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Problem You would like to selectively display nodes in a GtkTreeStore using GtkTreeModelFilter as shown below:
Solution We make use of the same technique as outlined in How to selectively display rows in GtkTreeView with GtkTreeModelFilter - Part 2?
Sample Code
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| <?php
$window = new GtkWindow();
$window->set_title($argv[0]);
$window->set_size_request(400, 306);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
$accel_group = new GtkAccelGroup();
$window->add_accel_group($accel_group);
// define menu definition
$menu_definition = array(
'_File' => array('_Quit|Q'),
'_Filter' => array('Show All Rows|1',
'Show widgets containing the word button|2',
'Show widgets containing the word box|3'),
);
setup_menu($vbox, $menu_definition);
// display title
$title = new GtkLabel("Selectively display nodes in GtkTreeStore\n".
" with GtkTreeModelFilter");
$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);
$vbox->pack_start(new GtkLabel("Press Ctrl-1 to show all rows\n".
"Ctrl-2 to show widgets containing the word button\n".
"Ctrl-3 to show widgets containing the word box"), 0);
$vbox->pack_start(new GtkLabel(), 0);
$data = array(
array ('id' => 'GtkButton', 'parent' => '0'),
array ('id' => 'GtkColorButton', 'parent' => 'GtkButton'),
array ('id' => 'GtkToggleButton', 'parent' => 'GtkButton'),
array ('id' => 'GtkFontButton', 'parent' => 'GtkButton'),
array ('id' => 'GtkBox', 'parent' => '0'),
array ('id' => 'GtkButtonBox', 'parent' => 'GtkBox'),
array ('id' => 'GtkVButtonBox', 'parent' => 'GtkButtonBox'),
array ('id' => 'GtkHButtonBox', 'parent' => 'GtkButtonBox'),
array ('id' => 'GtkVBox', 'parent' => 'GtkBox'),
array ('id' => 'GtkFontSelection', 'parent' => 'GtkVBox'),
array ('id' => 'GtkColorSelection', 'parent' => 'GtkVBox'),
array ('id' => 'GtkHBox', 'parent' => 'GtkBox'),
array ('id' => 'test1', 'parent' => '0'),
array ('id' => 'button_test1', 'parent' => 'test1'),
array ('id' => 'box_test1', 'parent' => 'test1'),
array ('id' => 'button_test_root', 'parent' => '0'),
array ('id' => 'button_test2', 'parent' => 'button_test_root'),
array ('id' => 'box_test2', 'parent' => 'button_test_root'),
);
display_table($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
global $model, $modelfilter, $view;
if (defined("GObject::TYPE_STRING")) {
$model = new GtkTreeStore(GObject::TYPE_STRING,
GObject::TYPE_BOOLEAN, GObject::TYPE_BOOLEAN);
} else {
$model = new GtkTreeStore(Gtk::TYPE_STRING,
Gtk::TYPE_BOOLEAN, Gtk::TYPE_BOOLEAN);
}
$field_header = array('Widget');
// setup GtkTreeModelFilter1
$modelfilter[1] = new GtkTreeModelFilter($model); // note 1
$modelfilter[1]->set_visible_column(1);
// setup GtkTreeModelFilter2
$modelfilter[2] = new GtkTreeModelFilter($model); // note 2
$modelfilter[2]->set_visible_column(2);
// setup GtkTreeModelSort
global $current_filter;
$modelfilter[0] = $model;
$current_filter = 0;
// Creates the view to display the list store
$view = new GtkTreeView($model);
$scrolled_win->add($view);
// Creates the columns
for ($col=0; $col<count($field_header); ++$col) {
$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'];
// sets the flag for filter 1
$filter1_flag = (preg_match('/button/i', $id)) ? 1 : 0;
// sets the flag for filter 2
$filter2_flag = (preg_match('/box/i', $id)) ? 1 : 0;
$nodes[$id] = $model->append($nodes[$parent],
array($id, $filter1_flag, $filter2_flag));
}
$view->expand_all();
if (method_exists($view, 'set_enable_tree_lines'))
$view->set_enable_tree_lines(1);
// setup GtkTreeModelSort
}
// setup menu
function setup_menu($vbox, $menus) {
global $accel_group;
$menubar = new GtkMenuBar();
$vbox->pack_start($menubar, 0, 0);
foreach($menus as $toplevel => $sublevels) {
$menubar->append($top_menu = new GtkMenuItem($toplevel));
$menu = new GtkMenu();
$top_menu->set_submenu($menu);
foreach($sublevels as $submenu) {
if (strpos("$submenu", '|') === false) {
|
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Explanation The above code is based on How to display a tree structure from array? and How to selectively display rows in GtkTreeView with GtkTreeModelFilter - Part 2?.
We also make use of the codes in How to set up menu and radio menu - Part 3 - add accelerators? to display a menu with accelerators so that we can use Ctrl-1, Ctrl-2 and Ctrl-3 to switch between the three views.
What's new here:
- Set up model filter 1.
- Set up model filter 2.
- Switch to respective filter accordingly.
Note
Did you notice that when the filter is on (when you press Ctrl-2 or Ctrl-3), test1 did not appear on either one. When you apply modelfilter to a tree structure, if a parent node is not selected, none of its descendents will appear.
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