1 files changed, 231 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/tools/settingseditor/settingstree.cpp b/tests/manual/examples/widgets/tools/settingseditor/settingstree.cpp
new file mode 100644
index 0000000000..5de2a8cff1
--- /dev/null
+++ b/tests/manual/examples/widgets/tools/settingseditor/settingstree.cpp
@@ -0,0 +1,231 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "settingstree.h"
+#include "variantdelegate.h"
+
+#include <QApplication>
+#include <QHeaderView>
+#include <QScreen>
+#include <QSettings>
+
+SettingsTree::SettingsTree(QWidget *parent)
+    : QTreeWidget(parent),
+      m_typeChecker(new TypeChecker)
+{
+    setItemDelegate(new VariantDelegate(m_typeChecker, this));
+
+    setHeaderLabels({tr("Setting"), tr("Type"), tr("Value")});
+    header()->setSectionResizeMode(0, QHeaderView::ResizeToContents);
+    header()->setSectionResizeMode(1, QHeaderView::ResizeToContents);
+    header()->setSectionResizeMode(2, QHeaderView::Stretch);
+
+    refreshTimer.setInterval(2000);
+
+    groupIcon.addPixmap(style()->standardPixmap(QStyle::SP_DirClosedIcon),
+                        QIcon::Normal, QIcon::Off);
+    groupIcon.addPixmap(style()->standardPixmap(QStyle::SP_DirOpenIcon),
+                        QIcon::Normal, QIcon::On);
+    keyIcon.addPixmap(style()->standardPixmap(QStyle::SP_FileIcon));
+
+    connect(&refreshTimer, &QTimer::timeout, this, &SettingsTree::maybeRefresh);
+}
+
+SettingsTree::~SettingsTree() = default;
+
+void SettingsTree::setSettingsObject(const SettingsPtr &newSettings)
+{
+    settings = newSettings;
+    clear();
+
+    if (settings.isNull()) {
+        refreshTimer.stop();
+    } else {
+        refresh();
+        if (autoRefresh)
+            refreshTimer.start();
+    }
+}
+
+QSize SettingsTree::sizeHint() const
+{
+    const QRect availableGeometry = screen()->availableGeometry();
+    return QSize(availableGeometry.width() * 2 / 3, availableGeometry.height() * 2 / 3);
+}
+
+void SettingsTree::setAutoRefresh(bool autoRefresh)
+{
+    this->autoRefresh = autoRefresh;
+    if (!settings.isNull()) {
+        if (autoRefresh) {
+            maybeRefresh();
+            refreshTimer.start();
+        } else {
+            refreshTimer.stop();
+        }
+    }
+}
+
+void SettingsTree::setFallbacksEnabled(bool enabled)
+{
+    if (!settings.isNull()) {
+        settings->setFallbacksEnabled(enabled);
+        refresh();
+    }
+}
+
+void SettingsTree::maybeRefresh()
+{
+    if (state() != EditingState)
+        refresh();
+}
+
+void SettingsTree::refresh()
+{
+    if (settings.isNull())
+        return;
+
+    disconnect(this, &QTreeWidget::itemChanged,
+               this, &SettingsTree::updateSetting);
+
+    settings->sync();
+    updateChildItems(nullptr);
+
+    connect(this, &QTreeWidget::itemChanged,
+            this, &SettingsTree::updateSetting);
+}
+
+bool SettingsTree::event(QEvent *event)
+{
+    if (event->type() == QEvent::WindowActivate) {
+        if (isActiveWindow() && autoRefresh)
+            maybeRefresh();
+    }
+    return QTreeWidget::event(event);
+}
+
+void SettingsTree::updateSetting(QTreeWidgetItem *item)
+{
+    QString key = item->text(0);
+    QTreeWidgetItem *ancestor = item->parent();
+    while (ancestor) {
+        key.prepend(ancestor->text(0) + QLatin1Char('/'));
+        ancestor = ancestor->parent();
+    }
+
+    settings->setValue(key, item->data(2, Qt::UserRole));
+    if (autoRefresh)
+        refresh();
+}
+
+void SettingsTree::updateChildItems(QTreeWidgetItem *parent)
+{
+    int dividerIndex = 0;
+
+    const QStringList childGroups = settings->childGroups();
+    for (const QString &group : childGroups) {
