Re: gchar * properties

[Pablo Yanez Trujillo <yanezp informatik uni-freiburg de>]

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Hi

> As far as I my experience go, it is usually safe to assume that
> g_object_set( widget, "prop", value, NULL ) does the same thing as
> gtk_widget_set_prop( widget, value ). In the case of gchar * values,
> the value gets it's own copy of a string via g_strdup.

thanks, I've checked the original pointer with the returning pointer and they were different. So it seems that a copy is
always done.

> This is a copy from gtkwidget.h file. I cannot say if it is safe to
> change that, but you can always try and see what happens;)

I've made a test with a glade file:


GtkWindow *setting_window;
setting_window = g_object_new(GTK_TYPE_WINDOW,
        "title", "Settings",
        "border-width", 6,
        "window-position", GTK_WIN_POS_MOUSE,
        NULL);

g_printf("win name = %s\n", gtk_widget_get_name(GTK_WIDGET(setting_window)));

GtkVBox *vbox = GTK_VBOX(glade_xml_get_widget(new_xml, "mainwin_vbox"));

g_printf("vbox name = %s\n", gtk_widget_get_name(GTK_WIDGET(vbox)));

gtk_container_add(GTK_CONTAINER(setting_window), GTK_WIDGET(vbox));

button = GTK_BUTTON(glade_xml_get_widget(new_xml, "mainwin_close"));
g_signal_connect(button, "clicked", G_CALLBACK(close_me), setting_window);

image = GTK_IMAGE(glade_xml_get_widget(new_xml, "image1"));
g_object_set(image,
        "file", "supertux.gif",
        NULL);

g_printf("image name = %s\n", gtk_widget_get_name(GTK_WIDGET(image)));

This was the result:
win name = GtkWindow
vbox name = mainwin_vbox
image name = image1

it seems to me that it's safe to use the name property since glade uses it too. You can set any widget name within
glade-3 and I've never had problems with it.

I know that I can get an answer for some things directly out from the code but sometimes I don't know whether the piece
of code I've looked into is just a exception or if there's a policy for suchs things, that's why I've asked in the first
place ;)

It's seems great if I'm able to save "custom data" in the 'name' property. Sometimes it's handy to do that.

Regards
Pablo


- --
Pablo Yánez Trujillo
http://klingsor.informatik.uni-freiburg.de/
My public key: http://klingsor.informatik.uni-freiburg.de/gpg/supertux.asc
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