Use ComboBox as AccountRegistry view

Replace the RowLayout with a ComboBox. This permits a higher number
of accounts to be used in the application without reducing the
usability.

BUG: 460601

imports/NeoChat/Page/RoomListPage.qml

@@ -369,27 +369,17 @@ Kirigami.ScrollablePage {
     }
 
     footer: QQC2.ToolBar {
-        visible: accountList.count > 1 && !collapsedMode
+        visible: AccountRegistry.accountCount > 1 && !collapsedMode
         height: visible ? implicitHeight : 0
-        leftPadding: 0
-        rightPadding: 0
-        topPadding: 0
-        bottomPadding: 0
-        contentItem: RowLayout {
-            spacing: 0
-            Repeater {
-                id: accountList
-                model: AccountRegistry
-                delegate: Kirigami.BasicListItem {
-                    checkable: true
-                    checked: Controller.activeConnection && Controller.activeConnection.localUserId === model.connection.localUserId
-                    onClicked: Controller.activeConnection = model.connection
-                    Layout.fillWidth: true
-                    Layout.fillHeight: true
-                    text: model.connection.localUserId
-                    subtitle: model.connection.localUser.accountLabel
-                }
-            }
+
+        contentItem: QQC2.ComboBox {
+            id: accountList
+
+            model: AccountRegistry
+            textRole: "userId"
+            valueRole: "connection"
+            onActivated: Controller.activeConnection = currentValue
+            Component.onCompleted: currentIndex = indexOfValue(Controller.activeConnection)
         }
     }
 }

src/neochataccountregistry.cpp

@@ -15,6 +15,7 @@ void AccountRegistry::add(Connection *c)
     beginInsertRows(QModelIndex(), m_accounts.size(), m_accounts.size());
     m_accounts += c;
     endInsertRows();
+    emit accountCountChanged();
 }
 
 void AccountRegistry::drop(Connection *c)
@@ -23,6 +24,7 @@ void AccountRegistry::drop(Connection *c)
     m_accounts.removeOne(c);
     endRemoveRows();
     Q_ASSERT(!m_accounts.contains(c));
+    emit accountCountChanged();
 }
 
 bool AccountRegistry::isLoggedIn(const QString &userId) const
@@ -51,8 +53,13 @@ QVariant AccountRegistry::data(const QModelIndex &index, int role) const
 
     const auto account = m_accounts[index.row()];
 
-    if (role == ConnectionRole) {
-        return QVariant::fromValue(account);
+    switch (role) {
+        case ConnectionRole:
+            return QVariant::fromValue(account);
+        case UserIdRole:
+            return QVariant::fromValue(account->userId());
+        default:
+            return {};
     }
 
     return {};
@@ -69,7 +76,7 @@ int AccountRegistry::rowCount(const QModelIndex &parent) const
 
 QHash<int, QByteArray> AccountRegistry::roleNames() const
 {
-    return {{ConnectionRole, "connection"}};
+    return {{ConnectionRole, "connection"}, {UserIdRole, "userId"}};
 }
 
 bool AccountRegistry::isEmpty() const

src/neochataccountregistry.h

@@ -15,9 +15,12 @@ class Connection;
 class AccountRegistry : public QAbstractListModel
 {
     Q_OBJECT
+    Q_PROPERTY(int accountCount READ count NOTIFY accountCountChanged);
+
 public:
     enum EventRoles {
         ConnectionRole = Qt::UserRole + 1,
+        UserIdRole = Qt::DisplayRole,
     };
 
     static AccountRegistry &instance()
@@ -40,6 +43,9 @@ public:
 
     [[nodiscard]] QHash<int, QByteArray> roleNames() const override;
 
+Q_SIGNALS:
+    void accountCountChanged();
+
 private:
     AccountRegistry();