zenity/src/tree.c

/*
 * tree.c
 *
 * Copyright (C) 2002 Sun Microsystems, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * Authors: Glynn Foster <glynn.foster@sun.com>
 *          Jonathan Blanford <jrb@redhat.com>
 *          Kristian Rietveld <kris@gtk.org>
 */

#include "config.h"

#include "util.h"
#include "zenity.h"
#include <stdlib.h>
#include <string.h>

#define MAX_ELEMENTS_BEFORE_SCROLLING 5
#define PRINT_HIDE_COLUMN_SEPARATOR ","

static GtkBuilder *builder;
static GSList *selected;
static gchar *separator;
static gboolean print_all_columns = FALSE;
static gint *print_columns = NULL;
static gint *hide_columns = NULL;
static GIOChannel *channel;

static int *zenity_tree_extract_column_indexes (char *indexes, gint n_columns);
static gboolean zenity_tree_column_is_hidden (gint column_index);
static void zenity_tree_dialog_response (
	GtkWidget *widget, int response, gpointer data);
static void zenity_tree_row_activated (GtkTreeView *tree_view,
	GtkTreePath *tree_path, GtkTreeViewColumn *tree_col, gpointer data);

static gboolean
zenity_tree_dialog_untoggle (
	GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, gpointer data) {
	GValue toggle_value = {
		0,
	};

	gtk_tree_model_get_value (model, iter, 0, &toggle_value);

	if (g_value_get_boolean (&toggle_value))
		gtk_list_store_set (GTK_LIST_STORE (model), iter, 0, FALSE, -1);
	return FALSE;
}

static void
zenity_tree_toggled_callback (
	GtkCellRendererToggle *cell, gchar *path_string, gpointer data) {
	GtkTreeModel *model;
	GtkTreeIter iter;
	GtkTreePath *path;
	gboolean value;

	model = GTK_TREE_MODEL (data);

	/* Because this is a radio list, we should untoggle the previous toggle so
	 * that
	 * we only have one selection at any given time
	 */

	if (GPOINTER_TO_INT (g_object_get_data (G_OBJECT (model), "radio")) == 1) {
		gtk_tree_model_foreach (model, zenity_tree_dialog_untoggle, NULL);
	}

	path = gtk_tree_path_new_from_string (path_string);
	gtk_tree_model_get_iter (model, &iter, path);
	gtk_tree_model_get (model, &iter, 0, &value, -1);

	value = !value;
	gtk_list_store_set (GTK_LIST_STORE (model), &iter, 0, value, -1);

	gtk_tree_path_free (path);
}

static void
zenity_load_pixbuf (GtkTreeViewColumn *tree_column, GtkCellRenderer *cell,
	GtkTreeModel *tree_model, GtkTreeIter *iter, gpointer data) {
	static GHashTable *pixbuf_cache = NULL;
	GError *error = NULL;
	GdkPixbuf *pixbuf;
	gchar *str;

	gtk_tree_model_get (tree_model, iter, 0, &str, -1);

	if (!str)
		return;

	if (!pixbuf_cache) {
		pixbuf_cache = g_hash_table_new (g_str_hash, g_str_equal);
		g_assert (pixbuf_cache);
	}

	pixbuf = g_hash_table_lookup (pixbuf_cache, str);

	if (!pixbuf) {
		pixbuf = gdk_pixbuf_new_from_file (str, &error);
		if (!pixbuf)
			g_warning ("Failed to load '%s'", str);

		g_hash_table_insert (pixbuf_cache, g_strdup (str), pixbuf);
	}

	if (pixbuf)
		g_object_set (cell, "pixbuf", pixbuf, NULL);

	g_free (str);
}

static gboolean
zenity_tree_handle_stdin (
	GIOChannel *channel, GIOCondition condition, gpointer data) {
	static GtkTreeView *tree_view;
	GtkTreeModel *model;
	static GtkTreeIter iter;
	static gint column_count = 0;
	static gint row_count = 0;
	static gint n_columns;
	static gboolean editable;
	static gboolean toggles;
	static gboolean first_time = TRUE;
	GIOStatus status = G_IO_STATUS_NORMAL;

