3

I have installed libgtk-3-dev and wrote and compiled this code successfully(without errors I mean):

#include <gtk/gtk.h>

void destroy(void) {
  gtk_main_quit();
}

int main (int argc, char** argv) {
  GtkWidget* window;
  GtkWidget* image;

  gtk_init (&argc, &argv);


  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  image  = gtk_image_new_from_file(argv[1]);

  g_signal_connect(G_OBJECT (window), "destroy",
             G_CALLBACK (destroy), NULL);

  gtk_container_add(GTK_CONTAINER (window), image);

  gtk_widget_show_all(window);

  gtk_main();

  return 0;
}

But after trying to run the executable it says:

(process:5771): Gtk-WARNING **: Locale not supported by C library.
    Using the fallback 'C' locale.
Failed to connect to Mir: Failed to connect to server socket: No such file or directory
Unable to init server: Could not connect: Connection refused

(img:5771): Gtk-WARNING **: cannot open display:

I should say I use Ubuntu-server 16/04 and installed xorg, xserver-xorg-video-fbdev, openbox packages too. I have a gray blank screen with a black mouse and right-click menu after boot.

EDIT: I used this command to connect to my board: ssh [email protected] -X Then program worked and it opened the image by ./img 1.png but in my laptop that I used for ssh! I liked to open the image in my board's LCD, not in my laptop!

Also it gives me this message in terminal:

(process:1909): Gtk-WARNING **: Locale not supported by C library.
    Using the fallback 'C' locale.

SOLUTION:I attached a keyboard to my board and opened it's terminal(by right-click inside it's openbox window) and executed my program successfully and it showed my picture in the SPI LCD!

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4
  • @karel: Thanks Karel, but I tried the GTK official example and it didn't work too, and gave me the same error! I must emphasis that my code compiles without error too but when I try ./test 1.png it gives me that error!
    – user3486308
    Commented Nov 2, 2017 at 9:24
  • ./test 1.png works perfectly on my computer so your code works OK, there must be some problem with the operating system, probably related to the gray blank screen with a black mouse and right-click menu after boot. If the code is OK and there is an OS problem then this question is on topic. For example the Failed to connect to Mir: Failed to connect to server socket: No such file or directory error may be because you executed a command as root that didn't need to be executed as root.
    – karel
    Commented Nov 2, 2017 at 9:29
  • @karel: here I said how did I run my display! I think the problem is here: unix.stackexchange.com/questions/401884/…
    – user3486308
    Commented Nov 2, 2017 at 9:34
  • I used startx command inside /etc/rc.local
    – user3486308
    Commented Nov 2, 2017 at 9:37

1 Answer 1

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I attached a keyboard to my board and opened it's terminal(by right-click inside it's openbox window) and executed my program successfully and it showed my picture in the SPI LCD!

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