Merge branch 'master' of scm.dev.nokia.troll.no:qt/qt-s60-public into merge-with-qt-master

Conflicts:
	mkspecs/common/symbian/symbian.conf
	qmake/Makefile.unix
	qmake/generators/makefile.cpp

26 files changed, 1528 insertions, 950 deletions

diff --git a/tools/assistant/tools/assistant/aboutdialog.cpp b/tools/assistant/tools/assistant/aboutdialog.cpp
index 26d488d..a9bc352 100644
--- a/tools/assistant/tools/assistant/aboutdialog.cpp
+++ b/tools/assistant/tools/assistant/aboutdialog.cpp
@@ -70,7 +70,7 @@ void AboutLabel::setText(const QString &text, const QByteArray &resources)
     TRACE_OBJ
     QDataStream in(resources);
     in >> m_resourceMap;
-    
+
     QTextBrowser::setText(text);
 }
 
@@ -96,34 +96,34 @@ QVariant AboutLabel::loadResource(int type, const QUrl &name)
 void AboutLabel::setSource(const QUrl &url)
 {
     TRACE_OBJ
-    if (url.isValid() && (!HelpViewer::isLocalUrl(url)
-        || !HelpViewer::canOpenPage(url.path()))) {
+    if (url.isValid() && (!AbstractHelpViewer::isLocalUrl(url)
+    || !AbstractHelpViewer::canOpenPage(url.path()))) {
         if (!QDesktopServices::openUrl(url)) {
             QMessageBox::warning(this, tr("Warning"),
-                         tr("Unable to launch external application.\n"),
-                         tr("OK"));
+                tr("Unable to launch external application.\n"), tr("OK"));
         }
     }
 }
 
 AboutDialog::AboutDialog(QWidget *parent)
-    : QDialog(parent, Qt::MSWindowsFixedSizeDialogHint|Qt::WindowTitleHint|Qt::WindowSystemMenuHint)
+    : QDialog(parent, Qt::MSWindowsFixedSizeDialogHint |
+        Qt::WindowTitleHint|Qt::WindowSystemMenuHint)
 {
     TRACE_OBJ
     m_pixmapLabel = 0;
     m_aboutLabel = new AboutLabel();
-    
+
     m_closeButton = new QPushButton();
     m_closeButton->setText(tr("&Close"));
-    connect(m_closeButton, SIGNAL(clicked()),
-        this, SLOT(close()));
+    connect(m_closeButton, SIGNAL(clicked()), this, SLOT(close()));
 
     m_layout = new QGridLayout(this);
     m_layout->addWidget(m_aboutLabel, 1, 0, 1, -1);
-    m_layout->addItem(new QSpacerItem(20, 10, QSizePolicy::Minimum, QSizePolicy::Fixed), 2, 1, 1, 1);
+    m_layout->addItem(new QSpacerItem(20, 10, QSizePolicy::Minimum,
+        QSizePolicy::Fixed), 2, 1, 1, 1);
     m_layout->addItem(new QSpacerItem(20, 20, QSizePolicy::Expanding), 3, 0, 1, 1);
     m_layout->addWidget(m_closeButton, 3, 1, 1, 1);
-    m_layout->addItem(new QSpacerItem(20, 20, QSizePolicy::Expanding), 3, 2, 1, 1);    
+    m_layout->addItem(new QSpacerItem(20, 20, QSizePolicy::Expanding), 3, 2, 1, 1);
 }
 
 void AboutDialog::setText(const QString &text, const QByteArray &resources)
@@ -153,7 +153,8 @@ QString AboutDialog::documentTitle() const
 void AboutDialog::updateSize()
 {
     TRACE_OBJ
-    QSize screenSize = QApplication::desktop()->availableGeometry(QCursor::pos()).size();
+    QSize screenSize = QApplication::desktop()->availableGeometry(QCursor::pos())
+        .size();
     int limit = qMin(screenSize.width()/2, 500);
 
 #ifdef Q_WS_MAC
@@ -165,7 +166,7 @@ void AboutDialog::updateSize()
 
     if (width > limit)
         width = limit;
-    
+
     QFontMetrics fm(qApp->font("QWorkspaceTitleBar"));
     int windowTitleWidth = qMin(fm.width(windowTitle()) + 50, limit);
     if (windowTitleWidth > width)
@@ -173,8 +174,8 @@ void AboutDialog::updateSize()
 
     layout()->activate();
     int height = (layout()->hasHeightForWidth())
-                     ? layout()->totalHeightForWidth(width)
-                     : layout()->totalMinimumSize().height();
+        ? layout()->totalHeightForWidth(width)
+        : layout()->totalMinimumSize().height();
     setFixedSize(width, height);
     QCoreApplication::removePostedEvents(this, QEvent::LayoutRequest);
 }
diff --git a/tools/assistant/tools/assistant/assistant.pro b/tools/assistant/tools/assistant/assistant.pro
index d57aa99..4677458 100644
--- a/tools/assistant/tools/assistant/assistant.pro
+++ b/tools/assistant/tools/assistant/assistant.pro
@@ -29,6 +29,8 @@ HEADERS += aboutdialog.h \
     filternamedialog.h \
     helpenginewrapper.h \
     helpviewer.h \
+    helpviewer_qtb.h \
+    helpviewer_qwv.h \
     indexwindow.h \
     installdialog.h \
     mainwindow.h \
@@ -55,6 +57,8 @@ SOURCES += aboutdialog.cpp \
     filternamedialog.cpp \
     helpenginewrapper.cpp \
     helpviewer.cpp \
+    helpviewer_qtb.cpp \
+    helpviewer_qwv.cpp \
     indexwindow.cpp \
     installdialog.cpp \
     main.cpp \
diff --git a/tools/assistant/tools/assistant/bookmarkdialog.cpp b/tools/assistant/tools/assistant/bookmarkdialog.cpp
index f081c15..c053b62 100644
--- a/tools/assistant/tools/assistant/bookmarkdialog.cpp
+++ b/tools/assistant/tools/assistant/bookmarkdialog.cpp
@@ -38,12 +38,12 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
-#include "tracer.h"
-
 #include "bookmarkdialog.h"
 #include "bookmarkfiltermodel.h"
 #include "bookmarkitem.h"
 #include "bookmarkmodel.h"
+#include "helpenginewrapper.h"
+#include "tracer.h"
 
 #include <QtGui/QKeyEvent>
 #include <QtGui/QMenu>
@@ -94,6 +94,10 @@ BookmarkDialog::BookmarkDialog(BookmarkModel *sourceModel, const QString &title,
 
     ui.bookmarkFolders->setCurrentIndex(0);
     ui.treeView->setCurrentIndex(ui.treeView->indexAt(QPoint(2, 2)));
+
+    const HelpEngineWrapper &helpEngine = HelpEngineWrapper::instance();
+    if (helpEngine.usesAppFont())
+        setFont(helpEngine.appFont());
 }
 
 BookmarkDialog::~BookmarkDialog()
diff --git a/tools/assistant/tools/assistant/centralwidget.cpp b/tools/assistant/tools/assistant/centralwidget.cpp
index 03af06c..dd91326 100644
--- a/tools/assistant/tools/assistant/centralwidget.cpp
+++ b/tools/assistant/tools/assistant/centralwidget.cpp
@@ -43,7 +43,8 @@
 #include "centralwidget.h"
 #include "findwidget.h"
 #include "helpenginewrapper.h"
-#include "helpviewer.h"
+#include "helpviewer_qtb.h"
+#include "helpviewer_qwv.h"
 #include "searchwidget.h"
 #include "mainwindow.h"
 #include "../shared/collectionconfiguration.h"
@@ -57,6 +58,7 @@
 #include <QtGui/QPrinter>
 #include <QtGui/QTabBar>
 #include <QtGui/QTabWidget>
+#include <QtGui/QTextBrowser>
 #include <QtGui/QToolButton>
 #include <QtGui/QPageSetupDialog>
 #include <QtGui/QPrintDialog>
@@ -70,6 +72,7 @@ namespace {
     HelpViewer* helpViewerFromTabPosition(const QTabWidget *widget,
         const QPoint &point)
     {
+        TRACE_OBJ
         QTabBar *tabBar = qFindChild<QTabBar*>(widget);
         for (int i = 0; i < tabBar->count(); ++i) {
             if (tabBar->tabRect(i).contains(point))
@@ -80,10 +83,8 @@ namespace {
     CentralWidget *staticCentralWidget = 0;
 }
 
-
 // -- CentralWidget
 
-
 CentralWidget::CentralWidget(MainWindow *parent)
     : QWidget(parent)
     , lastTabPage(0)
@@ -174,7 +175,7 @@ CentralWidget::~CentralWidget()
         HelpViewer *viewer = qobject_cast<HelpViewer*>(tabWidget->widget(i));
         if (viewer && viewer->source().isValid()) {
             currentPages << viewer->source().toString();
-            zoomFactors << QString::number(viewer->zoom());
+            zoomFactors << QString::number(viewer->scale());
         }
     }
 
@@ -208,7 +209,7 @@ void CentralWidget::zoomIn()
     TRACE_OBJ
     HelpViewer *viewer = currentHelpViewer();
     if (viewer)
-        viewer->zoomIn();
+        viewer->scaleUp();
 
     if (tabWidget->currentWidget() == m_searchWidget)
         m_searchWidget->zoomIn();
@@ -219,7 +220,7 @@ void CentralWidget::zoomOut()
     TRACE_OBJ
     HelpViewer *viewer = currentHelpViewer();
     if (viewer)
-        viewer->zoomOut();
+        viewer->scaleDown();
 
     if (tabWidget->currentWidget() == m_searchWidget)
         m_searchWidget->zoomOut();
@@ -237,9 +238,8 @@ void CentralWidget::nextPage()
 void CentralWidget::resetZoom()
 {
     TRACE_OBJ
-    HelpViewer *viewer = currentHelpViewer();
-    if (viewer)
-        viewer->resetZoom();
+    if (HelpViewer *viewer = currentHelpViewer())
+        viewer->resetScale();
 
     if (tabWidget->currentWidget() == m_searchWidget)
         m_searchWidget->resetZoom();
@@ -522,25 +522,12 @@ void CentralWidget::setSourceInNewTab(const QUrl &url, qreal zoom)
         return;
 #endif
 
-    viewer = new HelpViewer(this);
+    viewer = new HelpViewer(this, zoom);
     viewer->installEventFilter(this);
     viewer->setSource(url);
     viewer->setFocus(Qt::OtherFocusReason);
     tabWidget->setCurrentIndex(tabWidget->addTab(viewer,
         quoteTabTitle(viewer->documentTitle())));
-
-    QFont font;
-    getBrowserFontFor(viewer, &font);
-
-#if defined(QT_NO_WEBKIT)
-    font.setPointSize((int)(font.pointSize() + zoom));
-    setBrowserFontFor(viewer, font);
-    viewer->setZoom((int)zoom);
-#else
-    setBrowserFontFor(viewer, font);
-    viewer->setTextSizeMultiplier(zoom == 0.0 ? 1.0 : zoom);
-#endif
-
     connectSignals();
 }
 
@@ -579,7 +566,13 @@ void CentralWidget::connectSignals()
     }
 }
 
-HelpViewer *CentralWidget::currentHelpViewer() const
+HelpViewer* CentralWidget::viewerAt(int index) const
+{
+    TRACE_OBJ
+    return qobject_cast<HelpViewer*>(tabWidget->widget(index));
+}
+
+HelpViewer* CentralWidget::currentHelpViewer() const
 {
     TRACE_OBJ
     return qobject_cast<HelpViewer*>(tabWidget->currentWidget());
@@ -755,6 +748,7 @@ void CentralWidget::keyPressEvent(QKeyEvent *e)
 
 void CentralWidget::findNext()
 {
+    TRACE_OBJ
     find(findWidget->text(), true);
 }
 
@@ -876,21 +870,24 @@ bool CentralWidget::findInTextBrowser(const QString &ttf, bool forward)
 void CentralWidget::updateBrowserFont()
 {
     TRACE_OBJ
-    QFont font;
-    bool searchAttached = searchWidgetAttached();
+    const bool searchAttached = searchWidgetAttached();
     if (searchAttached) {
-        getBrowserFontFor(m_searchWidget, &font);
-        setBrowserFontFor(m_searchWidget, font);
+        HelpEngineWrapper &helpEngine = HelpEngineWrapper::instance();
+        m_searchWidget->setFont(helpEngine.usesBrowserFont()
+            ? helpEngine.browserFont() : qApp->font());
     }
 
-    int i = searchAttached ? 1 : 0;
-    getBrowserFontFor(tabWidget->widget(i), &font);
-    for ( ; i < tabWidget->count(); ++i)
-        setBrowserFontFor(tabWidget->widget(i), font);
+    const int count = tabWidget->count();
+    if (HelpViewer* viewer = viewerAt(count - 1)) {
+        const QFont &font = viewer->viewerFont();
+        for (int i = searchAttached ? 1 : 0; i < count; ++i)
+            viewerAt(i)->setViewerFont(font);
+    }
 }
 
 bool CentralWidget::searchWidgetAttached() const
 {
+    TRACE_OBJ
     return m_searchWidget && m_searchWidget->isAttached();
 }
 
@@ -906,9 +903,9 @@ void CentralWidget::createSearchWidget(QHelpSearchEngine *searchEngine)
     connect(m_searchWidget, SIGNAL(requestShowLinkInNewTab(QUrl)), this,
         SLOT(setSourceFromSearchInNewTab(QUrl)));
 
-    QFont font;
-    getBrowserFontFor(m_searchWidget, &font);
-    setBrowserFontFor(m_searchWidget, font);
+    HelpEngineWrapper &helpEngine = HelpEngineWrapper::instance();
+    m_searchWidget->setFont(!helpEngine.usesBrowserFont() ? qApp->font()
+        : helpEngine.browserFont());
 }
 
 void CentralWidget::activateSearchWidget(bool updateLastTabPage)
@@ -1103,41 +1100,4 @@ QMap<int, QString> CentralWidget::currentSourceFileList() const
     return sourceList;
 }
 