	tree_view = GTK_TREE_VIEW (data);
	n_columns =
		GPOINTER_TO_INT (g_object_get_data (G_OBJECT (tree_view), "n_columns"));
	editable =
		GPOINTER_TO_INT (g_object_get_data (G_OBJECT (tree_view), "editable"));
	toggles =
		GPOINTER_TO_INT (g_object_get_data (G_OBJECT (tree_view), "toggles"));

	model = gtk_tree_view_get_model (tree_view);

	if (first_time) {
		first_time = FALSE;
		gtk_list_store_append (GTK_LIST_STORE (model), &iter);
	}

	if ((condition & G_IO_IN) == G_IO_IN) {
		GString *string;
		GError *error = NULL;

		string = g_string_new (NULL);

		while ((g_io_channel_get_flags (channel) & G_IO_FLAG_IS_READABLE) !=
			G_IO_FLAG_IS_READABLE)
			;
		do {
			do {
				if (g_io_channel_get_flags (channel) & G_IO_FLAG_IS_READABLE)
					status = g_io_channel_read_line_string (
						channel, string, NULL, &error);
				else
					return FALSE;

				while (gtk_events_pending ())
					gtk_main_iteration ();

				// TODO: Find a better way to avoid 100% cpu utilization
				g_usleep (10000);

			} while (status == G_IO_STATUS_AGAIN);

			if (status != G_IO_STATUS_NORMAL) {
				if (error) {
					g_warning (
						"zenity_tree_handle_stdin () : %s", error->message);
					g_error_free (error);
					error = NULL;
				}
				continue;
			}

			if (column_count == n_columns) {
				/* We're starting a new row */
				column_count = 0;
				row_count++;
				gtk_list_store_append (GTK_LIST_STORE (model), &iter);
			}

			if (toggles && column_count == 0) {
				if (strcmp (g_ascii_strdown (
								zenity_util_strip_newline (string->str), -1),
						"true") == 0)
					gtk_list_store_set (
						GTK_LIST_STORE (model), &iter, column_count, TRUE, -1);
				else
					gtk_list_store_set (
						GTK_LIST_STORE (model), &iter, column_count, FALSE, -1);
			} else {
				gtk_list_store_set (GTK_LIST_STORE (model),
					&iter,
					column_count,
					zenity_util_strip_newline (string->str),
					-1);
			}

			if (editable) {
				gtk_list_store_set (
					GTK_LIST_STORE (model), &iter, n_columns, TRUE, -1);
			}

			if (row_count == MAX_ELEMENTS_BEFORE_SCROLLING) {
				GtkWidget *scrolled_window;
				GtkRequisition rectangle;

				gtk_widget_get_preferred_size (
					GTK_WIDGET (tree_view), &rectangle, NULL);
				scrolled_window = GTK_WIDGET (
					gtk_builder_get_object (builder, "zenity_tree_window"));
				gtk_widget_set_size_request (
					scrolled_window, -1, rectangle.height);
				gtk_scrolled_window_set_policy (
					GTK_SCROLLED_WINDOW (scrolled_window),
					GTK_POLICY_AUTOMATIC,
					GTK_POLICY_AUTOMATIC);
			}

			column_count++;

