Re: GtkTreeView Path Ambiguity (Header vs First Row )

[Tadej Borovšak <tadeboro gmail com>]

Hello.

> The menu featuring a treeview needs to let the user select any column in the header so they can sort the rows but when they are moving through rows, I only want them to be able to focus the two leftmost columns (there are five total).
>
> So, I need to be able to test on key press if they are past the second column in a row, and prevent them from moving farther right, but if they are in the header, they can move all the way.
>
> I was trying to accomplish this by testing to see if focus is in the header or on a row, but I've been stymied at every turn.

You can test whether tree view has focus. If gtk_widget_has_focus()
returns TRUE, user is moving inside tree view area; if returned value
is FALSE, focus is somewhere else.

Have a look at this minimalistic sample code and play a bit with it.
Maybe method similar to this can solve your troubles?

----------
#include <gtk/gtk.h>

static gboolean
cb_timeout (GtkWidget *tree)
{
  if (gtk_widget_has_focus (tree))
    g_print ("Focus in\n");
  else
    g_print ("Focus out\n");

  return TRUE;
}

int
main (int   argc,
      char **argv)
{
  GtkWidget    *window,
               *swindow,
               *tree;
  GtkListStore *store;
  gint          i,
                j;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  g_signal_connect (window, "destroy", gtk_main_quit, NULL);

  swindow = gtk_scrolled_window_new (NULL, NULL);
  gtk_container_add (GTK_CONTAINER (window), swindow);

  store = gtk_list_store_new (5, G_TYPE_STRING,
                                 G_TYPE_STRING,
                                 G_TYPE_STRING,
                                 G_TYPE_STRING,
                                 G_TYPE_STRING);
  for (i = 1; i < 10; i++)
    {
      GtkTreeIter iter;

      gtk_list_store_append (store, &iter);

      for (j = 0; j < 5; j++)
        {
          gchar text[] = "( , )";

          text[1] = '0' + j;
          text[3] = '0' + i;

          gtk_list_store_set (store, &iter, j, text, -1);
        }
    }

  tree = gtk_tree_view_new_with_model (GTK_TREE_MODEL (store));
  gtk_container_add (GTK_CONTAINER (swindow), tree);

  for (i = 0; i < 5; i++)
    {
      gchar              text[] = "Column  ";
      GtkCellRenderer   *cell = gtk_cell_renderer_text_new();
      GtkTreeViewColumn *col;

      text[7] = '0' + i;
      cell = gtk_cell_renderer_text_new();
      g_object_set (cell, "editable", TRUE, NULL);
      col = gtk_tree_view_column_new_with_attributes (text, cell,
                                                      "text", i,
                                                      NULL);
      gtk_tree_view_column_set_clickable (col, TRUE);

      gtk_tree_view_append_column (GTK_TREE_VIEW (tree), col);
    }

  gtk_widget_show_all (window);

  g_timeout_add (330, (GSourceFunc)cb_timeout, tree);

  gtk_main();

  return 0;
}
------------

Tadej

-- 
Tadej Borovšak
tadeboro.blogspot.com
tadeboro gmail com
tadej borovsak gmail com