Re: Convert png inline into a gdk-pixbuf?
On Thu, Jul 09, 2009 at 08:46:39AM +0200, Till Harbaum wrote: > How can i decode a png image stored in a memory buffer into a gdk-pixmap > without > saving it in a file during that process? Create a GdkPixbufLoader with gdk_pixbuf_loader_new_with_type(), pass the data with gdk_pixbuf_loader_write(), finish with gdk_pixbuf_loader_close(), get the pixbuf with gdk_pixbuf_loader_get_pixbuf(), clean-up. Yeti ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Re: Convert png inline into a gdk-pixbuf?
Hi, works like a charm, thanks! Till - original Nachricht Betreff: Re: Convert png inline into a gdk-pixbuf? Gesendet: Do, 09. Jul 2009 Von: David NeÄas > On Thu, Jul 09, 2009 at 08:46:39AM +0200, Till Harbaum wrote: > > How can i decode a png image stored in a memory buffer into a gdk-pixmap > without > > saving it in a file during that process? > > Create a GdkPixbufLoader with gdk_pixbuf_loader_new_with_type(), pass > the data with gdk_pixbuf_loader_write(), finish with > gdk_pixbuf_loader_close(), get the pixbuf with > gdk_pixbuf_loader_get_pixbuf(), clean-up. > > Yeti > > --- original Nachricht Ende ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Re: Convert png inline into a gdk-pixbuf?
Hi, one more question, please. Regarding your "clean-up". If i want to continue to use the pixbuf but not the loader i do: g_object_ref(pixbuf); g_object_unref(loader); Does this look good to you? Till - original Nachricht Betreff: Re: Convert png inline into a gdk-pixbuf? Gesendet: Do, 09. Jul 2009 Von: David NeÄas > On Thu, Jul 09, 2009 at 08:46:39AM +0200, Till Harbaum wrote: > > How can i decode a png image stored in a memory buffer into a gdk-pixmap > without > > saving it in a file during that process? > > Create a GdkPixbufLoader with gdk_pixbuf_loader_new_with_type(), pass > the data with gdk_pixbuf_loader_write(), finish with > gdk_pixbuf_loader_close(), get the pixbuf with > gdk_pixbuf_loader_get_pixbuf(), clean-up. > > Yeti > > --- original Nachricht Ende ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Convert png inline into a gdk-pixbuf?
On Thu, Jul 09, 2009 at 10:56:44AM +0200, Till Harbaum wrote: > one more question, please. Regarding your "clean-up". If i want to > continue to use the pixbuf but not the loader i do: > > g_object_ref(pixbuf); > g_object_unref(loader); > > Does this look good to you? This should be correct, IIRC the pixbuf is owned by the loader. Yeti ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
trouble with win version of a linux gtk app
Hi! I have made a ticker app for linux that I'm trying to port to winxp with mingw and msys. The app reads then renders a text file to a pixmap (a long single-line image), then it scrolls the pixmap by drawing a part of it to a drawing_area, using gdk_draw_drawable() within a timeout handler. The problem is it works fine on linux (the scrolling is really smooth) but the win version is choppy and flickering. Does anyone have an idea? Is it a related to threads or drawing_area or gtk for win? Thanks in advance. Manu Thomas-Maurin ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: gtk_file_chooser_hangs
arne on 07/09/2009 12:39 AM wrote: > I have the problem, that the gtk_file_chooser is not working anymore in > my application under win32. I get just a sandglass-curser over it. > I get no warning or errormessage on the console. > > I Setup a new Computer with Mingw and the actual (2009/06/01) All-In ONE > Bundle. I just compiled an app with Fedora 11 Mingw (gcc 4.4.0) and I have no problems with gtk_file_chooser. It's possible that whatever you have the default path is a network link or some other path that is not immediately accessible. Is it? ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
g_spawn_async_with_pipes() & ssh based IPC
So as much as I wish there were real (open source) ssh client and server C libraries for the ssh infrastructure, the general approach seems to to be child process with redirected IO on the client (with ssh on *nix and plink.exe on windows). On the server side connecting to a long running "server" program would require a helper program launched by the ssh server that then connects up via unix socket or something (why on earth wasn't unix socket forwarding part of the original idea?). I bet someone out there has tried this. Did it work? Anything odd to consider? Any alternative ideas? Any way to even imagine a secure server side on windows (win named pipes perhapses?). Is all this in anyway better than a maybe a custom tls/ssl server or something? I know this is slightly off topic, but I know everybody has had to ask themselves this same question. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: g_spawn_async_with_pipes() & ssh based IPC
Thomas Stover on 07/09/2009 02:37 PM wrote: > Is all this in anyway better than > a maybe a custom tls/ssl server or something? I know this is slightly > off topic, but I know everybody has had to ask themselves this same > question. It's simple to write a GnuTLS server/client setup. Why don't you want to do that? ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: g_spawn_async_with_pipes() & ssh based IPC
Michael Cronenworth wrote: Thomas Stover on 07/09/2009 02:37 PM wrote: Is all this in anyway better than a maybe a custom tls/ssl server or something? I know this is slightly off topic, but I know everybody has had to ask themselves this same question. It's simple to write a GnuTLS server/client setup. Why don't you want to do that? I've done an openssl one before, and I'll look at gnutls, but the problems with that route as I see it are mainly: -you have to authenticate connections somehow- portably, and securely. Where as with ssh the OS just provides you with UIDs. I'm not a fan of the completely separate user database just for the one program architecture either. -(related to authentication) key management - ssh does all that already (ssh-agent, etc) (although the gnome-keyring library works for *nix) -more options for an admin to deal with -as legacy as ssh is, it does so much so well. It just "feels" like leveraging that would be a good idea. Also I might be thinking of the wrong project, but I have some vague memory of GnuTLS taking the downloads on their site down in protest after 911 (unless you donated money) or something quacky like that. (I'm pretty sure I shouldn't have said that, but whatever). ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: gtk_file_chooser_hangs
