Re: Fwd: gnome applet w/ bash

thank you so much for the help you gave me
i created my first gnome applet (there is also a cpu graph) and it looks
very good!

On Mon, 2007-11-05 at 23:50 +1100, Michael Lamothe wrote:
Oh dear,

#include <sys/utsname.h>

      struct utsname name;
      printf("%s\n", name.sysname);
      printf("%s\n", name.nodename);
      printf("%s\n", name.release);
      printf("%s\n", name.version);
      printf("%s\n", name.machine);



On 05/11/2007, Matteo Landi <matteo landi email it> wrote:

On Mon, 2007-11-05 at 22:55 +1100, Michael Lamothe wrote:
Hi Matteo,

I'm not following.  What box?  A GtkBox?  What "row"?

they are just examples

Have you thought of using Glade to do your UI work?

the fact is that i've started working with gtk two days ago because i
was interested in make a gnome panel monitor, and in the tutorial i've
found, i create a panel with the bonobo inititialization..
i dont know if i can do this even with glade..

Talking about the spawn, i think the problem is due to the command
itself (uname) that at the end print a "\n"; So i gotta throw away that
char from the string to obtaine a one line label, isn't it?




On 05/11/2007, Matteo Landi <matteo landi email it> wrote:
ok ok that worked, but the output is the same as before...

just try to create a box with two labels inside:

one createt with label = gtk_label_new ("foo");
and the other created with label = gtk_label_new (std_output);

i got the foo one middle aligned and the second placed on the top of the
row.. am i wrong?


On Mon, 2007-11-05 at 22:06 +1100, Michael Lamothe wrote:
Your pseudo makes no sense, how can you pass a char * into parameter 2
of g_spawn_command_line_sync() when its a gchar**.  This worked for

      gchar* std_output = NULL;
      g_spawn_command_line_sync("ls -al", &std_output, NULL, NULL, NULL);



On 05/11/2007, Matteo Landi <matteo landi email it> wrote:
Tnx i think that the first one is the function i'm in need of; by the
way i cant' make it work, and my gnome panel crashs everytime i run the
applet, so i think there is some problems with memory:
well, i've got:
const char* data (as argoment of a function)
char *std_out (created in the function)

g_spawn_command_line_sync(data, std_out, NULL, NULL, NULL);

is this call right? i think not...but why??

tnx again

On Mon, 2007-11-05 at 15:21 +1100, Michael Lamothe wrote:
Hi Matteo,

There's a few ways to do this, two of which I'll tell you now.
Hopefully, you can change your application to use these functions

Firstly, there's the g_spawn_ set of APIs designed for this.  I think
that something like g_spawn_command_line_sync() will do exactly what
you want.  Basically, GLib calculates and allocates the space
required.  The documentation mentions nothing about freeing the
allocated strings afterwards but I imagine you will have to free the
standard_output and standard_error parameters with g_free().

Secondly, if the spawned program is meant to run asynchronously in the
background then you'll need to use something like
g_spawn_async_with_pipes().  I don't think that this is what you want
because you were talking about having to allocate the length of the



On 05/11/2007, Matteo Landi <matteo landi email it> wrote:
thank you very much, that solved one of my problems.
here is the second:
i'm using a pipe to catch the output of a specific command and store it
as a label in the panel; the problem is that if the array containing the
output is smaller than the output itself, the line is cut, and the
applet is show all middle aligned; if the output is bigger, i get the
label splitted in two lines: the first one containing the entire output,
and the second one is empty.
How could i solve this? maybe with dynamic allocation of memory, but in
order to know the output width size, i gotta insert a while that
overload the applet isn't it?
tnx in advance for the help


On Sun, 2007-11-04 at 13:33 +1100, Michael Lamothe wrote:
Hi Matteo,

Look at g_timeout_add() or the new gdk_threads_add_timeout().



On 04/11/2007, Matteo Landi <matteo landi email it> wrote:
hi all
i'm a complete newbie in developing with gtk, but yesterday i had an
idea about develope a gnome panel which could substitute conky..
In fact i'm in need of a panel that simply display the output of a bash
well, after have googled a bit, i found a guide for implementing gnome
applet and here is the result

#include <string.h>
#include <panel-applet.h>
#include <gtk/gtklabel.h>
#include <stdio.h>

static gboolean on_button_press (GtkWidget *event_box, GdkEventButton
*event, GtkWidget* label){
        if (event->button != 1)
                return FALSE;
        else {
                FILE* fp;
                char line[160];
                fp = popen("~/scripts/allin1", "r");
                fgets( line, sizeof line, fp);
                gtk_label_set_text (label,(const char*) line);
        return TRUE;

static gboolean my_applet_fill (PanelApplet *applet, const gchar *iid,
gpointer data){
        FILE* fp;
        int pid;
        char line[160];
        GtkWidget *label;

        fp = popen("~/scripts/allin1", "r");
        fgets( line, sizeof line, fp);

        label = gtk_label_new (line);
        gtk_container_add (GTK_CONTAINER (applet), label);

        g_signal_connect (G_OBJECT(applet), "button_press_event", G_CALLBACK
(on_button_press), label);

        gtk_widget_show_all (GTK_WIDGET (applet));

        return TRUE;

PANEL_TYPE_APPLET, "Conky Porting", "0", my_applet_fill, NULL);

what i'm asking for is how could i refresh the label of the applet after
a fixed period of time... (now the applets refresh when mouse-clicked)
tnx in advance


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