System Information Example

Files:

The System Information example uses a tabbed dialog, with each tab representing a particular type of data: versions, network and so on.

To access the information, the example creates objects belonging to the System Information classes

QSystemDeviceInfo::ProfileDetails	Access to details of the currently active phone profile
QSystemAlignedTimer	Service for applications to synchronize their activity
QSystemBatteryInfo	Access to battery and power information from the system
QSystemDeviceInfo	Access to device information from the system
QSystemDisplayInfo	Access to display information from the system
QSystemInfo	Access to various general information from the system
QSystemNetworkInfo	Access to various networking status and signals
QSystemScreenSaver	Access to screen saver and blanking
QSystemStorageInfo	Access to disk storage information from the system

Here are some examples that show how the example application reads the device information.

The current language

     systemInfo = new QSystemInfo(this);
     curLanguageLineEdit->setText( systemInfo->currentLanguage());

Device information, starting with the battery level

 bi = new QSystemBatteryInfo(this);
     ...
 chargerTypeChanged(bi->chargerType());

 currentBatStat = bi->batteryStatus();

The battery status is an enum, QSystemBatteryInfo::BatteryStatus, that indicates various battery levels and their significance, e.g., QSystemBatteryInfo::BatteryVeryLow.

The manufacturer id and the product name

     manufacturerLabel->setText(di->manufacturer());
     ...
     productLabel->setText(di->productName());

Other information is stored as bitwise flags. The following code shows the input methods being determined using flags.

     QSystemDeviceInfo::InputMethodFlags methods = di->inputMethodType();
     QStringList inputs;
     if ((methods & QSystemDeviceInfo::Keys)=QSystemDeviceInfo::Keypad){
         inputs << "Keys";
     }
     if ((methods & QSystemDeviceInfo::Keypad)=QSystemDeviceInfo::Keypad) {
         inputs << "Keypad";
     }

Various capabilities of the device can be found by testing for features. In the example a Feature combo box, on the General tab, has a hard coded list of features. When a listed feature is selected the getFeature() function is called with the index which is handled by applying a test to the corresponding feature.

     QSystemInfo::Feature feature;
     switch(index) {
     ...
     case 1:
         feature = QSystemInfo::BluetoothFeature;
     ...
     QSystemInfo si;
     featuresLineEdit->setText((si.hasFeatureSupported(feature) ? "true":"false" ));