First commit

examples/object_controller/CMakeLists.txt

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+# Tell CMake to run moc when necessary:
+set(CMAKE_AUTOMOC ON)
+
+# As moc files are generated in the binary dir, tell CMake
+# to always look for includes there:
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+SET(example_name object_controller)
+
+SET(KIT_SRCS
+  main.cpp
+  objectcontroller.cpp
+  )
+  
+ADD_EXECUTABLE(${example_name} ${KIT_SRCS})
+TARGET_LINK_LIBRARIES(${example_name} ${PROJECT_NAME} ${QT_TARGETS})

examples/object_controller/main.cpp

@@ -0,0 +1,167 @@
+/****************************************************************************
+**
+** 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 a Qt Solutions component.
+**
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+****************************************************************************/
+
+#include <QApplication>
+#include <QSpinBox>
+#include <QDialogButtonBox>
+#include <QLineEdit>
+#include <QDialog>
+#include <QComboBox>
+#include <QToolButton>
+#include <QPushButton>
+#include <QBoxLayout>
+#include <QTreeWidget>
+#include <QAction>
+#include <QDesktopWidget>
+#include <QTextDocument>
+#include <QCalendarWidget>
+#include <QTimeLine>
+#include "objectcontroller.h"
+
+class MyController : public QDialog
+{
+    Q_OBJECT
+public:
+    MyController(QWidget *parent = 0);
+    ~MyController();
+private slots:
+    void createAndControl();
+private:
+    QComboBox *theClassCombo;
+    ObjectController *theController;
+    QStringList theClassNames;
+    QObject *theControlledObject;
+};
+
+MyController::MyController(QWidget *parent)
+    : QDialog(parent), theControlledObject(0)
+{
+    theClassCombo = new QComboBox(this);
+    QToolButton *button = new QToolButton(this);
+    theController = new ObjectController(this);
+    QDialogButtonBox *buttonBox = new QDialogButtonBox(this);
+
+    connect(button, SIGNAL(clicked()), this, SLOT(createAndControl()));
+    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
+
+    button->setText(tr("Create And Control"));
+    buttonBox->setStandardButtons(QDialogButtonBox::Close);
+
+    QVBoxLayout *layout = new QVBoxLayout(this);
+    QHBoxLayout *internalLayout = new QHBoxLayout();
+    internalLayout->addWidget(theClassCombo);
+    internalLayout->addWidget(button);
+    layout->addLayout(internalLayout);
+    layout->addWidget(theController);
+    layout->addWidget(buttonBox);
+
+    theClassNames.append(QLatin1String("QWidget"));
+    theClassNames.append(QLatin1String("QPushButton"));
+    theClassNames.append(QLatin1String("QDialogButtonBox"));
+    theClassNames.append(QLatin1String("QTreeWidget"));
+    theClassNames.append(QLatin1String("QCalendarWidget"));
+    theClassNames.append(QLatin1String("QAction"));
+    theClassNames.append(QLatin1String("QTimeLine"));
+    theClassNames.append(QLatin1String("QTextDocument"));
+
+    theClassCombo->addItems(theClassNames);
+}
+
+MyController::~MyController()
+{
+    if (theControlledObject)
+        delete theControlledObject;
+}
+
+void MyController::createAndControl()
+{
+    QObject *newObject = 0;
+    QString className = theClassNames.at(theClassCombo->currentIndex());
+    if (className == QLatin1String("QWidget"))
+        newObject = new QWidget();
+    else if (className == QLatin1String("QPushButton"))
+        newObject = new QPushButton();
+    else if (className == QLatin1String("QDialogButtonBox"))
+        newObject = new QDialogButtonBox();
+    else if (className == QLatin1String("QTreeWidget"))
+        newObject = new QTreeWidget();
+    else if (className == QLatin1String("QCalendarWidget"))
+        newObject = new QCalendarWidget();
+    else if (className == QLatin1String("QAction"))
+        newObject = new QAction(0);
+    else if (className == QLatin1String("QTimeLine"))
+        newObject = new QTimeLine();
+    else if (className == QLatin1String("QTextDocument"))
+        newObject = new QTextDocument();
+
+    if (!newObject)
+        return;
+
+    QWidget *newWidget = qobject_cast<QWidget *>(newObject);
+    if (newWidget) {
+        QRect r = newWidget->geometry();
+        r.setSize(newWidget->sizeHint());
+        r.setWidth(qMax(r.width(), 150));
+        r.setHeight(qMax(r.height(), 50));
+        r.moveCenter(QApplication::desktop()->geometry().center());
+        newWidget->setGeometry(r);
+        newWidget->setWindowTitle(tr("Controlled Object: %1").arg(className));
+        newWidget->show();
+    }
+
+    if (theControlledObject)
+        delete theControlledObject;
+
+    theControlledObject = newObject;
+    theController->setObject(theControlledObject);
+}
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+
+    MyController *controller = new MyController();
+    controller->show();
+
+    int ret = app.exec();
+
+    return ret;
+}
+
+#include "main.moc"