		} while ((g_io_channel_get_buffer_condition (channel) & G_IO_IN) ==
				G_IO_IN &&
			status != G_IO_STATUS_EOF);
		g_string_free (string, TRUE);
	}

	if ((condition & G_IO_IN) != G_IO_IN || status == G_IO_STATUS_EOF) {
		g_io_channel_shutdown (channel, TRUE, NULL);
		return FALSE;
	}
	return TRUE;
}

static void
zenity_tree_fill_entries_from_stdin (GtkTreeView *tree_view, gint n_columns,
	gboolean toggles, gboolean editable) {
	g_object_set_data (
		G_OBJECT (tree_view), "n_columns", GINT_TO_POINTER (n_columns));
	g_object_set_data (
		G_OBJECT (tree_view), "toggles", GINT_TO_POINTER (toggles));
	g_object_set_data (
		G_OBJECT (tree_view), "editable", GINT_TO_POINTER (editable));

	channel = g_io_channel_unix_new (0);
	g_io_channel_set_encoding (channel, NULL, NULL);
	g_io_channel_set_flags (channel, G_IO_FLAG_NONBLOCK, NULL);
	g_io_add_watch (
		channel, G_IO_IN | G_IO_HUP, zenity_tree_handle_stdin, tree_view);
}

static void
zenity_tree_fill_entries (GtkTreeView *tree_view, const gchar **args,
	gint n_columns, gboolean toggles, gboolean editable) {
	GtkTreeModel *model;
	GtkTreeIter iter;
	gint i = 0;

	model = gtk_tree_view_get_model (tree_view);

	g_object_set_data (
		G_OBJECT (tree_view), "n_columns", GINT_TO_POINTER (n_columns));

	while (args[i] != NULL) {
		gint j;

		gtk_list_store_append (GTK_LIST_STORE (model), &iter);

		for (j = 0; j < n_columns; j++) {

			if (toggles && j == 0) {
				if (strcmp (g_ascii_strdown ((gchar *) args[i + j], -1),
						"true") == 0)
					gtk_list_store_set (
						GTK_LIST_STORE (model), &iter, j, TRUE, -1);
				else
					gtk_list_store_set (
						GTK_LIST_STORE (model), &iter, j, FALSE, -1);
			} else
				gtk_list_store_set (
					GTK_LIST_STORE (model), &iter, j, args[i + j], -1);
		}

		if (editable)
			gtk_list_store_set (
				GTK_LIST_STORE (model), &iter, n_columns, TRUE, -1);

		if (i == MAX_ELEMENTS_BEFORE_SCROLLING) {
			GtkWidget *scrolled_window;
			GtkRequisition rectangle;

			gtk_widget_get_preferred_size (
				GTK_WIDGET (tree_view), &rectangle, NULL);
			scrolled_window = GTK_WIDGET (
				gtk_builder_get_object (builder, "zenity_tree_window"));
			gtk_widget_set_size_request (scrolled_window, -1, rectangle.height);
			gtk_scrolled_window_set_policy (
				GTK_SCROLLED_WINDOW (scrolled_window),
				GTK_POLICY_AUTOMATIC,
				GTK_POLICY_AUTOMATIC);
		}

		i += n_columns;
	}
}

static gboolean
zenity_mid_search_func (GtkTreeModel *model, gint column, const gchar *key,
	GtkTreeIter *iter, gpointer search_data) {
	gchar *iter_string = NULL;
	gtk_tree_model_get (model, iter, column, &iter_string, -1);
	return !(g_strrstr (g_utf8_strdown (iter_string, -1),
				 g_utf8_strdown (key, -1)) != NULL);
}

static void
zenity_cell_edited_callback (GtkCellRendererText *cell,
	const gchar *path_string, const gchar *new_text, gpointer data) {
	GtkTreeModel *model;
	GtkTreePath *path;
	GtkTreeIter iter;
	gint column;

	model = GTK_TREE_MODEL (data);
	path = gtk_tree_path_new_from_string (path_string);

	column = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (cell), "column"));
	gtk_tree_model_get_iter (model, &iter, path);

	gtk_list_store_set (GTK_LIST_STORE (model), &iter, column, new_text, -1);

	gtk_tree_path_free (path);
}

void
zenity_tree (ZenityData *data, ZenityTreeData *tree_data) {
	GtkWidget *dialog;
	GtkWidget *button;
	GObject *tree_view;
	GObject *text;
	GtkTreeViewColumn *column;
	GtkListStore *model;
	GType *column_types;
	GSList *tmp;
	gboolean first_column = FALSE;
	gint i, column_index, n_columns;

