[Gtkmm] Gtk::Button issue

[kahumba]

Hi,
How do I make a Gtk::Button display only its icon? (that is the icon without the text label)

[SledgeHammer_999]

What happens when you do a button.set_label("") ?

[kahumba]

Forgot to mention, I'm creating the button from Gtk::Stock::GO_BACK, but I want it to show only the icon without the label. And happens the opposite: a button with a label without the icon.

SledgeHammer_999 (http://ubuntuforums.org/member.php?u=76221): since the icon doesn't show up at all it only shows whatever label I set. Don't know what it has to do with my question though.

[SledgeHammer_999]

Hmmm, can you give me a simple example code? (I certainly was able to show only an image using set_image(), in the past.)

[kahumba]

It looks like it's one of those Gnome's developers crappy decisions, the difference is that this decision is crappier than usually. I just read this:
http://www.mail-archive.com/desktop-devel-list@gnome.org/msg17769.html

Anyway, here's the example:


#include <gtkmm.h>

int main(int argc, char *argv[]) {
Gtk::Main kit(argc, argv);
Gio::init();
Gtk::Window window;

Gtk::Button *btn = Gtk::manage(new Gtk::Button(Gtk::Stock::GO_BACK));
window.add(*btn);

window.show_all_children();
window.set_default_size(200, 200);
Gtk::Main::run(window);
return 0;
}

[SledgeHammer_999]

Hmm after some digging I think I found an answer for your problem. From Gtk::Button::set_image(): (http://library.gnome.org/devel/gtkmm/unstable/classGtk_1_1Button.html#ac49972018a8ed3392e897cdf9 da66391)

Note that it depends on the Gtk::Settings:gtk-button-images setting whether the image will be displayed or not, you don't have to call Gtk::Widget::show() on image yourself.

So your code should look like this:

#include <gtkmm.h>

int main(int argc, char *argv[]) {
Gtk::Main kit(argc, argv);
Gio::init();
Gtk::Window window;

Gtk::Settings::get_default()->property_gtk_button_images() = true;

Gtk::Button *btn = Gtk::manage(new Gtk::Button(Gtk::Stock::GO_BACK));
window.add(*btn);

window.show_all_children();
window.set_default_size(200, 200);
Gtk::Main::run(window);
return 0;
}

Unfortunately this shows the label too. Doing a set_label("") vanishes the image+label. After some digging I found what exactly are Stock IDs. They are not images. They are objects that can contain labels and/or images. From the gtk docs-->link (http://library.gnome.org/devel/gtk/stable/gtk-Stock-Items.html):


Each stock ID can be associated with a GtkStockItem, which contains the user-visible label, keyboard accelerator, and translation domain of the menu or toolbar item; and/or with an icon stored in a GtkIconFactory. See GtkIconFactory for more information on stock icons. The connection between a GtkStockItem and stock icons is purely conventional (by virtue of using the same stock ID); it's possible to register a stock item but no icon, and vice versa. Stock icons may have a RTL variant which gets used for right-to-left locales.

So for me the simplest method to display a Stock Icon is doing it this way:


#include <gtkmm.h>

int main(int argc, char *argv[]) {
Gtk::Main kit(argc, argv);
Gio::init();
Gtk::Window window;

Gtk::Image img(Gtk::Stock::GO_BACK, Gtk::ICON_SIZE_BUTTON);

Gtk::Button *btn = Gtk::manage(new Gtk::Button());
btn->set_image(img);
window.add(*btn);

window.show_all_children();
window.set_default_size(200, 200);
Gtk::Main::run(window);
return 0;
}

[kahumba]

Thanks a lot! seems to work!