examples/object_controller/object_controller.qdoc

@@ -0,0 +1,54 @@
+/****************************************************************************
+**
+** 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 a Qt Solutions component.
+**
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+****************************************************************************/
+
+/*! 
+    \page qtpropertybrowser-example-object_controller.html
+    \title The Object Controller Example.
+
+    \image object_controller.png
+
+    This example implements a simple widget component which shows
+    QObject's and its subclasses' properties. The user can modify these properies interacively
+    and the object controller applies the changes to the controlled object.
+    The object controller is similar to the property editor used in QDesigner application.
+    To control the object just instantiate ObjectController, set controlled object (any QObject subclass) by
+    calling ObjectController::setObject() and show the controller.
+
+    The source files can be found in examples/object_controller directory of the package.
+*/

examples/object_controller/objectcontroller.cpp

@@ -0,0 +1,391 @@
+/****************************************************************************
+**
+** 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 a Qt Solutions component.
+**
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+****************************************************************************/
+
+#include <QMetaObject>
+#include <QMetaProperty>
+#include <QVBoxLayout>
+#include <QScrollArea>
+#include "objectcontroller.h"
+#include "qtvariantproperty.h"
+#include "qtgroupboxpropertybrowser.h"
+#include "qttreepropertybrowser.h"
+#include "qtpropertybrowser.h"
+
+class ObjectControllerPrivate
+{
+    ObjectController *q_ptr;
+    Q_DECLARE_PUBLIC(ObjectController)
+public:
+
+    void addClassProperties(const QMetaObject *metaObject);
+    void updateClassProperties(const QMetaObject *metaObject, bool recursive);
+    void saveExpandedState();
+    void restoreExpandedState();
+    void slotValueChanged(QtProperty *property, const QVariant &value);
+    int enumToInt(const QMetaEnum &metaEnum, int enumValue) const;
+    int intToEnum(const QMetaEnum &metaEnum, int intValue) const;
+    int flagToInt(const QMetaEnum &metaEnum, int flagValue) const;
+    int intToFlag(const QMetaEnum &metaEnum, int intValue) const;
+    bool isSubValue(int value, int subValue) const;
+    bool isPowerOf2(int value) const;
+
+    QObject                  *m_object;
+
+    QMap<const QMetaObject *, QtProperty *> m_classToProperty;
+    QMap<QtProperty *, const QMetaObject *> m_propertyToClass;
+    QMap<QtProperty *, int>     m_propertyToIndex;
+    QMap<const QMetaObject *, QMap<int, QtVariantProperty *> > m_classToIndexToProperty;
+
+    QMap<QtProperty *, bool>    m_propertyToExpanded;
+
+    QList<QtProperty *>         m_topLevelProperties;
+
+    QtAbstractPropertyBrowser    *m_browser;
+    QtVariantPropertyManager *m_manager;
+    QtVariantPropertyManager *m_readOnlyManager;
+};
+
+int ObjectControllerPrivate::enumToInt(const QMetaEnum &metaEnum, int enumValue) const
+{
+    QMap<int, int> valueMap; // dont show multiple enum values which have the same values
+    int pos = 0;
+    for (int i = 0; i < metaEnum.keyCount(); i++) {
+        int value = metaEnum.value(i);
+        if (!valueMap.contains(value)) {
+            if (value == enumValue)
+                return pos;
+            valueMap[value] = pos++;
+        }
+    }
+    return -1;
+}
+
+int ObjectControllerPrivate::intToEnum(const QMetaEnum &metaEnum, int intValue) const
+{
+    QMap<int, bool> valueMap; // dont show multiple enum values which have the same values
+    QList<int> values;
+    for (int i = 0; i < metaEnum.keyCount(); i++) {