	builder = zenity_util_load_ui_file ("zenity_tree_dialog", NULL);

	if (builder == NULL) {
		data->exit_code = zenity_util_return_exit_code (ZENITY_ERROR);
		return;
	}

	separator = g_strcompress (tree_data->separator);

	n_columns = g_slist_length (tree_data->columns);

	if (tree_data->print_column) {
		if (strcmp (g_ascii_strdown (tree_data->print_column, -1), "all") == 0)
			print_all_columns = TRUE;
		else
			print_columns = zenity_tree_extract_column_indexes (
				tree_data->print_column, n_columns);
	} else {
		print_columns = g_new (gint, 2);
		print_columns[0] = (tree_data->radiobox || tree_data->checkbox ? 2 : 1);
		print_columns[1] = 0;
	}

	if (tree_data->hide_column)
		hide_columns = zenity_tree_extract_column_indexes (
			tree_data->hide_column, n_columns);

	if (n_columns == 0) {
		g_printerr (_ ("No column titles specified for List dialog.\n"));
		data->exit_code = zenity_util_return_exit_code (ZENITY_ERROR);
		return;
	}

	if (tree_data->checkbox + tree_data->radiobox + tree_data->imagebox > 1) {
		g_printerr (_ ("You should use only one List dialog type.\n"));
		data->exit_code = zenity_util_return_exit_code (ZENITY_ERROR);
		return;
	}

	gtk_builder_connect_signals (builder, NULL);

	dialog =
		GTK_WIDGET (gtk_builder_get_object (builder, "zenity_tree_dialog"));

	g_signal_connect (G_OBJECT (dialog),
		"response",
		G_CALLBACK (zenity_tree_dialog_response),
		data);

	if (data->dialog_title)
		gtk_window_set_title (GTK_WINDOW (dialog), data->dialog_title);

	if (data->modal)
		gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);

	if (data->extra_label) {
		gint i = 0;
		while (data->extra_label[i] != NULL) {
			gtk_dialog_add_button (
				GTK_DIALOG (dialog), data->extra_label[i], i);
			i++;
		}
	}

	if (data->ok_label) {
		button = GTK_WIDGET (
			gtk_builder_get_object (builder, "zenity_tree_ok_button"));
		gtk_button_set_label (GTK_BUTTON (button), data->ok_label);
	}

	if (data->cancel_label) {
		button = GTK_WIDGET (
			gtk_builder_get_object (builder, "zenity_tree_cancel_button"));
		gtk_button_set_label (GTK_BUTTON (button), data->cancel_label);
	}

	text = gtk_builder_get_object (builder, "zenity_tree_text");

	if (tree_data->dialog_text)
		gtk_label_set_markup (
			GTK_LABEL (text), g_strcompress (tree_data->dialog_text));

	zenity_util_set_window_icon (
		dialog, data->window_icon, ZENITY_IMAGE_FULLPATH ("zenity-list.png"));

	if (data->width > -1 || data->height > -1)
		gtk_window_set_default_size (
			GTK_WINDOW (dialog), data->width, data->height);

	tree_view = gtk_builder_get_object (builder, "zenity_tree_view");

	if (!(tree_data->radiobox || tree_data->checkbox))
		g_signal_connect (tree_view,
			"row-activated",
			G_CALLBACK (zenity_tree_row_activated),
			data);