-void CentralWidget::getBrowserFontFor(QWidget *viewer, QFont *font)
-{
-    TRACE_OBJ
-    HelpEngineWrapper &helpEngine = HelpEngineWrapper::instance();
-    if (!helpEngine.usesBrowserFont()) {
-        *font = qApp->font();   // case for QTextBrowser and SearchWidget
-#if !defined(QT_NO_WEBKIT)
-        QWebView *view = qobject_cast<QWebView*> (viewer);
-        if (view) {
-            QWebSettings *settings = QWebSettings::globalSettings();
-            *font = QFont(settings->fontFamily(QWebSettings::StandardFont),
-                settings->fontSize(QWebSettings::DefaultFontSize));
-        }
-#endif
-    } else {
-        *font = helpEngine.browserFont();
-    }
-}
-
-void CentralWidget::setBrowserFontFor(QWidget *widget, const QFont &font)
-{
-    TRACE_OBJ
-#if !defined(QT_NO_WEBKIT)
-    QWebView *view = qobject_cast<QWebView*> (widget);
-    if (view) {
-        QWebSettings *settings = view->settings();
-        settings->setFontFamily(QWebSettings::StandardFont, font.family());
-        settings->setFontSize(QWebSettings::DefaultFontSize, font.pointSize());
-    } else if (widget && widget->font() != font) {
-        widget->setFont(font);
-    }
-#else
-    if (widget && widget->font() != font)
-        widget->setFont(font);
-#endif
-}
-
 QT_END_NAMESPACE
diff --git a/tools/assistant/tools/assistant/centralwidget.h b/tools/assistant/tools/assistant/centralwidget.h
index 6c3e93c..f286ff7 100644
--- a/tools/assistant/tools/assistant/centralwidget.h
+++ b/tools/assistant/tools/assistant/centralwidget.h
@@ -70,6 +70,8 @@ public:
     bool isBackwardAvailable() const;
     QList<QAction*> globalActions() const;
     void setGlobalActions(const QList<QAction*> &actions);
+
+    HelpViewer *viewerAt(int index) const;
     HelpViewer *currentHelpViewer() const;
 
     bool searchWidgetAttached() const;
@@ -143,9 +145,6 @@ private:
     QString quoteTabTitle(const QString &title) const;
     void setLastShownPages();
 
-    void getBrowserFontFor(QWidget* viewer, QFont *font);
-    void setBrowserFontFor(QWidget *widget, const QFont &font);
-
 private:
     int lastTabPage;
     QList<QAction*> globalActionList;
diff --git a/tools/assistant/tools/assistant/contentwindow.cpp b/tools/assistant/tools/assistant/contentwindow.cpp
index 976ed7a..e0347c8 100644
--- a/tools/assistant/tools/assistant/contentwindow.cpp
+++ b/tools/assistant/tools/assistant/contentwindow.cpp
@@ -144,7 +144,7 @@ bool ContentWindow::eventFilter(QObject *o, QEvent *e)
                     qobject_cast<QHelpContentModel*>(m_contentWidget->model());
                 if (contentModel) {
                     QHelpContentItem *itm = contentModel->contentItemAt(index);
-                    if (itm && HelpViewer::canOpenPage(itm->url().path()))
+                    if (itm && AbstractHelpViewer::canOpenPage(itm->url().path()))
                         CentralWidget::instance()->setSourceInNewTab(itm->url());
                 }
             } else if (button == Qt::LeftButton) {
@@ -170,7 +170,7 @@ void ContentWindow::showContextMenu(const QPoint &pos)
     QMenu menu;
     QAction *curTab = menu.addAction(tr("Open Link"));
     QAction *newTab = menu.addAction(tr("Open Link in New Tab"));
-    if (!HelpViewer::canOpenPage(itm->url().path()))
+    if (!AbstractHelpViewer::canOpenPage(itm->url().path()))
         newTab->setEnabled(false);
     
     menu.move(m_contentWidget->mapToGlobal(pos));
diff --git a/tools/assistant/tools/assistant/helpenginewrapper.cpp b/tools/assistant/tools/assistant/helpenginewrapper.cpp
index 76211c5..a181c71 100644
--- a/tools/assistant/tools/assistant/helpenginewrapper.cpp
+++ b/tools/assistant/tools/assistant/helpenginewrapper.cpp
@@ -112,6 +112,7 @@ private:
     QFileSystemWatcher * const m_qchWatcher;
     typedef QPair<QDateTime, QSharedPointer<TimeoutForwarder> > RecentSignal;
     QMap<QString, RecentSignal> m_recentQchUpdates;
+    bool m_initialReindexingNeeded;
 };
 
 const QString HelpEngineWrapper::TrUnfiltered = tr("Unfiltered");
@@ -141,6 +142,18 @@ HelpEngineWrapper::HelpEngineWrapper(const QString &collectionFile)
     : d(new HelpEngineWrapperPrivate(collectionFile))
 {
     TRACE_OBJ
+
+    /*
+     * Otherwise we will waste time if several new docs are found,
+     * because we will start to index them, only to be interupted
+     * by the next request. Also, there is a nasty SQLITE bug that will
+     * cause the application to hang for minutes in that case.
+     * This call is reverted by initalDocSetupDone(), which must be
+     * called after the new docs have been installed.
+     */
+    disconnect(d->m_helpEngine, SIGNAL(setupFinished()),
+            searchEngine(), SLOT(indexDocumentation()));
+
     connect(d, SIGNAL(documentationRemoved(QString)),
             this, SIGNAL(documentationRemoved(QString)));
     connect(d, SIGNAL(documentationUpdated(QString)),
@@ -157,6 +170,15 @@ HelpEngineWrapper::~HelpEngineWrapper()
     delete d;
 }
 
+void HelpEngineWrapper::initialDocSetupDone()
+{
+    TRACE_OBJ
+    connect(d->m_helpEngine, SIGNAL(setupFinished()),
+            searchEngine(), SLOT(indexDocumentation()));
+    if (d->m_initialReindexingNeeded)
+        setupData();
+}
+
 QHelpSearchEngine *HelpEngineWrapper::searchEngine() const
 {
     TRACE_OBJ
@@ -207,6 +229,7 @@ bool HelpEngineWrapper::registerDocumentation(const QString &docFile)
         return false;
     d->m_qchWatcher->addPath(docFile);
     d->checkDocFilesWatched();
+    d->m_initialReindexingNeeded = true;
     return true;
 }
 
@@ -219,6 +242,7 @@ bool HelpEngineWrapper::unregisterDocumentation(const QString &namespaceName)
         return false;
     d->m_qchWatcher->removePath(file);
     d->checkDocFilesWatched();
+    d->m_initialReindexingNeeded = true;
     return true;
 }
 
@@ -698,7 +722,8 @@ void TimeoutForwarder::forward()
 
 HelpEngineWrapperPrivate::HelpEngineWrapperPrivate(const QString &collectionFile)
     : m_helpEngine(new QHelpEngine(collectionFile, this)),
-      m_qchWatcher(new QFileSystemWatcher(this))
+      m_qchWatcher(new QFileSystemWatcher(this)),
+      m_initialReindexingNeeded(false)
 {
     TRACE_OBJ
     if (!m_helpEngine->customFilters().contains(Unfiltered))
@@ -797,6 +822,7 @@ void HelpEngineWrapperPrivate::qchFileChanged(const QString &fileName,
         } else {
             emit documentationUpdated(ns);
         }
+        m_initialReindexingNeeded = true;
         m_helpEngine->setupData();
     }
     m_recentQchUpdates.erase(it);
diff --git a/tools/assistant/tools/assistant/helpenginewrapper.h b/tools/assistant/tools/assistant/helpenginewrapper.h
index a30fab8..8d95273 100644
--- a/tools/assistant/tools/assistant/helpenginewrapper.h
+++ b/tools/assistant/tools/assistant/helpenginewrapper.h
@@ -101,6 +101,12 @@ public:
     const QStringList filterAttributes(const QString &filterName) const;
     QString	error() const;   
 
+    /*
+     * To be called after assistant has finished looking for new documentation.
+     * This will mainly cause the search index to be updated, if necessary.
+     */
+    void initialDocSetupDone();
+
     const QStringList qtDocInfo(const QString &component) const;
     void setQtDocInfo(const QString &component, const QStringList &doc);
 
diff --git a/tools/assistant/tools/assistant/helpviewer.cpp b/tools/assistant/tools/assistant/helpviewer.cpp
index 8e4d3ed..8597f6b 100644
--- a/tools/assistant/tools/assistant/helpviewer.cpp
+++ b/tools/assistant/tools/assistant/helpviewer.cpp
@@ -38,603 +38,31 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
-#include "tracer.h"
-
 #include "helpviewer.h"
-#include "centralwidget.h"
-#include "helpenginewrapper.h"
-
-#include <QtCore/QDir>
-#include <QtCore/QEvent>
-#include <QtCore/QVariant>
-#include <QtCore/QByteArray>
-#include <QtCore/QStringBuilder>
-#include <QtCore/QTemporaryFile>
-#include <QtCore/QTimer>
-
-#include <QtGui/QMenu>
-#include <QtGui/QKeyEvent>
-#include <QtGui/QClipboard>
-#include <QtGui/QApplication>
-#include <QtGui/QMessageBox>
-#include <QtGui/QDesktopServices>
+#include "tracer.h"
 
-#include <QNetworkAccessManager>
-#include <QNetworkReply>
-#include <QNetworkRequest>
+#include <QtCore/QCoreApplication>
+#include <QtCore/QUrl>
 
 QT_BEGIN_NAMESPACE
 
-namespace {
-    const QString PageNotFoundMessage =
-        QCoreApplication::translate("HelpViewer",
-            "<title>Error 404...</title><div align=\"center\"><br><br>"
-            "<h1>The page could not be found</h1><br><h3>'%1'</h3></div>");
-}
-
-#if !defined(QT_NO_WEBKIT)
-
-class HelpNetworkReply : public QNetworkReply
-{
-public:
-    HelpNetworkReply(const QNetworkRequest &request, const QByteArray &fileData,
-        const QString &mimeType);
-
-    virtual void abort();
-
-    virtual qint64 bytesAvailable() const
-        { return data.length() + QNetworkReply::bytesAvailable(); }
-
-protected:
-    virtual qint64 readData(char *data, qint64 maxlen);
-
-private:
-    QByteArray data;
-    qint64 origLen;
-};
-
-HelpNetworkReply::HelpNetworkReply(const QNetworkRequest &request,
-        const QByteArray &fileData, const QString& mimeType)
-    : data(fileData), origLen(fileData.length())
-{
-    TRACE_OBJ
-    setRequest(request);
-    setOpenMode(QIODevice::ReadOnly);
-
-    setHeader(QNetworkRequest::ContentTypeHeader, mimeType);
-    setHeader(QNetworkRequest::ContentLengthHeader, QByteArray::number(origLen));
-    QTimer::singleShot(0, this, SIGNAL(metaDataChanged()));
-    QTimer::singleShot(0, this, SIGNAL(readyRead()));
-}
-
-void HelpNetworkReply::abort()
-{
-    TRACE_OBJ
-    // nothing to do
-}
-
-qint64 HelpNetworkReply::readData(char *buffer, qint64 maxlen)
-{
-    TRACE_OBJ
-    qint64 len = qMin(qint64(data.length()), maxlen);
-    if (len) {
-        qMemCopy(buffer, data.constData(), len);
-        data.remove(0, len);
-    }
-    if (!data.length())
-        QTimer::singleShot(0, this, SIGNAL(finished()));
-    return len;
-}
-
-class HelpNetworkAccessManager : public QNetworkAccessManager
-{
-public:
-    HelpNetworkAccessManager(QObject *parent);
-
-protected:
-    virtual QNetworkReply *createRequest(Operation op,
-        const QNetworkRequest &request, QIODevice *outgoingData = 0);
-};
-
-HelpNetworkAccessManager::HelpNetworkAccessManager(QObject *parent)
-    : QNetworkAccessManager(parent)
-{
-    TRACE_OBJ
-}
-
-QNetworkReply *HelpNetworkAccessManager::createRequest(Operation /*op*/,
-    const QNetworkRequest &request, QIODevice* /*outgoingData*/)
-{
-    TRACE_OBJ
-    const QUrl& url = request.url();
-    QString mimeType = url.toString();
-    if (mimeType.endsWith(QLatin1String(".svg"))
-        || mimeType.endsWith(QLatin1String(".svgz"))) {
-            mimeType = QLatin1String("image/svg+xml");
-    } else if (mimeType.endsWith(QLatin1String(".css"))) {
-        mimeType = QLatin1String("text/css");
-    } else if (mimeType.endsWith(QLatin1String(".js"))) {
-        mimeType = QLatin1String("text/javascript");
-    } else if (mimeType.endsWith(QLatin1String(".txt"))) {
-        mimeType = QLatin1String("text/plain");
-    } else {
-        mimeType = QLatin1String("text/html");
-    }
-
-    HelpEngineWrapper &helpEngine = HelpEngineWrapper::instance();
-    const QByteArray &data = helpEngine.findFile(url).isValid()
-        ? helpEngine.fileData(url)
-        : PageNotFoundMessage.arg(url.toString()).toUtf8();
-    return new HelpNetworkReply(request, data, mimeType);
-}
-
-class HelpPage : public QWebPage
-{
-public:
-    HelpPage(CentralWidget *central, QObject *parent);
-
-protected:
-    virtual QWebPage *createWindow(QWebPage::WebWindowType);
-    virtual void triggerAction(WebAction action, bool checked = false);
-
-    virtual bool acceptNavigationRequest(QWebFrame *frame,
-        const QNetworkRequest &request, NavigationType type);
-
-private:
-    CentralWidget *centralWidget;
-    bool closeNewTabIfNeeded;
-
-    friend class HelpViewer;
-    Qt::MouseButtons m_pressedButtons;
-    Qt::KeyboardModifiers m_keyboardModifiers;
-};
-
-HelpPage::HelpPage(CentralWidget *central, QObject *parent)
-    : QWebPage(parent)
-    , centralWidget(central)
-    , closeNewTabIfNeeded(false)
-    , m_pressedButtons(Qt::NoButton)
-    , m_keyboardModifiers(Qt::NoModifier)
-{
-    TRACE_OBJ
-}
-
-QWebPage *HelpPage::createWindow(QWebPage::WebWindowType)
-{
-    TRACE_OBJ
-    HelpPage* newPage = static_cast<HelpPage*>(centralWidget->newEmptyTab()->page());
-    if (newPage)
-        newPage->closeNewTabIfNeeded = closeNewTabIfNeeded;
-    closeNewTabIfNeeded = false;
-    return newPage;
-}
+QString AbstractHelpViewer::PageNotFoundMessage =
+    QCoreApplication::translate("HelpViewer", "<title>Error 404...</title><div "
+    "align=\"center\"><br><br><h1>The page could not be found</h1><br><h3>'%1'"
+    "</h3></div>");
 
-void HelpPage::triggerAction(WebAction action, bool checked)
+AbstractHelpViewer::AbstractHelpViewer()
 {
-    TRACE_OBJ
-    switch (action) {
-        case OpenLinkInNewWindow:
-            closeNewTabIfNeeded = true;
-        default:        // fall through
-            QWebPage::triggerAction(action, checked);
-            break;
-    }
 }
 
