Re: Custom widget painting with GtkStyle

[Artur Galyamov <artur-pub yandex ru>]

#include <gtk/gtk.h>

static GtkWidget *window = NULL;

static gboolean
expose_event(GtkWidget *widget, GdkEventExpose *event)
{
    static GtkStyle *style = NULL;

    int x = widget->allocation.x;
    int y = widget->allocation.y;
    int width = widget->allocation.width;
    int height = widget->allocation.height;

    if (!style)
        style = gtk_rc_get_style_by_paths(gtk_settings_get_default(), NULL,
            "GtkButton", GTK_TYPE_BUTTON);

    style = gtk_style_attach(style, widget->window);

    gtk_paint_box(style, widget->window,
        GTK_STATE_NORMAL,
        GTK_SHADOW_OUT, &event->area,
        widget, "button",
        x, y, width, height);

    gtk_style_detach(style);
    return FALSE;
}

static GtkWidget *
create_widget(void)
{
    GtkWidget *vbox = gtk_vbox_new(FALSE, 4);
    GtkWidget *btn0 = gtk_vbox_new(FALSE, 0);
    GtkWidget *btn1 = gtk_button_new();
    GtkWidget *btn2 = gtk_button_new();

    GTK_WIDGET_SET_FLAGS(btn0, GTK_APP_PAINTABLE);

    g_signal_connect(btn0, "expose-event",
        (GCallback) expose_event, NULL);
    gtk_box_pack_start(GTK_BOX(vbox), btn0, 1, 1, 0);
    gtk_box_pack_start(GTK_BOX(vbox), btn1, 1, 1, 0);
    gtk_box_pack_start(GTK_BOX(vbox), btn2, 1, 1, 0);

    gtk_container_set_border_width(GTK_CONTAINER(vbox), 4);
    gtk_widget_show_all(vbox);
    return vbox;
}

int
main(int argc, char *argv[])
{
    gtk_init(&argc, &argv);
    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_default_size(GTK_WINDOW(window), 400, 300);
    auto void on_destroy(void);
    auto void on_destroy(void) { gtk_main_quit(); }
    g_signal_connect(window, "destroy", (GCallback) on_destroy, NULL);
    gtk_container_add(GTK_CONTAINER(window), create_widget());
    gtk_widget_show(window);
    gtk_main();
    return 0;
}

Attaches don't work here..

-- 
Artur