Inhibiting the device screen saver using Qt
hamishwillee
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hamishwillee
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Add the Qt Mobility project configuration option in the .pro file as shown below. | Add the Qt Mobility project configuration option in the .pro file as shown below. | ||
| − | <code cpp> | + | <code cpp-qt> |
CONFIG += mobility | CONFIG += mobility | ||
MOBILITY += systeminfo | MOBILITY += systeminfo | ||
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Add the inclusion of {{Icode|<QSystemScreenSaver>}}. | Add the inclusion of {{Icode|<QSystemScreenSaver>}}. | ||
| − | <code cpp> | + | <code cpp-qt> |
#include <QSystemScreenSaver> | #include <QSystemScreenSaver> | ||
</code> | </code> | ||
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Add the {{Icode|QSystemScreenSaver}} object as member to your {{Icode|QObject}}-derived class and set the inhibiter to active by calling the {{Icode|setScreenSaverInhibit()}} method. The inhibiter will continue to prevent the screen saver from activating as long as the {{Icode|QSystemScreenSaver}} object exists. | Add the {{Icode|QSystemScreenSaver}} object as member to your {{Icode|QObject}}-derived class and set the inhibiter to active by calling the {{Icode|setScreenSaverInhibit()}} method. The inhibiter will continue to prevent the screen saver from activating as long as the {{Icode|QSystemScreenSaver}} object exists. | ||
| − | <code cpp> | + | <code cpp-qt> |
class MyObject : public QObject | class MyObject : public QObject | ||
{ | { | ||
Revision as of 04:17, 11 October 2012
Article Metadata
Tested with
Devices(s): Nokia E7-00, N8-00, N900
Compatibility
Platform(s): Symbian
Maemo
Maemo
Article
Keywords: QSystemScreenSaver
Created: kratsan
(27 Jan 2011)
Last edited: hamishwillee
(11 Oct 2012)
Contents |
Overview
This snippet shows how to prevent the screen saver from activating in an application by using Qt Mobility's QSystemScreenSaver class.
Preconditions
Qt Mobility 1.0.2 or higher is installed.
Project configuration file (.pro) file
Add the Qt Mobility project configuration option in the .pro file as shown below.
CONFIG += mobility
MOBILITY += systeminfo
Header file
Add the inclusion of <QSystemScreenSaver>.
#include <QSystemScreenSaver>Add the QSystemScreenSaver object as member to your QObject-derived class and set the inhibiter to active by calling the setScreenSaverInhibit() method. The inhibiter will continue to prevent the screen saver from activating as long as the QSystemScreenSaver object exists.
class MyObject : public QObject
{
MyObject() {
bool success = screenSaverInhibiter.setScreenSaverInhibit();
if(success == false) {
// Failed to set the screen saver inhibiter.
// The platform may not have a default screen saver implementation
// or system policies may prevent the setting of the inhibiter.
}
}
protected:
QSystemScreenSaver screenSaverInhibiter;
};
Postconditions
The code snippet demonstrated a way to inhibit the screen saver from activating.