-bool HelpPage::acceptNavigationRequest(QWebFrame *,
-    const QNetworkRequest &request, QWebPage::NavigationType type)
+AbstractHelpViewer::~AbstractHelpViewer()
 {
-    TRACE_OBJ
-    const QUrl &url = request.url();
-    const bool closeNewTab = closeNewTabIfNeeded;
-    closeNewTabIfNeeded = false;
-
-    if (HelpViewer::isLocalUrl(url)) {
-        const QString& path = url.path();
-        if (!HelpViewer::canOpenPage(path)) {
-            QTemporaryFile tmpTmpFile;
-            if (!tmpTmpFile.open())
-                return false;
-            const QString extension = QFileInfo(path).completeSuffix();
-            QFile actualTmpFile(tmpTmpFile.fileName() % QLatin1String(".")
-                                % extension);
-            if (actualTmpFile.open(QIODevice::ReadWrite | QIODevice::Truncate)) {
-                actualTmpFile.write(HelpEngineWrapper::instance().fileData(url));
-                actualTmpFile.close();
-                QDesktopServices::openUrl(QUrl(actualTmpFile.fileName()));
-            }
-
-            if (closeNewTab)
-                QMetaObject::invokeMethod(CentralWidget::instance(), "closeTab");
-            return false;
-        }
-
-        if (type == QWebPage::NavigationTypeLinkClicked
-            && (m_keyboardModifiers & Qt::ControlModifier
-            || m_pressedButtons == Qt::MidButton)) {
-                HelpViewer* viewer = centralWidget->newEmptyTab();
-                if (viewer)
-                    CentralWidget::instance()->setSource(url);
-                m_pressedButtons = Qt::NoButton;
-                m_keyboardModifiers = Qt::NoModifier;
-                return false;
-        }
-        return true;
-    }
-
-    QDesktopServices::openUrl(url);
-    return false;
 }
 
-HelpViewer::HelpViewer(CentralWidget *parent)
-    : QWebView(parent)
-    , parentWidget(parent)
-    , loadFinished(false)
-    , helpEngine(HelpEngineWrapper::instance())
+bool AbstractHelpViewer::isLocalUrl(const QUrl &url)
 {
     TRACE_OBJ
-    setAcceptDrops(false);
-
-    setPage(new HelpPage(parent, this));
-
-    page()->setNetworkAccessManager(new HelpNetworkAccessManager(this));
-
-    QAction* action = pageAction(QWebPage::OpenLinkInNewWindow);
-    action->setText(tr("Open Link in New Tab"));
-    if (!parent)
-        action->setVisible(false);
-
-    pageAction(QWebPage::DownloadLinkToDisk)->setVisible(false);
-    pageAction(QWebPage::DownloadImageToDisk)->setVisible(false);
-    pageAction(QWebPage::OpenImageInNewWindow)->setVisible(false);
-
-    connect(pageAction(QWebPage::Copy), SIGNAL(changed()), this,
-        SLOT(actionChanged()));
-    connect(pageAction(QWebPage::Back), SIGNAL(changed()), this,
-        SLOT(actionChanged()));
-    connect(pageAction(QWebPage::Forward), SIGNAL(changed()), this,
-        SLOT(actionChanged()));
-    connect(page(), SIGNAL(linkHovered(QString,QString,QString)), this,
-        SIGNAL(highlighted(QString)));
-    connect(this, SIGNAL(urlChanged(QUrl)), this, SIGNAL(sourceChanged(QUrl)));
-    connect(this, SIGNAL(loadFinished(bool)), this, SLOT(setLoadFinished(bool)));
-}
-
-void HelpViewer::setSource(const QUrl &url)
-{
-    TRACE_OBJ
-    loadFinished = false;
-    if (url.toString() == QLatin1String("help")) {
-        load(QUrl(QLatin1String("qthelp://com.trolltech.com."
-            "assistantinternal-1.0.0/assistant/assistant.html")));
-    } else {
-        load(url);
-    }
-}
-
-void HelpViewer::resetZoom()
-{
-    TRACE_OBJ
-    setTextSizeMultiplier(1.0);
-}
-
-void HelpViewer::zoomIn(qreal range)
-{
-    TRACE_OBJ
-    setTextSizeMultiplier(textSizeMultiplier() + range / 10.0);
-}
-
-void HelpViewer::zoomOut(qreal range)
-{
-    TRACE_OBJ
-    setTextSizeMultiplier(qMax(0.0, textSizeMultiplier() - range / 10.0));
-}
-
-void HelpViewer::wheelEvent(QWheelEvent *e)
-{
-    TRACE_OBJ
-    if (e->modifiers() & Qt::ControlModifier) {
-        const int delta = e->delta();
-        if (delta > 0)
-            zoomIn(delta / 120);
-        else if (delta < 0)
-            zoomOut(-delta / 120);
-        e->accept();
-        return;
-    }
-    QWebView::wheelEvent(e);
-}
-
-void HelpViewer::mouseReleaseEvent(QMouseEvent *e)
-{
-    TRACE_OBJ
-    if (e->button() == Qt::XButton1) {
-        triggerPageAction(QWebPage::Back);
-        return;
-    }
-
-    if (e->button() == Qt::XButton2) {
-        triggerPageAction(QWebPage::Forward);
-        return;
-    }
-
-    QWebView::mouseReleaseEvent(e);
-}
-
-void HelpViewer::actionChanged()
-{
-    TRACE_OBJ
-    QAction *a = qobject_cast<QAction *>(sender());
-    if (a == pageAction(QWebPage::Copy))
-        emit copyAvailable(a->isEnabled());
-    else if (a == pageAction(QWebPage::Back))
-        emit backwardAvailable(a->isEnabled());
-    else if (a == pageAction(QWebPage::Forward))
-        emit forwardAvailable(a->isEnabled());
-}
-
-void HelpViewer::mousePressEvent(QMouseEvent *event)
-{
-    TRACE_OBJ
-    HelpPage *currentPage = static_cast<HelpPage*>(page());
-    if (currentPage) {
-        currentPage->m_pressedButtons = event->buttons();
-        currentPage->m_keyboardModifiers = event->modifiers();
-    }
-    QWebView::mousePressEvent(event);
-}
-
-void HelpViewer::setLoadFinished(bool ok)
-{
-    TRACE_OBJ
-    loadFinished = ok;
-    emit sourceChanged(url());
-}
-
-#else  // !defined(QT_NO_WEBKIT)
-
-HelpViewer::HelpViewer(CentralWidget *parent)
-    : QTextBrowser(parent)
-    , zoomCount(0)
-    , controlPressed(false)
-    , lastAnchor(QString())
-    , parentWidget(parent)
-    , helpEngine(HelpEngineWrapper::instance())
-{
-    TRACE_OBJ
-   document()->setDocumentMargin(8);
-}
-
-void HelpViewer::setSource(const QUrl &url)
-{
-    TRACE_OBJ
-    bool help = url.toString() == QLatin1String("help");
-    if (url.isValid() && !help) {
-        if (launchedWithExternalApp(url))
-            return;
-
-        QUrl u = helpEngine.findFile(url);
-        if (u.isValid()) {
-            QTextBrowser::setSource(u);
-            return;
-        }
-    }
-
-    if (help) {
-        QTextBrowser::setSource(QUrl(QLatin1String("qthelp://com.trolltech.com."
-            "assistantinternal-1.0.0/assistant/assistant.html")));
-    } else {
-        QTextBrowser::setSource(url);
-        setHtml(PageNotFoundMessage.arg(url.toString()));
-        emit sourceChanged(url);
-    }
-}
-
-void HelpViewer::resetZoom()
-{
-    TRACE_OBJ
-    if (zoomCount == 0)
-        return;
-
-    QTextBrowser::zoomOut(zoomCount);
-    zoomCount = 0;
-}
-
-void HelpViewer::zoomIn(int range)
-{
-    TRACE_OBJ
-    if (zoomCount == 10)
-        return;
-
-    QTextBrowser::zoomIn(range);
-    zoomCount++;
-}
-
-void HelpViewer::zoomOut(int range)
-{
-    TRACE_OBJ
-    if (zoomCount == -5)
-        return;
-
-    QTextBrowser::zoomOut(range);
-    zoomCount--;
-}
-
-bool HelpViewer::launchedWithExternalApp(const QUrl &url)
-{
-    TRACE_OBJ
-    const bool canOpen = canOpenPage(url.path());
-    if (!isLocalUrl(url) || !canOpen) {
-        bool launched = false;
-        if (!canOpen && url.scheme() == QLatin1String("qthelp")) {
-            const QString& path = url.path();
-            const int lastDash = path.lastIndexOf(QChar('/'));
-            QString fileName = QDir::tempPath() + QDir::separator();
-            if (lastDash < 0)
-                fileName += path;
-            else
-                fileName += path.mid(lastDash + 1, path.length());
-
-            QFile tmpFile(QDir::cleanPath(fileName));
-            if (tmpFile.open(QIODevice::ReadWrite)) {
-                tmpFile.write(helpEngine.fileData(url));
-                tmpFile.close();
-            }
-            launched = QDesktopServices::openUrl(QUrl(tmpFile.fileName()));
-        } else {
-            launched = QDesktopServices::openUrl(url);
-        }
-
-        if (!launched) {
-            QMessageBox::information(this, tr("Help"),
-                tr("Unable to launch external application.\n"), tr("OK"));
-        }
-        return true;
-    }
-    return false;
-}
-
-QVariant HelpViewer::loadResource(int type, const QUrl &name)
-{
-    TRACE_OBJ
-    QByteArray ba;
-    if (type < 4) {
-        ba = helpEngine.fileData(name);
-        if (name.toString().endsWith(QLatin1String(".svg"), Qt::CaseInsensitive)) {
-            QImage image;
-            image.loadFromData(ba, "svg");
-            if (!image.isNull())
-                return image;
-        }
-    }
-    return ba;
-}
-
-void HelpViewer::openLinkInNewTab()
-{
-    TRACE_OBJ
-    if(lastAnchor.isEmpty())
-        return;
-
-    parentWidget->setSourceInNewTab(QUrl(lastAnchor));
-    lastAnchor.clear();
-}
-
-void HelpViewer::openLinkInNewTab(const QString &link)
-{
-    TRACE_OBJ
-    lastAnchor = link;
-    openLinkInNewTab();
-}
-
-bool HelpViewer::hasAnchorAt(const QPoint& pos)
-{
-    TRACE_OBJ
-    lastAnchor = anchorAt(pos);
-    if (lastAnchor.isEmpty())
-        return false;
-
-    lastAnchor = source().resolved(lastAnchor).toString();
-    if (lastAnchor.at(0) == QLatin1Char('#')) {
-        QString src = source().toString();
-        int hsh = src.indexOf(QLatin1Char('#'));
-        lastAnchor = (hsh>=0 ? src.left(hsh) : src) + lastAnchor;
-    }
-
-    return true;
-}
-
-void HelpViewer::contextMenuEvent(QContextMenuEvent *e)
-{
-    TRACE_OBJ
-    QMenu menu(QLatin1String(""), 0);
-
-    QUrl link;
-    QAction *copyAnchorAction = 0;
-    if (hasAnchorAt(e->pos())) {
-        link = anchorAt(e->pos());
-        if (link.isRelative())
-            link = source().resolved(link);
-        copyAnchorAction = menu.addAction(tr("Copy &Link Location"));
-        copyAnchorAction->setEnabled(!link.isEmpty() && link.isValid());
-
-        menu.addAction(tr("Open Link in New Tab\tCtrl+LMB"), this,
-            SLOT(openLinkInNewTab()));
-        menu.addSeparator();
-    }
-    menu.addActions(parentWidget->globalActions());
-    QAction *action = menu.exec(e->globalPos());
-    if (action == copyAnchorAction)
-        QApplication::clipboard()->setText(link.toString());
-}
-
-void HelpViewer::mouseReleaseEvent(QMouseEvent *e)
-{
-    TRACE_OBJ
-    if (e->button() == Qt::XButton1) {
-        QTextBrowser::backward();
-        return;
-    }
-
-    if (e->button() == Qt::XButton2) {
-        QTextBrowser::forward();
-        return;
-    }
-
-    controlPressed = e->modifiers() & Qt::ControlModifier;
-    if ((controlPressed && hasAnchorAt(e->pos())) ||
-        (e->button() == Qt::MidButton && hasAnchorAt(e->pos()))) {
-        openLinkInNewTab();
-        return;
-    }
-
-    QTextBrowser::mouseReleaseEvent(e);
-}
-
-void HelpViewer::keyPressEvent(QKeyEvent *e)
-{
-    TRACE_OBJ
-    if ((e->key() == Qt::Key_Home && e->modifiers() != Qt::NoModifier)
-        || (e->key() == Qt::Key_End && e->modifiers() != Qt::NoModifier)) {
-        QKeyEvent* event = new QKeyEvent(e->type(), e->key(), Qt::NoModifier,
-            e->text(), e->isAutoRepeat(), e->count());
-        e = event;
-    }
-    QTextBrowser::keyPressEvent(e);
-}
-
-void HelpViewer::wheelEvent(QWheelEvent *e)
-{
-    TRACE_OBJ
-    if (e->modifiers() == Qt::CTRL) {
-        e->accept();
-        (e->delta() > 0) ? zoomIn() : zoomOut();
-    } else {
-        e->ignore();
-        QTextBrowser::wheelEvent(e);
-    }
-}
-
-#endif  // !defined(QT_NO_WEBKIT)
-
-void HelpViewer::home()
-{
-    TRACE_OBJ
-    setSource(helpEngine.homePage());
-}
-
-bool HelpViewer::canOpenPage(const QString &url)
-{
-    TRACE_OBJ
-    return url.endsWith(QLatin1String(".html"), Qt::CaseInsensitive)
-        || url.endsWith(QLatin1String(".htm"), Qt::CaseInsensitive)
-        || url == QLatin1String("blank");
-}
-
-bool HelpViewer::isLocalUrl(const QUrl &url)
-{
-    TRACE_OBJ
-    const QString scheme = url.scheme();
+    const QString &scheme = url.scheme();
     return scheme.isEmpty()
         || scheme == QLatin1String("file")
         || scheme == QLatin1String("qrc")
@@ -643,5 +71,12 @@ bool HelpViewer::isLocalUrl(const QUrl &url)
         || scheme == QLatin1String("about");
 }
 
+bool AbstractHelpViewer::canOpenPage(const QString &url)
+{
+    TRACE_OBJ
+    return url.endsWith(QLatin1String(".html"), Qt::CaseInsensitive)
+        || url.endsWith(QLatin1String(".htm"), Qt::CaseInsensitive)
+        || url == QLatin1String("blank");
+}
 
