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Working with QSystemStorageInfo - System Information API

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[[Category:Qt Mobility]]
+
{{ArticleMetaData
 +
|sourcecode=[[Media:SystemStorageInfo.zip]]
 +
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
 +
|devices= <!-- Devices tested against - e.g. ''devices=Nokia 6131 NFC, Nokia C7-00'') -->
 +
|sdk= <!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
 +
|platform= <!-- Compatible platforms - e.g. Symbian^1 and later, Qt 4.6 and later -->
 +
|devicecompatability= <!-- Compatible devices e.g.: All* (must have internal GPS) -->
 +
|dependencies= <!-- Any other/external dependencies e.g.: Google Maps Api v1.0 -->
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|signing=<!-- Signing requirements - empty or one of: Self-Signed, DevCert, Manufacturer -->
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|capabilities=<!-- Capabilities required by the article/code example (e.g. Location, NetworkServices. -->
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|keywords= <!-- APIs, classes and methods (e.g. QSystemScreenSaver, QList, CBase -->
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|id= <!-- Article Id (Knowledge base articles only) -->
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|language=<!-- Language category code for non-English topics - e.g. Lang-Chinese -->
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|review-by=<!-- After re-review: [[User:username]] -->
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|review-timestamp=<!-- After re-review: YYYYMMDD -->
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|update-by=<!-- After significant update: [[User:username]]-->
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|update-timestamp=<!-- After significant update: YYYYMMDD -->
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|creationdate=20100310
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|author=[[User:Kiran10182]]
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}}[[Category:Qt Mobility]]
 
{|style="background:#eceff2" width="660px" border="1" cellpadding="5" cellspacing="0"  
 
{|style="background:#eceff2" width="660px" border="1" cellpadding="5" cellspacing="0"  
 
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Revision as of 09:03, 28 October 2011

Article Metadata
Code ExampleCompatibility
Platform(s):
Symbian
Article
Created: kiran10182 (10 Mar 2010)
Last edited: hamishwillee (28 Oct 2011)
ID Creation date 9-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): QSystemStorageInfo, QString, QStringList, QButton, QLabel, QComboBox


Tip.pngTip: 


Contents

Overview

This article shows how to use QSystemStorageInfo API which is a part of the System Information API from Qt Mobility project.


What is covered in QSystemStorageInfo API

  • It is a part of the System Information API.
  • This article covers information about
    • Available drives of the device
    • Available disc space of the particular drive
    • Total disc space of the particular drive
    • Type of the particular drive


Capabilities required

  • None


UI design (.ui file)

QSystemStorageInfo UI.png


Project configuration file (.Pro file)

  • Add the Qt Mobility project configuration option in the .Pro file as shown below
CONFIG += mobility
MOBILITY += systeminfo

Implementing QSystemStorageInfo API

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

Header file

#ifndef SYSTEMSTORAGEINFO_H
#define SYSTEMSTORAGEINFO_H
 
#include <QtGui/QWidget>
#include "ui_SystemStorageInfo.h"
#include <qsysteminfo.h>
 
using namespace QtMobility;
class SystemStorageInfo : public QWidget
{
Q_OBJECT
 
public:
SystemStorageInfo(QWidget *parent = 0);
~SystemStorageInfo();
 
public slots:
void listLogicalDrives();
void listDriveInformation(int aDriveIndex);
void resetAllFields();
 
private:
Ui::SystemStorageInfo ui;
QSystemStorageInfo* storageInfo;
};
 
#endif // SYSTEMSTORAGEINFO_H


Source file

#include "SystemStorageInfo.h"
 
SystemStorageInfo::SystemStorageInfo(QWidget *parent)
: QWidget(parent), storageInfo(NULL)
{
ui.setupUi(this);
 
storageInfo = new QSystemStorageInfo();
 
QObject::connect(ui.driveComboBox,
SIGNAL(currentIndexChanged(int)),
this,
SLOT(listDriveInformation(int)));
QObject::connect(ui.storageInfoButton,
SIGNAL(clicked()),
this,
SLOT(listLogicalDrives()));
QObject::connect(ui.resetButton,
SIGNAL(clicked()),
this,
SLOT(resetAllFields()));
}
 
SystemStorageInfo::~SystemStorageInfo()
{
delete storageInfo;
}
 
void SystemStorageInfo::listLogicalDrives()
{
if(ui.driveComboBox->count() > 1)
{
//this has been called previously and combo box contains data already
ui.driveComboBox->showPopup();
return;
}
QStringList list = storageInfo->logicalDrives();
ui.driveComboBox->addItems(list);
ui.driveComboBox->showPopup();
}
 
void SystemStorageInfo::listDriveInformation(int aDriveIndex)
{
if(aDriveIndex == 0)
{
resetAllFields();
return;
}
// Set available disc space label
QString textValue = ui.driveComboBox->itemText(aDriveIndex);
qlonglong availableSpace = storageInfo->availableDiskSpace(textValue);
QString str = QString::number(availableSpace);
ui.availabelDiscSpaceLabel->setText(str);
 
// Set total disc space label
qlonglong totalSpace = storageInfo->totalDiskSpace(textValue);
str = QString::number(totalSpace);
ui.totalDiscSpaceLabel->setText(str);
 
// Set drive type label
QString labelValue;
QSystemStorageInfo::DriveType drvType = storageInfo->typeForDrive(textValue);
switch(drvType)
{
case QSystemStorageInfo::NoDrive:
{
labelValue = ("No drive");
break;
}
case QSystemStorageInfo::InternalDrive:
{
labelValue = ("Internal Drive");
break;
}
case QSystemStorageInfo::RemovableDrive:
{
labelValue = ("Removable Drive");
break;
}
case QSystemStorageInfo::RemoteDrive:
{
labelValue = ("Remote Drive");
break;
}
case QSystemStorageInfo::CdromDrive:
{
labelValue = ("CD ROM Drive");
break;
}
default:
{
break;
}
}
ui.driveTypeLabel->setText(labelValue);
}
 
void SystemStorageInfo::resetAllFields()
{
ui.driveComboBox->setCurrentIndex(0);
ui.availabelDiscSpaceLabel->clear();
ui.totalDiscSpaceLabel->clear();
ui.driveTypeLabel->clear();
}

Output

QSystemStorageInfo device.jpg


Useful functions

  • QStringList logicalDrives ();
  • qlonglong availableDiskSpace ( const QString & volumeDrive );
  • qlonglong totalDiskSpace ( const QString & volumeDrive );
  • QSystemStorageInfo::DriveType typeForDrive ( const QString & driveVolume );

Keywords

Headers

  • #include <qsysteminfo.h>

Classes

  • QSystemStorageInfo
  • QString
  • QStringList
  • QButton
  • QLabel
  • QComboBox


Example Application


Related articles

Reference links

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