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Diffstat (limited to 'src/threadlistmodel.cpp')
| -rw-r--r-- | src/threadlistmodel.cpp | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/threadlistmodel.cpp b/src/threadlistmodel.cpp index 19e1153..d9882dc 100644 --- a/src/threadlistmodel.cpp +++ b/src/threadlistmodel.cpp @@ -151,6 +151,35 @@ int ThreadListModel::rowCount(const QModelIndex &parent) const return m_threads.at(parent.row()).children.size(); } +bool ThreadListModel::hasChildren(const QModelIndex &parent) const +{ + if (!parent.isValid()) + return !m_threads.isEmpty(); + + // A message row is always a leaf. Reply depth is drawn from the node's own + // depth, not from further nesting, so nothing hangs under a reply. + if (parent.parent().isValid()) + return false; + + if (parent.column() != 0) + return false; + + if (parent.row() < 0 || parent.row() >= m_threads.size()) + return false; + + const ThreadNode &node = m_threads.at(parent.row()); + + // Once loaded the children are the truth, including "there are none", which + // is how a thread whose totalCount counted duplicates stops offering an + // expander that opens onto nothing. + if (node.loaded) + return !node.children.isEmpty(); + + // Before loading, the summary's count is all there is. A thread of one + // message has no replies and must not offer an expander. + return node.summary.totalCount > 1; +} + int ThreadListModel::columnCount(const QModelIndex &parent) const { // Every level has the same columns. Returning 0 for a valid parent, as the |