TreeModel: Consolidate child()/childAt() and rowCount()/childCount()

We never used the possibility to overload the virtual child() and
rowCount() functions, it's unlikely to be needed in future.

Change-Id: I7ebdf4dfc70bb0bcadea9ef3fb88f16632a95696
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/utils/treemodel.cpp

@@ -617,17 +617,12 @@ TreeItem::~TreeItem()
     removeChildren();
 }
 
-TreeItem *TreeItem::child(int pos) const
+TreeItem *TreeItem::childAt(int pos) const
 {
     QTC_ASSERT(pos >= 0, return 0);
     return pos < m_children.size() ? m_children.at(pos) : 0;
 }
 
-int TreeItem::rowCount() const
-{
-    return m_children.size();
-}
-
 QVariant TreeItem::data(int column, int role) const
 {
     Q_UNUSED(column);
@@ -651,7 +646,7 @@ Qt::ItemFlags TreeItem::flags(int column) const
 
 bool TreeItem::hasChildren() const
 {
-    return canFetchMore() || rowCount() > 0;
+    return canFetchMore() || childCount() > 0;
 }
 
 bool TreeItem::canFetchMore() const
@@ -692,11 +687,11 @@ void TreeItem::insertChild(int pos, TreeItem *item)
 
 void TreeItem::removeChildren()
 {
-    if (rowCount() == 0)
+    if (childCount() == 0)
         return;
     if (m_model) {
         QModelIndex idx = index();
-        m_model->beginRemoveRows(idx, 0, rowCount() - 1);
+        m_model->beginRemoveRows(idx, 0, childCount() - 1);
         clear();
         m_model->endRemoveRows();
     } else {
@@ -707,7 +702,7 @@ void TreeItem::removeChildren()
 void TreeItem::sortChildren(const std::function<bool(const TreeItem *, const TreeItem *)> &cmp)
 {
     if (m_model) {
-        if (const int n = rowCount()) {
+        if (const int n = childCount()) {
             QVector<TreeItem *> tmp = m_children;
             std::sort(tmp.begin(), tmp.end(), cmp);
             if (tmp == m_children) {
@@ -850,8 +845,8 @@ QModelIndex TreeModel::parent(const QModelIndex &idx) const
     if (!grandparent)
         return QModelIndex();
 
-    for (int i = 0, n = grandparent->rowCount(); i < n; ++i)
+    for (int i = 0, n = grandparent->childCount(); i < n; ++i)
-        if (grandparent->child(i) == parent)
+        if (grandparent->childAt(i) == parent)
             return createIndex(i, 0, (void*) parent);
 
     return QModelIndex();
@@ -861,12 +856,12 @@ int TreeModel::rowCount(const QModelIndex &idx) const
 {
     CHECK_INDEX(idx);
     if (!idx.isValid())
-        return m_root->rowCount();
+        return m_root->childCount();
     if (idx.column() > 0)
         return 0;
     const TreeItem *item = itemForIndex(idx);
     QTC_ASSERT(item, return 0);
-    return item->rowCount();
+    return item->childCount();
 }
 
 int TreeModel::columnCount(const QModelIndex &idx) const
@@ -985,9 +980,9 @@ QModelIndex TreeModel::index(int row, int column, const QModelIndex &parent) con
 
     const TreeItem *item = itemForIndex(parent);
     QTC_ASSERT(item, return QModelIndex());
-    if (row >= item->rowCount())
+    if (row >= item->childCount())
         return QModelIndex();
-    return createIndex(row, column, (void*)(item->child(row)));
+    return createIndex(row, column, (void*)(item->childAt(row)));
 }
 
 TreeItem *TreeModel::itemForIndex(const QModelIndex &idx) const

src/libs/utils/treemodel.h

@@ -41,10 +41,6 @@ public:
     TreeItem();
     virtual ~TreeItem();
 