+        int value = metaEnum.value(i);
+        if (!valueMap.contains(value)) {
+            valueMap[value] = true;
+            values.append(value);
+        }
+    }
+    if (intValue >= values.count())
+        return -1;
+    return values.at(intValue);
+}
+
+bool ObjectControllerPrivate::isSubValue(int value, int subValue) const
+{
+    if (value == subValue)
+        return true;
+    int i = 0;
+    while (subValue) {
+        if (!(value & (1 << i))) {
+            if (subValue & 1)
+                return false;
+        }
+        i++;
+        subValue = subValue >> 1;
+    }
+    return true;
+}
+
+bool ObjectControllerPrivate::isPowerOf2(int value) const
+{
+    while (value) {
+        if (value & 1) {
+            return value == 1;
+        }
+        value = value >> 1;
+    }
+    return false;
+}
+
+int ObjectControllerPrivate::flagToInt(const QMetaEnum &metaEnum, int flagValue) const
+{
+    if (!flagValue)
+        return 0;
+    int intValue = 0;
+    QMap<int, int> valueMap; // dont show multiple enum values which have the same values
+    int pos = 0;
+    for (int i = 0; i < metaEnum.keyCount(); i++) {
+        int value = metaEnum.value(i);
+        if (!valueMap.contains(value) && isPowerOf2(value)) {
+            if (isSubValue(flagValue, value))
+                intValue |= (1 << pos);
+            valueMap[value] = pos++;
+        }
+    }
+    return intValue;
+}
+
+int ObjectControllerPrivate::intToFlag(const QMetaEnum &metaEnum, int intValue) const
+{
+    QMap<int, bool> valueMap; // dont show multiple enum values which have the same values
+    QList<int> values;
+    for (int i = 0; i < metaEnum.keyCount(); i++) {
+        int value = metaEnum.value(i);
+        if (!valueMap.contains(value) && isPowerOf2(value)) {
+            valueMap[value] = true;
+            values.append(value);
+        }
+    }
+    int flagValue = 0;
+    int temp = intValue;
+    int i = 0;
+    while (temp) {
+        if (i >= values.count())
+            return -1;
+        if (temp & 1)
+            flagValue |= values.at(i);
+        i++;
+        temp = temp >> 1;
+    }
+    return flagValue;
+}
+
+void ObjectControllerPrivate::updateClassProperties(const QMetaObject *metaObject, bool recursive)
+{
+    if (!metaObject)
+        return;
+
+    if (recursive)
+        updateClassProperties(metaObject->superClass(), recursive);
+
+    QtProperty *classProperty = m_classToProperty.value(metaObject);
+    if (!classProperty)
+        return;
+
+    for (int idx = metaObject->propertyOffset(); idx < metaObject->propertyCount(); idx++) {
+        QMetaProperty metaProperty = metaObject->property(idx);
+        if (metaProperty.isReadable()) {
+            if (m_classToIndexToProperty.contains(metaObject) && m_classToIndexToProperty[metaObject].contains(idx)) {
+                QtVariantProperty *subProperty = m_classToIndexToProperty[metaObject][idx];
+                if (metaProperty.isEnumType()) {
+                    if (metaProperty.isFlagType())
+                        subProperty->setValue(flagToInt(metaProperty.enumerator(), metaProperty.read(m_object).toInt()));
+                    else
+                        subProperty->setValue(enumToInt(metaProperty.enumerator(), metaProperty.read(m_object).toInt()));
+                } else {
+                    subProperty->setValue(metaProperty.read(m_object));
+                }
+            }
+        }
+    }
+}
+
+void ObjectControllerPrivate::addClassProperties(const QMetaObject *metaObject)
+{
+    if (!metaObject)
+        return;
+
+    addClassProperties(metaObject->superClass());
+
+    QtProperty *classProperty = m_classToProperty.value(metaObject);
+    if (!classProperty) {
+        QString className = QLatin1String(metaObject->className());
