diff options
| -rw-r--r-- | src/plugins/qtsupport/gettingstartedwelcomepage.cpp | 71 |
1 files changed, 67 insertions, 4 deletions
diff --git a/src/plugins/qtsupport/gettingstartedwelcomepage.cpp b/src/plugins/qtsupport/gettingstartedwelcomepage.cpp index e0698965e2..4407de9a06 100644 --- a/src/plugins/qtsupport/gettingstartedwelcomepage.cpp +++ b/src/plugins/qtsupport/gettingstartedwelcomepage.cpp @@ -293,12 +293,70 @@ public: } }; -class GridProxyModel : public QIdentityProxyModel +class GridProxyModel : public QAbstractItemModel { public: + using OptModelIndex = Utils::optional<QModelIndex>; + GridProxyModel() {} + void setSourceModel(QAbstractItemModel *newModel) + { + if (m_sourceModel == newModel) + return; + if (m_sourceModel) + disconnect(m_sourceModel, nullptr, this, nullptr); + m_sourceModel = newModel; + if (newModel) { + connect(newModel, &QAbstractItemModel::layoutAboutToBeChanged, this, [this] { + layoutAboutToBeChanged(); + }); + connect(newModel, &QAbstractItemModel::layoutChanged, this, [this] { layoutChanged(); }); + connect(newModel, &QAbstractItemModel::modelAboutToBeReset, this, [this] { + beginResetModel(); + }); + connect(newModel, &QAbstractItemModel::modelReset, this, [this] { endResetModel(); }); + connect(newModel, &QAbstractItemModel::rowsAboutToBeInserted, this, [this] { + beginResetModel(); + }); + connect(newModel, &QAbstractItemModel::rowsInserted, this, [this] { endResetModel(); }); + connect(newModel, &QAbstractItemModel::rowsAboutToBeRemoved, this, [this] { + beginResetModel(); + }); + connect(newModel, &QAbstractItemModel::rowsRemoved, this, [this] { endResetModel(); }); + } + } + + QAbstractItemModel *sourceModel() const + { + return m_sourceModel; + } + + QVariant data(const QModelIndex &index, int role) const final + { + const OptModelIndex sourceIndex = mapToSource(index); + if (sourceIndex) + return sourceModel()->data(*sourceIndex, role); + return QVariant(); + } + + Qt::ItemFlags flags(const QModelIndex &index) const final + { + const OptModelIndex sourceIndex = mapToSource(index); + if (sourceIndex) + return sourceModel()->flags(*sourceIndex); + return Qt::ItemFlags(); + } + + bool hasChildren(const QModelIndex &parent) const final + { + const OptModelIndex sourceParent = mapToSource(parent); + if (sourceParent) + return sourceModel()->hasChildren(*sourceParent); + return false; + } + void setColumnCount(int columnCount) { if (columnCount == m_columnCount) @@ -333,15 +391,19 @@ public: return QModelIndex(); } - QModelIndex mapToSource(const QModelIndex &proxyIndex) const final + // The items at the lower right of the grid might not correspond to source items, if + // source's row count is not N*columnCount + OptModelIndex mapToSource(const QModelIndex &proxyIndex) const { if (!proxyIndex.isValid()) return QModelIndex(); int sourceRow = proxyIndex.row() * m_columnCount + proxyIndex.column(); - return sourceModel()->index(sourceRow, 0); + if (sourceRow < sourceModel()->rowCount()) + return sourceModel()->index(sourceRow, 0); + return OptModelIndex(); } - QModelIndex mapFromSource(const QModelIndex &sourceIndex) const final + QModelIndex mapFromSource(const QModelIndex &sourceIndex) const { if (!sourceIndex.isValid()) return QModelIndex(); @@ -352,6 +414,7 @@ public: } private: + QAbstractItemModel *m_sourceModel = nullptr; int m_columnCount = 1; }; |