I don't know the gtk specific case. But since the calls are synchronous and can take severals miliseconds, doing it on GUI thread would make the UI unresponsive.
2016-09-12 21:29 GMT-03:00 Ben Iofel <iofel...@gmail.com>: > Why not just make async network requests on the UI thread? > > > On Mon, Sep 12, 2016 at 12:37 PM Daniel. <danielhi...@gmail.com> wrote: >> >> Well, if I wasn't clear before my layout is totally questionable. I >> more generic question would be: >> >> How you guys aproaches when the problem is showing applications >> behavior on screen? >> >> My backend logic is something like this: >> >> - Start a new thread for each address passed in command line. Address >> are 32bits numbers. >> - At each thraed: >> - While (true) >> - Make the background yellow >> - Send a message and wait for response (a blocking call) >> - If timeout set background red >> - else set background green >> - showup the latency (how much time the "Send a message" taken) >> - wait a second so that user can see other background color than >> yellow >> >> - Start a new thread to receive events >> - While (true) >> - when some event arrive: >> - instantiate a new label describing the event and show it onto >> the screen >> - reply the event (blocks till reply acknowledge) >> - remove the event from the screen >> >> >> Is there any monitoring software that reacts to outside world events >> and show then in some GTK GUI? That would be a good inspiration :) >> >> Best regards, >> >> 2016-09-12 13:19 GMT-03:00 Daniel. <danielhi...@gmail.com>: >> > Hi thank you guys for the replies, >> > >> > Gergely, I can't really use FlowBox since I'm depending on gtk2, not >> > 3. So the solution is really implementing my own widget as Joël said >> > .. Joël in swing I usually use an event queue so that there is only >> > one thread doing GUI modifications. Is that pattern used often in gtk? >> > I think that this pattern is cleaner and more ellegant that >> > synchronizing at every single thread, the problem is that I can't have >> > lambda expressions in C :(. How would I apply this pattern to GTK? >> > >> > Best regards, >> > >> > 2016-09-12 12:56 GMT-03:00 Joël Krähemann <jkraehem...@gmail.com>: >> >> Hi again >> >> >> >> Don't mess synchronized with a mutex. The closest thing to >> >> synchronized would be ags_task_thread_append_task() >> >> and run things exclusively >> >> >> >> >> >> http://git.savannah.gnu.org/cgit/gsequencer.git/tree/ags/thread/ags_task_thread.h?h=0.7.x >> >> >> >> bests, >> >> Joël >> >> >> >> >> >> >> >> On Mon, Sep 12, 2016 at 5:50 PM, Joël Krähemann <jkraehem...@gmail.com> >> >> wrote: >> >>> Hi >> >>> >> >>> Since I know Javax/Swing I can tell you there is no synchronize >> >>> keyword doing your magic. >> >>> >> >>> Please take a look at pthread_mutex_lock(), pthread_cond_wait(), >> >>> pthread_cond_signal(), pthread_cond_broadcast() >> >>> or pthread_barrier_wait(). >> >>> >> >>> Bests, >> >>> Joël >> >>> >> >>> >> >>> On Mon, Sep 12, 2016 at 5:17 PM, Joël Krähemann >> >>> <jkraehem...@gmail.com> wrote: >> >>>> Hi >> >>>> >> >>>> You can't do that without implementing your own widget because of >> >>>> thread-safety issues. To do your own >> >>>> GtkFlowBox implement GtkWidget:size-allocate and >> >>>> GtkWidget:size-request the rest is up to you. >> >>>> >> >>>> Don't forget doing mutices or use g_timeout_add() but this is single >> >>>> threaded and is invoked by >> >>>> g_main_context_iteration(). >> >>>> >> >>>> For a simple example consider this: >> >>>> >> >>>> >> >>>> http://git.savannah.gnu.org/cgit/gsequencer.git/tree/ags/X/editor/ags_notebook.c?h=0.7.x#n167 >> >>>> >> >>>> It is a scrolled window containing buttons doing a scrollable area. >> >>>> >> >>>> You have to use gdk_threads_enter() and gdk_threads_leave(). Might be >> >>>> you have even to acquire >> >>>> the GMainContext. >> >>>> >> >>>> Bests, >> >>>> Joël >> >>>> >> >>>> >> >>>> >> >>>> On Mon, Sep 12, 2016 at 5:03 PM, Gergely Polonkai >> >>>> <gerg...