 QT_END_NAMESPACE
diff --git a/tools/assistant/tools/assistant/helpviewer.h b/tools/assistant/tools/assistant/helpviewer.h
index 4dd8064..fe860fd 100644
--- a/tools/assistant/tools/assistant/helpviewer.h
+++ b/tools/assistant/tools/assistant/helpviewer.h
@@ -38,144 +38,37 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
-
 #ifndef HELPVIEWER_H
 #define HELPVIEWER_H
 
-#include <QtCore/QUrl>
-#include <QtCore/QVariant>
-#include <QtGui/QTextBrowser>
-#include <QtGui/QAction>
+#include <QtCore/QString>
 
-#if !defined(QT_NO_WEBKIT)
-#include <QWebView>
-#endif
+#include <QtGui/QFont>
 
 QT_BEGIN_NAMESPACE
 
-class CentralWidget;
-class HelpEngineWrapper;
-
-class QPoint;
-class QString;
-class QKeyEvent;
-class QMouseEvent;
-class QContextMenuEvent;
+class QUrl;
 
-#if !defined(QT_NO_WEBKIT)
-
-class HelpViewer : public QWebView
+class AbstractHelpViewer
 {
-    Q_OBJECT
-
 public:
-    HelpViewer(CentralWidget *parent);
-    void setSource(const QUrl &url);
-
-    inline QUrl source() const
-    { return url(); }
-
-    inline QString documentTitle() const
-    { return title(); }
-
-    inline bool hasSelection() const
-    { return !selectedText().isEmpty(); } // ### this is suboptimal
-
-    void resetZoom();
-    void zoomIn(qreal range = 1);
-    void zoomOut(qreal range = 1);
+    AbstractHelpViewer();
+    ~AbstractHelpViewer();
 
-    inline void copy()
-    { return triggerPageAction(QWebPage::Copy); }
+    virtual QFont viewerFont() const = 0;
+    virtual void setViewerFont(const QFont &font) = 0;
 
-    inline bool isForwardAvailable() const
-    { return pageAction(QWebPage::Forward)->isEnabled(); }
-    inline bool isBackwardAvailable() const
-    { return pageAction(QWebPage::Back)->isEnabled(); }
-    inline bool hasLoadFinished() const
-    { return loadFinished; }
-    inline qreal zoom() const
-    { return textSizeMultiplier(); }
+    virtual void scaleUp() = 0;
+    virtual void scaleDown() = 0;
+    
+    virtual void resetScale() = 0;
+    virtual qreal scale() const = 0;
 
-    static bool canOpenPage(const QString &url);
+    static QString PageNotFoundMessage;
     static bool isLocalUrl(const QUrl &url);
-
-public Q_SLOTS:
-    void home();
-    void backward() { back(); }
-
-Q_SIGNALS:
-    void copyAvailable(bool enabled);
-    void forwardAvailable(bool enabled);
-    void backwardAvailable(bool enabled);
-    void highlighted(const QString &);
-    void sourceChanged(const QUrl &);
-
-protected:
-    virtual void wheelEvent(QWheelEvent *);
-    void mouseReleaseEvent(QMouseEvent *e);
-    void mousePressEvent(QMouseEvent *event);
-
-private Q_SLOTS:
-    void actionChanged();
-    void setLoadFinished(bool ok);
-
-private:
-    CentralWidget* parentWidget;
-    bool loadFinished;
-    HelpEngineWrapper &helpEngine;
-};
-
-#else
-
-class HelpViewer : public QTextBrowser
-{
-    Q_OBJECT
-
-public:
-    HelpViewer(CentralWidget *parent);
-    void setSource(const QUrl &url);
-
-    void resetZoom();
-    void zoomIn(int range = 1);
-    void zoomOut(int range = 1);
-    int zoom() const { return zoomCount; }
-    void setZoom(int zoom) { zoomCount = zoom; }
-
-    inline bool hasSelection() const
-    { return textCursor().hasSelection(); }
-
-    bool launchedWithExternalApp(const QUrl &url);
     static bool canOpenPage(const QString &url);
-    static bool isLocalUrl(const QUrl &url);
-
-public Q_SLOTS:
-    void home();
-
-protected:
-    void wheelEvent(QWheelEvent *e);
-
-private:
-    QVariant loadResource(int type, const QUrl &name);    
-    void openLinkInNewTab(const QString &link);
-    bool hasAnchorAt(const QPoint& pos);
-    void contextMenuEvent(QContextMenuEvent *e);
-    void mouseReleaseEvent(QMouseEvent *e);
-    void keyPressEvent(QKeyEvent *e);
-
-private slots:
-    void openLinkInNewTab();
-
-private:
-    int zoomCount;
-    bool controlPressed;
-    QString lastAnchor;
-    CentralWidget* parentWidget;
-    HelpEngineWrapper &helpEngine;
 };
 
