Re: Close button in GtkNotebook

[Augusto Fraga Giachero <augustofg96 gmail com>]

Hi Eric,

I was doing something similar with what you have proposed, it works but 
the end result differs from what I've observed on other gnome 
applications (Nautilus, Gedit etc...). I want my application to be as 
consistent and theme agnostic as possible. But the central idea of your 
implementation is right, you need to encapsulate the button and the 
label inside a GtkBox.

Stefan Salewski <mail ssalewski de> wrote:
> The gedit code has been modified a few times in the last years, I am
> currently using code from GTK 3.20 in my Nim editor. See
>
> # from 3.20 gedit-documents-panel.c

I've looked in the Gedit source code, and this seems to me the best 
solution. For future reference the tab creation occurs in the 
'row_create' function, the relevant bits are here:
---
generic_row->close_button = GTK_WIDGET (g_object_new (GTK_TYPE_BUTTON,
                                                          "relief", 
GTK_RELIEF_NONE,
"focus-on-click", FALSE,
                                                          NULL));

    context = gtk_widget_get_style_context (generic_row->close_button);
    gtk_style_context_add_class (context, "flat");
    gtk_style_context_add_class (context, "small-button");

    icon = g_themed_icon_new_with_default_fallbacks 
("window-close-symbolic");

---

Would be great to if the Gtk documentation included it, something like 
'Gtk Best Practices', so we don't keep re-inventing the wheel.

Thanks!
Augusto Fraga Giachero
On 28-05-2017 20:32, cecashon aol com wrote:
> Hi Augusto,
>
> This doesn't use glade but it might help out. You can add a label and 
> button to a box and add it to the notebook tab. In the button 
> "clicked" callback you can us the notebook pointer if you need that 
> variable. If you want to be able to really customize the look and size 
> of the button you could replace it with a drawing area and draw your 
> own button.
>
> Eric
>
> /*
>    gcc -Wall notebook1.c -o notebook1 `pkg-config --cflags --libs 
> gtk+-3.0`
>    Tested with GTK3.18 on Ubuntu16.04
> */
>
> #include<gtk/gtk.h>
>
> static void button_clicked(GtkWidget *button, GtkWidget *notebook)
>   {
>     g_print("Clicked\n");
>   }
> int main(int argc, char *argv[])
>   {
>     gtk_init (&argc, &argv);
>
>     GtkWidget *window=gtk_window_new(GTK_WINDOW_TOPLEVEL);
>     gtk_window_set_title(GTK_WINDOW(window), "Notebook");
>     gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);
>     gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
>     g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
>
>     GtkWidget *label1=gtk_label_new("page1");
>     GtkWidget *label2=gtk_label_new("page2");
>     GtkWidget *nb_label1=gtk_label_new("tab1");
>     GtkWidget *nb_label2=gtk_label_new("tab2");
>
>     GtkWidget *x_label=gtk_label_new(NULL);
>     gtk_label_set_markup(GTK_LABEL(x_label), "<span 
> foreground='red'>x</span>");
>
>     GtkWidget *button=gtk_button_new();
>     gtk_container_add(GTK_CONTAINER(button), x_label);
>
>     GtkWidget *box=gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 4);
>     gtk_box_pack_start(GTK_BOX(box), nb_label2, TRUE, TRUE, 0);
>     gtk_box_pack_start(GTK_BOX(box), button, FALSE, FALSE, 0);
>     gtk_widget_show_all(box);
>
>     GtkWidget *notebook=gtk_notebook_new();
>     gtk_notebook_append_page(GTK_NOTEBOOK(notebook), label1, nb_label1);
>     gtk_notebook_append_page(GTK_NOTEBOOK(notebook), label2, box);
>
>     g_signal_connect(button, "clicked", G_CALLBACK(button_clicked), 
> notebook);
>
>     gtk_container_add(GTK_CONTAINER(window), notebook);
>
>     gtk_widget_show_all(window);
>
>     gtk_main();
>
>     return 0;
>   }