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Abhijit Kundu
391
examples/object_controller/objectcontroller.cpp
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391
examples/object_controller/objectcontroller.cpp
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of a Qt Solutions component.
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**
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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****************************************************************************/
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#include <QMetaObject>
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#include <QMetaProperty>
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#include <QVBoxLayout>
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#include <QScrollArea>
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#include "objectcontroller.h"
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#include "qtvariantproperty.h"
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#include "qtgroupboxpropertybrowser.h"
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#include "qttreepropertybrowser.h"
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#include "qtpropertybrowser.h"
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class ObjectControllerPrivate
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{
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ObjectController *q_ptr;
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Q_DECLARE_PUBLIC(ObjectController)
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public:
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void addClassProperties(const QMetaObject *metaObject);
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void updateClassProperties(const QMetaObject *metaObject, bool recursive);
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void saveExpandedState();
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void restoreExpandedState();
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void slotValueChanged(QtProperty *property, const QVariant &value);
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int enumToInt(const QMetaEnum &metaEnum, int enumValue) const;
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int intToEnum(const QMetaEnum &metaEnum, int intValue) const;
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int flagToInt(const QMetaEnum &metaEnum, int flagValue) const;
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int intToFlag(const QMetaEnum &metaEnum, int intValue) const;
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bool isSubValue(int value, int subValue) const;
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bool isPowerOf2(int value) const;
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QObject *m_object;
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QMap<const QMetaObject *, QtProperty *> m_classToProperty;
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QMap<QtProperty *, const QMetaObject *> m_propertyToClass;
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QMap<QtProperty *, int> m_propertyToIndex;
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QMap<const QMetaObject *, QMap<int, QtVariantProperty *> > m_classToIndexToProperty;
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QMap<QtProperty *, bool> m_propertyToExpanded;
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QList<QtProperty *> m_topLevelProperties;
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QtAbstractPropertyBrowser *m_browser;
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QtVariantPropertyManager *m_manager;
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QtVariantPropertyManager *m_readOnlyManager;
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};
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int ObjectControllerPrivate::enumToInt(const QMetaEnum &metaEnum, int enumValue) const
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{
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QMap<int, int> valueMap; // dont show multiple enum values which have the same values
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int pos = 0;
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for (int i = 0; i < metaEnum.keyCount(); i++) {
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int value = metaEnum.value(i);
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if (!valueMap.contains(value)) {
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if (value == enumValue)
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return pos;
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valueMap[value] = pos++;
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}
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}
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return -1;
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}
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int ObjectControllerPrivate::intToEnum(const QMetaEnum &metaEnum, int intValue) const
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{
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QMap<int, bool> valueMap; // dont show multiple enum values which have the same values
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QList<int> values;
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for (int i = 0; i < metaEnum.keyCount(); i++) {
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int value = metaEnum.value(i);
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if (!valueMap.contains(value)) {
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valueMap[value] = true;
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values.append(value);
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}
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}
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if (intValue >= values.count())
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return -1;
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return values.at(intValue);
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}
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bool ObjectControllerPrivate::isSubValue(int value, int subValue) const
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{
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if (value == subValue)
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return true;
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int i = 0;
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while (subValue) {
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if (!(value & (1 << i))) {
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if (subValue & 1)
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return false;
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}
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i++;
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subValue = subValue >> 1;
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}
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return true;
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}
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bool ObjectControllerPrivate::isPowerOf2(int value) const
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{
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while (value) {
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if (value & 1) {
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return value == 1;
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}
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value = value >> 1;
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}
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return false;
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}
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int ObjectControllerPrivate::flagToInt(const QMetaEnum &metaEnum, int flagValue) const
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{
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if (!flagValue)
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return 0;
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int intValue = 0;
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QMap<int, int> valueMap; // dont show multiple enum values which have the same values
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int pos = 0;
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for (int i = 0; i < metaEnum.keyCount(); i++) {
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int value = metaEnum.value(i);
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if (!valueMap.contains(value) && isPowerOf2(value)) {
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if (isSubValue(flagValue, value))
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intValue |= (1 << pos);
