[Gtk+2] Reproduce the look of GtkTreeView header

[Maggio Mago <dev maggio gmail com>]

Hello,

I need to set a custom widget in the GtkTreeView header.
I have done this with gtk_tree_view_column_set_widget() but my widget wasn't worked.

So i have created my custom header widget and set gtk_tree_view_set_headers_visible(false).
However i can not reproduce the look of the TreeView header.
Maybe a problem of style

Can you help me to reproduce the look of a GtkTreeView header ?

Following my code:

/* @file my-header.c */

G_DEFINE_TYPE (MyHeader, my_header, GTK_TYPE_WIDGET)

static void
my_header_class_init(MyHeaderClass *klass)
{
    GtkWidgetClass *gtkwidget_class;
    gtkwidget_class = (GtkWidgetClass *) klass;

    /* ... */
    gtkwidget_class->expose_event  = my_header_expose;

    gtk_rc_parse_string ("widget_class '*.MyHeader' style 'treeview_header' ");
    /* ... */
}


static gboolean
my_header_expose (GtkWidget *widget, GdkEventExpose *event)
{
    gtk_paint_box(widget->style,
                  widget->window,
                  GTK_STATE_NORMAL,
                  GTK_SHADOW_NONE,
                  &event->area,
                  widget,
                  "button",
                  event->area.x, event->area.y, event->area.width, event->area.height);

    return FALSE;
}

PJ: Sample

Attachment: my_tree_view_header.tar.gz
Description: GNU Zip compressed data