[maemo-developers] How to get a program window into the task/window switcher?

[From: Martin Wegner]

Hello Faheem,

thank you so much for your detailed "manual" :)

I got xprop from here:

deb http://austinche.name/maemo/ bora/

But libxmuu1 is required for the xprop installation, so I got libxmuu1
from here:

deb http://repository.maemo.org/ chinook free non-free

Now I started xprop via SSH and the StartupWMClass is
"sun-awt-X11-XFramePeer" and I wrote this file:

[Desktop Entry]
Encoding=UTF-8
Version=1.0
Type=Application
Name=SmartHome GUI
Exec=/home/user/run.sh
StartupWMClass=sun-awt-X11-XFramePeer

When I start my application than I have my application in the
tast/window switcher :)

I ask me why a simple desktop file, which is only a shortcut in my eyes,
brings my application into the task/window switcher although I DO NOT
start my applicaton by clicking on the shortcut... I start my
application by hand in the terminal and it is also in the task/window
switcher :D Can you explain this "feature", please :) ?

Greatings, Martin



Faheem Pervez schrieb:
> From: *Faheem Pervez* <trippin1 at gmail.com <mailto:trippin1 at gmail.com>>
> Date: Mon, Apr 27, 2009 at 4:00 PM
> Subject: Re: How to get a program window into the task/window switcher?
> To: Martin Wegner <martinator.de <http://martinator.de>@arcor.de
> <http://arcor.de>>
>
>
> Hello,
>
> Here's a SDL example:
>
> Building and running http://olofson.net/download/parallax-2.tar.gz and
> pressing home only shows me the terminal I started it with:
> http://i42.tinypic.com/124wyub.png
>
> <sdlonly>
> For SDL (and SDL only) , you have to add a
> "putenv("SDL_VIDEO_X11_WMCLASS=app");" because SDL under Maemo seems
> to report the same WMCLASS for every SDL app.
> So I've added "putenv("SDL_VIDEO_X11_WMCLASS=parallax");" above
> "SDL_Init(SDL_INIT_VIDEO);" and this forces the WMCLASS of this app to
> be parallax. Other apps usually have a correct WMClass.
> </sdlonly>
>
> Now, if I start the SDL demo on the N800 and run xprop over SSH and
> tap on my window, I get the following output:
> http://pastebin.com/mc90995a
>
> I do not know where a packaged version of xprop is available for
> diablo - I compiled my binary on the tablet.
>
> Looking at the highlighted line in the pastebin output, the WMCLASS is
> parallax (ignore the second "parallax" in quotes - the first pair of
> quotes is the value needed).
>
> Now, the next step is to make a desktop file. I've saved this file as
> /usr/share/applications/hildon/parallax2.desktop. Here is the one I've
> quickly made for parallax:
> http://pastebin.com/m66ba244f
>
> Notice that the argument given to StartupWMClass is the same as the
> WMClass output given from xprop.
>
> And, lo and behold, I get my icon shown:
> http://i39.tinypic.com/avllrn.png
>
> (Ignore that the window title is shown as unknown - this is something
> specific to SDL under Maemo)
>
> Some hints regarding the desktop file:
>
>     * The Name field you will want to name properly as it's the name
>       shown in the application menu and it's also shown when you tap
>       and hold on the application's entry in the application switcher
>       on the left.
>     * If you have no intention of running it from the menu, you can
>       remove the Exec field and add NoDisplay=true to the desktop
>       file. As long as the desktop file is there, the icon will still
>       show regardless of not having an exec field and it will still
>       show even if you choose not to display the desktop file entry in
>       the application manager.
>
> Best Regards :),
> Faheem
>
>
> On Sun, Apr 26, 2009 at 5:10 PM, Martin Wegner <martinator.de
> <http://martinator.de>@arcor.de <http://arcor.de>> wrote:
>
>     Hello,
>
>     thank you for your answer :)
>
>     But I must admit you that I don't understand your recommendation
>     :( Can
>     you make a little example, please?
>
>     Thank you so much!
>
>     Greatings, Martin
>
>     Faheem Pervez schrieb:
>     > You can use xprop to get the WMClass of the application and make a
>     > desktop file and add the WMClass given to the StartupWMClass
>     argument
>     > in the desktop file. It's done with SDL apps and some Xlib apps
>     to get
>     > the icon shown.
>     >
>     > BR
>     >
>     > On Sat, Apr 25, 2009 at 4:35 PM, Martin Wegner <martinator.de
>     <http://martinator.de>
>     > <http://martinator.de>@arcor.de <http://arcor.de>
>     <http://arcor.de>> wrote:
>     >
>     >     Hello,
>     >
>     >     my Java AWT/Swing programs don't appear in the task/window
>     >     switcher when
>     >     I use openjdk-6-cacao-jre from the Jalimo project. I have
>     the same
>     >     problem when I use Sun Java SE for Embedded 6u10 headful
>     version.
>     >
>     >     Is there a way to put a program window into the task/window
>     switcher?
>     >
>     >     Thank you for your help!
>     >
>     >     Greatings, Martin
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>
>
>
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