<?php

# author : Marc Quinton - november 2006.
# require php-gtk2
#
# this script is based on Ron Tarrant tutorial on this page :
# http://www.kksou.com/php-gtk2/articles/display-directory-tree-using-GtkTreeView---Part-2---add-folder-icon.php
# http://www.kksou.com/php-gtk2/articles/display-directory-tree-using-GtkTreeView---Part-1.php
#

class PhpGtkDirectoryTree extends GtkVbox{

	protected $model;
	protected $scrolled_win;
	protected $treeview;
	protected $column;
	# protected $cell_render;

	protected $icon_folder_open;
	protected $icon_folder_closed;

	protected $title;

	protected $trace;

	function __construct(){

		parent::__construct();

		$this->icon_folder_open = 'folder_open.gif';
		$this->icon_folder_closed = 'folder_closed.gif';

		$this->trace = false;

		$this->build();
		$this->add_signals();
	}

	function build(){
		$this->model = new GtkTreeStore(Gtk::TYPE_STRING, Gtk::TYPE_STRING); # store file, path

		$this->scrolled_win = new GtkScrolledWindow();
		$this->scrolled_win->set_policy( Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);

		$this->add($this->scrolled_win);

		
		// set up treeview
		$this->treeview = new GtkTreeView($this->model);
		$this->scrolled_win->add($this->treeview);

		//set up treeview columns
		$this->column = new GtkTreeViewColumn();

		// for image
		$cell_renderer = new GtkCellRendererPixbuf();
		$this->column->pack_start($cell_renderer, false);

		if(file_exists($this->icon_folder_open) && file_exists($this->icon_folder_open)){
			$cell_renderer->set_property('pixbuf-expander-open', GdkPixbuf::new_from_file($this->icon_folder_open));
			$cell_renderer->set_property('pixbuf-expander-closed', GdkPixbuf::new_from_file($this->icon_folder_closed)); 
		} else
			trigger_error("PhpGtkDirectoryTree : icon file for folder not found", E_USER_WARNING);
			

		// for filename
		$cell_renderer = new GtkCellRendererText();
		$this->column->pack_start($cell_renderer, true);
		$this->column->set_attributes($cell_renderer, 'text', 0); 

		$this->treeview->append_column($this->column);
	}

	function add_signals(){
		$signals = array(
			'row-collapsed', 
			'row-expanded', 
			'move-cursor', 
			'row-activated', 
			'select-cursor-parent', 
			'select-all', 
			'select-cursor-row',
			'set-scroll-adjustments',
			'start-interactive-search',
			'test-collapse-row',
			'test-expand-row',
			'toggle-cursor-row',
			'unselect-all', 
			'columns-changed'
			);
		foreach($signals as $sig)
			$this->treeview->connect_simple($sig, array($this,'treeview_signals'),  $sig);

		# connect signal 'changed' to GtkTreeSelection object
		$this->treeview->get_selection()->connect_simple('changed', array($this,'selection_changed'));
	}

	# http://www.pygtk.org/pygtk2reference/class-gtktreeview.html
	function treeview_signals($userdata){
		$signal_type = $userdata;
		echo "treeview_signals ($userdata)\n";

		switch($signal_type){
		case 'row-activated':
			$selection = $this->treeview->get_selection();  # GTkTreeSelection
			if(is_object($selection))
				echo "selection class : " . get_class($selection) . "\n";
			break;
		}
	}
	function selection_changed(){
		echo "selection changed\n";
		# list($tree_store, $path) = $this->treeview->get_selection()->get_selected_rows();
		# $this->model->foreach(array($this, 'selection_changed_iter'));
		$this->treeview->get_selection()->selected_foreach(array($this, 'selection_foreach'));
	}

	function selection_foreach($model, $path, $iter){
		$file = $model->get_value($iter, 0);
		$path = $model->get_value($iter, 1);
		echo "selection_foreach() : $file - $path\n";
		
	}

	function open_directory($folder){

		if(!is_dir($folder)){
			trigger_error("PhpGtkDirectoryTree : directory not found", E_USER_WARNING);
			return false;
		}
		$this->model->clear();
		$root = $folder;
		$dir_list = array($root);
		$nodes = array();
		$nodes[$root] = null;
	
		while(count($dir_list)>0) {
			$dir = array_shift($dir_list);

			$this->trace("folder = $dir\n");

			// add the directories first note 4
			if ($handle = opendir($dir)) {
				while (false !== ($file = readdir($handle))) {
					if ($file != "." && $file != "..") {
						$fullpath = $dir.'/'.$file;
						if (is_dir($fullpath)) {
							$nodes[$fullpath] = $this->model->append($nodes[$dir], array($file, $dir));
							array_push($dir_list, $fullpath);
						}
					}
				}
				closedir($handle);
			}
	
			$num_files = 0;
			// then add the files note 5
			if ($handle = opendir($dir)) {
				while (false !== ($file = readdir($handle))) {
					if ($file != "." && $file != "..") {
						$fullpath = $dir.'/'.$file;
						if (!is_dir($fullpath)) {
							$nodes[$fullpath] = $this->model->append($nodes[$dir], array($file, $dir));
							++$num_files;
						}
					}
				}
				closedir($handle);
			}
	
			if ($num_files==0) $nodes[$fullpath] = $this->model->append($nodes[$dir], array('', '')); // note 6
		}
	}

	function set_title($title){
		$this->title = $title;
		$this->column->set_title($title);
	}
	function trace($txt){
		if($this->trace)
			echo "$txt";
	}

	function debug($txt, $obj){
		if(is_object($obj))
			echo "$txt : " . get_class($obj) . "\n";
		else{
			echo "$txt : " ; print_r($obj);
		}
	}
}

?>