System Information Example

Files:

• sysinfo/dialog.cpp
• sysinfo/dialog.h
• sysinfo/dialog.ui
• sysinfo/dialog_landscape.ui
• sysinfo/dialog_s60.ui
• sysinfo/dialog_small_landscape.ui
• sysinfo/main.cpp
• sysinfo/examples.qrc
• sysinfo/sysinfo.pro

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

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

     di = new QSystemDeviceInfo(this);
     ...
     int level = di->batteryLevel();
     batteryLevelBar->setValue(level);
     lcdNumber->display(level);

The manufacturer id and the product name

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

And there are signals that can be used to update progress bars and other indicators. An example is when the battery level changes, the batteryLevelChanged() signal is emitted

     connect(di,SIGNAL(batteryLevelChanged(int)),
             this,SLOT(updateBatteryStatus(int)));

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)){
         inputs << "Keys";
     }
     if((methods & 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" ));