-    TreeItem *parent() const { return m_parent; }
-    virtual TreeItem *child(int pos) const;
-    virtual int rowCount() const;
-
     virtual QVariant data(int column, int role) const;
     virtual bool setData(int column, const QVariant &data, int role);
     virtual Qt::ItemFlags flags(int column) const;
@@ -53,6 +49,8 @@ public:
     virtual bool canFetchMore() const;
     virtual void fetchMore() {}
 
+    TreeItem *parent() const { return m_parent; }
+
     void prependChild(TreeItem *item);
     void appendChild(TreeItem *item);
     void insertChild(int pos, TreeItem *item);
@@ -67,7 +65,7 @@ public:
 
     void setFlags(Qt::ItemFlags flags);
     int childCount() const { return m_children.size(); }
-    TreeItem *childAt(int index) const { return m_children.at(index); }
+    TreeItem *childAt(int index) const;
     QVector<TreeItem *> children() const { return m_children; }
     QModelIndex index() const;
 

src/plugins/autotest/testresultspane.cpp

@@ -338,7 +338,7 @@ void TestResultsPane::goToNext()
         if (!rootItem || !rootItem->childCount())
             return;
 
-        nextCurrentIndex = m_filterModel->mapFromSource(m_model->indexForItem(rootItem->child(0)));
+        nextCurrentIndex = m_filterModel->mapFromSource(m_model->indexForItem(rootItem->childAt(0)));
     }
 
     m_treeView->setCurrentIndex(nextCurrentIndex);

src/plugins/autotest/testtreeitem.cpp

@@ -217,7 +217,7 @@ TestTreeItem *TestTreeItem::parentItem() const
 
 TestTreeItem *TestTreeItem::childItem(int row) const
 {
-    return static_cast<TestTreeItem *>(child(row));
+    return static_cast<TestTreeItem *>(childAt(row));
 }
 
 TestTreeItem *TestTreeItem::findChildByName(const QString &name)

src/plugins/clangstaticanalyzer/clangstaticanalyzerdiagnosticmodel.cpp

@@ -273,7 +273,7 @@ QVariant ExplainingStepItem::data(int column, int role) const
         return QVariant::fromValue(static_cast<DiagnosticItem *>(parent())->diagnostic());
     case Qt::DisplayRole: {
         const int row = parent()->children().indexOf(const_cast<ExplainingStepItem *>(this)) + 1;
-        const int padding = static_cast<int>(std::log10(parent()->rowCount()))
+        const int padding = static_cast<int>(std::log10(parent()->childCount()))
                 - static_cast<int>(std::log10(row));
         return QString::fromLatin1("%1%2: %3")
                 .arg(QString(padding, QLatin1Char(' ')))

src/plugins/cmakeprojectmanager/cmakesettingspage.cpp

@@ -189,12 +189,12 @@ void CMakeToolItemModel::addCMakeTool(const CMakeTool *item, bool changed)
 
 TreeItem *CMakeToolItemModel::autoGroupItem() const
 {
-    return rootItem()->child(0);
+    return rootItem()->childAt(0);
 }
 
 TreeItem *CMakeToolItemModel::manualGroupItem() const
 {
-    return rootItem()->child(1);
+    return rootItem()->childAt(1);
 }
 
 void CMakeToolItemModel::reevaluateChangedFlag(CMakeToolTreeItem *item) const

src/plugins/debugger/console/consoleitemmodel.cpp

@@ -80,7 +80,7 @@ int ConsoleItemModel::sizeOfFile(const QFont &font)
     lastReadOnlyRow -= 2; // skip editable row
     if (lastReadOnlyRow < 0)
         return 0;
-    QString filename = static_cast<ConsoleItem *>(rootItem()->child(lastReadOnlyRow))->file();
+    QString filename = static_cast<ConsoleItem *>(rootItem()->childAt(lastReadOnlyRow))->file();
     const int pos = filename.lastIndexOf(QLatin1Char('/'));
     if (pos != -1)
         filename = filename.mid(pos + 1);