> I just compiled an app with Fedora 11 Mingw (gcc 4.4.0) and I have no > problems with gtk_file_chooser. > > It's possible that whatever you have the default path is a network link > or some other path that is not immediately accessible. Is it? I will make a Test, without any Network and without the card reader which is build in. But I have no problems with Gimp and Glade and all other File-Handling Applications. What is the difference to the older Version of gtk (libgdk-win32-2.0-0.dll, libgtk-win32-2.0-0.dll) from August 2008? With this Version I don't have any problems, I just need to change the dll's, and the File-chooser works. Can someone Tell me where I can find the Source of the File-Chooser? Perhaps I could try to compile it with some Debug-Output. Best regards Arne ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: g_spawn_async_with_pipes() & ssh based IPC
Thomas Stover on 07/09/2009 03:16 PM wrote: > > I've done an openssl one before, and I'll look at gnutls, but the > problems with that route as I see it are mainly: > -you have to authenticate connections somehow- portably, and securely. > Where as with ssh the OS just provides you with UIDs. I'm not a fan of > the completely separate user database just for the one program > architecture either. > -(related to authentication) key management - ssh does all that already > (ssh-agent, etc) (although the gnome-keyring library works for *nix) > -more options for an admin to deal with > -as legacy as ssh is, it does so much so well. It just "feels" like > leveraging that would be a good idea. > > Also I might be thinking of the wrong project, but I have some vague > memory of GnuTLS taking the downloads on their site down in protest > after 911 (unless you donated money) or something quacky like that. > (I'm pretty sure I shouldn't have said that, but whatever). > You could have a TLS session without x509 auth and just use PAM or LDAP for user auth. Something like that is not provided by a single function call though. Too many options? If you make the server/client yourself then it's limited to however you program it. I don't understand your reasoning for this complaint. SSH is great for remote terminal sessions, but not much more. It sounds like you just want to be extremely lazy. Suck it up and write your own implementation using the standard library tools available. It will be portable -- my GnuTLS apps run on Linux and Windows. I don't remember anything about GnuTLS and any political agenda as that was before my time in FOSS, but I wouldn't be surprised. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: g_spawn_async_with_pipes() & ssh based IPC
On 2009/07/09 13:25, Michael Cronenworth wrote: SSH is great for remote terminal sessions, but not much more. I think the sshfs guys might beg to differ with you on that one. As would anyone who uses subversion or git (etc.) over ssh. Or anyone who's tunneled various protocols using ssh's port forwarding. It sounds like you just want to be extremely lazy. Suck it up and write your own implementation using the standard library tools available. And here I was thinking that the entire point of writing computer programs was so we could be lazy. Anyway, Thomas: as long as you're able to parse the responses you get from the server, using g_spawn_async_with_pipes() and probably GIOChannel, you should be able to do what you want. It probably would be more reliable to write your own TLS server and client, but might not be faster or easier. I'm not sure about the win32 issues, though. -brian ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: g_spawn_async_with_pipes() & ssh based IPC
Michael Cronenworth wrote: You could have a TLS session without x509 auth and just use PAM or LDAP for user auth. Something like that is not provided by a single function call though. In a perfect world a password, another private key, or what ever wouldn't ever enter the picture. ssh-agent / pageant.exe work so darn well once you get up and running. It's already sad enough that there is no way to merge this world with https client authentication, somehow. SVN is one example of something that let's you keep things simple administratively by optionally using the ssh security model. I hate to say it, but the windows named pipes over SMB is another good model (the implementation however...). Passwords all over the place = evil. Each application asking you to decrypt a private key / cert on its own = annoying. Again gnome-keyring-daemon is on the right track, but I need something for the windows side. It sounds like you just want to be extremely lazy. That's the kind of support I need on a 24 hour a day basis. Suck it up and write your own implementation using the standard library tools available. It will be portable -- my GnuTLS apps run on Linux and Windows. This is with a glib event loop right? -- www.thomasstover.com ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: g_spawn_async_with_pipes() & ssh based IPC
