QtSupport: Use natural sorting for Qt versions in settings widget

Change-Id: I4ef14a575c536e9f789fedf24937bd0f9e118f91
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/utils/treemodel.cpp

@@ -4,6 +4,7 @@
 #include "treemodel.h"
 
 #include "qtcassert.h"
+#include "stringutils.h"
 
 #include <QStack>
 #include <QSize>
@@ -1199,4 +1200,12 @@ Qt::ItemFlags StaticTreeItem::flags(int column) const
     return Qt::ItemIsEnabled;
 }
 
+bool SortModel::lessThan(const QModelIndex &source_left, const QModelIndex &source_right) const
+{
+    if (m_lessThan)
+        return lessThan(source_left, source_right);
+    return caseFriendlyCompare(sourceModel()->data(source_left).toString(),
+                               sourceModel()->data(source_right).toString()) < 0;
+}
+
 } // namespace Utils

src/libs/utils/treemodel.h

@@ -7,7 +7,7 @@
 
 #include "indexedcontainerproxyconstiterator.h"
 
-#include <QAbstractItemModel>
+#include <QSortFilterProxyModel>
 
 #include <functional>
 
@@ -344,6 +344,20 @@ public:
     }
 };
 
+// By default, does natural sorting by display name. Call setLessThan() to customize.
+class QTCREATOR_UTILS_EXPORT SortModel : public QSortFilterProxyModel
+{
+public:
+    using QSortFilterProxyModel::QSortFilterProxyModel;
+    using LessThan = std::function<bool(const QModelIndex &, const QModelIndex &)>;
+    void setLessThan(const LessThan &lessThan) { m_lessThan = lessThan; }
+
+private:
+    bool lessThan(const QModelIndex &source_left, const QModelIndex &source_right) const override;
+
+    LessThan m_lessThan;
+};
+
 } // namespace Utils
 
 Q_DECLARE_METATYPE(Utils::TreeItem *)

src/plugins/qtsupport/qtoptionspage.cpp

@@ -41,7 +41,6 @@
 #include <QLabel>
 #include <QMessageBox>
 #include <QPushButton>
-#include <QSortFilterProxyModel>
 #include <QTextBrowser>
 #include <QTreeView>
 
@@ -197,7 +196,7 @@ private:
     void updateVersionItem(QtVersionItem *item);
 
     TreeModel<TreeItem, TreeItem, QtVersionItem> *m_model;
-    QSortFilterProxyModel *m_filterModel;
+    SortModel *m_filterModel;
     TreeItem *m_autoItem;
     TreeItem *m_manualItem;
 
@@ -314,9 +313,8 @@ QtOptionsPageWidget::QtOptionsPageWidget()
     m_model->rootItem()->appendChild(m_autoItem);
     m_model->rootItem()->appendChild(m_manualItem);
 
-    m_filterModel = new QSortFilterProxyModel(this);
+    m_filterModel = new SortModel(this);
     m_filterModel->setSourceModel(m_model);
-    m_filterModel->setSortCaseSensitivity(Qt::CaseInsensitive);
 
     m_qtdirList->setModel(m_filterModel);
     m_qtdirList->setSortingEnabled(true);