@polonkai.eu> wrote: >> >>>>> Hello, >> >>>>> >> >>>>> I have no knowledge of Java/Swing, but based on your requirements I >> >>>>> guess >> >>>>> you need FlowBox[1]. >> >>>>> >> >>>>> Best, >> >>>>> Gergely >> >>>>> >> >>>>> [1] https://developer.gnome.org/gtk3/stable/GtkFlowBox.html >> >>>>> >> >>>>> On Mon, Sep 12, 2016, 16:35 Daniel. <danielhi...@gmail.com> wrote: >> >>>>> >> >>>>>> Hi everybody, >> >>>>>> >> >>>>>> I have a library implementing some protocol. That library is >> >>>>>> multithread and is responsible to delivery messages to remote nodes >> >>>>>> and retrieve it's responses. I need to visualise the whole mess >> >>>>>> running. >> >>>>>> >> >>>>>> To do this I wrote a simple application in Java/Swing where for >> >>>>>> each >> >>>>>> remote node one thread is created. The thread will send a message >> >>>>>> and >> >>>>>> wait for response in a closed loop. Each thread is represented at >> >>>>>> GUI >> >>>>>> by a label on the screen. When it's idle the background of that >> >>>>>> label >> >>>>>> becomes green, when is waiting for response it is yellow and if >> >>>>>> timeouts it becomes red. All labels have the same information so >> >>>>>> that >> >>>>>> they have exactly the same size. >> >>>>>> >> >>>>>> Beside the request/repsonse there is events that can arrive from >> >>>>>> the >> >>>>>> nodes too. That events need to be replied as the messages. When an >> >>>>>> event arrives it's showed up on screen as a new label. When it's >> >>>>>> reply >> >>>>>> is acknowledge it's removed from the screen. >> >>>>>> >> >>>>>> In pratice there is a big container where the labels came and go >> >>>>>> and >> >>>>>> change its background colors based on messages, replies and events >> >>>>>> comming and going. >> >>>>>> >> >>>>>> I've been using FlowLayout as the "big container". The labels are >> >>>>>> added and arrange horizontally by FlowLayout. When no room is >> >>>>>> avaible >> >>>>>> at the current row, a new row is added. When the rows exceed the >> >>>>>> window size a scrowbar appears. >> >>>>>> >> >>>>>> I'm looking for something silimar with GTK2 (I'll run in a embeeded >> >>>>>> system that doesn't have GTK3). >> >>>>>> >> >>>>>> My questions are: >> >>>>>> >> >>>>>> 1) Is there some container with equivalent behavior to the Swing's >> >>>>>> FlowLayout? If no I think I'll need to build one from hbox+vbox, >> >>>>>> what >> >>>>>> would be the best aproach to it. >> >>>>>> 2) How is the best way to change the background of a label? >> >>>>>> 3) What is the better aproach when adding instantiating, adding, >> >>>>>> showing, hiding removing and freeing widgets at runtime? What can >> >>>>>> get >> >>>>>> wrong? >> >>>>>> >> >>>>>> References: >> >>>>>> >> >>>>>> https://docs.oracle.com/javase/tutorial/uiswing/layout/visual.html#flow >> >>>>>> >> >>>>>> Best regards, >> >>>>>> -- >> >>>>>> "Do or do not. There is no try" >> >>>>>> Yoda Master >> >>>>>> _______________________________________________ >> >>>>>> gtk-app-devel-list mailing list >> >>>>>> gtk-app-devel-list@gnome.org >> >>>>>> https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list >> >>>>>> >> >>>>> _______________________________________________ >> >>>>> gtk-app-devel-list mailing list >> >>>>> gtk-app-devel-list@gnome.org >> >>>>> https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list >> > >> > >> > >> > -- >> > "Do or do not. There is no try" >> > Yoda Master >> >> >> >> -- >> "Do or do not. There is no try" >> Yoda Master >> _______________________________________________ >> gtk-app-devel-list mailing list >> gtk-app-devel-list@gnome.org >> https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list -- "Do or do not. There is no try" Yoda Master _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