Brian J. Tarricone on 07/09/2009 03:45 PM wrote: > > I think the sshfs guys might beg to differ with you on that one. As > would anyone who uses subversion or git (etc.) over ssh. Or anyone > who's tunneled various protocols using ssh's port forwarding. > That's off-topic. I'm not ignorant to those use cases. > > And here I was thinking that the entire point of writing computer > programs was so we could be lazy. Note my word *extreme*. I'm all for easy programming -- but it sounded like the OP wanted to write three function calls and be done. > > Anyway, Thomas: as long as you're able to parse the responses you get > from the server, using g_spawn_async_with_pipes() and probably > GIOChannel, you should be able to do what you want. > > It probably would be more reliable to write your own TLS server and > client, but might not be faster or easier. I'm not sure about the win32 > issues, though. There should be zero win32 issues. One of my Win32 apps uses a GTK gui to talk to a Linux server daemon using XML-ized data packets. Not exactly the same but it works perfectly. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: g_spawn_async_with_pipes() & ssh based IPC
Thomas Stover on 07/09/2009 03:55 PM wrote: > > In a perfect world a password, another private key, or what ever > wouldn't ever enter the picture. ssh-agent / pageant.exe work so darn > well once you get up and running. It's already sad enough that there is > no way to merge this world with https client authentication, somehow. > SVN is one example of something that let's you keep things simple > administratively by optionally using the ssh security model. I hate to > say it, but the windows named pipes over SMB is another good model (the > implementation however...). > > Passwords all over the place = evil. Each application asking you to > decrypt a private key / cert on its own = annoying. Again > gnome-keyring-daemon is on the right track, but I need something for the > windows side. > I understand your authentication requirement, but I haven't written a program myself that masters these interfaces (PAM, LDAP, etc) so this will be my last comment on this. I have extensive knowledge using these interfaces across multiple applications however. There was something that crossed my mind when I first read your OP and this may or may not be what you are looking for... http://www.libssh2.org/wiki/index.php/Main_Page There's packages in Fedora (and probably Debian, etc) for this library, but I have not used it. > > That's the kind of support I need on a 24 hour a day basis. > I hear you. 99.999% uptime is golden. > This is with a glib event loop right? > Yep. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
performance degrading with win32 version
Hi! I now have another question about the linux app ported to winxp. It's a ticker app that reads then renders a text file to a pixmap (a tall single-line image), then it kind of scrolls the pixmap by drawing a part of it to a drawing_area, using gdk_draw_drawable() within a timeout handler set by g_timeout_add(). The problem is it works fine on linux (the scrolling is really smooth) but the win version is choppy and flickering and uses at least 90% of cpu resources (vs 15% with linux.) Does anyone have an clue? Is it related to some mingw config or threads or drawing_area or gtk for win? Thank you. Manu Thomas-Maurin ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
usb plug/unplug notifications
Hi All, I'd like to know how to intercept usb events. Right now, I'm polling for changes, but that isn't the "right" way to handle device discovery. Is there a way to get a notification when something happens in the usb world? Thanks in advance. -Garth -- Garth Upshaw Garth's KidStuff ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: usb plug/unplug notifications
On Thu, 9 Jul 2009 17:38:24 -0500 "Garth's KidStuff" wrote: > I'd like to know how to intercept usb events. Right now, I'm polling > for changes, but that isn't the "right" way to handle device > discovery. Is there a way to get a notification when something happens > in the usb world? In recent distributions, udev is used. udev manages all hardware events, and executes rules which are located in (possibly several) locations. One such location is /usr/udev/rules. You can edit those rules to make events call your programs, modify things, etc. The syntax of the rules is relatively simple and powerful, and you can edit them with a simple editor. The command udevadm monitor will show you the events on the terminal, as a way to look at the events that are detected. Do a 'man udev' for more info. John ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: usb plug/unplug notifications
For desktop application (because we are GTK+ forum) there is HAL (Hardware Abstraction Layer) http://www.freedesktop.org/wiki/Software/hal to receive events and informations from devices and the kernel, gnome-volume-manager use HAL to know when a device has been attached then do some task that the user has defined (eg. mount). --- ajhwb --- garthskidst...@gmail.com wrote: From: "Garth's KidStuff" To: gtk-app-devel-list@gnome.org Subject: usb plug/unplug notifications Date: Thu, 9 Jul 2009 17:38:24 -0500 Hi All, I'd like to know how to intercept usb events. Right now, I'm polling for changes, but that isn't the "right" way to handle device discovery. Is there a way to get a notification when something happens in the usb world? Thanks in advance. -Garth -- Garth Upshaw Garth's KidStuff ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list _ Listen to KNAC, Hit the Home page and Tune In Live! ---> http://www.knac.com ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: usb plug/unplug notifications
On 07/09/2009 09:14 PM, Ardhan Madras wrote: For desktop application (because we are GTK+ forum) there is HAL (Hardware Abstraction Layer) http://www.freedesktop.org/wiki/Software/hal to receive events and informations from devices and the kernel, gnome-volume-manager use HAL to know when a device has been attached then do some task that the user has defined (eg. mount). I'd advice against programming to HAL unless your environment requires it. DeviceKit is the future. P.S. Top posting? :) ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