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valueMap[value] = pos++;
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}
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}
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return intValue;
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}
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int ObjectControllerPrivate::intToFlag(const QMetaEnum &metaEnum, int intValue) const
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{
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QMap<int, bool> valueMap; // dont show multiple enum values which have the same values
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QList<int> values;
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for (int i = 0; i < metaEnum.keyCount(); i++) {
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int value = metaEnum.value(i);
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if (!valueMap.contains(value) && isPowerOf2(value)) {
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valueMap[value] = true;
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values.append(value);
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}
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}
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int flagValue = 0;
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int temp = intValue;
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int i = 0;
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while (temp) {
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if (i >= values.count())
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return -1;
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if (temp & 1)
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flagValue |= values.at(i);
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i++;
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temp = temp >> 1;
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}
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return flagValue;
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}
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void ObjectControllerPrivate::updateClassProperties(const QMetaObject *metaObject, bool recursive)
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{
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if (!metaObject)
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return;
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if (recursive)
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updateClassProperties(metaObject->superClass(), recursive);
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QtProperty *classProperty = m_classToProperty.value(metaObject);
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if (!classProperty)
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return;
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for (int idx = metaObject->propertyOffset(); idx < metaObject->propertyCount(); idx++) {
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QMetaProperty metaProperty = metaObject->property(idx);
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if (metaProperty.isReadable()) {
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if (m_classToIndexToProperty.contains(metaObject) && m_classToIndexToProperty[metaObject].contains(idx)) {
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QtVariantProperty *subProperty = m_classToIndexToProperty[metaObject][idx];
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if (metaProperty.isEnumType()) {
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if (metaProperty.isFlagType())
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subProperty->setValue(flagToInt(metaProperty.enumerator(), metaProperty.read(m_object).toInt()));
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else
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subProperty->setValue(enumToInt(metaProperty.enumerator(), metaProperty.read(m_object).toInt()));
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} else {
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subProperty->setValue(metaProperty.read(m_object));
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}
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}
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}
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}
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}
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void ObjectControllerPrivate::addClassProperties(const QMetaObject *metaObject)
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{
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if (!metaObject)
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return;
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addClassProperties(metaObject->superClass());
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QtProperty *classProperty = m_classToProperty.value(metaObject);
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if (!classProperty) {
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QString className = QLatin1String(metaObject->className());
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classProperty = m_manager->addProperty(QtVariantPropertyManager::groupTypeId(), className);
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m_classToProperty[metaObject] = classProperty;
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m_propertyToClass[classProperty] = metaObject;
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for (int idx = metaObject->propertyOffset(); idx < metaObject->propertyCount(); idx++) {
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QMetaProperty metaProperty = metaObject->property(idx);
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int type = metaProperty.userType();
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QtVariantProperty *subProperty = 0;
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if (!metaProperty.isReadable()) {
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subProperty = m_readOnlyManager->addProperty(QVariant::String, QLatin1String(metaProperty.name()));
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subProperty->setValue(QLatin1String("< Non Readable >"));
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} else if (metaProperty.isEnumType()) {
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if (metaProperty.isFlagType()) {
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subProperty = m_manager->addProperty(QtVariantPropertyManager::flagTypeId(), QLatin1String(metaProperty.name()));
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QMetaEnum metaEnum = metaProperty.enumerator();
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QMap<int, bool> valueMap;
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QStringList flagNames;
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for (int i = 0; i < metaEnum.keyCount(); i++) {
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int value = metaEnum.value(i);
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if (!valueMap.contains(value) && isPowerOf2(value)) {
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valueMap[value] = true;
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flagNames.append(QLatin1String(metaEnum.key(i)));
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}
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subProperty->setAttribute(QLatin1String("flagNames"), flagNames);
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subProperty->setValue(flagToInt(metaEnum, metaProperty.read(m_object).toInt()));
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}
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} else {
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subProperty = m_manager->addProperty(QtVariantPropertyManager::enumTypeId(), QLatin1String(metaProperty.name()));
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QMetaEnum metaEnum = metaProperty.enumerator();
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QMap<int, bool> valueMap; // dont show multiple enum values which have the same values
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QStringList enumNames;
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for (int i = 0; i < metaEnum.keyCount(); i++) {
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int value = metaEnum.value(i);
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if (!valueMap.contains(value)) {
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valueMap[value] = true;
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enumNames.append(QLatin1String(metaEnum.key(i)));
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}
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}
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subProperty->setAttribute(QLatin1String("enumNames"), enumNames);