	/* Create an empty list store */
	model = g_object_new (GTK_TYPE_LIST_STORE, NULL);

	if (tree_data->editable)
		column_types = g_new (GType, n_columns + 1);
	else
		column_types = g_new (GType, n_columns);

	for (i = 0; i < n_columns; i++) {
		/* Have the limitation that the radioboxes and checkboxes are in the
		 * first column */
		if (i == 0 && (tree_data->checkbox || tree_data->radiobox))
			column_types[i] = G_TYPE_BOOLEAN;
		else
			column_types[i] = G_TYPE_STRING;
	}

	if (tree_data->editable)
		column_types[n_columns] = G_TYPE_BOOLEAN;

	if (tree_data->editable)
		gtk_list_store_set_column_types (model, n_columns + 1, column_types);
	else
		gtk_list_store_set_column_types (model, n_columns, column_types);

	gtk_tree_view_set_model (GTK_TREE_VIEW (tree_view), GTK_TREE_MODEL (model));

	if (!(tree_data->radiobox || tree_data->checkbox)) {
		if (tree_data->multi)
			gtk_tree_selection_set_mode (
				gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view)),
				GTK_SELECTION_MULTIPLE);
		else
			gtk_tree_selection_set_mode (
				gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view)),
				GTK_SELECTION_SINGLE);
	} else
		gtk_tree_selection_set_mode (
			gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view)),
			GTK_SELECTION_NONE);

	column_index = 0;

	for (tmp = tree_data->columns; tmp; tmp = tmp->next) {
		if (!first_column) {
			if (tree_data->checkbox || tree_data->radiobox) {
				GtkCellRenderer *cell_renderer;

				cell_renderer = gtk_cell_renderer_toggle_new ();

				if (tree_data->radiobox) {
					g_object_set (
						G_OBJECT (cell_renderer), "radio", TRUE, NULL);
					g_object_set_data (
						G_OBJECT (model), "radio", GINT_TO_POINTER (1));
				}

				g_signal_connect (cell_renderer,
					"toggled",
					G_CALLBACK (zenity_tree_toggled_callback),
					model);

				column = gtk_tree_view_column_new_with_attributes (
					tmp->data, cell_renderer, "active", column_index, NULL);
			} else if (tree_data->imagebox) {
				GtkCellRenderer *cell_renderer =
					gtk_cell_renderer_pixbuf_new ();
				column = gtk_tree_view_column_new_with_attributes (
					tmp->data, cell_renderer, NULL);
				gtk_tree_view_column_set_cell_data_func (
					column, cell_renderer, zenity_load_pixbuf, NULL, NULL);
			} else {
				if (tree_data->editable) {
					GtkCellRenderer *cell_renderer;

					cell_renderer = gtk_cell_renderer_text_new ();
					g_signal_connect (G_OBJECT (cell_renderer),
						"edited",
						G_CALLBACK (zenity_cell_edited_callback),
						gtk_tree_view_get_model (GTK_TREE_VIEW (tree_view)));
					g_object_set_data (G_OBJECT (cell_renderer),
						"column",
						GINT_TO_POINTER (column_index));

					column =
						gtk_tree_view_column_new_with_attributes (tmp->data,
							cell_renderer,
							"text",
							column_index,
							"editable",
							n_columns,
							NULL);
				} else {
					column =
						gtk_tree_view_column_new_with_attributes (tmp->data,
							gtk_cell_renderer_text_new (),
							"text",
							column_index,
							NULL);
				}

				gtk_tree_view_column_set_sort_column_id (column, column_index);
				gtk_tree_view_column_set_resizable (column, TRUE);
			}
			if (zenity_tree_column_is_hidden (1))
				gtk_tree_view_column_set_visible (column, FALSE);

			first_column = TRUE;
		} else {
			if (tree_data->editable) {
				GtkCellRenderer *cell_renderer;

				cell_renderer = gtk_cell_renderer_text_new ();
				g_signal_connect (G_OBJECT (cell_renderer),
					"edited",
					G_CALLBACK (zenity_cell_edited_callback),
					gtk_tree_view_get_model (GTK_TREE_VIEW (tree_view)));
				g_object_set_data (G_OBJECT (cell_renderer),
					"column",
					GINT_TO_POINTER (column_index));

