Qt service with gui
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@artwaw
You can "monitor" a process from a service, but I don't see how that relates to what the OP is wanting.The example for anti-virus just seems to be: the non-UI part of the AV runs as a service (with privileges), the user chooses to fire up a user-process UI which happens to communicate with it. The UI process is fully user-level, nothing special about it, so far as I know. I don't think that is what the OP is asking for. But we shall see.
@JonB That's essentially what I wanted to say about the design, yes. And that would be my advice on how to implement functionality - using two processes: a monitor and a user-space gui. Unless Windows allows service to span a privileged process that a user can't interfere with but that's not a knowledge I possess.
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@franco-amato
Not particularly, no. A lot of posters here don't, in fact probably most. And if they do they usually say so and what they came across. You asked if it is possible to show a GUI from a Windows service, and I suggested it is not, so far as I know. -
Hi,
One possible cheat is that you use a QProcess to start a new instance of your application if somebody stops it.
From a design point of view, you can forbid your user to close the application by handling the close event yourself. A starting point might be the QSystemTrayIcon example.
Note that this does not protect your application from getting killed but you can still handle the usual interruption signals.
The system service + client application combo is still worth exploring as you can have the service providing the core functionality and the application being merely a front-end.Interested in AI ? www.idiap.ch
Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct -
@JonB no is not what I asked. You should re read my first post.
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@franco-amato said in Qt service with gui:
You should re read my first post.
I have read it many times, thanks. Best of luck showing a UI from a Windows service.
@JonB said in Qt service with gui:
@franco-amato said in Qt service with gui:
You should re read my first post.
I have read it many times, thanks. Best of luck showing a UI from a Windows service.
If you had read it you would have seen that I stated the following: "I know that a Windows service usually doesn't have a GUI and I'm not sure it can have one". What I asked is whether the path of service is the right path or if there are other solutions to achieve my need
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@JonB said in Qt service with gui:
@franco-amato said in Qt service with gui:
You should re read my first post.
I have read it many times, thanks. Best of luck showing a UI from a Windows service.
If you had read it you would have seen that I stated the following: "I know that a Windows service usually doesn't have a GUI and I'm not sure it can have one". What I asked is whether the path of service is the right path or if there are other solutions to achieve my need
@franco-amato said in Qt service with gui:
If you had read it
Thanks again. It's always nice to try to help people, just what we like to hear.
I read your post carefully, as I said. All I ever answered was that I think you will find it difficult to run a UI from a service. You asked if that was the "right path", I suggested it is not. Sorry if you didn't want to hear that. Why don't you leave me out now, thanks.
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Hi,
One possible cheat is that you use a QProcess to start a new instance of your application if somebody stops it.
From a design point of view, you can forbid your user to close the application by handling the close event yourself. A starting point might be the QSystemTrayIcon example.
Note that this does not protect your application from getting killed but you can still handle the usual interruption signals.
The system service + client application combo is still worth exploring as you can have the service providing the core functionality and the application being merely a front-end.@SGaist Can you help with a small example regarding this "One possible cheat is that you use a QProcess to start a new instance of your application if somebody stops it." ?
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// rest of the code int result = app.exec(); QProcess::startDetached("your_application"); return result;Interested in AI ? www.idiap.ch
Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct -
// rest of the code int result = app.exec(); QProcess::startDetached("your_application"); return result;@SGaist said in Qt service with gui:
// rest of the code int result = app.exec(); QProcess::startDetached("your_application"); return result;It worked but now I am not able to stop it anymore :)) and I am the admin
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You will have to implement some checks to determine who stopped the application.
Note that you also need to implement graceful shutdown for when you stop/restart your machine.
Interested in AI ? www.idiap.ch
Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct -
You will have to implement some checks to determine who stopped the application.
Note that you also need to implement graceful shutdown for when you stop/restart your machine.
@SGaist said in Qt service with gui:
You will have to implement some checks to determine who stopped the application.
Note that you also need to implement graceful shutdown for when you stop/restart your machine.
It's not clear what you mean with graceful shutdown. Can you give an example please?
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Simply when you want to shutdown or reboot the machine for example when applying security fixes, kernel update, system updates, etc.
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@franco.amato Will you be able to make QT service with GUI or launch QT app with GUI from Qt service?
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Yes I am
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If you want to prevent that a user to close you app you shoud:
- implement the closeEvent() event to reply "no".
- work with machine criteria to disable task manager etc to normal users.
Hi, if you want to try to use your app (with gui) as windows service you can use this.
https://www.denisgottardello.it/InstallAsService/index.php
The gui will not be visible.
