OnBoard show and hide with Terminal

Hi,

Thanks for your interest in Onboard.

It is possible to show and hide Onboard by using the terminal. You can find examples in the README:
http://bazaar.launchpad.net/~onboard/onboard/1.3/view/head:/README

Have a nice day.

Francesco

Thanks Francesco Fumanti, that solved my question.

Thanks it solved my problem. I still have onBoard 1.2 but with the 1.3 extensions

Hi Julian,

Considering that you are running a system based on Ubuntu 16.04, you should be able to install Onboard 1.3 from our Stable PPA:
https://launchpad.net/~onboard/+archive/ubuntu/stable

Cheers,

Francesco

Hi Francesco,
I get it worked with the terminal. But now I have another problem, when I tried to call it from C#.
I write

public static void ExecuteCommand(string command)
        {
            Process proc = new System.Diagnostics.Process();
            proc.StartInfo.FileName = "/bin/bash";
            proc.StartInfo.Arguments = "-c \" " + command + " \"";
            proc.StartInfo.UseShellExecute = false;
            proc.StartInfo.RedirectStandardOutput = true;
            proc.Start();

            while (!proc.StandardOutput.EndOfStream)
            {
                Console.WriteLine(proc.StandardOutput.ReadLine());
            }
        }

int main(){
 ExecuteCommand("exec dbus-send --type=method_call --print-reply --dest=org.onboard.Onboard /org/onboard/Onboard/Keyboard org.onboard.Onboard.Keyboard.Show");
}

And then an Error appeared:

org.freedesktop.Dbus.Error.ServiceUnknown: The name org.onboard.Onboard was not provided by any .service files

Do you have any suggestions?

Best regards,

Julian

Hi marmuta,

I hope that everything is fine for you.

Could you please reply to this question? I guess that the problem is a file that is missing, but as I said, it is a guess.

Thanks in advance.

Francesco

On 2016-09-30 13:37, Julian wrote:
> Question #402422 on Onboard changed:
> https://answers.launchpad.net/onboard/+question/402422
>
> Status: Solved => Open
>
> Julian is still having a problem:
> Hi Francesco,
> I get it worked with the terminal. But now I have another problem, when I tried to call it from C#.
> I write
>
> public static void ExecuteCommand(string command)
> {
> Process proc = new System.Diagnostics.Process();
> proc.StartInfo.FileName = "/bin/bash";
> proc.StartInfo.Arguments = "-c \" " + command + " \"";
> proc.StartInfo.UseShellExecute = false;
> proc.StartInfo.RedirectStandardOutput = true;
> proc.Start();
>
> while (!proc.StandardOutput.EndOfStream)
> {
> Console.WriteLine(proc.StandardOutput.ReadLine());
> }
> }
>
> int main(){
> ExecuteCommand("exec dbus-send --type=method_call --print-reply --dest=org.onboard.Onboard /org/onboard/Onboard/Keyboard org.onboard.Onboard.Keyboard.Show");
> }
>
> And then an Error appeared:
>
> org.freedesktop.Dbus.Error.ServiceUnknown: The name org.onboard.Onboard
> was not provided by any .service files
>
> Do you have any suggestions?
>
> Best regards,
>
> Julian
>

Julian, could you provide a complete example and build instructions? I tried
mcs onboard-dbus.cs
but that fails with
onboard-dbus.cs(3,14): error CS1525: Unexpected symbol `void', expecting `class', `delegate', `enum', `interface', `partial', or `struct'

you must open it with mono. But i get the same error if I want to send this command via c++ to commandline. Maybe my Code is wrong ist there an example to open this ommands with any programming language?

> you must open it with mono
mono onboard-dbus.cs
Cannot open assembly 'onboard-dbus.cs': File does not contain a valid CIL image.

I suppose it has to be built with mcs before. I'd appreciate detailed build instructions. Sorry, I don't know much about mono. There might be a problem with the environment of that particular ExecuteCommand call, but it's hard to tell if I can't even run it.

Usually programming languages don't need to launch dbus-send, since they have more direct support of D-Bus readily available. That's the benefit of having a D-Bus interface in Onboard after all. You're supposed to be able to use it from any language of your choosing. Don't know about mono/C#, though.

Python:
file: onboard-dbus.py

import dbus

bus = dbus.SessionBus()
proxy = bus.get_object("org.onboard.Onboard", "/org/onboard/Onboard/Keyboard")
keyboard = dbus.Interface(proxy, "org.onboard.Onboard.Keyboard")
keyboard.Show()

Run:
python3 onboard-dbus.py

C++ with Qt5:
file onboard-dbus-qt5.pro:

TEMPLATE = app
TARGET = onboard-dbus-qt5
INCLUDEPATH += .
QT += dbus

# Input
SOURCES += onboard-dbus-qt.cpp

file onboard-dbus-qt.cpp:

#include <QtCore>
#include <QDBusInterface>

int main() {
    QDBusInterface iface( "org.onboard.Onboard",
                          "/org/onboard/Onboard/Keyboard",
                          "org.onboard.Onboard.Keyboard",
                          QDBusConnection::sessionBus(), 0 );
    QDBusMessage reply = iface.call( "Show" );
    return 0;
}

Build with:
export QT_SELECT=5
qmake
make

Run:
./onboard-dbus-qt5

C with GIO (GTK):

file onboard-dbus-gio.c:

#include <gio/gio.h>

int
main (int argc, char *argv[])
{
    GError *error = NULL;
    GDBusProxy *proxy = NULL;

    proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,
                                           G_DBUS_PROXY_FLAGS_NONE,
                                           NULL, /* GDBusInterfaceInfo */
                                           "org.onboard.Onboard",
                                           "/org/onboard/Onboard/Keyboard",
                                           "org.onboard.Onboard.Keyboard",
                                           NULL, /* GCancellable */
                                           &error);
    if (proxy)
    {
        g_dbus_proxy_call_sync (proxy,
                                "Show",
                                NULL,
                                G_DBUS_CALL_FLAGS_NONE,
                                -1,
                                NULL,
                                &error);
    }

    if (proxy)
      g_object_unref (proxy);
    if (error)
      g_error_free (error);

  return 0;
}

Build with:
gcc -o onboard-dbus-gio onboard-dbus-gio.c $(pkg-config --cflags --libs gtk+-3.0)

Run:
./onboard-dbus-gio

Thanks for this fast answers. I will try it Out tomorrow.

It works, thanks!

My Solution to run it in C# is. I create with Monodevelop a .so File in C. There I create a Function with the GTK C Code in it. And then I can import this C funktion in C# over this .so File. But now there is another Problem. I must run this Application as root. And then it doesn't work, cause of the Session Bus. I fixed this problem by replace "sudo *Applicationname*" with "sudo -u *username* *Applicationname*. But now there is my Question, is there another Way to manage this problem? I allready added "<allow user ="*"/> to the session.conf file in /usr/share/dbus-1, but it doesn't fix the Problem.

Do you have any suggestions?

Best regards
Julian

Don't know, sorry. I haven't tried to use a session bus as root yet. I'd imagine that would be possible somehow, but I haven't done it yet. Onboard is not prepared to be run as root, though, this much I can tell.