Sample Code 74: How to display directory tree using GtkTreeView - Part 1? |
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Written by kksou
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Wednesday, 25 October 2006 |
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Problem You would like to display a directory tree (or folder contents) using a GtkTreeView 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.
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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 1");
$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); // note 1
} else {
$model = new GtkTreeStore(Gtk::TYPE_STRING); // note 1
}
// 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);
$file_chooser_button->connect('selection-changed',
'on_selection_changed'); // note 2
on_selection_changed($file_chooser_button); // note 3
$hbox->pack_start($file_chooser_button, 0, 0);
// 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); // note 4
$scrolled_win->add($view);
$view->set_size_request(400, 320);
//set up treeview columns
$cell_renderer = new GtkCellRendererText();
$view->append_column(new GtkTreeViewColumn('Folders / Files',
$cell_renderer, 'text', 0)); // note 5
//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); // note 6
}
function populate_tree($folder) { // note 6
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- Note that this is only 70% of the sample code. You have to be a registered member to see the entire sample code. Please login or register.
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- Have some doubt about the registration? Please read this forum article.
Explanation
- Set up the tree model. Here only one field is required - a string to store the folder name or filename.
- Inform us when the user has finished selecting a folder.
- Force an update of the model and treeview during the first pass. Try comment this out and you will know what I mean.
- Binds the model to the treeview.
- There's only one column - to display the folder name or filename.
- The function
populate_tree simply reads the entire folder content and stuff it in the tree model.
- Add the new folder or filename to the tree model.
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May 04, 2008 6:06pm