Minimum code to get multiple accounts working.

src/accountlistmodel.cpp

@@ -0,0 +1,71 @@
+#include "accountlistmodel.h"
+
+AccountListModel::AccountListModel(QObject* parent)
+    : QAbstractListModel(parent) {}
+
+void AccountListModel::setController(Controller* value) {
+  if (m_controller != value) {
+    beginResetModel();
+    m_connections.clear();
+
+    m_controller = value;
+
+    for (auto c : m_controller->connections()) m_connections.append(c);
+
+    connect(m_controller, &Controller::connectionAdded, this,
+            [=](Connection* conn) {
+              beginInsertRows(QModelIndex(), m_connections.count(),
+                              m_connections.count());
+              m_connections.append(conn);
+              endInsertRows();
+            });
+    connect(m_controller, &Controller::connectionDropped, this,
+            [=](Connection* conn) {
+              const auto it =
+                  std::find(m_connections.begin(), m_connections.end(), conn);
+              if (it == m_connections.end())
+                return;  // Already deleted, nothing to do
+              const int row = it - m_connections.begin();
+              beginRemoveRows(QModelIndex(), row, row);
+              m_connections.erase(it);
+              endRemoveRows();
+            });
+    emit controllerChanged();
+  }
+}
+
+QVariant AccountListModel::data(const QModelIndex& index, int role) const {
+  if (!index.isValid()) return QVariant();
+
+  if (index.row() >= m_controller->connections().count()) {
+    qDebug()
+        << "UserListModel, something's wrong: index.row() >= m_users.count()";
+    return QVariant();
+  }
+  auto m_connection = m_controller->connections().at(index.row());
+  if (role == NameRole) {
+    return m_connection->user()->displayname();
+  }
+  if (role == AvatarRole) {
+    return m_connection->user()->avatar(64);
+  }
+  if (role == ConnectionRole) {
+    return QVariant::fromValue(m_connection);
+  }
+
+  return QVariant();
+}
+
+int AccountListModel::rowCount(const QModelIndex& parent) const {
+  if (parent.isValid()) return 0;
+
+  return m_controller->connections().count();
+}
+
+QHash<int, QByteArray> AccountListModel::roleNames() const {
+  QHash<int, QByteArray> roles;
+  roles[NameRole] = "name";
+  roles[AvatarRole] = "avatar";
+  roles[ConnectionRole] = "connection";
+  return roles;
+}