Any way to detect usb device and print his path in QML?

[filipdns]

Hello,

I'm looking to make mediaplayer in QML with QT5.11 on windows 10 and I would like to have any new usb device detecting and autoload all included mp3 in a list.

Do you know any way to detect USB device?

Thank you for your help

[SGaist]

Hi,

One possibility could be to use KDE’s Solid API.

[filipdns]

@SGaist Hi,

I try that but I not able to build this, cmake request modules ECM and on the KDE documentation, I understand almost nothing, they send me to link then an other and an other... nothing work following what they say...

[Diracsbracket]

@filipdns
This builds just fine, even on my Win10 system with Visual Studio 2017 and Qt 5.11.0. I just had to separately build two dependencies. Using CMake-gui, they are easy to configure: you must set a few variables for paths/files CMake cannot find; CMake-gui makes the process almost self-explaining.

ECM:
https://github.com/KDE/extra-cmake-modules

Flex/Bison:
https://sourceforge.net/projects/winflexbison/
For this one, I added the path of the build dir (containing both win_flex.exe and win_bison.exe) to my system path so that CMake can find them.

If it is that easy on Windows using VS2017, it must be even easier using MinGw or on Linux.

Mind you, I haven't tried using the lib yet. Hopefully, you will post about how you used it.

[filipdns]

@Diracsbracket Thanks a lot.

Finaly I success to build it but still not able to use it yet.

I make small test to try:

First problem, I can not put QT += Solid on pro file because it return error:

:-1: erreur : LNK1181: cannot open input file 'Files.obj'

I try without with qml below:

import QtQuick 2.11
import QtQuick.Layouts 1.3
import QtQuick.Controls 2.1
import QtQuick.Controls.Styles 1.1
import QtQuick.Extras 1.4
import QtQuick.Controls 1.4
import QtQuick.LocalStorage 2.0
import QtQuick.Window 2.3
import QtQml 2.11
import QtQml.Models 2.11
import org.kde.solid 1.0 as Solid

Window {
    visible: true
    width: 640
    height: 480
    Rectangle{
        height:200
        width:200

        Solid.Devices {
            id: allDevices
            onDeviceAdded: console.log(allDevices.count)
            onCountChanged: {console.log(allDevices.count);number.text=allDevices.count}
            onDeviceRemoved: console.log(allDevices.count)
        }

        Text {
            id:number
            color:"black"
            text: allDevices.count
        }
    }
}

I got 13 display.

with insert usb device, no signal, then nothing is return by the first part of the qml and the number display dosn't change.:

        Solid.Devices {
            id: allDevices
            onDeviceAdded: console.log(allDevices.count)
            onCountChanged: {console.log(allDevices.count);number.text=allDevices.count}
            onDeviceRemoved: console.log(allDevices.count)
        }

but re-run the application, I got 15 display, and remove this device again and run again, I have again 13 display, then allDevices.count is working...

So if you have more informations about Solid on .pro problem and about the signals problem, I will be happy to be informed ;-)

best regards
Philippe

[Diracsbracket]

@filipdns
I tried on both Windows 10 and Linux. Although the plugin builds,
it just doesn't work as advertised, even for the simplest of examples.
Too bad...

[filipdns]

@Diracsbracket said in Any way to detect usb device and print his path in QML?:
Yes too bad.. I stay with my problem then... :..(

[Diracsbracket]

@filipdns
From
https://stackoverflow.com/questions/29414329/is-there-a-qt-solution-for-detecting-usb-events-insertion-and-removal
I just tried this one: it seems to work!
https://github.com/wang-bin/qdevicewatcher
You should be able to wrap it inside a QML class or pass it to the QML context.

[filipdns]

@Diracsbracket Thank you very much.

I will check that tomorrow.

Just in case and save time, do you know how I have to write the main.cpp with this qdevicewatcher to be able to receive the device path and the add and remove string to my qml?

It's very small part of my project and if I can do not lost time for that it can be nice if you know what I mean ;-)

Kind regards
Philippe

[Diracsbracket]

@filipdns said in Any way to detect usb device and print his path in QML?:

It's very small part of my project and if I can do not lost time for that it can be nice if you know what I mean ;-)

Sorry, I cannot spend more time on that either. But I'm sure you will find it very quickly. Tomorrow.
It's not that difficult.

Good luck.
Paul

[filipdns]

@Diracsbracket Hello, I understand, thank you for your help.

Philippe

[Pablo J. Rogina]

@filipdns if your issue is solved please don't forget to mark your post as such. Thanks

[filipdns]

@Pablo-J.-Rogina hello, that is not the case, I still trying to found solution.

Kind regards
Philippe

[Diracsbracket]

@filipdns said in Any way to detect usb device and print his path in QML?:

that is not the case,

Does QDeviceWatcher not work? On my system, it correctly detects insertions and removals but maybe the ID's are not correctly reported as is.

[filipdns]

@Diracsbracket hello, it probably working but I didn't understand how I have to work with yet...

[filipdns]

@Diracsbracket About Id I don't need it, I need only to have drive path display in qml text... but in c++ I very beginner