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subProperty->setValue(enumToInt(metaEnum, metaProperty.read(m_object).toInt()));
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}
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} else if (m_manager->isPropertyTypeSupported(type)) {
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if (!metaProperty.isWritable())
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subProperty = m_readOnlyManager->addProperty(type, QLatin1String(metaProperty.name()) + QLatin1String(" (Non Writable)"));
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if (!metaProperty.isDesignable())
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subProperty = m_readOnlyManager->addProperty(type, QLatin1String(metaProperty.name()) + QLatin1String(" (Non Designable)"));
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else
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subProperty = m_manager->addProperty(type, QLatin1String(metaProperty.name()));
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subProperty->setValue(metaProperty.read(m_object));
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} else {
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subProperty = m_readOnlyManager->addProperty(QVariant::String, QLatin1String(metaProperty.name()));
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subProperty->setValue(QLatin1String("< Unknown Type >"));
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subProperty->setEnabled(false);
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}
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classProperty->addSubProperty(subProperty);
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m_propertyToIndex[subProperty] = idx;
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m_classToIndexToProperty[metaObject][idx] = subProperty;
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}
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} else {
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updateClassProperties(metaObject, false);
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}
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m_topLevelProperties.append(classProperty);
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m_browser->addProperty(classProperty);
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}
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void ObjectControllerPrivate::saveExpandedState()
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{
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}
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void ObjectControllerPrivate::restoreExpandedState()
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{
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}
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void ObjectControllerPrivate::slotValueChanged(QtProperty *property, const QVariant &value)
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{
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if (!m_propertyToIndex.contains(property))
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return;
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int idx = m_propertyToIndex.value(property);
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const QMetaObject *metaObject = m_object->metaObject();
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QMetaProperty metaProperty = metaObject->property(idx);
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if (metaProperty.isEnumType()) {
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if (metaProperty.isFlagType())
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metaProperty.write(m_object, intToFlag(metaProperty.enumerator(), value.toInt()));
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else
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metaProperty.write(m_object, intToEnum(metaProperty.enumerator(), value.toInt()));
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} else {
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metaProperty.write(m_object, value);
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}
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updateClassProperties(metaObject, true);
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}
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///////////////////
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ObjectController::ObjectController(QWidget *parent)
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: QWidget(parent)
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{
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d_ptr = new ObjectControllerPrivate;
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d_ptr->q_ptr = this;
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d_ptr->m_object = 0;
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/*
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QScrollArea *scroll = new QScrollArea(this);
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scroll->setWidgetResizable(true);
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d_ptr->m_browser = new QtGroupBoxPropertyBrowser(this);
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QVBoxLayout *layout = new QVBoxLayout(this);
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layout->setMargin(0);
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layout->addWidget(scroll);
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scroll->setWidget(d_ptr->m_browser);
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*/
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QtTreePropertyBrowser *browser = new QtTreePropertyBrowser(this);
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browser->setRootIsDecorated(false);
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d_ptr->m_browser = browser;
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QVBoxLayout *layout = new QVBoxLayout(this);
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layout->setMargin(0);
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layout->addWidget(d_ptr->m_browser);
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d_ptr->m_readOnlyManager = new QtVariantPropertyManager(this);
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d_ptr->m_manager = new QtVariantPropertyManager(this);
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QtVariantEditorFactory *factory = new QtVariantEditorFactory(this);
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d_ptr->m_browser->setFactoryForManager(d_ptr->m_manager, factory);
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connect(d_ptr->m_manager, SIGNAL(valueChanged(QtProperty *, const QVariant &)),
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this, SLOT(slotValueChanged(QtProperty *, const QVariant &)));
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}
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ObjectController::~ObjectController()
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{
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delete d_ptr;
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}
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void ObjectController::setObject(QObject *object)
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{
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if (d_ptr->m_object == object)
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return;
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if (d_ptr->m_object) {
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d_ptr->saveExpandedState();
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QListIterator<QtProperty *> it(d_ptr->m_topLevelProperties);
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while (it.hasNext()) {
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d_ptr->m_browser->removeProperty(it.next());
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}
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d_ptr->m_topLevelProperties.clear();
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}
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d_ptr->m_object = object;
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if (!d_ptr->m_object)
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return;
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d_ptr->addClassProperties(d_ptr->m_object->metaObject());
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d_ptr->restoreExpandedState();
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}
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QObject *ObjectController::object() const
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{
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return d_ptr->m_object;
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}
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#include "moc_objectcontroller.cpp"
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