servicebrowser.cpp Example File
servicebrowser/servicebrowser.cpp
#include <QtGui>
#include <qservicemanager.h>
#include <qserviceinterfacedescriptor.h>
#include "servicebrowser.h"
Q_DECLARE_METATYPE(QServiceInterfaceDescriptor)
ServiceBrowser::ServiceBrowser(QWidget *parent, Qt::WindowFlags flags)
: QWidget(parent, flags)
{
serviceManager = new QServiceManager(this);
systemManager = new QServiceManager(QService::SystemScope);
registerExampleServices();
initWidgets();
reloadServicesList();
setWindowTitle(tr("Services Browser"));
}
ServiceBrowser::~ServiceBrowser()
{
unregisterExampleServices();
}
void ServiceBrowser::currentInterfaceImplChanged(QListWidgetItem *current, QListWidgetItem *previous)
{
Q_UNUSED(previous);
if (!current)
return;
reloadAttributesList();
reloadAttributesRadioButtonText();
QServiceInterfaceDescriptor descriptor = current->data(Qt::UserRole).value<QServiceInterfaceDescriptor>();
if (descriptor.isValid()) {
#if defined(Q_WS_MAEMO_5)
defaultInterfaceButton->setText(tr("Set as default implementation for \n%1").arg(descriptor.interfaceName()));
#else
defaultInterfaceButton->setText(tr("Set as default implementation for %1").arg(descriptor.interfaceName()));
#endif
defaultInterfaceButton->setEnabled(true);
}
}
void ServiceBrowser::reloadServicesList()
{
servicesListWidget->clear();
QSet<QString> services;
QList<QServiceInterfaceDescriptor> descriptors = serviceManager->findInterfaces();
for (int i=0; i<descriptors.count(); i++) {
QString service = descriptors[i].serviceName();
if (descriptors[i].scope() == QService::SystemScope)
service += tr(" (system)");
services << service;
}
foreach (const QString& service, services)
servicesListWidget->addItem(service);
servicesListWidget->sortItems();
servicesListWidget->addItem(showAllServicesItem);
}
void ServiceBrowser::reloadInterfaceImplementationsList()
{
QString serviceName;
if (servicesListWidget->currentItem()
&& servicesListWidget->currentItem() != showAllServicesItem) {
serviceName = servicesListWidget->currentItem()->text();
interfacesGroup->setTitle(tr("Interfaces implemented by %1").arg(serviceName));
} else {
interfacesGroup->setTitle(tr("All interface implementations"));
}
QServiceManager *manager = serviceManager;
if (serviceName.endsWith(" (system)")) {
serviceName.chop(9);
manager = systemManager;
}
QList<QServiceInterfaceDescriptor> descriptors = manager->findInterfaces(serviceName);
attributesListWidget->clear();
interfacesListWidget->clear();
for (int i=0; i<descriptors.count(); i++) {
if (descriptors[i].scope() != manager->scope() && !serviceName.isEmpty())
continue;
QString text = QString("%1 %2.%3")
.arg(descriptors[i].interfaceName())
.arg(descriptors[i].majorVersion())
.arg(descriptors[i].minorVersion());
QServiceInterfaceDescriptor defaultInterfaceImpl
= manager->interfaceDefault(descriptors[i].interfaceName());
if (serviceName.isEmpty()) {
text += " (" + descriptors[i].serviceName() + ")";
if (descriptors[i].scope() == QService::SystemScope) {
text += tr(" (system");
defaultInterfaceImpl = systemManager->interfaceDefault(descriptors[i].interfaceName());
if (descriptors[i] == defaultInterfaceImpl)
text += tr(" default)");
else
text += ")";
defaultInterfaceImpl = QServiceInterfaceDescriptor();
}
}
if (descriptors[i] == defaultInterfaceImpl)
text += tr(" (default)");
QListWidgetItem *item = new QListWidgetItem(text);
item->setData(Qt::UserRole, qVariantFromValue(descriptors[i]));
interfacesListWidget->addItem(item);
}
defaultInterfaceButton->setEnabled(false);
}
void ServiceBrowser::reloadAttributesList()
{
QListWidgetItem *item = interfacesListWidget->currentItem();
if (!item)
return;
QServiceInterfaceDescriptor selectedImpl =
item->data(Qt::UserRole).value<QServiceInterfaceDescriptor>();
QObject *implementationRef;
if (selectedImplRadioButton->isChecked())
implementationRef = serviceManager->loadInterface(selectedImpl, 0, 0);
else
implementationRef = serviceManager->loadInterface(selectedImpl.interfaceName(), 0, 0);
attributesListWidget->clear();
if (!implementationRef) {
attributesListWidget->addItem(tr("(Error loading service plugin)"));
return;
}
const QMetaObject *metaObject = implementationRef->metaObject();
attributesGroup->setTitle(tr("Invokable attributes for %1 class")
.arg(QString(metaObject->className())));
for (int i=0; i<metaObject->methodCount(); i++) {
QMetaMethod method = metaObject->method(i);
attributesListWidget->addItem("[METHOD] " + QString(method.signature()));
}
for (int i=0; i<metaObject->propertyCount(); i++) {
QMetaProperty property = metaObject->property(i);
attributesListWidget->addItem("[PROPERTY] " + QString(property.name()));
}
}
void ServiceBrowser::setDefaultInterfaceImplementation()
{
QListWidgetItem *item = interfacesListWidget->currentItem();
if (!item)
return;
QServiceInterfaceDescriptor descriptor = item->data(Qt::UserRole).value<QServiceInterfaceDescriptor>();
if (descriptor.isValid()) {
QServiceManager *manager = serviceManager;
