Qt中的屏幕锁 [英] Screen locker in Qt
本文介绍了Qt中的屏幕锁的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
Linux系统上是否有任何基于Qt的屏幕储物柜?
Are there any Qt based screen lockers on linux systems ?
即4位数字或密码的屏幕锁?
i.e. 4 pin digit or password screen locker ?
任何参考将不胜感激.
Any reference will be greatly appreciated.
推荐答案
在linux上,屏幕锁定由屏幕保护程序完成,密码是来自用户linux帐户的密码.
On linux, the screen locking is done by the screensavers, and the password is the one from the user linux account.
您可以使用QProcess运行命令行并检查是否成功:
You can use QProcess to run a command line and check if it was successful:
-
gnome-screensaver-command --lock
-
xscreensaver-command --lock
-
qdbus org.freedesktop.ScreenSaver /ScreenSaver Lock
-
qdbus org.gnome.ScreenSaver /ScreenSaver Lock
-
xlock
gnome-screensaver-command --lock
xscreensaver-command --lock
qdbus org.freedesktop.ScreenSaver /ScreenSaver Lock
qdbus org.gnome.ScreenSaver /ScreenSaver Lock
xlock
和/或使用QtDBus模块执行相同的操作
And/or use QtDBus module to do the same thing
// Tries to lock the screen and returns true if successful
bool LockScreenWithDBus() {
QDBusConnection bus = QDBusConnection::sessionBus();
if(!bus.isConnected())
return false;
QStringList services;
services << "org.freedesktop.ScreenSaver"
<< "org.gnome.ScreenSaver"
// These last two are probably not necessary, because kde uses freedesktop
// conventions for dbus
<< "org.kde.ScreenSaver"
<< "org.kde.krunner";
foreach(QString service, services) {
QDBusInterface screenSaverInterface(service, "/ScreenSaver",
QString(), bus);
if (!screenSaverInterface.isValid())
continue;
QDBusReply<void> reply = screenSaverInterface.call("Lock");
if (reply.isValid())
return true;
}
return false;
}
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