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Glade: How do I pass more than one argument to a signal handler?


Glade: How do I pass more than one argument to a signal handler?

By : user3863071
Date : January 02 2021, 06:48 AM
will help you What you can do in glade is very limited. You can pass zero or one object as userdata to a signal handler. The object has to be a widget (or other object) also present in the glade project.
If you connect the signal from code on the other hand, you can pass a structure containing various stuff as you please.
code :


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Do I have to manually attach a gtk signal handler when I specified the function name in glade?

Do I have to manually attach a gtk signal handler when I specified the function name in glade?


By : user2424776
Date : March 29 2020, 07:55 AM
it should still fix some issue I'm writing my first gtk program, using gtkmm, and glade. I made a filechooserbutton and it has a signal called file-set So I set that to what I assume is the function name I want it to call when the file is chosen. But then I see here: http://library.gnome.org/devel/gtkmm-tutorial/unstable/sec-builder-accessing-widgets.html.en , This is how I did it:
code :
// create the UI
refUI = Gtk::Builder::create();
refUI->add_from_file(grq::GLADE_FILE);

// grab your widget
refUI->get_widget("but_new", but_new); // Gtk::ToolButton *but_new;
but_new->signal_clicked().connect(sigc::mem_fun(*this, &MainWindow::on_new_game));

// your signal handler looks something like this :)
void MainWindow::on_new_game() {}
int main(int argc, char **argv) {

    Gtk::Main       kit(argc, argv);
    MainWindow      main_window;

    kit.run(*main_window.window);

    return 0;
}
class MainWindow
{

private:
Glib::RefPtr<Gtk::Builder> refUI;

//
// Widgets
//

Gtk::ToolButton *but_about;

public:

// The window. This is public so we can hook into events and
// call kit.run(window) against it, if needed.
Gtk::Window *window;


MainWindow()
{
    // Load the data for this window and it's widgets.
    refUI = Gtk::Builder::create();
    refUI->add_from_file(grq::GLADE_FILE);


    // The window
    refUI->get_widget("main_window", window);


    // Widgets              
    refUI->get_widget("but_about", but_about);
    but_about->signal_clicked().connect(sigc::mem_fun(*this, &MainWindow::on_about));

            ...

}


virtual ~MainWindow()
{
    if (window != NULL)
    {
        delete window; // Frees all the children for the window, too.
    }
}

    virtual void on_about()
    {
            // stuff
    }

};
Glade, GtkBuiler or Gtk unexpectedly swapped a signal handler

Glade, GtkBuiler or Gtk unexpectedly swapped a signal handler


By : small coder
Date : March 29 2020, 07:55 AM
This might help you Glade does this so that when you pass another object you can call a standard gtk function directly on it (Such as closing a window) without needing to write any code at all.
Gtk+Glade: widgets using same signal handler. How to differ them from each other?

Gtk+Glade: widgets using same signal handler. How to differ them from each other?


By : Malik A. Abualzait
Date : March 29 2020, 07:55 AM
it fixes the issue The reason you're getting a value back like "GTKToggleButton" is because you have not manually set the name using gtk_widget_set_name. According to the GTK documentation:
GTK+ 3.0 with Glade 3.10: signal handler not found, menu not showing

GTK+ 3.0 with Glade 3.10: signal handler not found, menu not showing


By : user2358039
Date : March 29 2020, 07:55 AM
help you fix your problem Fixed it. The problem was:
1: Signals weren't connected correctly to events. 2: The menu is there but I looked simply at the wrong place. I'm using Ubuntu with Unity so the menu is showing up at the top of the monitor and not at the top of the application window. This post brought my attention to the issue: https://askubuntu.com/questions/460819/ubuntu-gtk-3-10-8-not-able-to-visualize-a-menubar-made-by-glade
Unable to connect signal and signal handler in Glade GTK+3

Unable to connect signal and signal handler in Glade GTK+3


By : Naval Dabral
Date : March 29 2020, 07:55 AM
hope this fix your issue Take a look at the gtk_builder_connect_signals() and gtk_builder_add_callback_symbol() documentation. Basically you need to either
use gtk_builder_add_callback_symbol() on all callbacks before connecting the signals or link with gmodule-export-2.0 and use compile flags "-Wl,--export-dynamic" to export even unused symbols.
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