WIP: Adding checkbox state for selection/deselection of items.

radixwidgets/navigationitem.cc

@@ -11,6 +11,7 @@ class NavigationItem::PImpl
   NavigationItem *parent = nullptr;
   QList<NavigationItem *> children;
   QList<QVariant> data;
+  bool checked = false;
   ~PImpl();
 };
 
@@ -75,6 +76,10 @@ int NavigationItem::row() const
 
 NavigationItem *NavigationItem::parentItem() { return p->parent; }
 
+bool NavigationItem::isChecked() const { return p->checked; }
+
+void NavigationItem::setChecked(bool checked) { p->checked = checked; }
+
 NavigationItem *NavigationItem::child(int row)
 {
   return p->children.value(row);

radixwidgets/navigationitem.hh

@@ -21,6 +21,8 @@ class NavigationItem
   void setData(int column, QVariant value);
   int row() const;
   NavigationItem *parentItem();
+  bool isChecked() const;
+  void setChecked(bool checked);
 
  private:
   class PImpl;

radixwidgets/navigationmodel.cc

@@ -37,16 +37,30 @@ QVariant NavigationModel::data(const QModelIndex& index, int role) const
   radix_tagged_line("data(" << index.row() << ", " << index.column() << ")");
   if (!index.isValid()) return QVariant();
 
-  if (role != Qt::DisplayRole) return QVariant();
-
   NavigationItem* item = static_cast<NavigationItem*>(index.internalPointer());
 
+  if (Qt::CheckStateRole == role && index.column() == 0)
+    return static_cast<int>(item->isChecked() ? Qt::Checked : Qt::Unchecked);
+
+  if (role != Qt::DisplayRole) return QVariant();
   return item->data(index.column());
 }
 
 bool NavigationModel::setData(const QModelIndex& index, const QVariant& value,
                               int role)
 {
+  if (Qt::CheckStateRole == role)
+  {
+    NavigationItem* item =
+        static_cast<NavigationItem*>(index.internalPointer());
+    item->setChecked(value.toBool());
+    // signal selection/deselection
+    if (item->isChecked())
+      emit itemChecked(index);
+    else
+      emit itemUnChecked(index);
+    return true;
+  }
   return false;
 }
 
@@ -54,7 +68,10 @@ Qt::ItemFlags NavigationModel::flags(const QModelIndex& index) const
 {
   if (!index.isValid()) return QAbstractItemModel::flags(index);
 
-  return QAbstractItemModel::flags(index);
+  Qt::ItemFlags flags = Qt::ItemIsEnabled | Qt::ItemIsSelectable;
+  if (index.column() == 0) flags |= Qt::ItemIsUserCheckable;
+
+  return flags;
 }
 
 QVariant NavigationModel::headerData(int section, Qt::Orientation orientation,

radixwidgets/navigationmodel.hh

@@ -25,6 +25,10 @@ class NavigationModel : public QAbstractItemModel
   int rowCount(const QModelIndex &parent = QModelIndex()) const override;
   int columnCount(const QModelIndex &parent = QModelIndex()) const override;
 
+ signals:
+  void itemChecked(const QModelIndex &index);
+  void itemUnChecked(const QModelIndex &index);
+
  private:
   class PImpl;
   std::unique_ptr<PImpl, void (*)(PImpl *)> p;