diff -r 41300fa6a67c -r f7bc934e204c doc/src/snippets/code/doc_src_qtdesigner.qdoc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/src/snippets/code/doc_src_qtdesigner.qdoc	Wed Mar 31 11:06:36 2010 +0300
@@ -0,0 +1,334 @@
+/****************************************************************************
+**
+** 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 documentation 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [0]
+#include <QtDesigner>
+//! [0]
+
+
+//! [1]
+CONFIG += designer
+//! [1]
+
+
+//! [2]
+QDesignerMemberSheetExtension *memberSheet  = 0;
+QExtensionManager manager = formEditor->extensionManager();
+
+memberSheet = qt_extension<QDesignerMemberSheetExtension*>(manager, widget);
+int index = memberSheet->indexOf(setEchoMode);
+memberSheet->setVisible(index, false);
+
+delete memberSheet;
+//! [2]
+
+
+//! [3]
+class MyMemberSheetExtension : public QObject,
+        public QDesignerMemberSheetExtension
+{
+    Q_OBJECT
+    Q_INTERFACES(QDesignerMemberSheetExtension)
+
+public:
+    ...
+}
+//! [3]
+
+
+//! [4]
+QObject *ANewExtensionFactory::createExtension(QObject *object,
+        const QString &iid, QObject *parent) const
+{
+    if (iid != Q_TYPEID(QDesignerMemberSheetExtension))
+        return 0;
+
+    if (MyCustomWidget *widget = qobject_cast<MyCustomWidget*>
+           (object))
+        return new MyMemberSheetExtension(widget, parent);
+
+    return 0;
+}
+//! [4]
+
+
+//! [5]
+QObject *AGeneralExtensionFactory::createExtension(QObject *object,
+        const QString &iid, QObject *parent) const
+{
+    MyCustomWidget *widget = qobject_cast<MyCustomWidget*>(object);
+
+    if (widget && (iid == Q_TYPEID(QDesignerTaskMenuExtension))) {
+        return new MyTaskMenuExtension(widget, parent);
+
+    } else if (widget && (iid == Q_TYPEID(QDesignerMemberSheetExtension))) {
+        return new MyMemberSheetExtension(widget, parent);
+
+    } else {
+        return 0;
+    }
+}
+//! [5]
+
+
+//! [6]
+class MyContainerExtension : public QObject,
+       public QDesignerContainerExtension
+{
+    Q_OBJECT
+    Q_INTERFACES(QDesignerContainerExtension)
+
+public:
+    MyContainerExtension(MyCustomWidget *widget,
+                         QObject *parent = 0);
+    int count() const;
+    QWidget *widget(int index) const;
+    int currentIndex() const;
+    void setCurrentIndex(int index);
+    void addWidget(QWidget *widget);
+    void insertWidget(int index, QWidget *widget);
+    void remove(int index);
+
+private:
+    MyCustomWidget *myWidget;
+};
+//! [6]
+
+
+//! [7]
+QObject *ANewExtensionFactory::createExtension(QObject *object,
+        const QString &iid, QObject *parent) const
+{
+    if (iid != Q_TYPEID(QDesignerContainerExtension))
+        return 0;
+
+    if (MyCustomWidget *widget = qobject_cast<MyCustomWidget*>
+           (object))
+        return new MyContainerExtension(widget, parent);
+
+    return 0;
+}
+//! [7]
+
+
+//! [8]
+QObject *AGeneralExtensionFactory::createExtension(QObject *object,
+        const QString &iid, QObject *parent) const
+{
+    MyCustomWidget *widget = qobject_cast<MyCustomWidget*>(object);
+
+    if (widget && (iid == Q_TYPEID(QDesignerTaskMenuExtension))) {
+        return new MyTaskMenuExtension(widget, parent);
+
+    } else if (widget && (iid == Q_TYPEID(QDesignerContainerExtension))) {
+        return new MyContainerExtension(widget, parent);
+
+    } else {
+        return 0;
+    }
+}
+//! [8]
+
+
+//! [9]
+class MyTaskMenuExtension : public QObject,
+        public QDesignerTaskMenuExtension
+{
+    Q_OBJECT
+    Q_INTERFACES(QDesignerTaskMenuExtension)
+
+public:
+    MyTaskMenuExtension(MyCustomWidget *widget, QObject *parent);
+