+        classProperty = m_manager->addProperty(QtVariantPropertyManager::groupTypeId(), className);
+        m_classToProperty[metaObject] = classProperty;
+        m_propertyToClass[classProperty] = metaObject;
+
+        for (int idx = metaObject->propertyOffset(); idx < metaObject->propertyCount(); idx++) {
+            QMetaProperty metaProperty = metaObject->property(idx);
+            int type = metaProperty.userType();
+            QtVariantProperty *subProperty = 0;
+            if (!metaProperty.isReadable()) {
+                subProperty = m_readOnlyManager->addProperty(QVariant::String, QLatin1String(metaProperty.name()));
+                subProperty->setValue(QLatin1String("< Non Readable >"));
+            } else if (metaProperty.isEnumType()) {
+                if (metaProperty.isFlagType()) {
+                    subProperty = m_manager->addProperty(QtVariantPropertyManager::flagTypeId(), QLatin1String(metaProperty.name()));
+                    QMetaEnum metaEnum = metaProperty.enumerator();
+                    QMap<int, bool> valueMap;
+                    QStringList flagNames;
+                    for (int i = 0; i < metaEnum.keyCount(); i++) {
+                        int value = metaEnum.value(i);
+                        if (!valueMap.contains(value) && isPowerOf2(value)) {
+                            valueMap[value] = true;
+                            flagNames.append(QLatin1String(metaEnum.key(i)));
+                        }
+                    subProperty->setAttribute(QLatin1String("flagNames"), flagNames);
+                    subProperty->setValue(flagToInt(metaEnum, metaProperty.read(m_object).toInt()));
+                    }
+                } else {
+                    subProperty = m_manager->addProperty(QtVariantPropertyManager::enumTypeId(), QLatin1String(metaProperty.name()));
+                    QMetaEnum metaEnum = metaProperty.enumerator();
+                    QMap<int, bool> valueMap; // dont show multiple enum values which have the same values
+                    QStringList enumNames;
+                    for (int i = 0; i < metaEnum.keyCount(); i++) {
+                        int value = metaEnum.value(i);
+                        if (!valueMap.contains(value)) {
+                            valueMap[value] = true;
+                            enumNames.append(QLatin1String(metaEnum.key(i)));
+                        }
+                    }
+                    subProperty->setAttribute(QLatin1String("enumNames"), enumNames);
+                    subProperty->setValue(enumToInt(metaEnum, metaProperty.read(m_object).toInt()));
+                }
+            } else if (m_manager->isPropertyTypeSupported(type)) {
+                if (!metaProperty.isWritable())
+                    subProperty = m_readOnlyManager->addProperty(type, QLatin1String(metaProperty.name()) + QLatin1String(" (Non Writable)"));
+                if (!metaProperty.isDesignable())
+                    subProperty = m_readOnlyManager->addProperty(type, QLatin1String(metaProperty.name()) + QLatin1String(" (Non Designable)"));
+                else
+                    subProperty = m_manager->addProperty(type, QLatin1String(metaProperty.name()));
+                subProperty->setValue(metaProperty.read(m_object));
+            } else {
+                subProperty = m_readOnlyManager->addProperty(QVariant::String, QLatin1String(metaProperty.name()));
+                subProperty->setValue(QLatin1String("< Unknown Type >"));
+                subProperty->setEnabled(false);
+            }
+            classProperty->addSubProperty(subProperty);
+            m_propertyToIndex[subProperty] = idx;
+            m_classToIndexToProperty[metaObject][idx] = subProperty;
+        }
+    } else {
+        updateClassProperties(metaObject, false);
+    }
+
+    m_topLevelProperties.append(classProperty);
