel.h b/src/core/messagesmodel.h
index cc02a9ec8..581a7d1aa 100644
--- a/src/core/messagesmodel.h
+++ b/src/core/messagesmodel.h
@@ -1,21 +1,14 @@
 #ifndef MESSAGESMODEL_H
 #define MESSAGESMODEL_H
 
-#include <QAbstractItemModel>
+#include <QSqlTableModel>
 #include <QFont>
 #include <QIcon>
 
+#include "core/defs.h"
 
-// Representation of ONE message.
-class Message {
-  private:
-    QList<QVariant> m_data;
 
-    friend class MessagesModel;
-    friend class WebBrowser;
-};
-
-class MessagesModel : public QAbstractItemModel {
+class MessagesModel : public QSqlTableModel {
     Q_OBJECT
 
   public:
@@ -24,46 +17,40 @@ class MessagesModel : public QAbstractItemModel {
     virtual ~MessagesModel();
 
     // Model implementation.
-
-    // Data accessors/manipulators.
+    bool setData(const QModelIndex &idx, const QVariant &value, int role = Qt::EditRole);
+    QVariant data(const QModelIndex &idx, int role) const;
     QVariant headerData(int section, Qt::Orientation orientation, int role) const;
-    QVariant data(const QModelIndex &index, int role) const;
-    QVariant data(int row, int column, int role = Qt::EditRole) const;
-    bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole);
-    bool setData(int row, int column, const QVariant &value);
-    Qt::ItemFlags flags(const QModelIndex &index) const;
+    Qt::ItemFlags flags(const QModelIndex &idx) const;
 
-    // Model dimensions.
-    int rowCount(const QModelIndex &parent = QModelIndex()) const;
-    int columnCount(const QModelIndex &parent = QModelIndex()) const;
-
-    // Model navigation.
-    QModelIndex parent(const QModelIndex &child) const;
-    QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
-
-    const Message &messageAt(int row_index) const;
+  public:
+    // Sets up all icons which are used directly by this model.
+    void setupIcons();
 
   public slots:
-    // Sets "read" status of message with given row index.
-    void setMessageRead(int row_index, int read);
+    // Fetches ALL available data to the model.
+    // NOTE: This is almost needed when sorting
+    // and makes the model more predictable.
+    void fetchAll();
+
+    // Loads messages of given feeds.
+    void loadMessages(const QList<int> feed_ids);
 
   private:
+    // Sets up header data.
     void setupHeaderData();
 
     // Creates "normal" and "bold" fonts.
     void setupFonts();
 
   private:
-    QHash<int, int> m_columnMappings;
-    QList<Message> m_messages;
+    QList<QString> m_headerData;
+    bool m_isInEditingMode;
 
     QFont m_normalFont;
     QFont m_boldFont;
     QIcon m_favoriteIcon;
     QIcon m_readIcon;
     QIcon m_unreadIcon;
-    QList<QString> m_headerData;
-
 };
 
 #endif // MESSAGESMODEL_H
diff --git a/src/gui/messagesview.cpp b/src/gui/messagesview.cpp
index ff9b3367e..aed2c264b 100644
--- a/src/gui/messagesview.cpp
+++ b/src/gui/messagesview.cpp
@@ -1,4 +1,5 @@
 #include <QHeaderView>
+#include <QKeyEvent>
 
 #include "gui/messagesview.h"
 #include "core/messagesproxymodel.h"
@@ -10,6 +11,12 @@ MessagesView::MessagesView(QWidget *parent) : QTreeView(parent) {
   m_sourceModel = m_proxyModel->sourceModel();
 
   setModel(m_proxyModel);
+
+  hideColumn(0);
+  header()->setSectionResizeMode(3, QHeaderView::ResizeToContents);
+
+  // NOTE: It is recommended to call this after the model is set
+  // due to sorting performance.
   setupAppearance();
 }
 
@@ -28,13 +35,14 @@ MessagesProxyModel *MessagesView::model() {
 void MessagesView::setupAppearance() {
   header()->setStretchLastSection(true);
 
