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-rw-r--r--examples/tools/settingseditor/settingstree.cpp263
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diff --git a/examples/tools/settingseditor/settingstree.cpp b/examples/tools/settingseditor/settingstree.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "settingstree.h"
+#include "variantdelegate.h"
+
+SettingsTree::SettingsTree(QWidget *parent)
+ : QTreeWidget(parent)
+{
+ setItemDelegate(new VariantDelegate(this));
+
+ QStringList labels;
+ labels << tr("Setting") << tr("Type") << tr("Value");
+ setHeaderLabels(labels);
+ header()->setResizeMode(0, QHeaderView::Stretch);
+ header()->setResizeMode(2, QHeaderView::Stretch);
+
+ settings = 0;
+ refreshTimer.setInterval(2000);
+ autoRefresh = false;
+
+ 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, SIGNAL(timeout()), this, SLOT(maybeRefresh()));
+}
+
+void SettingsTree::setSettingsObject(QSettings *settings)
+{
+ delete this->settings;
+ this->settings = settings;
+ clear();
+
+ if (settings) {
+ settings->setParent(this);
+ refresh();
+ if (autoRefresh)
+ refreshTimer.start();
+ } else {
+ refreshTimer.stop();
+ }
+}
+
+QSize SettingsTree::sizeHint() const
+{
+ return QSize(800, 600);
+}
+
+void SettingsTree::setAutoRefresh(bool autoRefresh)
+{
+ this->autoRefresh = autoRefresh;
+ if (settings) {
+ if (autoRefresh) {
+ maybeRefresh();
+ refreshTimer.start();
+ } else {
+ refreshTimer.stop();
+ }
+ }
+}
+
+void SettingsTree::setFallbacksEnabled(bool enabled)
+{
+ if (settings) {
+ settings->setFallbacksEnabled(enabled);
+ refresh();
+ }
+}
+
+void SettingsTree::maybeRefresh()
+{
+ if (state() != EditingState)
+ refresh();
+}
+
+void SettingsTree::refresh()
+{
+ if (!settings)
+ return;
+
+ disconnect(this, SIGNAL(itemChanged(QTreeWidgetItem *, int)),
+ this, SLOT(updateSetting(QTreeWidgetItem *)));
+
+ settings->sync();
+ updateChildItems(0);
+
+ connect(this, SIGNAL(itemChanged(QTreeWidgetItem *, int)),
+ this, SLOT(updateSetting(QTreeWidgetItem *)));
+}
+
+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) + "/");
+ ancestor = ancestor->parent();
+ }
+
+ settings->setValue(key, item->data(2, Qt::UserRole));
+ if (autoRefresh)
+ refresh();
+}
+
+void SettingsTree::updateChildItems(QTreeWidgetItem *parent)
+{
+ int dividerIndex = 0;
+
+ foreach (QString group, settings->childGroups()) {
+ QTreeWidgetItem *child;
+ int childIndex = findChild(parent, group, dividerIndex);
+ if (childIndex != -1) {
+ child = childAt(parent, childIndex);
+ child->setText(1, "");
+ child->setText(2, "");
+ 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();
+ }
+
+ foreach (QString key, settings->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.type() == QVariant::Invalid) {
+ child->setText(1, "Invalid");
+ } else {
+ 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 = 0;
+ 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)
+{
+ if (parent)
+ return parent->child(index);
+ else
+ return topLevelItem(index);
+}
+
+int SettingsTree::childCount(QTreeWidgetItem *parent)
+{
+ if (parent)
+ return parent->childCount();
+ else
+ return topLevelItemCount();
+}
+
+int SettingsTree::findChild(QTreeWidgetItem *parent, const QString &text,
+ int startIndex)
+{
+ 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);
+}
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