#include /* * README README README README README README README README README README * README README README README README README README README README README * README README README README README README README README README README * README README README README README README README README README README * README README README README README README README README README README * README README README README README README README README README README * README README README README README README README README README README * README README README README README README README README README README * README README README README README README README README README README * README README README README README README README README README README * README README README README README README README README README README * README README README README README README README README README README * README README README README README README README README README README * * DO NOT!!! I REPEAT DO NOT! EVER LOOK AT THIS CODE AS AN EXAMPLE OF WHAT YOUR * CODE SHOULD LOOK LIKE. * * IT IS VERY CONFUSING, AND IS MEANT TO TEST A LOT OF CODE IN THE TREE. WHILE * IT IS ACTUALLY CORRECT CODE, IT IS NOT USEFUL. */ GtkWidget *left_tree_view; GtkWidget *top_right_tree_view; GtkWidget *bottom_right_tree_view; GtkTreeModel *left_tree_model; GtkTreeModel *top_right_tree_model; GtkTreeModel *bottom_right_tree_model; GtkWidget *sample_tree_view_top; GtkWidget *sample_tree_view_bottom; #define column_data "my_column_data" /* Kids, don't try this at home. */ /* Small GtkTreeModel to model columns */ typedef struct _ViewColumnModel ViewColumnModel; typedef struct _ViewColumnModelClass ViewColumnModelClass; struct _ViewColumnModel { GObject parent; GtkTreeView *view; GList *columns; gint stamp; }; struct _ViewColumnModelClass { GObjectClass parent_class; }; static void view_column_model_init (ViewColumnModel *model) { model->stamp = g_random_int (); } static gint view_column_model_get_n_columns (GtkTreeModel *tree_model) { return 2; } static GType view_column_model_get_column_type (GtkTreeModel *tree_model, gint index) { switch (index) { case 0: return G_TYPE_STRING; case 1: return GTK_TYPE_TREE_VIEW_COLUMN; default: return G_TYPE_INVALID; } } static gboolean view_column_model_get_iter (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreePath *path) { ViewColumnModel *view_model = (ViewColumnModel *)tree_model; GList *list; gint i; g_return_val_if_fail (gtk_tree_path_get_depth (path) > 0, FALSE); i = gtk_tree_path_get_indices (path)[0]; list = g_list_nth (view_model->columns, i); if (list == NULL) return FALSE; iter->stamp = view_model->stamp; iter->user_data = list; return TRUE; } static GtkTreePath * view_column_model_get_path (GtkTreeModel *tree_model, GtkTreeIter *iter) { ViewColumnModel *view_model = (ViewColumnModel *)tree_model; GtkTreePath *retval; GList *list; gint i = 0; g_return_val_if_fail (iter->stamp == view_model->stamp, NULL); for (list = view_model->columns; list; list = list->next) { if (list == (GList *)iter->user_data) break; i++; } if (list == NULL) return NULL; retval = gtk_tree_path_new (); gtk_tree_path_append_index (retval, i); return retval; } static void view_column_model_get_value (GtkTreeModel *tree_model, GtkTreeIter *iter, gint column, GValue *value) { ViewColumnModel *view_model = (ViewColumnModel *)tree_model; g_return_if_fail (column < 2); g_return_if_fail (view_model->stamp == iter->stamp); g_return_if_fail (iter->user_data != NULL); if (column == 0) { g_value_init (value, G_TYPE_STRING); g_value_set_string (value, gtk_tree_view_column_get_title (GTK_TREE_VIEW_COLUMN (((GList *)iter->user_data)->data))); } else { g_value_init (value, GTK_TYPE_TREE_VIEW_COLUMN); g_value_set_object (value, ((GList *)iter->user_data)->data); } } static gboolean view_column_model_iter_next (GtkTreeModel *tree_model, GtkTreeIter *iter) { ViewColumnModel *view_model = (ViewColumnModel *)tree_model; g_return_val_if_fail (view_model->stamp == iter->stamp, FALSE); g_return_val_if_fail (iter->user_data != NULL, FALSE); iter->user_data = ((GList *)iter->user_data)->next; return iter->user_data != NULL; } static gboolean view_column_model_iter_children (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *parent) { ViewColumnModel *view_model = (ViewColumnModel *)tree_model; /* this is a list, nodes have no children */ if (parent) return FALSE; /* but if parent == NULL we return the list itself as children of the * "root" */ if (view_model->columns) { iter->stamp = view_model->stamp; iter->user_data = view_model->columns; return TRUE; } else return FALSE; } static gboolean view_column_model_iter_has_child (GtkTreeModel *tree_model, GtkTreeIter *iter) { return FALSE; } static gint view_column_model_iter_n_children (GtkTreeModel *tree_model, GtkTreeIter *iter) { return g_list_length (((ViewColumnModel *)tree_model)->columns); } static gint view_column_model_iter_nth_child (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *parent, gint n) { ViewColumnModel *view_model = (ViewColumnModel *)tree_model; if (parent) return FALSE; iter->stamp = view_model->stamp; iter->user_data = g_list_nth ((GList *)view_model->columns, n); return (iter->user_data != NULL); } static gboolean view_column_model_iter_parent (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *child) { return FALSE; } static void view_column_model_tree_model_init (GtkTreeModelIface *iface) { iface->get_n_columns = view_column_model_get_n_columns; iface->get_column_type = view_column_model_get_column_type; iface->get_iter = view_column_model_get_iter; iface->get_path = view_column_model_get_path; iface->get_value = view_column_model_get_value; iface->iter_next = view_column_model_iter_next; iface->iter_children = view_column_model_iter_children; iface->iter_has_child = view_column_model_iter_has_child; iface->iter_n_children = view_column_model_iter_n_children; iface->iter_nth_child = view_column_model_iter_nth_child; iface->iter_parent = view_column_model_iter_parent; } GType view_column_model_get_type (void) { static GType view_column_model_type = 0; if (!view_column_model_type) { static const GTypeInfo view_column_model_info = { sizeof (GtkListStoreClass), NULL, /* base_init */ NULL, /* base_finalize */ NULL, /* class_init */ NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GtkListStore), 0, (GInstanceInitFunc) view_column_model_init, }; static const GInterfaceInfo tree_model_info = { (GInterfaceInitFunc) view_column_model_tree_model_init, NULL, NULL }; view_column_model_type = g_type_register_static (G_TYPE_OBJECT, "ViewModelColumn", &view_column_model_info, 0); g_type_add_interface_static (view_column_model_type, GTK_TYPE_TREE_MODEL, &tree_model_info); } return view_column_model_type; } static void update_columns (GtkTreeView *view, ViewColumnModel *view_model) { GList *old_columns = view_model->columns; gint old_length, length; GList *a, *b; view_model->columns = gtk_tree_view_get_columns (view_model->view); /* As the view tells us one change at a time, we can do this hack. */ length = g_list_length (view_model->columns); old_length = g_list_length (old_columns); if (length != old_length) { GtkTreePath *path; gint i = 0; /* where are they different */ for (a = old_columns, b = view_model->columns; a && b; a = a->next, b = b->next) { if (a->data != b->data) break; i++; } path = gtk_tree_path_new (); gtk_tree_path_append_index (path, i); if (length < old_length) { view_model->stamp++; gtk_tree_model_deleted (GTK_TREE_MODEL (view_model), path); } else { GtkTreeIter iter; iter.stamp = view_model->stamp; iter.user_data = b; gtk_tree_model_inserted (GTK_TREE_MODEL (view_model), path, &iter); } gtk_tree_path_free (path); } else { gint i; gint m = 0, n = 1; gint *new_order; GtkTreePath *path; new_order = g_new (int, length); a = old_columns; b = view_model->columns; while (a->data == b->data) { a = a->next; b = b->next; if (a == NULL) return; m++; } if (a->next->data == b->data) { b = b->next; while (b->data != a->data) { b = b->next; n++; } for (i = 0; i < m; i++) new_order[i] = i; for (i = m; i < m+n; i++) new_order[i] = i+1; new_order[i] = m; for (i = m + n +1; i < length; i++) new_order[i] = i; } else { a = a->next; while (a->data != b->data) { a = a->next; n++; } for (i = 0; i < m; i++) new_order[i] = i; new_order[m] = m+n; for (i = m+1; i < m + n+ 1; i++) new_order[i] = i - 1; for (i = m + n + 1; i < length; i++) new_order[i] = i; } path = gtk_tree_path_new (); gtk_tree_model_reordered (GTK_TREE_MODEL (view_model), path, NULL, new_order); gtk_tree_path_free (path); g_free (new_order); } if (old_columns) g_list_free (old_columns); } static GtkTreeModel * view_column_model_new (GtkTreeView *view) { GtkTreeModel *retval; retval = GTK_TREE_MODEL (g_object_new (view_column_model_get_type (), NULL)); ((ViewColumnModel *)retval)->view = view; ((ViewColumnModel *)retval)->columns = gtk_tree_view_get_columns (view); gtk_signal_connect (GTK_OBJECT (view), "columns_changed", GTK_SIGNAL_FUNC (update_columns), retval); return retval; } /* Back to sanity. */ static void add_clicked (GtkWidget *button, gpointer data) { static gint i = 0; GtkTreeIter iter; GtkTreeViewColumn *column; GtkTreeSelection *selection; GtkCellRenderer *cell; gchar *label = g_strdup_printf ("Column %d", i); cell = gtk_cell_renderer_text_new (); column = gtk_tree_view_column_new_with_attributes (label, cell, "text", 0, NULL); g_object_set_data_full (G_OBJECT (column), column_data, label, g_free); gtk_tree_view_column_set_reorderable (column, TRUE); gtk_tree_view_column_set_sizing (column, GTK_TREE_VIEW_COLUMN_RESIZABLE); gtk_list_store_append (GTK_LIST_STORE (left_tree_model), &iter); gtk_list_store_set (GTK_LIST_STORE (left_tree_model), &iter, 0, label, 1, column, -1); i++; selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (left_tree_view)); gtk_tree_selection_select_iter (selection, &iter); } static void get_visible (GtkTreeViewColumn *tree_column, GtkCellRenderer *cell, GtkTreeModel *tree_model, GtkTreeIter *iter, gpointer data) { GtkTreeViewColumn *column; gtk_tree_model_get (tree_model, iter, 1, &column, -1); if (column) { gtk_cell_renderer_toggle_set_active (GTK_CELL_RENDERER_TOGGLE (cell), gtk_tree_view_column_get_visible (column)); } } static void set_visible (GtkCellRendererToggle *cell, gchar *path_str, gpointer data) { GtkTreeView *tree_view = (GtkTreeView *) data; GtkTreeViewColumn *column; GtkTreeModel *model; GtkTreeIter iter; GtkTreePath *path = gtk_tree_path_new_from_string (path_str); model = gtk_tree_view_get_model (tree_view); gtk_tree_model_get_iter (model, &iter, path); gtk_tree_model_get (model, &iter, 1, &column, -1); if (column) { gtk_tree_view_column_set_visible (column, ! gtk_tree_view_column_get_visible (column)); gtk_tree_model_range_changed (model, path, &iter, path, &iter); } gtk_tree_path_free (path); } static void add_left_clicked (GtkWidget *button, gpointer data) { GtkTreeIter iter; gchar *label; GtkTreeViewColumn *column; GtkTreeSelection *selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (data)); gtk_tree_selection_get_selected (selection, NULL, &iter); gtk_tree_model_get (gtk_tree_view_get_model (GTK_TREE_VIEW (data)), &iter, 0, &label, 1, &column, -1); if (GTK_WIDGET (data) == top_right_tree_view) gtk_tree_view_remove_column (GTK_TREE_VIEW (sample_tree_view_top), column); else gtk_tree_view_remove_column (GTK_TREE_VIEW (sample_tree_view_bottom), column); /* gtk_list_store_remove (GTK_LIST_STORE (gtk_tree_view_get_model (GTK_TREE_VIEW (data))), &iter);*/ /* Put it back on the left */ gtk_list_store_append (GTK_LIST_STORE (left_tree_model), &iter); gtk_list_store_set (GTK_LIST_STORE (left_tree_model), &iter, 0, label, 1, column, -1); selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (left_tree_view)); gtk_tree_selection_select_iter (selection, &iter); g_free (label); } static void add_right_clicked (GtkWidget *button, gpointer data) { GtkTreeIter iter; gchar *label; GtkTreeViewColumn *column; GtkTreeSelection *selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (left_tree_view)); gtk_tree_selection_get_selected (selection, NULL, &iter); gtk_tree_model_get (GTK_TREE_MODEL (left_tree_model), &iter, 0, &label, 1, &column, -1); gtk_list_store_remove (GTK_LIST_STORE (left_tree_model), &iter); if (GTK_WIDGET (data) == top_right_tree_view) gtk_tree_view_append_column (GTK_TREE_VIEW (sample_tree_view_top), column); else gtk_tree_view_append_column (GTK_TREE_VIEW (sample_tree_view_bottom), column); g_free (label); } static void selection_changed (GtkTreeSelection *selection, GtkWidget *button) { if (gtk_tree_selection_get_selected (selection, NULL, NULL)) gtk_widget_set_sensitive (button, TRUE); else gtk_widget_set_sensitive (button, FALSE); } static GtkTargetEntry row_targets[] = { { "GTK_TREE_MODEL_ROW", GTK_TARGET_SAME_APP, 0} }; int main (int argc, char *argv[]) { GtkWidget *window; GtkWidget *hbox, *vbox; GtkWidget *vbox2, *bbox; GtkWidget *button; GtkTreeViewColumn *column; GtkCellRenderer *cell; GtkWidget *swindow; GtkTreeModel *sample_model; gint i; gtk_init (&argc, &argv); /* First initialize all the models for signal purposes */ left_tree_model = (GtkTreeModel *) gtk_list_store_new_with_types (2, G_TYPE_STRING, GTK_TYPE_POINTER); sample_model = (GtkTreeModel *) gtk_list_store_new_with_types (1, G_TYPE_STRING); sample_tree_view_top = gtk_tree_view_new_with_model (sample_model); sample_tree_view_bottom = gtk_tree_view_new_with_model (sample_model); top_right_tree_model = (GtkTreeModel *) view_column_model_new (GTK_TREE_VIEW (sample_tree_view_top)); bottom_right_tree_model = (GtkTreeModel *) view_column_model_new (GTK_TREE_VIEW (sample_tree_view_bottom)); top_right_tree_view = gtk_tree_view_new_with_model (top_right_tree_model); bottom_right_tree_view = gtk_tree_view_new_with_model (bottom_right_tree_model); for (i = 0; i < 10; i++) { GtkTreeIter iter; gchar *string = g_strdup_printf ("%d", i); gtk_list_store_append (GTK_LIST_STORE (sample_model), &iter); gtk_list_store_set (GTK_LIST_STORE (sample_model), &iter, 0, string, -1); g_free (string); } /* Set up the test windows. */ window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_window_set_default_size (GTK_WINDOW (window), 300, 300); gtk_window_set_title (GTK_WINDOW (window), "Top Window"); swindow = gtk_scrolled_window_new (NULL, NULL); gtk_container_add (GTK_CONTAINER (window), swindow); gtk_container_add (GTK_CONTAINER (swindow), sample_tree_view_top); gtk_widget_show_all (window); window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_window_set_default_size (GTK_WINDOW (window), 300, 300); gtk_window_set_title (GTK_WINDOW (window), "Bottom Window"); swindow = gtk_scrolled_window_new (NULL, NULL); gtk_container_add (GTK_CONTAINER (window), swindow); gtk_container_add (GTK_CONTAINER (swindow), sample_tree_view_bottom); gtk_widget_show_all (window); /* Set up the main window */ window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_window_set_default_size (GTK_WINDOW (window), 500, 300); vbox = gtk_vbox_new (FALSE, 8); gtk_container_set_border_width (GTK_CONTAINER (vbox), 8); gtk_container_add (GTK_CONTAINER (window), vbox); hbox = gtk_hbox_new (FALSE, 8); gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, TRUE, 0); /* Left Pane */ cell = gtk_cell_renderer_text_new (); swindow = gtk_scrolled_window_new (NULL, NULL); gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); left_tree_view = gtk_tree_view_new_with_model (left_tree_model); gtk_container_add (GTK_CONTAINER (swindow), left_tree_view); gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (left_tree_view), -1, "Unattached Columns", cell, "text", 0, NULL); cell = gtk_cell_renderer_toggle_new (); g_signal_connect_data (G_OBJECT (cell), "toggled", (GCallback) set_visible, left_tree_view, NULL, FALSE, FALSE); column = gtk_tree_view_column_new_with_attributes ("Visible", cell, NULL); gtk_tree_view_append_column (GTK_TREE_VIEW (left_tree_view), column); g_object_unref (G_OBJECT (column)); gtk_tree_view_column_set_cell_data_func (column, cell, get_visible, NULL, NULL); gtk_box_pack_start (GTK_BOX (hbox), swindow, TRUE, TRUE, 0); /* Middle Pane */ vbox2 = gtk_vbox_new (FALSE, 8); gtk_box_pack_start (GTK_BOX (hbox), vbox2, FALSE, FALSE, 0); bbox = gtk_vbutton_box_new (); gtk_button_box_set_layout (GTK_BUTTON_BOX (bbox), GTK_BUTTONBOX_SPREAD); gtk_button_box_set_child_size (GTK_BUTTON_BOX (bbox), 0, 0); gtk_box_pack_start (GTK_BOX (vbox2), bbox, TRUE, TRUE, 0); button = gtk_button_new_with_label ("<<"); gtk_widget_set_sensitive (button, FALSE); gtk_signal_connect (GTK_OBJECT (button), "clicked", GTK_SIGNAL_FUNC (add_left_clicked), top_right_tree_view); g_signal_connectc (G_OBJECT (gtk_tree_view_get_selection (GTK_TREE_VIEW (top_right_tree_view))), "changed", GTK_SIGNAL_FUNC (selection_changed), button, FALSE); gtk_box_pack_start (GTK_BOX (bbox), button, FALSE, FALSE, 0); button = gtk_button_new_with_label (">>"); gtk_widget_set_sensitive (button, FALSE); gtk_signal_connect (GTK_OBJECT (button), "clicked", GTK_SIGNAL_FUNC (add_right_clicked), top_right_tree_view); g_signal_connectc (G_OBJECT (gtk_tree_view_get_selection (GTK_TREE_VIEW (left_tree_view))), "changed", GTK_SIGNAL_FUNC (selection_changed), button, FALSE); gtk_box_pack_start (GTK_BOX (bbox), button, FALSE, FALSE, 0); bbox = gtk_vbutton_box_new (); gtk_button_box_set_layout (GTK_BUTTON_BOX (bbox), GTK_BUTTONBOX_SPREAD); gtk_button_box_set_child_size (GTK_BUTTON_BOX (bbox), 0, 0); gtk_box_pack_start (GTK_BOX (vbox2), bbox, TRUE, TRUE, 0); button = gtk_button_new_with_label ("<<"); gtk_widget_set_sensitive (button, FALSE); gtk_signal_connect (GTK_OBJECT (button), "clicked", GTK_SIGNAL_FUNC (add_left_clicked), bottom_right_tree_view); g_signal_connectc (G_OBJECT (gtk_tree_view_get_selection (GTK_TREE_VIEW (bottom_right_tree_view))), "changed", GTK_SIGNAL_FUNC (selection_changed), button, FALSE); gtk_box_pack_start (GTK_BOX (bbox), button, FALSE, FALSE, 0); button = gtk_button_new_with_label (">>"); gtk_widget_set_sensitive (button, FALSE); gtk_signal_connect (GTK_OBJECT (button), "clicked", GTK_SIGNAL_FUNC (add_right_clicked), bottom_right_tree_view); g_signal_connectc (G_OBJECT (gtk_tree_view_get_selection (GTK_TREE_VIEW (left_tree_view))), "changed", GTK_SIGNAL_FUNC (selection_changed), button, FALSE); gtk_box_pack_start (GTK_BOX (bbox), button, FALSE, FALSE, 0); /* Right Pane */ vbox2 = gtk_vbox_new (FALSE, 8); gtk_box_pack_start (GTK_BOX (hbox), vbox2, TRUE, TRUE, 0); swindow = gtk_scrolled_window_new (NULL, NULL); gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (top_right_tree_view), FALSE); cell = gtk_cell_renderer_text_new (); gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (top_right_tree_view), -1, NULL, cell, "text", 0, NULL); cell = gtk_cell_renderer_toggle_new (); g_signal_connect_data (G_OBJECT (cell), "toggled", (GCallback) set_visible, top_right_tree_view, NULL, FALSE, FALSE); column = gtk_tree_view_column_new_with_attributes (NULL, cell, NULL); gtk_tree_view_column_set_cell_data_func (column, cell, get_visible, NULL, NULL); gtk_tree_view_append_column (GTK_TREE_VIEW (top_right_tree_view), column); gtk_container_add (GTK_CONTAINER (swindow), top_right_tree_view); gtk_box_pack_start (GTK_BOX (vbox2), swindow, TRUE, TRUE, 0); swindow = gtk_scrolled_window_new (NULL, NULL); gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (bottom_right_tree_view), FALSE); cell = gtk_cell_renderer_text_new (); gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (bottom_right_tree_view), -1, NULL, cell, "text", 0, NULL); cell = gtk_cell_renderer_toggle_new (); g_signal_connect_data (G_OBJECT (cell), "toggled", (GCallback) set_visible, bottom_right_tree_view, NULL, FALSE, FALSE); column = gtk_tree_view_column_new_with_attributes (NULL, cell, NULL); gtk_tree_view_column_set_cell_data_func (column, cell, get_visible, NULL, NULL); gtk_tree_view_append_column (GTK_TREE_VIEW (bottom_right_tree_view), column); gtk_container_add (GTK_CONTAINER (swindow), bottom_right_tree_view); gtk_box_pack_start (GTK_BOX (vbox2), swindow, TRUE, TRUE, 0); /* Drag and Drop */ gtk_tree_view_set_rows_drag_source (GTK_TREE_VIEW (left_tree_view), GDK_BUTTON1_MASK, row_targets, G_N_ELEMENTS (row_targets), GDK_ACTION_MOVE, NULL, NULL); gtk_tree_view_set_rows_drag_dest (GTK_TREE_VIEW (left_tree_view), row_targets, G_N_ELEMENTS (row_targets), GDK_ACTION_MOVE, NULL, NULL); gtk_tree_view_set_rows_drag_source (GTK_TREE_VIEW (top_right_tree_view), GDK_BUTTON1_MASK, row_targets, G_N_ELEMENTS (row_targets), GDK_ACTION_MOVE, NULL, NULL); gtk_tree_view_set_rows_drag_dest (GTK_TREE_VIEW (top_right_tree_view), row_targets, G_N_ELEMENTS (row_targets), GDK_ACTION_MOVE, NULL, NULL); gtk_tree_view_set_rows_drag_source (GTK_TREE_VIEW (bottom_right_tree_view), GDK_BUTTON1_MASK, row_targets, G_N_ELEMENTS (row_targets), GDK_ACTION_MOVE, NULL, NULL); gtk_tree_view_set_rows_drag_dest (GTK_TREE_VIEW (bottom_right_tree_view), row_targets, G_N_ELEMENTS (row_targets), GDK_ACTION_MOVE, NULL, NULL); gtk_box_pack_start (GTK_BOX (vbox), gtk_hseparator_new (), FALSE, FALSE, 0); hbox = gtk_hbox_new (FALSE, 8); gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0); button = gtk_button_new_with_mnemonic ("_Add new Column"); gtk_signal_connect (GTK_OBJECT (button), "clicked", GTK_SIGNAL_FUNC (add_clicked), left_tree_model); gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0); gtk_widget_show_all (window); gtk_main (); return 0; }