if (descriptor.scope() == QService::SystemScope)
manager = systemManager;
if (manager->setInterfaceDefault(descriptor)) {
int currentIndex = interfacesListWidget->row(item);
reloadInterfaceImplementationsList();
interfacesListWidget->setCurrentRow(currentIndex);
} else {
qWarning() << "Unable to set default service for interface:"
<< descriptor.interfaceName();
}
}
}
void ServiceBrowser::registerExampleServices()
{
QStringList exampleXmlFiles;
exampleXmlFiles << "filemanagerservice.xml" << "bluetoothtransferservice.xml" << "notesmanagerservice.xml";
foreach (const QString &fileName, exampleXmlFiles) {
const QString path = QCoreApplication::applicationDirPath() + "/xmldata/" + fileName;
serviceManager->addService(path);
}
}
void ServiceBrowser::unregisterExampleServices()
{
serviceManager->removeService("FileManagerService");
serviceManager->removeService("BluetoothTransferService");
serviceManager->removeService("NotesManagerService");
}
void ServiceBrowser::reloadAttributesRadioButtonText()
{
QListWidgetItem *item = interfacesListWidget->currentItem();
if (!item)
return;
QServiceInterfaceDescriptor selectedImpl =
item->data(Qt::UserRole).value<QServiceInterfaceDescriptor>();
QServiceInterfaceDescriptor defaultImpl =
serviceManager->interfaceDefault(selectedImpl.interfaceName());
defaultImplRadioButton->setText(tr("Default implementation for %1\n(currently provided by %2)")
.arg(defaultImpl.interfaceName())
.arg(defaultImpl.serviceName()));
}
void ServiceBrowser::initWidgets()
{
showAllServicesItem = new QListWidgetItem(tr("(All registered services)"));
servicesListWidget = new QListWidget;
interfacesListWidget = new QListWidget;
interfacesListWidget->addItem(tr("(Select a service)"));
attributesListWidget = new QListWidget;
attributesListWidget->addItem(tr("(Select an interface implementation)"));
#if !defined(Q_OS_SYMBIAN) && !defined(Q_WS_MAEMO_5)
interfacesListWidget->setMinimumWidth(450);
#endif
connect(servicesListWidget, SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)),
this, SLOT(reloadInterfaceImplementationsList()));
connect(interfacesListWidget, SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)),
this, SLOT(currentInterfaceImplChanged(QListWidgetItem*,QListWidgetItem*)));
defaultInterfaceButton = new QPushButton(tr("Set as default implementation"));
defaultInterfaceButton->setEnabled(false);
connect(defaultInterfaceButton, SIGNAL(clicked()),
this, SLOT(setDefaultInterfaceImplementation()));
selectedImplRadioButton = new QRadioButton(tr("Selected interface implementation"));
defaultImplRadioButton = new QRadioButton(tr("Default implementation"));
selectedImplRadioButton->setChecked(true);
QButtonGroup *radioButtons = new QButtonGroup(this);
radioButtons->addButton(selectedImplRadioButton);
radioButtons->addButton(defaultImplRadioButton);
connect(radioButtons, SIGNAL(buttonClicked(QAbstractButton*)),
this, SLOT(reloadAttributesList()));
QGroupBox *servicesGroup = new QGroupBox(tr("Show services for:"));
QVBoxLayout *servicesLayout = new QVBoxLayout;
servicesLayout->addWidget(servicesListWidget);
servicesGroup->setLayout(servicesLayout);
interfacesGroup = new QGroupBox(tr("Interface implementations"));
QVBoxLayout *interfacesLayout = new QVBoxLayout;
interfacesLayout->addWidget(interfacesListWidget);
interfacesLayout->addWidget(defaultInterfaceButton);
interfacesGroup->setLayout(interfacesLayout);
attributesGroup = new QGroupBox(tr("Invokable attributes"));
QVBoxLayout *attributesLayout = new QVBoxLayout;
attributesLayout->addWidget(attributesListWidget);
#if !defined(Q_WS_MAEMO_5)
attributesLayout->addWidget(new QLabel(tr("Show attributes for:")));
#endif
attributesLayout->addWidget(selectedImplRadioButton);
attributesLayout->addWidget(defaultImplRadioButton);
attributesGroup->setLayout(attributesLayout);
#if defined(Q_WS_MAEMO_5)
int spacingHack = QFontMetrics(QFont()).height();
interfacesLayout->setContentsMargins(0, spacingHack, 0, 0);
attributesLayout->setContentsMargins(0, spacingHack, 0, 0);
servicesLayout->setContentsMargins(0, spacingHack, 0, 0);
#endif
#if !defined(Q_OS_SYMBIAN) && !defined(Q_WS_MAEMO_5)
QGridLayout *layout = new QGridLayout;
layout->addWidget(servicesGroup, 0, 0);
layout->addWidget(attributesGroup, 0, 1, 2, 1);
layout->addWidget(interfacesGroup, 1, 0);
#else
QVBoxLayout *layout = new QVBoxLayout;
QStackedLayout *stackedLayout = new QStackedLayout;
stackedLayout->addWidget(servicesGroup);
stackedLayout->addWidget(interfacesGroup);
stackedLayout->addWidget(attributesGroup);
QComboBox *pageComboBox = new QComboBox;
pageComboBox->addItem(tr("Services"));
pageComboBox->addItem(tr("Interfaces"));
pageComboBox->addItem(tr("Attributes"));
connect(pageComboBox, SIGNAL(activated(int)),
stackedLayout, SLOT(setCurrentIndex(int)));
layout->addWidget(pageComboBox);
layout->addLayout(stackedLayout);
#endif
setLayout(layout);
}
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