-#endif
-
 QT_END_NAMESPACE
 
-#endif
+#endif  // HELPVIEWER_H
diff --git a/tools/assistant/tools/assistant/helpviewer_qtb.cpp b/tools/assistant/tools/assistant/helpviewer_qtb.cpp
new file mode 100644
index 0000000..3aafe67
--- /dev/null
+++ b/tools/assistant/tools/assistant/helpviewer_qtb.cpp
@@ -0,0 +1,331 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Assistant 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#if defined(QT_NO_WEBKIT)
+
+#include "helpviewer_qtb.h"
+#include "helpviewer_qwv.h"
+
+#include "centralwidget.h"
+#include "helpenginewrapper.h"
+#include "tracer.h"
+
+#include <QtCore/QDir>
+#include <QtCore/QStringBuilder>
+
+#include <QtGui/QContextMenuEvent>
+#include <QtGui/QMenu>
+#include <QtGui/QClipboard>
+#include <QtGui/QApplication>
+#include <QtGui/QMessageBox>
+#include <QtGui/QDesktopServices>
+
+QT_BEGIN_NAMESPACE
+
+HelpViewer::HelpViewer(CentralWidget *parent, qreal zoom)
+    : QTextBrowser(parent)
+    , zoomCount(zoom)
+    , controlPressed(false)
+    , lastAnchor(QString())
+    , parentWidget(parent)
+    , helpEngine(HelpEngineWrapper::instance())
+    , forceFont(false)
+{
+    TRACE_OBJ
+    installEventFilter(this);
+    document()->setDocumentMargin(8);
+
+    QFont font = viewerFont();
+    font.setPointSize(int(font.pointSize() + zoom));
+    setViewerFont(font);
+}
+
+HelpViewer::~HelpViewer()
+{
+    TRACE_OBJ
+}
+
+QFont HelpViewer::viewerFont() const
+{
+    TRACE_OBJ
+    if (HelpEngineWrapper::instance().usesBrowserFont())
+        return helpEngine.browserFont();
+    return qApp->font();
+}
+
+void HelpViewer::setViewerFont(const QFont &newFont)
+{
+    TRACE_OBJ
+    if (font() != newFont) {
+        forceFont = true;
+        setFont(newFont);
+        forceFont = false;
+    }
+}
+
+void HelpViewer::scaleUp()
+{
+    TRACE_OBJ
+    if (zoomCount < 10) {
+        ++zoomCount;
+        forceFont = true;
+        zoomIn();
+        forceFont = false;
+    }
+}
+
+void HelpViewer::scaleDown()
+{
+    TRACE_OBJ
+    if (zoomCount > -5) {
+        --zoomCount;
+        forceFont = true;
+        zoomOut();
+        forceFont = false;
+    }
+}
+
+void HelpViewer::resetScale()
+{
+    TRACE_OBJ
+    if (zoomCount != 0) {
+        forceFont = true;
+        zoomOut(zoomCount);
+        forceFont = false;
+    }
+    zoomCount = 0;
+}
+
+void HelpViewer::setSource(const QUrl &url)
+{
+    TRACE_OBJ
+    bool help = url.toString() == QLatin1String("help");
+    if (url.isValid() && !help) {
+        if (launchedWithExternalApp(url))
+            return;
+
+        QUrl u = helpEngine.findFile(url);
+        if (u.isValid()) {
+            QTextBrowser::setSource(u);
+            return;
+        }
+    }
+
+    if (help) {
+        QTextBrowser::setSource(QUrl(QLatin1String("qthelp://com.trolltech.com."
+            "assistantinternal-1.0.0/assistant/assistant.html")));
+    } else {
+        QTextBrowser::setSource(url);
+        setHtml(PageNotFoundMessage.arg(url.toString()));
+        emit sourceChanged(url);
+    }
+}
+
+bool HelpViewer::launchedWithExternalApp(const QUrl &url)
+{
+    TRACE_OBJ
+    const bool canOpen = canOpenPage(url.path());
+    if (!isLocalUrl(url) || !canOpen) {
+        bool launched = false;
+        if (!canOpen && url.scheme() == QLatin1String("qthelp")) {
+            const QString& path = url.path();
+            const int lastDash = path.lastIndexOf(QChar('/'));
+            QString fileName = QDir::tempPath() + QDir::separator();
+            if (lastDash < 0)
+                fileName += path;
+            else
+                fileName += path.mid(lastDash + 1, path.length());
+
+            QFile tmpFile(QDir::cleanPath(fileName));
+            if (tmpFile.open(QIODevice::ReadWrite)) {
+                tmpFile.write(helpEngine.fileData(url));
+                tmpFile.close();
+            }
+            launched = QDesktopServices::openUrl(QUrl(tmpFile.fileName()));
+        } else {
+            launched = QDesktopServices::openUrl(url);
+        }
+
+        if (!launched) {
+            QMessageBox::information(this, tr("Help"),
+                tr("Unable to launch external application.\n"), tr("OK"));
+        }
+        return true;
+    }
+    return false;
+}
+
+QVariant HelpViewer::loadResource(int type, const QUrl &name)
+{
+    TRACE_OBJ
+    QByteArray ba;
+    if (type < 4) {
+        ba = helpEngine.fileData(name);
+        if (name.toString().endsWith(QLatin1String(".svg"), Qt::CaseInsensitive)) {
+            QImage image;
+            image.loadFromData(ba, "svg");
+            if (!image.isNull())
+                return image;
+        }
+    }
+    return ba;
+}
+
+void HelpViewer::openLinkInNewTab()
+{
+    TRACE_OBJ
+    if(lastAnchor.isEmpty())
+        return;
+
+    parentWidget->setSourceInNewTab(QUrl(lastAnchor));
+    lastAnchor.clear();
+}
+
+void HelpViewer::openLinkInNewTab(const QString &link)
+{
+    TRACE_OBJ
+    lastAnchor = link;
+    openLinkInNewTab();
+}
+
+bool HelpViewer::hasAnchorAt(const QPoint& pos)
+{
+    TRACE_OBJ
+    lastAnchor = anchorAt(pos);
+    if (lastAnchor.isEmpty())
+        return false;
+
+    lastAnchor = source().resolved(lastAnchor).toString();
+    if (lastAnchor.at(0) == QLatin1Char('#')) {
+        QString src = source().toString();
+        int hsh = src.indexOf(QLatin1Char('#'));
+        lastAnchor = (hsh>=0 ? src.left(hsh) : src) + lastAnchor;
+    }
+
+    return true;
+}
+
+void HelpViewer::contextMenuEvent(QContextMenuEvent *e)
+{
+    TRACE_OBJ
+    QMenu menu(QLatin1String(""), 0);
+
+    QUrl link;
+    QAction *copyAnchorAction = 0;
+    if (hasAnchorAt(e->pos())) {
+        link = anchorAt(e->pos());
+        if (link.isRelative())
+            link = source().resolved(link);
+        copyAnchorAction = menu.addAction(tr("Copy &Link Location"));
+        copyAnchorAction->setEnabled(!link.isEmpty() && link.isValid());
+
+        menu.addAction(tr("Open Link in New Tab\tCtrl+LMB"), this,
+            SLOT(openLinkInNewTab()));
+        menu.addSeparator();
+    }
+    menu.addActions(parentWidget->globalActions());
+    QAction *action = menu.exec(e->globalPos());
+    if (action == copyAnchorAction)
+        QApplication::clipboard()->setText(link.toString());
+}
+
+void HelpViewer::mouseReleaseEvent(QMouseEvent *e)
+{
+    TRACE_OBJ
+    if (e->button() == Qt::XButton1) {
+        QTextBrowser::backward();
+        return;
+    }
+
+    if (e->button() == Qt::XButton2) {
+        QTextBrowser::forward();
+        return;
+    }
+
+    controlPressed = e->modifiers() & Qt::ControlModifier;
+    if ((controlPressed && hasAnchorAt(e->pos())) ||
+        (e->button() == Qt::MidButton && hasAnchorAt(e->pos()))) {
+        openLinkInNewTab();
+        return;
+    }
+
+    QTextBrowser::mouseReleaseEvent(e);
+}
+
+void HelpViewer::keyPressEvent(QKeyEvent *e)
+{
+    TRACE_OBJ
+    if ((e->key() == Qt::Key_Home && e->modifiers() != Qt::NoModifier)
+        || (e->key() == Qt::Key_End && e->modifiers() != Qt::NoModifier)) {
+        QKeyEvent* event = new QKeyEvent(e->type(), e->key(), Qt::NoModifier,
+            e->text(), e->isAutoRepeat(), e->count());
+        e = event;
+    }
+    QTextBrowser::keyPressEvent(e);
+}
+
+void HelpViewer::home()
+{
+    TRACE_OBJ
+    setSource(helpEngine.homePage());
+}
+
+void HelpViewer::wheelEvent(QWheelEvent *e)
+{
+    TRACE_OBJ
+    if (e->modifiers() == Qt::ControlModifier) {
+        e->accept();
+        e->delta() > 0 ? scaleUp() : scaleDown();
+    } else {
+        QTextBrowser::wheelEvent(e);
+    }
+}
+
+bool HelpViewer::eventFilter(QObject *obj, QEvent *event)
+{
+    TRACE_OBJ
+    if (event->type() == QEvent::FontChange && !forceFont)
+        return true;
+    return QTextBrowser::eventFilter(obj, event);
+}
+
+QT_END_NAMESPACE
+
+#endif  // QT_NO_WEBKIT
diff --git a/tools/assistant/tools/assistant/helpviewer_qtb.h b/tools/assistant/tools/assistant/helpviewer_qtb.h
new file mode 100644
index 0000000..e927b34
--- /dev/null
+++ b/tools/assistant/tools/assistant/helpviewer_qtb.h
@@ -0,0 +1,116 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Assistant 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#if defined(QT_NO_WEBKIT)
+
+#ifndef HELPVIEWERQTB_H
+#define HELPVIEWERQTB_H
+
+#include "helpviewer.h"
+
+#include <QtCore/QUrl>
+#include <QtCore/QVariant>
+
+#include <QtGui/QTextBrowser>
+
+QT_BEGIN_NAMESPACE
+
+class CentralWidget;
+class HelpEngineWrapper;
+class QContextMenuEvent;
+class QKeyEvent;
+class QMouseEvent;
+
+class HelpViewer : public QTextBrowser, public AbstractHelpViewer
+{
+    Q_OBJECT
+
+public:
+    HelpViewer(CentralWidget *parent, qreal zoom = 0.0);
+    ~HelpViewer();
+
+    QFont viewerFont() const;
+    void setViewerFont(const QFont &font);
+
+    void scaleUp();
+    void scaleDown();
+    void resetScale();
+    qreal scale() const { return zoomCount; }
+
+    void setSource(const QUrl &url);
+
+    inline bool hasSelection() const
+    { return textCursor().hasSelection(); }
+
+    bool launchedWithExternalApp(const QUrl &url);
+
+public Q_SLOTS:
+    void home();
+
+protected:
+    void wheelEvent(QWheelEvent *e);
+    bool eventFilter(QObject *obj, QEvent *event);
+
+private:
+    QVariant loadResource(int type, const QUrl &name);
+    void openLinkInNewTab(const QString &link);
+    bool hasAnchorAt(const QPoint& pos);
+    void contextMenuEvent(QContextMenuEvent *e);
+    void mouseReleaseEvent(QMouseEvent *e);
+    void keyPressEvent(QKeyEvent *e);
+
+private slots:
+    void openLinkInNewTab();
+
+private:
+    int zoomCount;
+    bool controlPressed;
+    QString lastAnchor;
+    CentralWidget* parentWidget;
+    HelpEngineWrapper &helpEngine;
+
+    bool forceFont;
+};
+
+QT_END_NAMESPACE
+
+#endif  // HELPVIEWERQTB_H
+
+#endif  // QT_NO_WEBKIT
diff --git a/tools/assistant/tools/assistant/helpviewer_qwv.cpp b/tools/assistant/tools/assistant/helpviewer_qwv.cpp
new file mode 100644
index 0000000..4857e00
--- /dev/null
+++ b/tools/assistant/tools/assistant/helpviewer_qwv.cpp
@@ -0,0 +1,413 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Assistant 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#if !defined(QT_NO_WEBKIT)
+
+#include "helpviewer_qwv.h"
+
+#include "centralwidget.h"
+#include "helpenginewrapper.h"
+#include "tracer.h"
+
+#include <QtCore/QFileInfo>
+#include <QtCore/QString>
+#include <QtCore/QStringBuilder>
+#include <QtCore/QTemporaryFile>
+#include <QtCore/QTimer>
+
+#include <QtGui/QDesktopServices>
+#include <QtGui/QWheelEvent>
+
+#include <QtNetwork/QNetworkAccessManager>
+#include <QtNetwork/QNetworkReply>
+#include <QtNetwork/QNetworkRequest>
+
+QT_BEGIN_NAMESPACE
+
+class HelpNetworkReply : public QNetworkReply
+{
+public:
+    HelpNetworkReply(const QNetworkRequest &request, const QByteArray &fileData,
+        const QString &mimeType);
+
+    virtual void abort();
+
+    virtual qint64 bytesAvailable() const
+        { return data.length() + QNetworkReply::bytesAvailable(); }
+
+protected:
+    virtual qint64 readData(char *data, qint64 maxlen);
+
+private:
+    QByteArray data;
+    qint64 origLen;
+};
+
+HelpNetworkReply::HelpNetworkReply(const QNetworkRequest &request,
+        const QByteArray &fileData, const QString& mimeType)
+    : data(fileData), origLen(fileData.length())
+{
+    TRACE_OBJ
+    setRequest(request);
+    setOpenMode(QIODevice::ReadOnly);
+
+    setHeader(QNetworkRequest::ContentTypeHeader, mimeType);
+    setHeader(QNetworkRequest::ContentLengthHeader, QByteArray::number(origLen));
+    QTimer::singleShot(0, this, SIGNAL(metaDataChanged()));
+    QTimer::singleShot(0, this, SIGNAL(readyRead()));
+}
+
+void HelpNetworkReply::abort()
+{
+    TRACE_OBJ
+}
+
+qint64 HelpNetworkReply::readData(char *buffer, qint64 maxlen)
+{
+    TRACE_OBJ
+    qint64 len = qMin(qint64(data.length()), maxlen);
+    if (len) {
+        qMemCopy(buffer, data.constData(), len);
+        data.remove(0, len);
+    }
+    if (!data.length())
+        QTimer::singleShot(0, this, SIGNAL(finished()));
+    return len;
+}
+
+class HelpNetworkAccessManager : public QNetworkAccessManager
+{
+public:
+    HelpNetworkAccessManager(QObject *parent);
+
+protected:
+    virtual QNetworkReply *createRequest(Operation op,
+        const QNetworkRequest &request, QIODevice *outgoingData = 0);
+};
+
+HelpNetworkAccessManager::HelpNetworkAccessManager(QObject *parent)
+    : QNetworkAccessManager(parent)
+{
+    TRACE_OBJ
+}
+
+QNetworkReply *HelpNetworkAccessManager::createRequest(Operation /*op*/,
+    const QNetworkRequest &request, QIODevice* /*outgoingData*/)
+{
+    TRACE_OBJ
+    const QUrl& url = request.url();
+    QString mimeType = url.toString();
+    if (mimeType.endsWith(QLatin1String(".svg"))
+        || mimeType.endsWith(QLatin1String(".svgz"))) {
+            mimeType = QLatin1String("image/svg+xml");
+    } else if (mimeType.endsWith(QLatin1String(".css"))) {
+        mimeType = QLatin1String("text/css");
+    } else if (mimeType.endsWith(QLatin1String(".js"))) {
+        mimeType = QLatin1String("text/javascript");
+    } else if (mimeType.endsWith(QLatin1String(".txt"))) {
+        mimeType = QLatin1String("text/plain");
+    } else {
+        mimeType = QLatin1String("text/html");
+    }
+
+    HelpEngineWrapper &helpEngine = HelpEngineWrapper::instance();
+    const QByteArray &data = helpEngine.findFile(url).isValid()
+        ? helpEngine.fileData(url)
+        : AbstractHelpViewer::PageNotFoundMessage.arg(url.toString()).toUtf8();
+    return new HelpNetworkReply(request, data, mimeType);
+}
+
+class HelpPage : public QWebPage
+{
+public:
+    HelpPage(CentralWidget *central, QObject *parent);
+
+protected:
+    virtual QWebPage *createWindow(QWebPage::WebWindowType);
+    virtual void triggerAction(WebAction action, bool checked = false);
+
+    virtual bool acceptNavigationRequest(QWebFrame *frame,
+        const QNetworkRequest &request, NavigationType type);
+
+private:
+    CentralWidget *centralWidget;
+    bool closeNewTabIfNeeded;
+
+    friend class HelpViewer;
+    Qt::MouseButtons m_pressedButtons;
+    Qt::KeyboardModifiers m_keyboardModifiers;
+};
+
+HelpPage::HelpPage(CentralWidget *central, QObject *parent)
+    : QWebPage(parent)
+    , centralWidget(central)
+    , closeNewTabIfNeeded(false)
+    , m_pressedButtons(Qt::NoButton)
+    , m_keyboardModifiers(Qt::NoModifier)
+{
+    TRACE_OBJ
+}
+
+QWebPage *HelpPage::createWindow(QWebPage::WebWindowType)
+{
+    TRACE_OBJ
+    HelpPage* newPage = static_cast<HelpPage*>(centralWidget->newEmptyTab()->page());
+    if (newPage)
+        newPage->closeNewTabIfNeeded = closeNewTabIfNeeded;
+    closeNewTabIfNeeded = false;
+    return newPage;
+}
+
+void HelpPage::triggerAction(WebAction action, bool checked)
+{
+    TRACE_OBJ
+    switch (action) {
+        case OpenLinkInNewWindow:
+            closeNewTabIfNeeded = true;
+        default:        // fall through
+            QWebPage::triggerAction(action, checked);
+            break;
+    }
+}
+
+bool HelpPage::acceptNavigationRequest(QWebFrame *,
+    const QNetworkRequest &request, QWebPage::NavigationType type)
+{
+    TRACE_OBJ
+    const QUrl &url = request.url();
+    const bool closeNewTab = closeNewTabIfNeeded;
+    closeNewTabIfNeeded = false;
+
+    if (AbstractHelpViewer::isLocalUrl(url)) {
+        const QString& path = url.path();
+        if (!AbstractHelpViewer::canOpenPage(path)) {
+            QTemporaryFile tmpTmpFile;
+            if (!tmpTmpFile.open())
+                return false;
+            const QString &extension = QFileInfo(path).completeSuffix();
+            QFile actualTmpFile(tmpTmpFile.fileName() % QLatin1String(".")
+                % extension);
+            if (actualTmpFile.open(QIODevice::ReadWrite | QIODevice::Truncate)) {
+                actualTmpFile.write(HelpEngineWrapper::instance().fileData(url));
+                actualTmpFile.close();
+                QDesktopServices::openUrl(QUrl(actualTmpFile.fileName()));
+            }
+
+            if (closeNewTab)
+                QMetaObject::invokeMethod(CentralWidget::instance(), "closeTab");
+            return false;
+        }
+
+        if (type == QWebPage::NavigationTypeLinkClicked
+            && (m_keyboardModifiers & Qt::ControlModifier
+            || m_pressedButtons == Qt::MidButton)) {
+                HelpViewer* viewer = centralWidget->newEmptyTab();
+                if (viewer)
+                    CentralWidget::instance()->setSource(url);
+                m_pressedButtons = Qt::NoButton;
+                m_keyboardModifiers = Qt::NoModifier;
+                return false;
+        }
+        return true;
+    }
+
+    QDesktopServices::openUrl(url);
+    return false;
+}
+
+// -- HelpViewer
+
+HelpViewer::HelpViewer(CentralWidget *parent, qreal zoom)
+    : QWebView(parent)
+    , parentWidget(parent)
+    , loadFinished(false)
+    , helpEngine(HelpEngineWrapper::instance())
+{
+    TRACE_OBJ
+    setAcceptDrops(false);
+
+    setPage(new HelpPage(parent, this));
+
+    page()->setNetworkAccessManager(new HelpNetworkAccessManager(this));
+
+    QAction* action = pageAction(QWebPage::OpenLinkInNewWindow);
+    action->setText(tr("Open Link in New Tab"));
+    if (!parent)
+        action->setVisible(false);
+
+    pageAction(QWebPage::DownloadLinkToDisk)->setVisible(false);
+    pageAction(QWebPage::DownloadImageToDisk)->setVisible(false);
+    pageAction(QWebPage::OpenImageInNewWindow)->setVisible(false);
+
+    connect(pageAction(QWebPage::Copy), SIGNAL(changed()), this,
+        SLOT(actionChanged()));
+    connect(pageAction(QWebPage::Back), SIGNAL(changed()), this,
+        SLOT(actionChanged()));
+    connect(pageAction(QWebPage::Forward), SIGNAL(changed()), this,
+        SLOT(actionChanged()));
+    connect(page(), SIGNAL(linkHovered(QString,QString,QString)), this,
+        SIGNAL(highlighted(QString)));
+    connect(this, SIGNAL(urlChanged(QUrl)), this, SIGNAL(sourceChanged(QUrl)));
+    connect(this, SIGNAL(loadFinished(bool)), this, SLOT(setLoadFinished(bool)));
+
+    setFont(viewerFont());
+    setTextSizeMultiplier(zoom == 0.0 ? 1.0 : zoom);
+}
+
+HelpViewer::~HelpViewer()
+{
+    TRACE_OBJ
+}
+
+QFont HelpViewer::viewerFont() const
+{
+    TRACE_OBJ
+    if (helpEngine.usesBrowserFont())
+        return helpEngine.browserFont();
+
+    QWebSettings *webSettings = QWebSettings::globalSettings();
+    return QFont(webSettings->fontFamily(QWebSettings::StandardFont),
+        webSettings->fontSize(QWebSettings::DefaultFontSize));
+}
+
+void HelpViewer::setViewerFont(const QFont &font)
+{
+    TRACE_OBJ
+    QWebSettings *webSettings = settings();
+    webSettings->setFontFamily(QWebSettings::StandardFont, font.family());
+    webSettings->setFontSize(QWebSettings::DefaultFontSize, font.pointSize());
+}
+
+void HelpViewer::scaleUp()
+{
+    TRACE_OBJ
+    setTextSizeMultiplier(textSizeMultiplier() + 0.1);
+}
+
+void HelpViewer::scaleDown()
+{
+    TRACE_OBJ
+    setTextSizeMultiplier(qMax(0.0, textSizeMultiplier() - 0.1));
+}
+
+void HelpViewer::resetScale()
+{
+    TRACE_OBJ
+    setTextSizeMultiplier(1.0);
+}
+
+void HelpViewer::setSource(const QUrl &url)
+{
+    TRACE_OBJ
+    loadFinished = false;
+    if (url.toString() == QLatin1String("help")) {
+        load(QUrl(QLatin1String("qthelp://com.trolltech.com."
+            "assistantinternal-1.0.0/assistant/assistant.html")));
+    } else {
+        load(url);
+    }
+}
+
+void HelpViewer::home()
+{
+    TRACE_OBJ
+    setSource(helpEngine.homePage());
+}
+
+void HelpViewer::wheelEvent(QWheelEvent *e)
+{
+    TRACE_OBJ
+    if (e->modifiers()& Qt::ControlModifier) {
+        e->accept();
+        e->delta() > 0 ? scaleUp() : scaleDown();
+    } else {
+        QWebView::wheelEvent(e);
+    }
+}
+
+void HelpViewer::mouseReleaseEvent(QMouseEvent *e)
+{
+    TRACE_OBJ
+    if (e->button() == Qt::XButton1) {
+        triggerPageAction(QWebPage::Back);
+        return;
+    }
+
+    if (e->button() == Qt::XButton2) {
+        triggerPageAction(QWebPage::Forward);
+        return;
+    }
+
+    QWebView::mouseReleaseEvent(e);
+}
+
+void HelpViewer::actionChanged()
+{
+    TRACE_OBJ
+    QAction *a = qobject_cast<QAction *>(sender());
+    if (a == pageAction(QWebPage::Copy))
+        emit copyAvailable(a->isEnabled());
+    else if (a == pageAction(QWebPage::Back))
+        emit backwardAvailable(a->isEnabled());
+    else if (a == pageAction(QWebPage::Forward))
+        emit forwardAvailable(a->isEnabled());
+}
+
+void HelpViewer::mousePressEvent(QMouseEvent *event)
+{
+    TRACE_OBJ
+    HelpPage *currentPage = static_cast<HelpPage*>(page());
+    if (currentPage) {
+        currentPage->m_pressedButtons = event->buttons();
+        currentPage->m_keyboardModifiers = event->modifiers();
+    }
+    QWebView::mousePressEvent(event);
+}
+
+void HelpViewer::setLoadFinished(bool ok)
+{
+    TRACE_OBJ
+    loadFinished = ok;
+    emit sourceChanged(url());
+}
+
+QT_END_NAMESPACE
+
+#endif  // !QT_NO_WEBKIT
diff --git a/tools/assistant/tools/assistant/helpviewer_qwv.h b/tools/assistant/tools/assistant/helpviewer_qwv.h
new file mode 100644
index 0000000..3f2e537
--- /dev/null
+++ b/tools/assistant/tools/assistant/helpviewer_qwv.h
@@ -0,0 +1,122 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Assistant 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#if !defined(QT_NO_WEBKIT)
+
+#ifndef HELPVIEWERQWV_H
+#define HELPVIEWERQWV_H
+
+#include "helpviewer.h"
+
+#include <QtGui/QAction>
+#include <QtWebKit/QWebView>
+
+QT_BEGIN_NAMESPACE
+
+class CentralWidget;
+class HelpEngineWrapper;
+class QMouseEvent;
+
+class HelpViewer : public QWebView, public AbstractHelpViewer
+{
+    Q_OBJECT
+
+public:
+    HelpViewer(CentralWidget *parent, qreal zoom = 0.0);
+    ~HelpViewer();
+
+    QFont viewerFont() const;
+    void setViewerFont(const QFont &font);
+
+    void scaleUp();
+    void scaleDown();
+    void resetScale();
+    qreal scale() const { return textSizeMultiplier(); }
+
+    void setSource(const QUrl &url);
+    inline QUrl source() const { return url(); }
+
+    inline QString documentTitle() const
+    { return title(); }
+
+    inline bool hasSelection() const
+    { return !selectedText().isEmpty(); } // ### this is suboptimal
+
+    inline void copy()
+    { return triggerPageAction(QWebPage::Copy); }
+
+    inline bool isForwardAvailable() const
+    { return pageAction(QWebPage::Forward)->isEnabled(); }
+    inline bool isBackwardAvailable() const
+    { return pageAction(QWebPage::Back)->isEnabled(); }
+    inline bool hasLoadFinished() const
+    { return loadFinished; }
+
+public Q_SLOTS:
+    void home();
+    void backward() { back(); }
+
+Q_SIGNALS:
+    void copyAvailable(bool enabled);
+    void forwardAvailable(bool enabled);
+    void backwardAvailable(bool enabled);
+    void highlighted(const QString &);
+    void sourceChanged(const QUrl &);
+
+protected:
+    virtual void wheelEvent(QWheelEvent *);
+    void mouseReleaseEvent(QMouseEvent *e);
+    void mousePressEvent(QMouseEvent *event);
+
+private Q_SLOTS:
+    void actionChanged();
+    void setLoadFinished(bool ok);
+
+private:
+    CentralWidget* parentWidget;
+    bool loadFinished;
+    HelpEngineWrapper &helpEngine;
+};
+
+QT_END_NAMESPACE
+
+#endif  // HELPVIEWERQWV_H
+
+#endif  // !QT_NO_WEBKIT
diff --git a/tools/assistant/tools/assistant/indexwindow.cpp b/tools/assistant/tools/assistant/indexwindow.cpp
index 82242e5..63ddbe4 100644
--- a/tools/assistant/tools/assistant/indexwindow.cpp
+++ b/tools/assistant/tools/assistant/indexwindow.cpp
@@ -219,7 +219,7 @@ void IndexWindow::open(QHelpIndexWidget* indexWidget, const QModelIndex &index)
             return;
         }
 