+    QAction *preferredEditAction() const;
+    QList<QAction *> taskActions() const;
+
+private slots:
+    void mySlot();
+
+private:
+    MyCustomWidget *widget;
+    QAction *myAction;
+};
+//! [9]
+
+
+//! [10]
+QObject *ANewExtensionFactory::createExtension(QObject *object,
+        const QString &iid, QObject *parent) const
+{
+    if (iid != Q_TYPEID(QDesignerTaskMenuExtension))
+        return 0;
+
+    if (MyCustomWidget *widget = qobject_cast<MyCustomWidget*>(object))
+        return new MyTaskMenuExtension(widget, parent);
+
+    return 0;
+}
+//! [10]
+
+
+//! [11]
+QObject *AGeneralExtensionFactory::createExtension(QObject *object,
+        const QString &iid, QObject *parent) const
+{
+    MyCustomWidget *widget = qobject_cast<MyCustomWidget*>(object);
+
+    if (widget && (iid == Q_TYPEID(QDesignerContainerExtension))) {
+        return new MyContainerExtension(widget, parent);
+
+    } else if (widget && (iid == Q_TYPEID(QDesignerTaskMenuExtension))) {
+        return new MyTaskMenuExtension(widget, parent);
+
+    } else {
+        return 0;
+    }
+}
+//! [11]
+
+
+//! [12]
+#include customwidgetoneinterface.h
+#include customwidgettwointerface.h
+#include customwidgetthreeinterface.h
+
+#include <QtDesigner/QtDesigner>
+#include <QtCore/qplugin.h>
+
+class MyCustomWidgets: public QObject, public QDesignerCustomWidgetCollectionInterface
+{
+    Q_OBJECT
+    Q_INTERFACES(QDesignerCustomWidgetCollectionInterface)
+
+public:
+    MyCustomWidgets(QObject *parent = 0);
+
+    virtual QList<QDesignerCustomWidgetInterface*> customWidgets() const;
+
+private:
+    QList<QDesignerCustomWidgetInterface*> widgets;
+};
+//! [12]
+
+
+//! [13]
+MyCustomWidgets::MyCustomWidgets(QObject *parent)
+        : QObject(parent)
+{
+    widgets.append(new CustomWidgetOneInterface(this));
+    widgets.append(new CustomWidgetTwoInterface(this));
+    widgets.append(new CustomWidgetThreeInterface(this));
+}
+
+QList<QDesignerCustomWidgetInterface*> MyCustomWidgets::customWidgets() const
+{
+    return widgets;
+}
+
+Q_EXPORT_PLUGIN2(customwidgetsplugin, MyCustomWidgets)
+//! [13]
+
+
+//! [14]
+Q_EXPORT_PLUGIN2(customwidgetplugin, MyCustomWidget)
+//! [14]
+
+
+//! [15]
+QDesignerPropertySheetExtension *propertySheet  = 0;
+QExtensionManager manager = formEditor->extensionManager();
+
+propertySheet = qt_extension<QDesignerPropertySheetExtension*>(manager, widget);
+int index = propertySheet->indexOf(QLatin1String("margin"));
+
+propertySheet->setProperty(index, 10);
+propertySheet->setChanged(index, true);
+
+delete propertySheet;
+//! [15]
+
+
+//! [16]
+class MyPropertySheetExtension : public QObject,
+        public QDesignerPropertySheetExtension
+{
+    Q_OBJECT
+    Q_INTERFACES(QDesignerPropertySheetExtension)
+
+public:
+    ...
+}
+//! [16]
+
+
+//! [17]
+QObject *ANewExtensionFactory::createExtension(QObject *object,
+        const QString &iid, QObject *parent) const
+{
+    if (iid != Q_TYPEID(QDesignerPropertySheetExtension))
+        return 0;
+
+    if (MyCustomWidget *widget = qobject_cast<MyCustomWidget*>
+           (object))
+        return new MyPropertySheetExtension(widget, parent);
+
+    return 0;
+}
+//! [17]
+
+
+//! [18]
+QObject *AGeneralExtensionFactory::createExtension(QObject *object,
+        const QString &iid, QObject *parent) const
+{
+    MyCustomWidget *widget = qobject_cast<MyCustomWidget*>(object);
+
+    if (widget && (iid == Q_TYPEID(QDesignerTaskMenuExtension))) {
+        return new MyTaskMenuExtension(widget, parent);
+
+    } else if (widget && (iid == Q_TYPEID(QDesignerPropertySheetExtension))) {
+        return new MyPropertySheetExtension(widget, parent);
+
+    } else {
+        return 0;
+    }
+}
+//! [18]