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Problem In Part 1, you have used a GtkTreeModelSort to sort and retrieve the sorted rows.
Instead of using one GtkTreeModelSort, you can use multiple GtkTreeModelSort's as shown below.
Solution
- In this example, we create four GtkTreeModelSort's on top of the original model.
- Each time the user wants to change the sorting order, we simply switch to a different modelsort using GtkCellview::set_model()
Sample Code 1
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| <?php
$window = new GtkWindow();
$window->set_size_request(400, 312);
$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
$menu_definition = array(
'_File' => array('_Quit|Q'),
'_Sort By' => array('Row#|0', 'Description|1', 'Qty|2', 'Price|3'),
'Output' => array('Output Sorted Data|W')
);
setup_menu($vbox, $menu_definition);
// display title
$title = new GtkLabel("Output Sorted Model in Treeview - Part 2\n".
"Use multiple GtkTreeModelSort");
$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);
$title->set_justify(Gtk::JUSTIFY_CENTER);
$alignment = new GtkAlignment(0.5, 0.5, 0, 0);
$alignment->add($title);
$vbox->pack_start($alignment, 0, 0);
$vbox->pack_start(new GtkLabel("Ctrl-0: sort by row #\n".
"Ctrl-1: sort by Description\n".
"Ctrl-2: sort by Qty\n".
"Ctrl-3: sort by Price\n".
"Ctrl-W: output sorted model"), 0, 0);
$vbox->pack_start(new GtkLabel(), 0, 0); // add a small gap
// the 2D table
$data = array(
array('row0', 'item 42', 2, 3.1, 1),
array('row1', 'item 36', 20, 6.21, 1),
array('row2', 'item 21', 8, 9.36, 1),
array('row3', 'item 10', 11, 12.4, 1),
array('row4', 'item 7', 5, 15.5, 1),
array('row5', 'item 4', 17, 18.6, 1),
array('row6', 'item 3', 20, 21.73, 1));
display_table ($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, $view;
if (defined("GObject::TYPE_STRING")) {
$model = new GtkListStore(GObject::TYPE_STRING, GObject::TYPE_STRING,
GObject::TYPE_LONG, GObject::TYPE_DOUBLE, GObject::TYPE_BOOLEAN);
} else {
$model = new GtkListStore(Gtk::TYPE_STRING, Gtk::TYPE_STRING,
Gtk::TYPE_LONG, Gtk::TYPE_DOUBLE, Gtk::TYPE_BOOLEAN);
}
$field_header = array('Row #', 'Description', 'Qty', 'Price');
$field_justification = array(0.0, 0.0, 0.5, 1.0);
// setup GtkTreeModelSort's
global $modelsort0, $modelsort1, $modelsort2, $modelsort3;
$modelsort0 = new GtkTreeModelSort($model); // note 1
$modelsort0->set_sort_column_id(0, Gtk::SORT_ASCENDING);
$modelsort1 = new GtkTreeModelSort($model); // note 1
$modelsort1->set_sort_column_id(1, Gtk::SORT_ASCENDING);
$modelsort2 = new GtkTreeModelSort($model); // note 1
$modelsort2->set_sort_column_id(2, Gtk::SORT_ASCENDING);
$modelsort3 = new GtkTreeModelSort($model); // note 1
$modelsort3->set_sort_column_id(3, Gtk::SORT_ASCENDING);
// 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);
}
// setup selection
$selection = $view->get_selection();
$selection->connect('changed', 'on_selection');
}
// self-defined function to format the price column
function format_col($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";
}
// 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) {
$accel_key = '';
} else {
list($submenu, $accel_key) = explode('|', $submenu);
}
if (is_array($submenu)) { // set up radio menus
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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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Explanation We make use of the code from Part 1.
What's new here:
- Create four GtkTreeModelSort's on top of the original model.
- Switch to the corresponding modelsort based on user's selection.
- Output the sorted rows of the existing model.
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