				column = gtk_tree_view_column_new_with_attributes (tmp->data,
					cell_renderer,
					"text",
					column_index,
					"editable",
					n_columns,
					NULL);
			} else {
				column = gtk_tree_view_column_new_with_attributes (tmp->data,
					gtk_cell_renderer_text_new (),
					"text",
					column_index,
					NULL);
			}

			gtk_tree_view_column_set_sort_column_id (column, column_index);
			gtk_tree_view_column_set_resizable (column, TRUE);

			if (zenity_tree_column_is_hidden (column_index + 1))
				gtk_tree_view_column_set_visible (column, FALSE);
		}

		gtk_tree_view_append_column (GTK_TREE_VIEW (tree_view), column);
		column_index++;
	}

	if (tree_data->hide_header)
		gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);

	if (tree_data->radiobox || tree_data->checkbox) {
		if (tree_data->data && *tree_data->data)
			zenity_tree_fill_entries (GTK_TREE_VIEW (tree_view),
				tree_data->data,
				n_columns,
				TRUE,
				tree_data->editable);
		else
			zenity_tree_fill_entries_from_stdin (GTK_TREE_VIEW (tree_view),
				n_columns,
				TRUE,
				tree_data->editable);
	} else {
		if (tree_data->data && *tree_data->data)
			zenity_tree_fill_entries (GTK_TREE_VIEW (tree_view),
				tree_data->data,
				n_columns,
				FALSE,
				tree_data->editable);
		else
			zenity_tree_fill_entries_from_stdin (GTK_TREE_VIEW (tree_view),
				n_columns,
				FALSE,
				tree_data->editable);
	}

	zenity_util_show_dialog (dialog, data->attach);

	if (tree_data->mid_search)
		gtk_tree_view_set_search_equal_func (GTK_TREE_VIEW (tree_view),
			(GtkTreeViewSearchEqualFunc) zenity_mid_search_func,
			model,
			NULL);

	if (data->timeout_delay > 0) {
		g_timeout_add_seconds (data->timeout_delay,
			(GSourceFunc) zenity_util_timeout_handle,
			dialog);
	}

	gtk_main ();

	g_object_unref (builder);
}

static void
zenity_tree_dialog_get_selected (GtkTreeModel *model, GtkTreePath *path_buf,
	GtkTreeIter *iter, GtkTreeView *tree_view) {
	GValue value = {
		0,
	};
	gint n_columns, i;

	n_columns =
		GPOINTER_TO_INT (g_object_get_data (G_OBJECT (tree_view), "n_columns"));

	if (print_all_columns) {
		for (i = 0; i < n_columns; i++) {
			gtk_tree_model_get_value (model, iter, i, &value);

			selected = g_slist_append (selected, g_value_dup_string (&value));
			g_value_unset (&value);
		}
		return;
	}

	for (i = 0; print_columns[i] != 0; i++) {
		gtk_tree_model_get_value (model, iter, print_columns[i] - 1, &value);

		selected = g_slist_append (selected, g_value_dup_string (&value));
		g_value_unset (&value);
	}
}

static gboolean
zenity_tree_dialog_toggle_get_selected (GtkTreeModel *model, GtkTreePath *path,
	GtkTreeIter *iter, GtkTreeView *tree_view) {
	GValue toggle_value = {
		0,
	};
	gint n_columns, i;

	n_columns =
		GPOINTER_TO_INT (g_object_get_data (G_OBJECT (tree_view), "n_columns"));

	gtk_tree_model_get_value (model, iter, 0, &toggle_value);

	if (g_value_get_boolean (&toggle_value)) {
		GValue value = {
			0,
		};

		if (print_all_columns) {
			for (i = 1; i < n_columns; i++) {
				gtk_tree_model_get_value (model, iter, i, &value);

				selected =
					g_slist_append (selected, g_value_dup_string (&value));
				g_value_unset (&value);
			}
			g_value_unset (&toggle_value);
			return FALSE;
		}

		for (i = 0; print_columns[i] != 0; i++) {
			gtk_tree_model_get_value (
				model, iter, print_columns[i] - 1, &value);