-        if (!HelpViewer::canOpenPage(url.path()))
+        if (!AbstractHelpViewer::canOpenPage(url.path()))
             CentralWidget::instance()->setSource(url);
         else
             CentralWidget::instance()->setSourceInNewTab(url);
diff --git a/tools/assistant/tools/assistant/mainwindow.cpp b/tools/assistant/tools/assistant/mainwindow.cpp
index 2ff6b5e..8096218 100644
--- a/tools/assistant/tools/assistant/mainwindow.cpp
+++ b/tools/assistant/tools/assistant/mainwindow.cpp
@@ -44,7 +44,6 @@
 
 #include "bookmarkmanager.h"
 #include "centralwidget.h"
-#include "helpviewer.h"
 #include "indexwindow.h"
 #include "topicchooser.h"
 #include "contentwindow.h"
@@ -355,8 +354,6 @@ void MainWindow::lookForNewQtDocumentation()
 void MainWindow::qtDocumentationInstalled(bool newDocsInstalled)
 {
     TRACE_OBJ
-    if (newDocsInstalled)
-        HelpEngineWrapper::instance().setupData();
     statusBar()->clearMessage();
     checkInitState();
 }
@@ -384,6 +381,7 @@ void MainWindow::checkInitState()
         }
         emit initDone();
     }
+    HelpEngineWrapper::instance().initialDocSetupDone();
 }
 
 void MainWindow::insertLastPages()
@@ -760,12 +758,10 @@ void MainWindow::showPreferences()
 {
     TRACE_OBJ
     PreferencesDialog dia(this);
-
     connect(&dia, SIGNAL(updateApplicationFont()), this,
         SLOT(updateApplicationFont()));
     connect(&dia, SIGNAL(updateBrowserFont()), m_centralWidget,
         SLOT(updateBrowserFont()));
-
     dia.showDialog();
 }
 
@@ -970,7 +966,9 @@ void MainWindow::updateApplicationFont()
     if (helpEngine.usesAppFont())
         font = helpEngine.appFont();
 
-    qApp->setFont(font, "QWidget");
+    const QWidgetList &widgets = qApp->allWidgets();
+    foreach (QWidget* widget, widgets)
+        widget->setFont(font);
 }
 
 void MainWindow::setupFilterCombo()
diff --git a/tools/assistant/tools/assistant/preferencesdialog.cpp b/tools/assistant/tools/assistant/preferencesdialog.cpp
index f0ef054..0e1d719 100644
--- a/tools/assistant/tools/assistant/preferencesdialog.cpp
+++ b/tools/assistant/tools/assistant/preferencesdialog.cpp
@@ -38,26 +38,24 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
-#include "tracer.h"
-
 #include "preferencesdialog.h"
+
+#include "centralwidget.h"
 #include "filternamedialog.h"
-#include "installdialog.h"
 #include "fontpanel.h"
-#include "centralwidget.h"
-#include "aboutdialog.h"
 #include "helpenginewrapper.h"
+#include "installdialog.h"
+#include "tracer.h"
 
 #include <QtCore/QtAlgorithms>
 #include <QtCore/QFileSystemWatcher>
 
-#include <QtGui/QHeaderView>
+#include <QtGui/QDesktopWidget>
 #include <QtGui/QFileDialog>
-#include <QtGui/QMessageBox>
-#include <QtGui/QMenu>
 #include <QtGui/QFontDatabase>
-#include <QtGui/QApplication>
-#include <QtGui/QDesktopWidget>
+#include <QtGui/QHeaderView>
+#include <QtGui/QMenu>
+#include <QtGui/QMessageBox>
 
 #include <QtHelp/QHelpEngineCore>
 
@@ -115,6 +113,9 @@ PreferencesDialog::PreferencesDialog(QWidget *parent)
 
     updateFontSettingsPage();
     updateOptionsPage();
+
+    if (helpEngine.usesAppFont())
+        setFont(helpEngine.appFont());
 }
 
 PreferencesDialog::~PreferencesDialog()
@@ -124,16 +125,13 @@ PreferencesDialog::~PreferencesDialog()
         helpEngine.setAppFont(m_appFontPanel->selectedFont());
         helpEngine.setUseAppFont(m_appFontPanel->isChecked());
         helpEngine.setAppWritingSystem(m_appFontPanel->writingSystem());
+        emit updateApplicationFont();
     }
 
     if (m_browserFontChanged) {
         helpEngine.setBrowserFont(m_browserFontPanel->selectedFont());
         helpEngine.setUseBrowserFont(m_browserFontPanel->isChecked());
         helpEngine.setBrowserWritingSystem(m_browserFontPanel->writingSystem());
-    }
-
-    if (m_appFontChanged || m_browserFontChanged) {
-        emit updateApplicationFont();
         emit updateBrowserFont();
     }
 
diff --git a/tools/designer/src/components/formeditor/formeditor.pri b/tools/designer/src/components/formeditor/formeditor.pri
index bbe96d5..b1a9318 100644
--- a/tools/designer/src/components/formeditor/formeditor.pri
+++ b/tools/designer/src/components/formeditor/formeditor.pri
@@ -8,6 +8,7 @@ FORMS +=   $$PWD/deviceprofiledialog.ui \
            $$PWD/templateoptionspage.ui
 
 HEADERS += $$PWD/qdesigner_resource.h \
+           $$PWD/qdesignerundostack.h \
            $$PWD/formwindow.h \
            $$PWD/formwindow_widgetstack.h \
            $$PWD/formwindow_dnditem.h \
@@ -41,6 +42,7 @@ HEADERS += $$PWD/qdesigner_resource.h \
            $$PWD/templateoptionspage.h
 
 SOURCES += $$PWD/qdesigner_resource.cpp \
+           $$PWD/qdesignerundostack.cpp \
            $$PWD/formwindow.cpp \
            $$PWD/formwindow_widgetstack.cpp \
            $$PWD/formwindow_dnditem.cpp \
diff --git a/tools/designer/src/components/formeditor/formwindow.cpp b/tools/designer/src/components/formeditor/formwindow.cpp
index 3a7cd83..631ca7c 100644
--- a/tools/designer/src/components/formeditor/formwindow.cpp
+++ b/tools/designer/src/components/formeditor/formwindow.cpp
@@ -399,8 +399,7 @@ void FormWindow::setCursorToAll(const QCursor &c, QWidget *start)
 void FormWindow::init()
 {
     if (FormWindowManager *manager = qobject_cast<FormWindowManager*> (core()->formWindowManager())) {
-        m_commandHistory = new QUndoStack(this);
-        manager->undoGroup()->addStack(m_commandHistory);
+        manager->undoGroup()->addStack(m_undoStack.qundoStack());
     }
 
     m_blockSelectionChanged = false;
@@ -429,9 +428,8 @@ void FormWindow::init()
     m_mainContainer = 0;
     m_currentWidget = 0;
 
-    connect(m_commandHistory, SIGNAL(indexChanged(int)), this, SLOT(updateDirty()));
-    connect(m_commandHistory, SIGNAL(indexChanged(int)), this, SIGNAL(changed()));
-    connect(m_commandHistory, SIGNAL(indexChanged(int)), this, SLOT(checkSelection()));
+    connect(&m_undoStack, SIGNAL(changed()), this, SIGNAL(changed()));
+    connect(&m_undoStack, SIGNAL(changed()), this, SLOT(checkSelection()));
 
     core()->metaDataBase()->add(this);
 
@@ -1227,14 +1225,14 @@ void FormWindow::insertWidget(QWidget *w, const QRect &rect, QWidget *container,
     if (w->parentWidget() != container) {
         ReparentWidgetCommand *cmd = new ReparentWidgetCommand(this);
         cmd->init(w, container);
-        m_commandHistory->push(cmd);
+        m_undoStack.push(cmd);
     }
 
-    m_commandHistory->push(geom_cmd);
+    m_undoStack.push(geom_cmd);
 
     InsertWidgetCommand *cmd = new InsertWidgetCommand(this);
     cmd->init(w, already_in_form);
-    m_commandHistory->push(cmd);
+    m_undoStack.push(cmd);
 
     endCommand();
 
@@ -1277,12 +1275,10 @@ void FormWindow::resizeWidget(QWidget *widget, const QRect &geometry)
     Q_ASSERT(isDescendant(this, widget));
 
     QRect r = geometry;
-    if (m_lastIndex > m_commandHistory->index())
-        m_lastIndex = -1;
     SetPropertyCommand *cmd = new SetPropertyCommand(this);
     cmd->init(widget, QLatin1String("geometry"), r);
     cmd->setText(tr("Resize"));
-    m_commandHistory->push(cmd);
+    m_undoStack.push(cmd);
 }
 
 void FormWindow::raiseChildSelections(QWidget *w)
@@ -1428,26 +1424,117 @@ int FormWindow::calcValue(int val, bool forward, bool snap, int snapOffset) cons
     return (forward ? val + 1 : val - 1);
 }
 
-QRect FormWindow::applyValue(const QRect &rect, int val, int key, bool size) const
+// ArrowKeyOperation: Stores a keyboard move or resize (Shift pressed)
+// operation.
+struct ArrowKeyOperation {
+    ArrowKeyOperation() : resize(false), distance(0), arrowKey(Qt::Key_Left) {}
+
+    QRect apply(const QRect &in) const;
+
+    bool resize; // Resize: Shift-Key->drag bottom/right corner, else just move
+    int distance;
+    int arrowKey;
+};
+
+QRect ArrowKeyOperation::apply(const QRect &rect) const
 {
     QRect r = rect;
-    if (size) {
-        if (key == Qt::Key_Left || key == Qt::Key_Right)
-            r.setWidth(val);
+    if (resize) {
+        if (arrowKey == Qt::Key_Left || arrowKey == Qt::Key_Right)
+            r.setWidth(r.width() + distance);
         else
-            r.setHeight(val);
+            r.setHeight(r.height() + distance);
     } else {
-        if (key == Qt::Key_Left || key == Qt::Key_Right)
-            r.moveLeft(val);
+        if (arrowKey == Qt::Key_Left || arrowKey == Qt::Key_Right)
+            r.moveLeft(r.x() + distance);
         else
-            r.moveTop(val);
+            r.moveTop(r.y() + distance);
     }
     return r;
 }
 
