Problem
You have an array:
$list = array( array ('id' => '101', 'parent' => '0', 'data' => 'data0'), array ('id' => '102', 'parent' => '101', 'data' => 'data1'), array ('id' => '103', 'parent' => '0', 'data' => 'data2'), array ('id' => '104', 'parent' => '0', 'data' => 'data3'), array ('id' => '105', 'parent' => '104', 'data' => 'data4'), array ('id' => '106', 'parent' => '105', 'data' => 'data5') );
You want to display this array as a tree structure as shown below:
Solution
- Set up a GtkTreestore to store the tree structure.
- Create a GtkTreeview and attach the treestore to the treeview.
- The treeview will automatically display the tree structure from the treeview.
Sample Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 68 69 70 71 72 73 74 80 81 82 | <?php $window = new GtkWindow(); $window->set_size_request(400, 200); $window->connect_simple('destroy', array('Gtk','main_quit')); $window->add($vbox = new GtkVBox()); // display title $title = new GtkLabel("Display a tree structure from array"); $title->modify_font(new PangoFontDescription("Times New Roman Italic 10")); $title->modify_fg(Gtk::STATE_NORMAL, GdkColor::parse("#0000ff")); $title->set_size_request(-1, 40); $vbox->pack_start($title, 0, 0); $vbox->pack_start(new GtkLabel(), 0, 0); $data = array( array ('id' => '101', 'parent' => '0', 'data' => 'data0'), array ('id' => '102', 'parent' => '101', 'data' => 'data1'), array ('id' => '103', 'parent' => '0', 'data' => 'data2'), array ('id' => '104', 'parent' => '0', 'data' => 'data3'), array ('id' => '105', 'parent' => '104', 'data' => 'data4'), array ('id' => '106', 'parent' => '105', 'data' => 'data5') ); display_table($vbox, $data); $window->show_all(); Gtk::main(); function display_table($vbox, $data) { // Set up a scroll window $scrolled_win = new GtkScrolledWindow(); $scrolled_win->set_policy( Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC); $vbox->pack_start($scrolled_win); // Creates the list store if (defined("GObject::TYPE_STRING")) { $model = new GtkTreeStore(GObject::TYPE_LONG, GObject::TYPE_STRING, GObject::TYPE_STRING); // note 1 } else { $model = new GtkTreeStore(Gtk::TYPE_LONG, Gtk::TYPE_STRING, Gtk::TYPE_STRING); // note 1 } $field_header = array('id', 'title', 'data'); // Creates the view to display the list store $view = new GtkTreeView($model); // note 2 $scrolled_win->add($view); // Creates the columns for ($col=0; $col<count($field_header); ++$col) { // note 3 $cell_renderer = new GtkCellRendererText(); $column = new GtkTreeViewColumn($field_header[$col], $cell_renderer, 'text', $col); $view->append_column($column); } // pupulates the data $nodes = array(); $nodes[0] = null; // root foreach($data as $item) { $id = $item['id']; $parent = $item['parent']; $data = $item['data']; $nodes[$id] = $model->append($nodes[$parent], array($id, "this is id $id", $data)); // note 4 } $view->expand_all(); } ?> |
Output
As shown above.Explanation
- Sets up the treestore to store the data. Here it sets three fields. The first one is integer that stores the id. The second and third are strings.
- Creates a GtkTreeview. It is here that you bind the model to the treeview.
- Sets up the treeview columns.
- Loops through the data list and appends the data one by by to the tree structure. Note that
$nodes
stores the GtkTreeiter of each node. You can view this as a pointer to the node.
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