Suggestion: show a whole tree of widgets

[Stefan Wille <Stefan_Wille public uni-hamburg de>]

Hello everybody,


today I went through Ian's tutorial, and I
asked myself why I have to call

        gtk_widget_show(mywidget);

for every single widget I create. If I could just
create, configure and pack all widgets and then had to
say 'show' only to their container (maybe a dialog), things
would become handier.


My suggestion is to introduce a new method

        gtk_widget_show_all(GtkWidget* widget);

that shows a whole tree of widgets. One calls
it on the window that contains all the other widgets
to be shown.


Here's an implementation:

void gtk_widget_show_tree_impl(GtkWidget* widget, gpointer data)
{
        /* show all descendants */
        if( GTK_IS_CONTAINER(widget) )
                gtk_container_foreach(GTK_CONTAINER(widget),
                                       gtk_widget_show_tree_impl,
                                       (gpointer)0);

        /* show this */
        gtk_widget_show(widget);
}

void gtk_widget_show_tree(GtkWidget* widget)
{
        gtk_widget_show_tree_impl(widget,0);
}


As a test, I took Packing Demonstration Program from
Ian's tutorial, removed every call to gtk_widget_show and
changed the call
        gtk_widget_show(window)
at the bottom to
        gtk_widget_show_tree(window).

It works fine. And saves a lot of code, and is intuitive -
because most times you want to show the whole thing anyway.

Aahm, maybe something like this is part of gtk already? I have looked
for
such a call, but not found.

well, what do You think?


listening
Stefan Wille  <Stefan_Wille@public.uni-hamburg.de>