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Working with QSystemInfo - System Information API - Part 1

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* [http://developer.qt.nokia.com/wiki/Category:Qt_Labs_Projects Qt Mobility API]
 
* [http://developer.qt.nokia.com/wiki/Category:Qt_Labs_Projects Qt Mobility API]
 
* [http://qt.nokia.com/developer/qt-roadmap New Qt APIs Beta - Mobility Project]
 
* [http://qt.nokia.com/developer/qt-roadmap New Qt APIs Beta - Mobility Project]
* SDK help[[Category:Code Examples]]
+
* SDK help[[Category:Code Examples]][[Category:MeeGo]] [[Category:Symbian]]

Revision as of 08:54, 15 February 2012

ID Creation date 8-March-2010
Platform S60 3rd Edition, FP1, FP2

S60 5th Edition

Tested on devices Nokia 5800 xPressMusic
Category Qt for Symbian Subcategory Qt Mobility API


Keywords (APIs, classes, methods, functions): QSystemInfo, QString, QStringList, QButton


Tip.pngTip: 


Contents

Overview

This is a part 1 of the QSystemInfo API which is a part of the System Information API from Qt Mobility project.

What is covered in QSystemInfo API Part 1

  • It is a part of the System Information API.
  • This article covers information about
    • Available languages in the device
    • Current language of the device
    • Current country code of the device


Capabilities required

  • None


UI design (.ui file)

QSystemInfo-UI Part1.png


Project configuration file (.Pro file)

  • Add the Qt Mobility project configuration option in the .Pro file as shown below
CONFIG += mobility
MOBILITY += systeminfo
  • Add Qt-specific configuration options in .pro file as shown below
QT += network


Implementing QSystemInfo API

  • QSystemInfo API is a part of the QtMobility namespace. So declare the QtMobility namespace as shown below:
using namespace QtMobility;

Header file

#ifndef SYSTEMINFORMATION_H
#define SYSTEMINFORMATION_H
 
#include <QtGui/QWidget>
#include "ui_SystemInformation.h"
#include <qsysteminfo.h>
 
using namespace QtMobility;
 
class SystemInformation : public QWidget
{
Q_OBJECT
 
public:
SystemInformation(QWidget *parent = 0);
~SystemInformation();
 
public slots:
void displayCurrentCountryCode();
void displayCurrentLanguage();
void displayAvailableCountryCodes();
void resetAllFields();
 
private:
Ui::SystemInformation ui;
QSystemInfo* sysInfo;
};
 
#endif // SYSTEMINFORMATION_H


Source file

#include "SystemInformation.h"
 
SystemInformation::SystemInformation(QWidget *parent)
: QWidget(parent), sysInfo(NULL)
{
ui.setupUi(this);
sysInfo = new QSystemInfo();
 
QObject::connect(ui.curLanguageButton,
SIGNAL(clicked()),
this,
SLOT(displayCurrentLanguage()));
QObject::connect(ui.countryCodeButton,
SIGNAL(clicked()),
this,
SLOT(displayCurrentCountryCode()));
QObject::connect(ui.availableLanguagesButton,
SIGNAL(clicked()),
this,
SLOT(displayAvailableCountryCodes()));
QObject::connect(ui.resetButton,
SIGNAL(clicked()),
this,
SLOT(resetAllFields()));
}
 
SystemInformation::~SystemInformation()
{
delete sysInfo;
sysInfo = NULL;
}
 
void SystemInformation::displayCurrentCountryCode()
{
if(sysInfo)
{
QString str = sysInfo->currentCountryCode();
ui.countryCodeLabel->setText(str);
}
}
 
void SystemInformation::displayCurrentLanguage()
{
if(sysInfo)
{
QString str = sysInfo->currentLanguage();
ui.languageLabel->setText(str);
}
}
 
void SystemInformation::displayAvailableCountryCodes()
{
if(sysInfo)
{
QStringList list = sysInfo->availableLanguages();
ui.languageComboBox->addItems(list);
}
}
 
void SystemInformation::resetAllFields()
{
if(sysInfo)
{
ui.languageLabel->clear();
ui.countryCodeLabel->clear();
ui.languageComboBox->clear();
}
}


Output

QSystemInfo-part1.jpg


Useful functions

  • QStringList availableLanguages();
  • QString currentCountryCode();
  • QString currentLanguage();

Keywords

Headers

  • #include <qsysteminfo.h>

Classes

  • QSystemInfo
  • QString
  • QStringList
  • QButton

Example Application


Related articles

Reference links

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