src/plugins/debugger/moduleshandler.cpp

@@ -157,8 +157,8 @@ QVariant ModuleItem::data(int column, int role) const
 static ModuleItem *moduleFromPath(TreeItem *root, const QString &modulePath)
 {
     // Recent modules are more likely to be unloaded first.
-    for (int i = root->rowCount(); --i >= 0; ) {
+    for (int i = root->childCount(); --i >= 0; ) {
-        auto item = static_cast<ModuleItem *>(root->child(i));
+        auto item = static_cast<ModuleItem *>(root->childAt(i));
         if (item->module.modulePath == modulePath)
             return item;
     }
@@ -199,8 +199,8 @@ Modules ModulesHandler::modules() const
 {
     Modules mods;
     TreeItem *root = m_model->rootItem();
-    for (int i = root->rowCount(); --i >= 0; )
+    for (int i = root->childCount(); --i >= 0; )
-        mods.append(static_cast<ModuleItem *>(root->child(i))->module);
+        mods.append(static_cast<ModuleItem *>(root->childAt(i))->module);
     return mods;
 }
 
@@ -239,15 +239,15 @@ void ModulesHandler::updateModule(const Module &module)
 void ModulesHandler::beginUpdateAll()
 {
     TreeItem *root = m_model->rootItem();
-    for (int i = root->rowCount(); --i >= 0; )
+    for (int i = root->childCount(); --i >= 0; )
-        static_cast<ModuleItem *>(root->child(i))->updated = false;
+        static_cast<ModuleItem *>(root->childAt(i))->updated = false;
 }
 
 void ModulesHandler::endUpdateAll()
 {
     TreeItem *root = m_model->rootItem();
-    for (int i = root->rowCount(); --i >= 0; ) {
+    for (int i = root->childCount(); --i >= 0; ) {
-        auto item = static_cast<ModuleItem *>(root->child(i));
+        auto item = static_cast<ModuleItem *>(root->childAt(i));
         if (!item->updated)
             m_model->destroyItem(item);
     }

src/plugins/debugger/watchhandler.cpp

@@ -1162,7 +1162,7 @@ bool WatchModel::hasChildren(const QModelIndex &idx) const
     const WatchItem *item = nonRootItemForIndex(idx);
     if (!item)
         return true;
-    if (item->rowCount() > 0)
+    if (item->childCount() > 0)
         return true;
 
     // "Can fetch more", see above.

src/plugins/projectexplorer/toolchainoptionspage.cpp

@@ -236,7 +236,7 @@ void ToolChainOptionsWidget::addToolChain(ToolChain *tc)
         }
     }
 
-    TreeItem *parent = m_model.rootItem()->child(tc->isAutoDetected() ? 0 : 1);
+    TreeItem *parent = m_model.rootItem()->childAt(tc->isAutoDetected() ? 0 : 1);
     parent->appendChild(new ToolChainTreeItem(tc, false));
 
     updateState();

src/plugins/valgrind/xmlprotocol/errorlistmodel.cpp

@@ -279,7 +279,7 @@ QVariant FrameItem::data(int column, int role) const
         return QVariant::fromValue(getErrorItem()->error());
     case Qt::DisplayRole: {
         const int row = parent()->children().indexOf(const_cast<FrameItem *>(this)) + 1;
-        const int padding = static_cast<int>(std::log10(parent()->rowCount()))
+        const int padding = static_cast<int>(std::log10(parent()->childCount()))
                 - static_cast<int>(std::log10(row));
         return QString::fromLatin1("%1%2: %3")
                 .arg(QString(padding, QLatin1Char(' ')))

tests/auto/utils/treemodel/tst_treemodel.cpp

@@ -79,7 +79,7 @@ void tst_TreeModel::testIteration()
     group2->appendChild(item21);
     group2->appendChild(item22);
 
-    QCOMPARE(r->rowCount(), 3);
+    QCOMPARE(r->childCount(), 3);
     QCOMPARE(countLevelItems(r, 1), 3);
     QCOMPARE(countLevelItems(r, 2), 6);
     QCOMPARE(countLevelItems(r, 3), 0);