+QDebug operator<<(QDebug in, const ArrowKeyOperation &op)
+{
+    in.nospace() << "Resize=" << op.resize << " dist=" << op.distance << " Key=" << op.arrowKey << ' ';
+    return in;
+}
+
+// ArrowKeyPropertyHelper: Applies a struct ArrowKeyOperation
+// (stored as new value) to a list of widgets using to calculate the
+// changed geometry of the widget in setValue(). Thus, the 'newValue'
+// of the property command is the relative move distance, which is the same
+// for all widgets (although resulting in different geometries for the widgets).
+// The command merging can then work as it would when applying the same text
+// to all QLabels.
+
+class ArrowKeyPropertyHelper : public PropertyHelper {
+public:
+    ArrowKeyPropertyHelper(QObject* o, SpecialProperty sp,
+                       QDesignerPropertySheetExtension *s, int i) :
+                       PropertyHelper(o, sp, s, i) {}
+
+    virtual Value setValue(QDesignerFormWindowInterface *fw, const QVariant &value, bool changed, unsigned subPropertyMask);
+};
+
+PropertyHelper::Value ArrowKeyPropertyHelper::setValue(QDesignerFormWindowInterface *fw, const QVariant &value, bool changed, unsigned subPropertyMask)
+{
+    // Apply operation to obtain the new geometry value.
+    QWidget *w = qobject_cast<QWidget*>(object());
+    const ArrowKeyOperation operation = qvariant_cast<ArrowKeyOperation>(value);
+    const QRect newGeom = operation.apply(w->geometry());
+    return PropertyHelper::setValue(fw, QVariant(newGeom), changed, subPropertyMask);
+}
+
+// ArrowKeyPropertyCommand: Helper factory overwritten to create
+// ArrowKeyPropertyHelper and a merge operation that merges values of
+// the same direction.
+class ArrowKeyPropertyCommand: public SetPropertyCommand {
+public:
+    explicit ArrowKeyPropertyCommand(QDesignerFormWindowInterface *fw,
+                                     QUndoCommand *p = 0);
+
+    void init(QWidgetList &l, const ArrowKeyOperation &op);
+
+protected:
+    virtual PropertyHelper *createPropertyHelper(QObject *o, SpecialProperty sp,
+                                                 QDesignerPropertySheetExtension *s, int i) const
+        { return new ArrowKeyPropertyHelper(o, sp, s, i); }
+    virtual QVariant mergeValue(const QVariant &newValue);
+};
+
+ArrowKeyPropertyCommand::ArrowKeyPropertyCommand(QDesignerFormWindowInterface *fw,
+                                                 QUndoCommand *p) :
+    SetPropertyCommand(fw, p)
+{
+    static const int mid = qRegisterMetaType<qdesigner_internal::ArrowKeyOperation>();
+    Q_UNUSED(mid)
+}
+
+void ArrowKeyPropertyCommand::init(QWidgetList &l, const ArrowKeyOperation &op)
+{
+    QObjectList ol;
+    foreach(QWidget *w, l)
+        ol.push_back(w);
+    SetPropertyCommand::init(ol, QLatin1String("geometry"), qVariantFromValue(op));
+
+    setText(op.resize ? FormWindow::tr("Key Resize") : FormWindow::tr("Key Move"));
+}
+
+QVariant ArrowKeyPropertyCommand::mergeValue(const QVariant &newMergeValue)
+{
+    // Merge move operations of the same arrow key
+    if (!qVariantCanConvert<ArrowKeyOperation>(newMergeValue))
+        return QVariant();
+    ArrowKeyOperation mergedOperation = qvariant_cast<ArrowKeyOperation>(newValue());
+    const ArrowKeyOperation newMergeOperation = qvariant_cast<ArrowKeyOperation>(newMergeValue);
+    if (mergedOperation.resize != newMergeOperation.resize || mergedOperation.arrowKey != newMergeOperation.arrowKey)
+        return QVariant();
+    mergedOperation.distance += newMergeOperation.distance;
+    return qVariantFromValue(mergedOperation);
+}
+
 void FormWindow::handleArrowKeyEvent(int key, Qt::KeyboardModifiers modifiers)
 {
-    bool startMacro = false;
     const QDesignerFormWindowCursorInterface *c = cursor();
     if (!c->hasSelection())
         return;
@@ -1480,57 +1567,14 @@ void FormWindow::handleArrowKeyEvent(int key, Qt::KeyboardModifiers modifiers)
 
     const int newValue = calcValue(oldValue, forward, snap, snapPoint);
 
-    const int offset = newValue - oldValue;
-
-    const int selCount = selection.count();
-    // check if selection is the same as last time
-    if (selCount != m_moveSelection.count() ||
-        m_lastUndoIndex != m_commandHistory->index()) {
-        m_moveSelection.clear();
-        startMacro = true;
-    } else {
-        for (int index = 0; index < selCount; ++index) {
-            if (m_moveSelection[index]->object() != selection.at(index)) {
-                m_moveSelection.clear();
-                startMacro = true;
-                break;
-            }
-        }
-    }
-
-    if (startMacro)
-        beginCommand(tr("Key Move"));
-
-    for (int index = 0; index < selCount; ++index) {
-        QWidget *w = selection.at(index);
-        const QRect oldGeom = w->geometry();
-        const QRect geom = applyValue(oldGeom, getValue(oldGeom, key, size) + offset, key, size);
-
-        SetPropertyCommand *cmd = 0;
-
-        if (m_moveSelection.count() > index)
-            cmd = m_moveSelection[index];
-
-        if (!cmd) {
-            cmd = new SetPropertyCommand(this);
-            cmd->init(w, QLatin1String("geometry"), geom);
-            cmd->setText(tr("Key Move"));
-            m_commandHistory->push(cmd);
+    ArrowKeyOperation operation;
+    operation.resize = modifiers & Qt::ShiftModifier;
+    operation.distance = newValue - oldValue;
+    operation.arrowKey = key;
 
-            if (m_moveSelection.count() > index)
-                m_moveSelection.replace(index, cmd);
-            else
-                m_moveSelection.append(cmd);
-        } else {
-            cmd->setNewValue(geom);
-            cmd->redo();
-        }
-    }
-
-    if (startMacro) {
-        endCommand();
-        m_lastUndoIndex = m_commandHistory->index();
-    }
+    ArrowKeyPropertyCommand *cmd = new ArrowKeyPropertyCommand(this);
+    cmd->init(selection, operation);
+    m_undoStack.push(cmd);
 }
 
 bool FormWindow::handleKeyReleaseEvent(QWidget *, QWidget *, QKeyEvent *e)
@@ -1809,7 +1853,7 @@ void FormWindow::paste(PasteMode pasteMode)
             foreach (QWidget *w, clipboard.m_widgets) {
                 InsertWidgetCommand *cmd = new InsertWidgetCommand(this);
                 cmd->init(w);
-                m_commandHistory->push(cmd);
+                m_undoStack.push(cmd);
                 selectWidget(w);
             }
         }
@@ -1819,7 +1863,7 @@ void FormWindow::paste(PasteMode pasteMode)
                 ensureUniqueObjectName(a);
                 AddActionCommand *cmd = new AddActionCommand(this);
                 cmd->init(a);
-                m_commandHistory->push(cmd);
+                m_undoStack.push(cmd);
             }
         endCommand();
     } while (false);
@@ -1955,14 +1999,12 @@ void FormWindow::breakLayout(QWidget *w)
 
 void FormWindow::beginCommand(const QString &description)
 {
-    if (m_lastIndex > m_commandHistory->index())
-        m_lastIndex = -1;
-    m_commandHistory->beginMacro(description);
+    m_undoStack.beginMacro(description);
 }
 
 void FormWindow::endCommand()
 {
-    m_commandHistory->endMacro();
+    m_undoStack.endMacro();
 }
 
 void FormWindow::raiseWidgets()
@@ -1977,7 +2019,7 @@ void FormWindow::raiseWidgets()
     foreach (QWidget *widget, widgets) {
         RaiseWidgetCommand *cmd = new RaiseWidgetCommand(this);
         cmd->init(widget);
-        m_commandHistory->push(cmd);
+        m_undoStack.push(cmd);
     }
     endCommand();
 }
@@ -1994,7 +2036,7 @@ void FormWindow::lowerWidgets()
     foreach (QWidget *widget, widgets) {
         LowerWidgetCommand *cmd = new LowerWidgetCommand(this);
         cmd->init(widget);
-        m_commandHistory->push(cmd);
+        m_undoStack.push(cmd);
     }
     endCommand();
 }
@@ -2375,20 +2417,12 @@ FormWindow *FormWindow::findFormWindow(QWidget *w)
 
 bool FormWindow::isDirty() const
 {
-    return m_dirty;
+    return m_undoStack.isDirty();
 }
 
 void FormWindow::setDirty(bool dirty)
 {
-    m_dirty = dirty;
-
-    if (!m_dirty)
-        m_lastIndex = m_commandHistory->index();
-}
-
-void FormWindow::updateDirty()
-{
-    m_dirty = m_commandHistory->index() != m_lastIndex;
+    m_undoStack.setDirty(dirty);
 }
 
 QWidget *FormWindow::containerAt(const QPoint &pos)
@@ -2757,7 +2791,7 @@ bool FormWindow::dropDockWidget(QDesignerDnDItemInterface *item, const QPoint &g
         qVariantSetValue(v, e);
         SetPropertyCommand *cmd = new SetPropertyCommand(this);
         cmd->init(widget, dockWidgetAreaName, v);
-        m_commandHistory->push(cmd);
+        m_undoStack.push(cmd);
     }
 
     endCommand();
@@ -2921,6 +2955,13 @@ QWidget *FormWindow::formContainer() const
     return m_widgetStack->formContainer();
 }
 
+QUndoStack *FormWindow::commandHistory() const
+{
+    return const_cast<QDesignerUndoStack &>(m_undoStack).qundoStack();
+}
+
 } // namespace
 
 QT_END_NAMESPACE
+
+Q_DECLARE_METATYPE(qdesigner_internal::ArrowKeyOperation)
diff --git a/tools/designer/src/components/formeditor/formwindow.h b/tools/designer/src/components/formeditor/formwindow.h
index 3eee476..dc0026f 100644
--- a/tools/designer/src/components/formeditor/formwindow.h
+++ b/tools/designer/src/components/formeditor/formwindow.h
@@ -43,6 +43,7 @@
 #define FORMWINDOW_H
 
 #include "formeditor_global.h"
+#include "qdesignerundostack.h"
 #include <formwindowbase_p.h>
 
 // Qt
@@ -64,7 +65,6 @@ class QLabel;
 class QTimer;
 class QAction;
 class QMenu;
-class QUndoStack;
 class QRubberBand;
 
 namespace qdesigner_internal {
@@ -165,9 +165,7 @@ public:
     void manageWidget(QWidget *w);
     void unmanageWidget(QWidget *w);
 
-    inline QUndoStack *commandHistory() const
-    { return m_commandHistory; }
-
+    virtual QUndoStack *commandHistory() const;
     void beginCommand(const QString &description);
     void endCommand();
 
@@ -238,7 +236,6 @@ protected:
 
 private slots:
     void selectionChangedTimerDone();
-    void updateDirty();
     void checkSelection();
     void checkSelectionNow();
     void slotSelectWidget(QAction *);
@@ -263,7 +260,6 @@ private:
 
     int getValue(const QRect &rect, int key, bool size) const;
     int calcValue(int val, bool forward, bool snap, int snapOffset) const;
-    QRect applyValue(const QRect &rect, int val, int key, bool size) const;
     void handleClickSelection(QWidget *managedWidget, unsigned mouseFlags);
 
     bool frameNeeded(QWidget *w) const;
@@ -338,7 +334,7 @@ private:
 
     QPoint m_startPos;
 
-    QUndoStack *m_commandHistory;
+    QDesignerUndoStack m_undoStack;
 
     QString m_fileName;
 
@@ -352,9 +348,6 @@ private:
     QTimer *m_checkSelectionTimer;
     QTimer *m_geometryChangedTimer;
 
-    int m_dirty;
-    int m_lastIndex;
-
     FormWindowWidgetStack *m_widgetStack;
     WidgetEditorTool *m_widgetEditor;
 
@@ -368,8 +361,6 @@ private:
     QString m_exportMacro;
     QStringList m_includeHints;
 
-    QList<SetPropertyCommand*> m_moveSelection;
-    int m_lastUndoIndex;
     QPoint m_contextMenuPosition;
 
 private:
diff --git a/tools/designer/src/components/formeditor/qdesignerundostack.cpp b/tools/designer/src/components/formeditor/qdesignerundostack.cpp
new file mode 100644
index 0000000..007031d
--- /dev/null
+++ b/tools/designer/src/components/formeditor/qdesignerundostack.cpp
@@ -0,0 +1,112 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Designer 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qdesignerundostack.h"
+
+#include <QtGui/QUndoStack>
+#include <QtGui/QUndoCommand>
+
+QT_BEGIN_NAMESPACE
+
+namespace qdesigner_internal {
+
+QDesignerUndoStack::QDesignerUndoStack(QObject *parent) :
+    QObject(parent),
+    m_undoStack(new QUndoStack),
+    m_fakeDirty(false)
+{
+    connect(m_undoStack, SIGNAL(indexChanged(int)), this, SIGNAL(changed()));
+}
+
+QDesignerUndoStack::~QDesignerUndoStack()
+{ // QUndoStack is managed by the QUndoGroup
+}
+
+void QDesignerUndoStack::push(QUndoCommand * cmd)
+{
+    m_undoStack->push(cmd);
+}
+
+void QDesignerUndoStack::beginMacro(const QString &text)
+{
+    m_undoStack->beginMacro(text);
+}
+
+void QDesignerUndoStack::endMacro()
+{
+    m_undoStack->endMacro();
+}
+
+int  QDesignerUndoStack::index() const
+{
+    return m_undoStack->index();
+}
+
+const QUndoStack *QDesignerUndoStack::qundoStack() const
+{
+    return m_undoStack;
+}
+QUndoStack *QDesignerUndoStack::qundoStack()
+{
+    return m_undoStack;
+}
+
+bool QDesignerUndoStack::isDirty() const
+{
+    return m_fakeDirty || !m_undoStack->isClean();
+}
+
+void QDesignerUndoStack::setDirty(bool v)
+{
+    if (isDirty() == v)
+        return;
+    if (v) {
+        m_fakeDirty = true;
+        emit changed();
+    } else {
+        m_fakeDirty = false;
+        m_undoStack->setClean();
+    }
+}
+
+} // namespace qdesigner_internal
+
+QT_END_NAMESPACE
diff --git a/tools/designer/src/components/formeditor/qdesignerundostack.h b/tools/designer/src/components/formeditor/qdesignerundostack.h
new file mode 100644
index 0000000..5451ad8
--- /dev/null
+++ b/tools/designer/src/components/formeditor/qdesignerundostack.h
@@ -0,0 +1,90 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Designer 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QDESIGNERUNDOSTACK_H
+#define QDESIGNERUNDOSTACK_H
+
+#include <QtCore/QObject>
+
+QT_BEGIN_NAMESPACE
+class QUndoStack;
+class QUndoCommand;
+
+namespace qdesigner_internal {
+
+/* QDesignerUndoStack: A QUndoStack extended by a way of setting it to
+ * "dirty" indepently of commands (by modifications without commands
+ * such as resizing). Accomplished via bool m_fakeDirty flag. The
+ * lifecycle of the QUndoStack is managed by the QUndoGroup. */
+class QDesignerUndoStack : public QObject
+{
+    Q_DISABLE_COPY(QDesignerUndoStack)
+    Q_OBJECT
+public:
+    explicit QDesignerUndoStack(QObject *parent = 0);
+    virtual ~QDesignerUndoStack();
+
+    void push(QUndoCommand * cmd);
+    void beginMacro(const QString &text);
+    void endMacro();
+    int  index() const;
+
+    const QUndoStack *qundoStack() const;
+    QUndoStack *qundoStack();
+
+    bool isDirty() const;
+
+signals:
+    void changed();
+
+public slots:
+    void setDirty(bool);
+
+private:
+    QUndoStack *m_undoStack;
+    bool m_fakeDirty;
+};
+
+} // namespace qdesigner_internal
+
+QT_END_NAMESPACE
+
+#endif // QDESIGNERUNDOSTACK_H
diff --git a/tools/designer/src/lib/shared/qdesigner_formwindowcommand.cpp b/tools/designer/src/lib/shared/qdesigner_formwindowcommand.cpp
index 8c55d26..490373e 100644
--- a/tools/designer/src/lib/shared/qdesigner_formwindowcommand.cpp
+++ b/tools/designer/src/lib/shared/qdesigner_formwindowcommand.cpp
@@ -62,8 +62,10 @@ QT_BEGIN_NAMESPACE
 namespace qdesigner_internal {
 
