Re: Problem passing widget through functions!!

[TORRI Vincent <Vincent Torri math u-bordeaux fr>]

On Wed, 4 Jun 2003, Satan Devil wrote:

> The code below display 1 button.
> From the code below, Why can't I remove "main_vbox =
> gtk_vbox_new(FALSE, 0);" and put it in add_something()
> as "w = gtk_vbox_new(FALSE, 0);". Logically, it should
> work but it doesn't. The function add_something() is
> ONLY PASSING pointer.
>
> thanx!
> The code below is working but is not what I want.
> What I want is comment main_vbox = gtk_vbox_new(FALSE,
> 0);   and uncomment //w = gtk_vbox_new(FALSE, 0);
>
>
> // Compile : g++ -o test test.cpp `gtk-config --cflags
> --libs`
> #include <gtk/gtk.h>
> #include <string>     // string
> #include <iostream>   // cout
>
> using std::cout;
> using std::string;
>
> class TEST
> {
> private:
>       GtkWidget *window, *main_vbox;
>
> public:
>       TEST();
>       void add_something(GtkWidget *w);
> };
> TEST::TEST()
> {
>       window = gtk_window_new (GTK_WINDOW_TOPLEVEL);  
>       gtk_signal_connect(GTK_OBJECT(window),
> "delete_event",       GTK_SIGNAL_FUNC(gtk_main_quit),
> NULL);
>       gtk_window_set_title(GTK_WINDOW(window), "Notebook");
>       gtk_widget_set_usize(GTK_WIDGET(window), 800, 600);     
>       gtk_container_border_width(GTK_CONTAINER(window), 3);
>       gtk_widget_show(window);
>       
>
>       main_vbox = gtk_vbox_new(FALSE, 0);// Don't want to
> write this here!
>       add_something(main_vbox);
>
>       // Add a button to main_vbox.
>       GtkWidget *bb = gtk_button_new_with_label("Button");
>       gtk_box_pack_start(GTK_BOX(main_vbox), bb, TRUE,
> TRUE, 20);// Connect to main_vbox
>       gtk_widget_show(bb);
>
> }
> void TEST::add_something(GtkWidget *w)
> {
>       //w = gtk_vbox_new(FALSE, 0);   // Want to pass
> main_vbox here but not working

I am not a C++ expert, but why do you want to pass main_vbox, as it is an 
element of the class TEST ??

>       gtk_container_add(GTK_CONTAINER(window), w);    // Link
> main_vbox to window.

Here, you use window without passing it.

regards

Vincent TORRI

>       gtk_widget_show(w);
>
> }
> int main(int argc, char *argv[])
> {
>     
>     gtk_init(&argc, &argv);
>     
>     TEST test;
>
>     gtk_main();
>       return(0);
> }
>
>
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-- 
TORRI Vincent
Mathematiques Appliquees Bordeaux                                                
Institut de Mathematiques                                                       
Universite Bordeaux 1                                                           
351 cours de la liberation                                                      
33 405 Talence cedex - France                                                   
                                                                                
Tel : 33 (0)5 40 00 21 42                                                       
Fax : 33 (0)5 40 00 26 26                                                       
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