LinuxQuestions.org - GTK programming

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- - GTK programming (https://www.linuxquestions.org/questions/programming-9/gtk-programming-341896/)

Ok after checking out ncurses and xlib im trying to figure out what im doing
wrong here. The tutorial im reading wants to create a basic program that
creates a window.

here is the code.

Code:

#include <gtk/gtk.h>

int main( int argc,char *argv[] )

{

        GtkWidget *window;

        gtk_init (&argc, &argv);

        window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

        gtk_widget_show (window);

        gtk_main ();

 

  return(0);

}

im compiling with gcc -o test main.c 'gtk-config --cflags --libs'

and i have gtk-1.2 and 2.0 installed

i get the compiler error GtkWidget undefined and GTK_WINDOW_TOPLEVEL undefined.

shouldent these be defined in the header file ???

hmm, yeah it should be included... does "gtk-config --libs --cflags" present the right details though? Maybe that's a gtk-1.4 thing?

But really... can i just suggest that you don't bother? instead use gtk2 instead.. why bother learning a deprecated library that is no longer supported?

Hmm i thought this was gtk 2.0 programming model.

know of any tutorials that have the updated 2.0 stuff ??

C language of course not C++

gtk.org for everything really... i forget the code differences between the two, so maybe that IS gtk2 code, BUT you are definitely linking on gtk1 libraries. gtk1 uses the gtk-config gubbins, whilst gtk2 uses the mroe complete pkg-config framework for getting libs and cflag values.

Try replacing your compile command:
gcc -o test main.c 'gtk-config --cflags --libs'

with this one:
gcc -o test main.c `pkg-config --cflags --libs gtk+-2.0`

Notice the different quote marks around the last half of the command, that may be part of your problem.

I would suggest you use an IDE for developing large GUI applications.

Much easier and saves quite a bit of trouble compiling.

Anjuta is a good IDE for GTK and Gnome development while KDevelop is also a very good general purpose IDE.

Yea that was the issue it was the ` ohh on the gtk+-2.0 page the latest one is not there its supposed to be but its not. I installed that and now am trying to solve another issue with compiling a simple hello world program keeps giving me a parse error but i see no error with the syntax. ??

here is the line gcc is not likeing

Code:

static gboolean delete_event (GtkWidget *widget, GtkEvent *event , gpointer data)

I get a gcc error of parse error before GtkEvent;

It looks fine to me for a function im not familliar with gboolean tho is that the issue?

I think you shoulda copied and pasted it instead of retyping..! it's GdkEvent, not a GtkEvent.

Ok somehow by removeing my /* */ to track the issue im no longer getting a syntax error but another has occured here let me just post the whole code.

Code:

#include <gtk/gtk.h> 

static void hello(GtkWidget *widget, gpointer data)

{

        g_print("Hello World\n");



}

static gboolean delete_event(GtkWidget *widget, GdkEvent *event, gpointer data)

{

  g_print("Delete Event occured");





        return TRUE;

}

 

 static void destroy (GtkWidget *widget,gpointer data)

{

gtk_main_quit();

}



int main(int argc, char *argv[])



{

        GtkWidget *window; 

        GtkWidget *button;        



gtk_init (&argc, &argv);



window = gtk_window_new(GTK_WINDOW_TOPLEVEL);





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





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



gtk_container_set_border_width (GTK_CONTAINER (window), 10);



button = gtk_button_new_with_label ("Hello World");



g_signel_connect (G_OBJECT (button), "clicked", G_CALLBACK (hello), NULL); 



g_signel_connect_swapped ( G_OBJECT (button), "clicked", G_CALLBACK (gtk_widget_destroy), G_OBJECT 

(window)); 



gtk_container_add (GTK_CONTAINER (window), button);

 

gtk_widget_show (button); 



gtk_widget_show (window); 



gtk_main();



return 0; 



}

im double checking my code to see if I copied something wrong. but if you find it here before I do then cool.

ohh here is what im copying http://www.gtk.org/tutorial/ch-getti...SEC-HELLOWORLD

Never mind i found it.

lol helps if i spell signal correctly.

Cool well Im experimenting more and more with gtk+-2.0 im starting to see why programmers like this interface for creating gui apps. Its much eazier to figure out then xlib or ncurses. Maybe its just me tho , but its something at least i can understand why this is here and why thats there in the programming code.