 // ---- QDesignerFormWindowCommand ----
-QDesignerFormWindowCommand::QDesignerFormWindowCommand(const QString &description, QDesignerFormWindowInterface *formWindow)
-    : QUndoCommand(description),
+QDesignerFormWindowCommand::QDesignerFormWindowCommand(const QString &description,
+                                                       QDesignerFormWindowInterface *formWindow,
+                                                       QUndoCommand *parent)
+    : QUndoCommand(description, parent),
       m_formWindow(formWindow)
 {
 }
diff --git a/tools/designer/src/lib/shared/qdesigner_formwindowcommand_p.h b/tools/designer/src/lib/shared/qdesigner_formwindowcommand_p.h
index d8cd018..d73d70c 100644
--- a/tools/designer/src/lib/shared/qdesigner_formwindowcommand_p.h
+++ b/tools/designer/src/lib/shared/qdesigner_formwindowcommand_p.h
@@ -70,7 +70,9 @@ class QDESIGNER_SHARED_EXPORT QDesignerFormWindowCommand: public QUndoCommand
 {
 
 public:
-    QDesignerFormWindowCommand(const QString &description, QDesignerFormWindowInterface *formWindow);
+    QDesignerFormWindowCommand(const QString &description,
+                               QDesignerFormWindowInterface *formWindow,
+                               QUndoCommand *parent = 0);
 
     virtual void undo();
     virtual void redo();
diff --git a/tools/designer/src/lib/shared/qdesigner_propertycommand.cpp b/tools/designer/src/lib/shared/qdesigner_propertycommand.cpp
index 822c14b..6cc054c 100644
--- a/tools/designer/src/lib/shared/qdesigner_propertycommand.cpp
+++ b/tools/designer/src/lib/shared/qdesigner_propertycommand.cpp
@@ -926,8 +926,9 @@ bool PropertyListCommand::PropertyDescription::equals(const PropertyDescription
 
 
 // ---- PropertyListCommand
-PropertyListCommand::PropertyListCommand(QDesignerFormWindowInterface *formWindow) :
-    QDesignerFormWindowCommand(QString(), formWindow)
+PropertyListCommand::PropertyListCommand(QDesignerFormWindowInterface *formWindow,
+                                         QUndoCommand *parent) :
+    QDesignerFormWindowCommand(QString(), formWindow, parent)
 {
 }
 
@@ -966,10 +967,17 @@ bool PropertyListCommand::add(QObject *object, const QString &propertyName)
         if (!match || m_propertyDescription.m_specialProperty == SP_ObjectName)
             return false;
     }
-    m_propertyHelperList.push_back(PropertyHelper(object, m_propertyDescription.m_specialProperty, sheet, index));
+
+    const PropertyHelperPtr ph(createPropertyHelper(object, m_propertyDescription.m_specialProperty, sheet, index));
+    m_propertyHelperList.push_back(ph);
     return true;
 }
 
+PropertyHelper *PropertyListCommand::createPropertyHelper(QObject *object, SpecialProperty sp,
+                                                          QDesignerPropertySheetExtension *sheet, int sheetIndex) const
+{
+    return new PropertyHelper(object, sp, sheet, sheetIndex);
+}
 
 // Init from a list and make sure referenceObject is added first to obtain the right property group
 bool PropertyListCommand::initList(const ObjectList &list, const QString &apropertyName, QObject *referenceObject)
@@ -993,19 +1001,19 @@ bool PropertyListCommand::initList(const ObjectList &list, const QString &aprope
 QObject* PropertyListCommand::object(int index) const
 {
     Q_ASSERT(index < m_propertyHelperList.size());
-    return m_propertyHelperList[index].object();
+    return m_propertyHelperList.at(index)->object();
 }
 
 QVariant PropertyListCommand::oldValue(int index) const
 {
     Q_ASSERT(index < m_propertyHelperList.size());
-    return m_propertyHelperList[index].oldValue();
+    return m_propertyHelperList.at(index)->oldValue();
 }
 
 void PropertyListCommand::setOldValue(const QVariant &oldValue, int index)
 {
     Q_ASSERT(index < m_propertyHelperList.size());
-    m_propertyHelperList[index].setOldValue(oldValue);
+    m_propertyHelperList.at(index)->setOldValue(oldValue);
 }
 // ----- SetValueFunction: Set a new value when applied to a PropertyHelper.
 class SetValueFunction {
@@ -1065,9 +1073,10 @@ template <class PropertyListIterator, class Function>
     bool updatedPropertyEditor = false;
 
     for (PropertyListIterator it = begin; it != end; ++it) {
-        if (QObject* object = it->object()) { // Might have been deleted in the meantime
-            const PropertyHelper::Value newValue = function(*it);
-            updateMask |= it->updateMask();
+        PropertyHelper *ph = it->data();
+        if (QObject* object = ph->object()) { // Might have been deleted in the meantime
+            const PropertyHelper::Value newValue = function( *ph );
+            updateMask |= ph->updateMask();
             // Update property editor if it is the current object
             if (!updatedPropertyEditor && propertyEditor && object == propertyEditor->object()) {
                 propertyEditor->setPropertyValue(propertyName, newValue.first,  newValue.second);
@@ -1084,9 +1093,11 @@ template <class PropertyListIterator, class Function>
 unsigned PropertyListCommand::setValue(QVariant value, bool changed, unsigned subPropertyMask)
 {
     if(debugPropertyCommands)
-        qDebug() << "PropertyListCommand::setValue(" << value <<  changed << subPropertyMask << ')';
+        qDebug() << "PropertyListCommand::setValue(" << value
+                 << changed << subPropertyMask << ')';
     return changePropertyList(formWindow()->core(),
-                              m_propertyDescription.m_propertyName, m_propertyHelperList.begin(), m_propertyHelperList.end(),
+                              m_propertyDescription.m_propertyName,
+                              m_propertyHelperList.begin(), m_propertyHelperList.end(),
                               SetValueFunction(formWindow(), PropertyHelper::Value(value, changed), subPropertyMask));
 }
 
@@ -1146,15 +1157,16 @@ bool PropertyListCommand::canMergeLists(const PropertyHelperList& other) const
     if (m_propertyHelperList.size() !=  other.size())
         return false;
     for (int i = 0; i < m_propertyHelperList.size(); i++) {
-        if (!m_propertyHelperList[i].canMerge(other[i]))
+        if (!m_propertyHelperList.at(i)->canMerge(*other.at(i)))
             return false;
     }
     return true;
 }
 
 // ---- SetPropertyCommand ----
-SetPropertyCommand::SetPropertyCommand(QDesignerFormWindowInterface *formWindow)
-    :  PropertyListCommand(formWindow),
+SetPropertyCommand::SetPropertyCommand(QDesignerFormWindowInterface *formWindow,
+                                       QUndoCommand *parent)
+    :  PropertyListCommand(formWindow, parent),
        m_subPropertyMask(SubPropertyAll)
 {
 }
@@ -1210,7 +1222,7 @@ unsigned SetPropertyCommand::subPropertyMask(const QVariant &newValue, QObject *
 void SetPropertyCommand::setDescription()
 {
     if (propertyHelperList().size() == 1) {
-        setText(QApplication::translate("Command", "Changed '%1' of '%2'").arg(propertyName()).arg(propertyHelperList()[0].object()->objectName()));
+        setText(QApplication::translate("Command", "Changed '%1' of '%2'").arg(propertyName()).arg(propertyHelperList().at(0)->object()->objectName()));
     } else {
         int count = propertyHelperList().size();
         setText(QApplication::translate("Command", "Changed '%1' of %n objects", "", QCoreApplication::UnicodeUTF8, count).arg(propertyName()));
@@ -1231,6 +1243,11 @@ int SetPropertyCommand::id() const
     return 1976;
 }
 
+QVariant SetPropertyCommand::mergeValue(const QVariant &newValue)
+{
+    return newValue;
+}
+
 bool SetPropertyCommand::mergeWith(const QUndoCommand *other)
 {
     if (id() != other->id() || !formWindow()->isDirty())
@@ -1248,7 +1265,10 @@ bool SetPropertyCommand::mergeWith(const QUndoCommand *other)
         !canMergeLists(cmd->propertyHelperList()))
         return false;
 
-    m_newValue = cmd->newValue();
+    const QVariant newValue = mergeValue(cmd->newValue());
+    if (!newValue.isValid())
+        return false;
+    m_newValue = newValue;
     m_subPropertyMask |= cmd->m_subPropertyMask;
     if(debugPropertyCommands)
         qDebug() << "SetPropertyCommand::mergeWith() succeeded " << propertyName();
@@ -1289,7 +1309,7 @@ bool ResetPropertyCommand::init(const ObjectList &list, const QString &aproperty
 void ResetPropertyCommand::setDescription()
 {
     if (propertyHelperList().size() == 1) {
-        setText(QApplication::translate("Command", "Reset '%1' of '%2'").arg(propertyName()).arg(propertyHelperList()[0].object()->objectName()));
+        setText(QApplication::translate("Command", "Reset '%1' of '%2'").arg(propertyName()).arg(propertyHelperList().at(0)->object()->objectName()));
     } else {
         int count = propertyHelperList().size();
         setText(QApplication::translate("Command", "Reset '%1' of %n objects", "", QCoreApplication::UnicodeUTF8, count).arg(propertyName()));
diff --git a/tools/designer/src/lib/shared/qdesigner_propertycommand_p.h b/tools/designer/src/lib/shared/qdesigner_propertycommand_p.h
index f6b7262..75b23ca 100644
--- a/tools/designer/src/lib/shared/qdesigner_propertycommand_p.h
+++ b/tools/designer/src/lib/shared/qdesigner_propertycommand_p.h
@@ -58,6 +58,7 @@
 #include <QtCore/QVariant>
 #include <QtCore/QList>
 #include <QtCore/QPair>
+#include <QtCore/QSharedPointer>
 
 QT_BEGIN_NAMESPACE
 
@@ -77,11 +78,12 @@ enum SpecialProperty {
 //Determine special property
 enum SpecialProperty getSpecialProperty(const QString& propertyName);
 
-
 // A helper class for applying properties to objects.
 // Can be used for Set commands (setValue(), restoreOldValue()) or
 // Reset Commands     restoreDefaultValue(), restoreOldValue()).
-class PropertyHelper {
+//
+class QDESIGNER_SHARED_EXPORT PropertyHelper {
+    Q_DISABLE_COPY(PropertyHelper)
 public:
     // A pair of Value and changed flag
     typedef QPair<QVariant, bool> Value;
@@ -92,11 +94,13 @@ public:
                    SpecialProperty specialProperty,
                    QDesignerPropertySheetExtension *sheet,
                    int index);
+    virtual ~PropertyHelper() {}
 
     QObject *object() const { return m_object; }
     SpecialProperty specialProperty() const { return m_specialProperty; }
-    // set a new value
-    Value setValue(QDesignerFormWindowInterface *fw, const QVariant &value, bool changed, unsigned subPropertyMask);
+    // set a new value. Can be overwritten to perform a transformation (see
+    // handling of Arrow key move in FormWindow class).
+    virtual Value setValue(QDesignerFormWindowInterface *fw, const QVariant &value, bool changed, unsigned subPropertyMask);
 
     // restore old value
     Value restoreOldValue(QDesignerFormWindowInterface *fw);
@@ -147,7 +151,7 @@ class QDESIGNER_SHARED_EXPORT PropertyListCommand : public QDesignerFormWindowCo
 public:
     typedef QList<QObject *> ObjectList;
 
-    explicit PropertyListCommand(QDesignerFormWindowInterface *formWindow);
+    explicit PropertyListCommand(QDesignerFormWindowInterface *formWindow, QUndoCommand *parent = 0);
 
     QObject* object(int index = 0) const;
 
@@ -159,8 +163,8 @@ public:
     virtual void undo();
 
 protected:
-    typedef QList<PropertyHelper> PropertyHelperList;
-
+    typedef QSharedPointer<PropertyHelper> PropertyHelperPtr;
+    typedef QList<PropertyHelperPtr> PropertyHelperList;
 
     // add an object
     bool add(QObject *object, const QString &propertyName);
@@ -204,6 +208,10 @@ protected:
     };
     const PropertyDescription &propertyDescription() const { return  m_propertyDescription; }
 
+protected:
+    virtual PropertyHelper *createPropertyHelper(QObject *o, SpecialProperty sp,
+                                                 QDesignerPropertySheetExtension *sheet, int sheetIndex) const;
+
 private:
     PropertyDescription m_propertyDescription;
     PropertyHelperList m_propertyHelperList;
@@ -215,7 +223,7 @@ class QDESIGNER_SHARED_EXPORT SetPropertyCommand: public PropertyListCommand
 public:
     typedef QList<QObject *> ObjectList;
 
-    explicit SetPropertyCommand(QDesignerFormWindowInterface *formWindow);
+    explicit SetPropertyCommand(QDesignerFormWindowInterface *formWindow, QUndoCommand *parent = 0);
 
     bool init(QObject *object, const QString &propertyName, const QVariant &newValue);
     bool init(const ObjectList &list, const QString &propertyName, const QVariant &newValue,
@@ -232,6 +240,10 @@ public:
     bool mergeWith(const QUndoCommand *other);
 
     virtual void redo();
+
+protected:
+    virtual QVariant mergeValue(const QVariant &newValue);
+
 private:
     unsigned subPropertyMask(const QVariant &newValue, QObject *referenceObject);
     void setDescription();