+    m_browser->addProperty(classProperty);
+}
+
+void ObjectControllerPrivate::saveExpandedState()
+{
+
+}
+
+void ObjectControllerPrivate::restoreExpandedState()
+{
+
+}
+
+void ObjectControllerPrivate::slotValueChanged(QtProperty *property, const QVariant &value)
+{
+    if (!m_propertyToIndex.contains(property))
+        return;
+
+    int idx = m_propertyToIndex.value(property);
+
+    const QMetaObject *metaObject = m_object->metaObject();
+    QMetaProperty metaProperty = metaObject->property(idx);
+    if (metaProperty.isEnumType()) {
+        if (metaProperty.isFlagType())
+            metaProperty.write(m_object, intToFlag(metaProperty.enumerator(), value.toInt()));
+        else
+            metaProperty.write(m_object, intToEnum(metaProperty.enumerator(), value.toInt()));
+    } else {
+        metaProperty.write(m_object, value);
+    }
+
+    updateClassProperties(metaObject, true);
+}
+
+///////////////////
+
+ObjectController::ObjectController(QWidget *parent)
+    : QWidget(parent)
+{
+    d_ptr = new ObjectControllerPrivate;
+    d_ptr->q_ptr = this;
+
+    d_ptr->m_object = 0;
+/*
+    QScrollArea *scroll = new QScrollArea(this);
+    scroll->setWidgetResizable(true);
+
+    d_ptr->m_browser = new QtGroupBoxPropertyBrowser(this);
+    QVBoxLayout *layout = new QVBoxLayout(this);
+    layout->setMargin(0);
+    layout->addWidget(scroll);
+    scroll->setWidget(d_ptr->m_browser);
+*/
+    QtTreePropertyBrowser *browser = new QtTreePropertyBrowser(this);
+    browser->setRootIsDecorated(false);
+    d_ptr->m_browser = browser;
+    QVBoxLayout *layout = new QVBoxLayout(this);
+    layout->setMargin(0);
+    layout->addWidget(d_ptr->m_browser);
+
+    d_ptr->m_readOnlyManager = new QtVariantPropertyManager(this);
+    d_ptr->m_manager = new QtVariantPropertyManager(this);
+    QtVariantEditorFactory *factory = new QtVariantEditorFactory(this);
+    d_ptr->m_browser->setFactoryForManager(d_ptr->m_manager, factory);
+
+    connect(d_ptr->m_manager, SIGNAL(valueChanged(QtProperty *, const QVariant &)),
+                this, SLOT(slotValueChanged(QtProperty *, const QVariant &)));
+}
+
+ObjectController::~ObjectController()
+{
+    delete d_ptr;
+}
+
+void ObjectController::setObject(QObject *object)
+{
+    if (d_ptr->m_object == object)
+        return;
+
+    if (d_ptr->m_object) {
+        d_ptr->saveExpandedState();
+        QListIterator<QtProperty *> it(d_ptr->m_topLevelProperties);
+        while (it.hasNext()) {
+            d_ptr->m_browser->removeProperty(it.next());
+        }
+        d_ptr->m_topLevelProperties.clear();
+    }
+
+    d_ptr->m_object = object;
+
+    if (!d_ptr->m_object)
+        return;
+
+    d_ptr->addClassProperties(d_ptr->m_object->metaObject());
+
+    d_ptr->restoreExpandedState();
+}
+
+QObject *ObjectController::object() const
+{
+    return d_ptr->m_object;
+}
+
+#include "moc_objectcontroller.cpp"

examples/object_controller/objectcontroller.h

@@ -0,0 +1,64 @@
+/****************************************************************************
+**
+** 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 a Qt Solutions component.
+**
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+****************************************************************************/
+
+#ifndef OBJECTCONTROLLER_H
+#define OBJECTCONTROLLER_H
+
+#include <QWidget>
+
+class ObjectControllerPrivate;
+
+class ObjectController : public QWidget
+{
+    Q_OBJECT
+public:
+    ObjectController(QWidget *parent = 0);
+    ~ObjectController();
+
+    void setObject(QObject *object);
+    QObject *object() const;
+
+private:
+    ObjectControllerPrivate *d_ptr;
+    Q_DECLARE_PRIVATE(ObjectController)
+    Q_DISABLE_COPY(ObjectController)
+    Q_PRIVATE_SLOT(d_func(), void slotValueChanged(QtProperty *, const QVariant &))
+};
+
+#endif