+  setUniformRowHeights(true);
   setAcceptDrops(false);
   setDragEnabled(false);
   setDragDropMode(QAbstractItemView::NoDragDrop);
   setExpandsOnDoubleClick(false);
   setRootIsDecorated(false);
   setItemsExpandable(false);
-  setSortingEnabled(false);
+  setSortingEnabled(true);
   setAllColumnsShowFocus(true);
   setSelectionMode(QAbstractItemView::ExtendedSelection);
 }
@@ -44,6 +52,10 @@ void MessagesView::selectionChanged(const QItemSelection &selected,
   QTreeView::selectionChanged(selected, deselected);
 }
 
+void MessagesView::keyPressEvent(QKeyEvent *event) {
+  QTreeView::keyPressEvent(event);
+}
+
 void MessagesView::currentChanged(const QModelIndex &current,
                                   const QModelIndex &previous) {
   QModelIndex ind = m_proxyModel->mapToSource(current);
@@ -53,9 +65,7 @@ void MessagesView::currentChanged(const QModelIndex &current,
          current.row(), current.column(),
          ind.row(), ind.column());
 
-  m_sourceModel->setMessageRead(ind.row(), 1);
-
-  emit currentMessageChanged(m_sourceModel->messageAt(ind.row()));
+  m_sourceModel->setData(m_sourceModel->index(ind.row(), 1), 1, Qt::EditRole);
 
   QTreeView::currentChanged(current, previous);
 }
diff --git a/src/gui/messagesview.h b/src/gui/messagesview.h
index e1d5e6ab3..74d2155b9 100644
--- a/src/gui/messagesview.h
+++ b/src/gui/messagesview.h
@@ -16,12 +16,15 @@ class MessagesView : public QTreeView {
     explicit MessagesView(QWidget *parent = 0);
     virtual ~MessagesView();
 
+    // Model accessors.
     MessagesProxyModel *model();
     MessagesModel *sourceModel();
 
   protected:
     void setupAppearance();
 
+    void keyPressEvent(QKeyEvent *event);
+
     void currentChanged(const QModelIndex &current,
                         const QModelIndex &previous);
 
@@ -29,7 +32,8 @@ class MessagesView : public QTreeView {
                           const QItemSelection &deselected);
 
   signals:
-    void currentMessageChanged(const Message &message);
+    // TODO: dodělat signál.
+    void currentMessageChanged(/* const Message &message */);
     void currentMessageRemoved();
 
   private:
diff --git a/src/gui/webbrowser.cpp b/src/gui/webbrowser.cpp
index 76d4a9f61..d2497d661 100644
--- a/src/gui/webbrowser.cpp
+++ b/src/gui/webbrowser.cpp
@@ -167,8 +167,9 @@ void WebBrowser::navigateToUrl(const QUrl &url) {
   }
 }
 
-void WebBrowser::navigateToMessage(const Message &message) {
+void WebBrowser::navigateToMessage() {
   // TODO: dodělat.
+  /*
   m_webView->setHtml(SkinFactory::getInstance()->getCurrentMarkup().arg(message.m_data.at(MSG_DB_TITLE_INDEX).toString(),
                                                                         tr("Check your internet connection or website address"),
                                                                         QString(),
@@ -180,7 +181,7 @@ void WebBrowser::navigateToMessage(const Message &message) {
                                                                            "<li>many other things.</li>"
                                                                            "</ul>"),
                                                                         "aa"));
-
+                                                                        */
 }
 
 void WebBrowser::updateZoomGui() {
diff --git a/src/gui/webbrowser.h b/src/gui/webbrowser.h
index ba181a552..d864bbad1 100644
--- a/src/gui/webbrowser.h
+++ b/src/gui/webbrowser.h
@@ -61,7 +61,7 @@ class WebBrowser : public TabContent {
     void navigateToUrl(const QUrl &url);
 
     // Navigates to message.
-    void navigateToMessage(const Message &message);
+    void navigateToMessage();
 
     // Zoom manipulators.
     void increaseZoom();