Sample Code 503: How to setup interactive search in GtkTreeView for PHP GTK v2.0 - Part 4 - automatically hide after 3 seconds? |
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Written by kksou
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Tuesday, 03 June 2008 |
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Problem In How to setup interactive search in GtkTreeView for PHP GTK v2.0 - Part 1 - non OOP version? I showed you how to set up an interactive search on the windows platform using the latest PHP-GTK v2.0 and v2.0.1.
In this Part 4, I added one more enhancement: the interactive search box will automatically disappear after 3 seconds of inactivity (just like the default interactive search), as shown below:
Solution Here are the steps to make this work:
- Use a variable e.g.
$start_time to keep track of the time the interactive search first started.
- Use Gtk::timeout_add() to allow us to check the elapsed time every 1 second.
- When the elapsed time is more than 3 seconds, we destroy the interactive search box.
- If the user enters something or clicks somewhere in the search field, we need to update the
$start_time accordingly.
- Don't forget to use Gtk::timeout_remove() to remove the timeout event.
Sample Code Important Note: This only works for PHP-GTK v2.0 (or PHP-GTK2 compliled with gtk+ v2.12 and above. If you are using an older version, for linux, you may follow the step-by-step instructions to recompile php-gtk2 with gtk+ v2.12. For windows, please refer to How to install php gtk2 on windows?
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| <?php
$window = new GtkWindow();
$window->set_title($argv[0]);
$window->set_size_request(400, 260);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("Interactive search in GtkTreeView for PHP-GTK v2.0\n".
" Part 4 - hide the search box after 3 seconds");
$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);
$vbox->pack_start(new GtkLabel(
'Just start typing in treeview to activate interactive search'), 0);
$vbox->pack_start(new GtkLabel(
'The search box will automatically hide after three seconds'), 0);
$vbox->pack_start(new GtkLabel('Note: Search column is the Qty column'), 0);
// the 2D table
$data = array(
array('row0', 'item 42', 2, 3.1),
array('row1', 'item 36', 20, 6.21),
array('row2', 'item 21', 8, 9.36),
array('row3', 'item 10', 11, 12.4),
array('row4', 'item 7', 41, 15.5),
array('row5', 'item 4', 72, 18.6),
array('row6', 'item 3', 93, 21.73));
$view = display_table($vbox, $data);
$view->set_enable_search(false);
$view->connect('start-interactive-search', 'on_search_start');
$view->connect('button-press-event', 'on_buttonpress');
$view->connect('key-press-event', 'on_keypress');
$searchbox_on = 0;
$window->show_all();
Gtk::main();
function display_table($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 GtkListStore(GObject::TYPE_STRING, GObject::TYPE_STRING,
GObject::TYPE_LONG, GObject::TYPE_DOUBLE);
} else {
$model = new GtkListStore(Gtk::TYPE_STRING, Gtk::TYPE_STRING,
Gtk::TYPE_LONG, Gtk::TYPE_DOUBLE);
}
$field_header = array('Row #', 'Description', 'Qty', 'Price');
$field_justification = array(0.0, 0.0, 0.5, 1.0);
// 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();
$cell_renderer->set_property("xalign", $field_justification[$col]);
$column = new GtkTreeViewColumn($field_header[$col],
$cell_renderer, 'text', $col);
$column->set_alignment($field_justification[$col]);
$column->set_sort_column_id($col);
// set the header font and color
$label = new GtkLabel($field_header[$col]);
$label->modify_font(new PangoFontDescription("Arial Bold"));
$label->modify_fg(Gtk::STATE_NORMAL, GdkColor::parse("#0000FF"));
$column->set_widget($label);
$label->show();
// setup self-defined function to display alternate row color
$column->set_cell_data_func($cell_renderer, "format_col", $col);
$view->append_column($column);
}
// pupulates the data
for ($row=0; $row<count($data); ++$row) {
$values = array();
for ($col=0; $col<count($data[$row]); ++$col) {
$values[] = $data[$row][$col];
}
$model->append($values);
}
$selection = $view->get_selection();
$selection->connect('changed', 'on_selection');
return $view;
}
// self-defined function to format the price column
function format_col($column, $cell, $model, $iter, $col_num) {
$path = $model->get_path($iter); // get the current path
$row_num = $path[0]; // get the row number
if ($col_num==3) {
$amt = $model->get_value($iter, 3);
$cell->set_property('text', '$'.number_format($amt,2));
}
$row_color = ($row_num%2==1) ? '#dddddd' : '#ffffff';
$cell->set_property('cell-background', $row_color);
}
// the function that is called when user selects a row
function on_selection($selection) {
list($model, $iter) = $selection->get_selected();
if ($iter==null) return;
$desc = $model->get_value($iter, 1);
$qty = $model->get_value($iter, 2);
$price = $model->get_value($iter, 3);
print "You have selected $desc: $qty ($price)\n";
}
function on_search_start($view) {
global $searchbox_on;
if (!$searchbox_on) interactive_search($view);
}
function interactive_search($view, $key='') {
global $searchbox_on;
$searchbox_on = 1;
global $search_win;
$search_win = new GtkWindow();
$search_win->add($vbox = new GtkVBox());
$search_win->set_modal(0);
$search_win->set_decorated(0);
$vbox->pack_start($frame = new GtkFrame(), 0);
$frame->add($search_entry = new GtkEntry());
$search_entry->connect('key-press-event', 'on_entry_keypress');
$search_entry->connect('button-press-event', 'on_entry_buttonpress');
$view->set_search_entry($search_entry);
$view->set_search_column(2);
$search_entry->set_text($key);
$search_win->show_all();
set_searchwin_pos($search_entry);
$search_entry->set_position(-1);
global $timeout_handle, $start_time;
$start_time = microtime(1); // note 1
$timeout_handle = Gtk::timeout_add(1000, 'check_idle'); // note 2
}
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Explanation The code above is extended from that of How to setup interactive search in GtkTreeView for PHP GTK v2.0 - Part 3 - start on any keypress?
What's new here:
- Take note of the start time in the global variable
$start_time.
- Add a timeout event that will call the function
check_idle() once every 1 second.
- Check if the time elapsed is more than 3 seconds.
- Remove the timeout event.
- Destroy the search box.
- Each time the user typed something, we update the start time accordingly.
- Each time the user clicks somewhere in the search field, we also update the start time accordingly.
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