Work on feeed model.

src/core/feedsmodel.cpp

@@ -169,7 +169,7 @@ FeedsModelRootItem *FeedsModel::itemForIndex(const QModelIndex &index) {
 }
 
 void FeedsModel::loadFromDatabase() {
-  qDeleteAll(m_rootItem->m_childItems);
+  qDeleteAll(m_rootItem->childItems());
 
   QSqlDatabase database = DatabaseFactory::getInstance()->addConnection(objectName());
   CategoryAssignment categories;
@@ -241,7 +241,7 @@ void FeedsModel::loadFromDatabase() {
 QHash<int, FeedsModelCategory *> FeedsModel::getCategories(FeedsModelRootItem *root) {
   QHash<int, FeedsModelCategory*> categories;
 
-  foreach (FeedsModelRootItem *child, root->m_childItems) {
+  foreach (FeedsModelRootItem *child, root->childItems()) {
     FeedsModelCategory *converted = dynamic_cast<FeedsModelCategory*>(child);
 
     if (converted != NULL) {

src/core/feedsmodelrootitem.cpp

@@ -37,6 +37,7 @@ void FeedsModelRootItem::appendChild(FeedsModelRootItem *child) {
 }
 
 int FeedsModelRootItem::columnCount() const {
+  // FeedsModel offers exactly two columns.
   return 2;
 }
 
@@ -45,6 +46,7 @@ int FeedsModelRootItem::row() const {
     return m_parentItem->m_childItems.indexOf(const_cast<FeedsModelRootItem*>(this));
   }
   else {
+    // This item has no parent. Therefore, its row index is 0.
     return 0;
   }
 }
@@ -57,6 +59,7 @@ QVariant FeedsModelRootItem::data(int column, int role) const {
   Q_UNUSED(column)
   Q_UNUSED(role)
 
+  // Do not return anything for the root item.
   return QVariant();
 }
 
@@ -88,3 +91,6 @@ void FeedsModelRootItem::setTitle(const QString &title) {
   m_title = title;
 }
 
+QList<FeedsModelRootItem *> FeedsModelRootItem::childItems() const {
+  return m_childItems;
+}

src/core/feedsmodelrootitem.h

@@ -8,9 +8,8 @@
 // NOTE: This class is derived to add functionality for
 // all other non-root items of FeedsModel.
 class FeedsModelRootItem {
-    friend class FeedsModel;
-
   public:
+    // Describes the kind of the item.
     enum Kind {
       RootItem,
       Feed,
@@ -22,8 +21,8 @@ class FeedsModelRootItem {
     virtual ~FeedsModelRootItem();
 
     // Basic operations.
-    virtual void setParent(FeedsModelRootItem *parent_item);
     virtual FeedsModelRootItem *parent();
+    virtual void setParent(FeedsModelRootItem *parent_item);
     virtual FeedsModelRootItem *child(int row);
     virtual void appendChild(FeedsModelRootItem *child);
     virtual int childCount() const;
@@ -36,6 +35,9 @@ class FeedsModelRootItem {
     virtual int countOfAllMessages() const;
 
     // Each item can be "updated".
+    // NOTE: This method is used in the "update worker".
+    // For example, it can fetch new messages from a remote destination
+    // and store them in a local database and so on.
     virtual void update();
 
     virtual Kind kind() const;
@@ -47,9 +49,14 @@ class FeedsModelRootItem {
     int id() const;
     void setId(int id);
 
+    // Each item has its title.
+    // NOTE: This is note entirely true for the root item.
     QString title() const;
     void setTitle(const QString &title);
 
+    // Acess to children.
+    QList<FeedsModelRootItem *> childItems() const;
+
   protected:
     Kind m_kind;
     QString m_title;