+        QTreeWidgetItem *child;
+        int childIndex = findChild(parent, group, dividerIndex);
+        if (childIndex != -1) {
+            child = childAt(parent, childIndex);
+            child->setText(1, QString());
+            child->setText(2, QString());
+            child->setData(2, Qt::UserRole, QVariant());
+            moveItemForward(parent, childIndex, dividerIndex);
+        } else {
+            child = createItem(group, parent, dividerIndex);
+        }
+        child->setIcon(0, groupIcon);
+        ++dividerIndex;
+
+        settings->beginGroup(group);
+        updateChildItems(child);
+        settings->endGroup();
+    }
+
+    const QStringList childKeys = settings->childKeys();
+    for (const QString &key : childKeys) {
+        QTreeWidgetItem *child;
+        int childIndex = findChild(parent, key, 0);
+
+        if (childIndex == -1 || childIndex >= dividerIndex) {
+            if (childIndex != -1) {
+                child = childAt(parent, childIndex);
+                for (int i = 0; i < child->childCount(); ++i)
+                    delete childAt(child, i);
+                moveItemForward(parent, childIndex, dividerIndex);
+            } else {
+                child = createItem(key, parent, dividerIndex);
+            }
+            child->setIcon(0, keyIcon);
+            ++dividerIndex;
+        } else {
+            child = childAt(parent, childIndex);
+        }
+
+        QVariant value = settings->value(key);
+        if (value.userType() == QMetaType::UnknownType) {
+            child->setText(1, "Invalid");
+        } else {
+            if (value.typeId() == QMetaType::QString) {
+                const QString stringValue = value.toString();
+                if (m_typeChecker->boolExp.match(stringValue).hasMatch()) {
+                    value.setValue(stringValue.compare("true", Qt::CaseInsensitive) == 0);
+                } else if (m_typeChecker->signedIntegerExp.match(stringValue).hasMatch())
+                    value.setValue(stringValue.toInt());
+            }
+
+            child->setText(1, value.typeName());
+        }
+        child->setText(2, VariantDelegate::displayText(value));
+        child->setData(2, Qt::UserRole, value);
+    }
+
+    while (dividerIndex < childCount(parent))
+        delete childAt(parent, dividerIndex);
+}
+
+QTreeWidgetItem *SettingsTree::createItem(const QString &text,
+                                          QTreeWidgetItem *parent, int index)
+{
+    QTreeWidgetItem *after = nullptr;
+    if (index != 0)
+        after = childAt(parent, index - 1);
+
+    QTreeWidgetItem *item;
+    if (parent)
+        item = new QTreeWidgetItem(parent, after);
+    else
+        item = new QTreeWidgetItem(this, after);
+
+    item->setText(0, text);
+    item->setFlags(item->flags() | Qt::ItemIsEditable);
+    return item;
+}
+
+QTreeWidgetItem *SettingsTree::childAt(QTreeWidgetItem *parent, int index) const
+{
+    return (parent ? parent->child(index) : topLevelItem(index));
+}
+
+int SettingsTree::childCount(QTreeWidgetItem *parent) const
+{
+    return (parent ? parent->childCount() : topLevelItemCount());
+}
+
+int SettingsTree::findChild(QTreeWidgetItem *parent, const QString &text,
+                            int startIndex) const
+{
+    for (int i = startIndex; i < childCount(parent); ++i) {
+        if (childAt(parent, i)->text(0) == text)
+            return i;
+    }
+    return -1;
+}
+
+void SettingsTree::moveItemForward(QTreeWidgetItem *parent, int oldIndex,
+                                   int newIndex)
+{
+    for (int i = 0; i < oldIndex - newIndex; ++i)
+        delete childAt(parent, newIndex);
+}