			selected = g_slist_append (selected, g_value_dup_string (&value));
			g_value_unset (&value);
		}
	}

	g_value_unset (&toggle_value);

	return FALSE;
}

static void
zenity_tree_dialog_output (void) {
	GObject *tree_view;
	GtkTreeSelection *selection;
	GtkTreeModel *model;

	tree_view = gtk_builder_get_object (builder, "zenity_tree_view");
	model = gtk_tree_view_get_model (GTK_TREE_VIEW (tree_view));

	if (gtk_tree_model_get_column_type (model, 0) == G_TYPE_BOOLEAN)
		gtk_tree_model_foreach (model,
			(GtkTreeModelForeachFunc) zenity_tree_dialog_toggle_get_selected,
			GTK_TREE_VIEW (tree_view));
	else {
		selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
		gtk_tree_selection_selected_foreach (selection,
			(GtkTreeSelectionForeachFunc) zenity_tree_dialog_get_selected,
			GTK_TREE_VIEW (tree_view));
	}

	GSList *tmp;

	for (tmp = selected; tmp; tmp = tmp->next) {
		if (tmp->next != NULL) {
			g_print ("%s%s", (gchar *) tmp->data, separator);
		} else
			g_print ("%s\n", (gchar *) tmp->data);
	}

	g_free (print_columns);
	g_free (hide_columns);
	g_free (separator);
	g_slist_foreach (selected, (GFunc) g_free, NULL);
	selected = NULL;
}

static void
zenity_tree_dialog_response (GtkWidget *widget, int response, gpointer data) {
	ZenityData *zen_data = data;

	switch (response) {
		case GTK_RESPONSE_OK:
			zenity_tree_dialog_output ();
			zenity_util_exit_code_with_data (ZENITY_OK, zen_data);
			break;

		case GTK_RESPONSE_CANCEL:
			zen_data->exit_code = zenity_util_return_exit_code (ZENITY_CANCEL);
			break;

		case ZENITY_TIMEOUT:
			zenity_tree_dialog_output ();
			zen_data->exit_code = zenity_util_return_exit_code (ZENITY_TIMEOUT);
			break;

		default:
			if (zen_data->extra_label &&
				response < g_strv_length (zen_data->extra_label))
				printf ("%s\n", zen_data->extra_label[response]);
			zen_data->exit_code = zenity_util_return_exit_code (ZENITY_ESC);
			break;
	}
	if (channel != NULL &&
		g_io_channel_get_flags (channel) & G_IO_FLAG_IS_READABLE)
		g_io_channel_shutdown (channel, TRUE, NULL);

	gtk_main_quit ();
}

static void
zenity_tree_row_activated (GtkTreeView *tree_view, GtkTreePath *tree_path,
	GtkTreeViewColumn *tree_col, gpointer data) {
	ZenityData *zen_data = data;

	zenity_tree_dialog_output ();
	zen_data->exit_code = zenity_util_return_exit_code (ZENITY_OK);
	gtk_main_quit ();
}

static gboolean
zenity_tree_column_is_hidden (gint column_index) {
	gint i;

	if (hide_columns != NULL)
		for (i = 0; hide_columns[i] != 0; i++)
			if (hide_columns[i] == column_index)
				return TRUE;

	return FALSE;
}

static gint *
zenity_tree_extract_column_indexes (char *indexes, int n_columns) {
	char **tmp;
	gint *result;
	gint i, j, index;

	tmp = g_strsplit (indexes, PRINT_HIDE_COLUMN_SEPARATOR, 0);

	result = g_new (gint, 1);

	for (j = i = 0; tmp[i] != NULL; i++) {
		index = atoi (tmp[i]);

		if (index > 0 && index <= n_columns) {
			result[j] = index;
			j++;
			result = g_renew (gint, result, j + 1);
		}
	}
	result[j] = 0;

	g_strfreev (tmp);

	return result;
}