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Problem You have displayed a directory tree with folder icons using a GtkTreeView in Part 2 as shown below:
You would now like to add in selection checkboxes. Users can select the folders and files by checking the checkboxes as shown below:
Solution
Sample Code Note 1: If you select "C:\", the program will run, but it will take a long time. You will see the processing, though, in the command window.
Note 2: On windows, you may see a warning "Gtk-WARNING: Could not find the icon 'stock_unknown'. The 'hicolor' theme
was not found either, perhaps you need to install it." This is from the GtkFileChooserButton. It's just a warning. You may ignore it, or go ahead and install it.
Note 3: The following image files are required by the sample code below. Please save a copy of the image files and put them in the same directory where you store the sample code.
 | folder_open.gif |
 | folder_closed.gif |
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| <?php
$window = new GtkWindow();
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("Display folder contents in GtkTreeView - Part 3\n".
" add selection box");
$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);
$vbox->pack_start($hbox = new GtkHBox());
$hbox->pack_start(new GtkLabel('Click to select a folder: '), 0, 0);
// set up model
if (defined("GObject::TYPE_STRING")) {
$model = new GtkTreeStore(GObject::TYPE_STRING, GObject::TYPE_STRING,
GObject::TYPE_BOOLEAN);
} else {
$model = new GtkTreeStore(Gtk::TYPE_STRING, Gtk::TYPE_STRING,
Gtk::TYPE_BOOLEAN);
}
// set up file chooser button
$file_chooser_button = new GtkFileChooserButton('Select the Folder',
Gtk::FILE_CHOOSER_ACTION_SELECT_FOLDER);
$file_chooser_button->set_size_request(320, -1);
$file_chooser_button->connect('selection-changed', 'on_selection_changed');
on_selection_changed($file_chooser_button);
$hbox->pack_start($file_chooser_button, 0, 0);
$vbox->pack_start(new GtkLabel());
$process_button = new GtkButton('Process Selected Folder/Files');
$process_button->connect('clicked', 'on_process_button', $model);
$vbox->pack_start($hbox=new GtkHBox(), 0, 0);
$hbox->pack_start($process_button, 0, 0);
$vbox->pack_start(new GtkLabel());
// set up scroll window
$scrolled_win = new GtkScrolledWindow();
$scrolled_win->set_policy( Gtk::POLICY_AUTOMATIC,
Gtk::POLICY_AUTOMATIC);
$vbox->pack_start($scrolled_win);
// set up treeview
$view = new GtkTreeView($model);
$scrolled_win->add($view);
$view->set_size_request(400, 320);
//set up treeview columns
$column = new GtkTreeViewColumn();
// for image
$cell_renderer = new GtkCellRendererPixbuf(); // note 1
$column->pack_start($cell_renderer, false);
$cell_renderer->set_property('pixbuf-expander-open',
GdkPixbuf::new_from_file('folder_open.gif'));
$cell_renderer->set_property('pixbuf-expander-closed',
GdkPixbuf::new_from_file('folder_closed.gif'));
// for selection checkbox
$cell_renderer = new GtkCellRendererToggle(); // note 2
$cell_renderer->set_property('activatable', true);
$column->pack_start($cell_renderer, false);
$column->set_attributes($cell_renderer, 'active', 2); // uses col 2 of model
$cell_renderer->connect('toggled', 'on_toggle', $model); // toggles the checkbox
// for filename
$cell_renderer = new GtkCellRendererText(); // note 3
$column->pack_start($cell_renderer, true);
$column->set_attributes($cell_renderer, 'text', 0); // uses col 0 of model
$view->append_column($column);
$column->set_title('Folders / Files');
//display it
$window->show_all();
Gtk::main();
function on_selection_changed($button) {
$folder = $button->get_current_folder();
echo "new folder: $folder\n";
populate_tree($folder);
}
function populate_tree($folder) {
global $model;
$model->clear();
$root = $folder;
$dir_list = array($root);
$nodes = array();
$nodes[$root] = null;
while(count($dir_list)>0) {
$dir = array_shift($dir_list);
echo "folder = $dir\n";
// add the directories first
if ($handle = opendir($dir)) {
while (false !== ($file = readdir($handle))) {
if ($file != "." && $file != "..") {
$fullpath = $dir.'/'.$file;
if (is_dir($fullpath)) {
$nodes[$fullpath] = $model->append($nodes[$dir],
array($file, $fullpath, 0)); // note 4
array_push($dir_list, $fullpath);
}
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Explanation The above sample code is based on How to display directory tree using GtkTreeView - Part 2 - add folder icon?
What's new here:
- Set up the GtkCellRendererPixbuf.
- Set up the GtkCellRendererToggle for the selection checkbox.
- Set up the GtkCellRenderer.
- Note that we add the filename to col 0 of model and the fullpath name to col 1 of model - so that when we process user selection, we have both the filename and fullpath name of the selected folders/files.
Note that we also set 0 to col 2 of model - this sets the default checkbox in the unchecked status.
- Please refer to How to use GtkCellRendererToggle - Part 2 - process selection?
- Uses GtkTreemodel::foreach() to loop through each row of the treeview model to check if it is selected.
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