Problem
In Part 1, we have allowed user to edit directly in the treeview. However, if you click on any field in the last column (Price), and just press return, you will find that the price changed to $0.00. This is because of the '$' sign in front of the number.
We'll fix this in this article as shown below:
Solution
- Set up treeview to allow editing as described in Part 1.
- In the signal handler for the signal GtkCellRendererText::edited, remove any '$' and ',' before updating the value back to the model. This is because for the model, the last column (price) is defined as a double. Any '$' or ',' will make the value 0.
Sample Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 119 120 121 122 123 124 126 127 128 129 139 140 | <?php $window = new GtkWindow(); $window->set_size_request(400, 200); $window->connect_simple('destroy', array('Gtk','main_quit')); $window->add($vbox = new GtkVBox()); // display title $title = new GtkLabel("Edit Items in GtkTreeView\n". "using built-in-treeview edit - Part 2"); $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, 0, 0); $alignment->add($title); $vbox->pack_start($alignment, 0, 0); $vbox->pack_start(new GtkLabel(), 0, 0); // the 2D table $data = array( array('id0', 'item 42', 2, 3.1), array('id1', 'item 36', 20, 6.21), array('id2', 'item 21', 8, 9.36), array('id3', 'item 10', 11, 12.4), array('id4', 'item 7', 5, 15.5), array('id5', 'item 4', 17, 18.6), array('id6', 'item 3', 20, 21.73)); display_table ($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 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('Item Number', 'Description', 'Qty', 'Price'); $field_justification = array(0.5, 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]); $cell_renderer->set_property('editable', true); $cell_renderer->connect("edited", "on_edit_done", $view, $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(); $selection->connect('changed', 'on_selection'); } function format_col($column, $cell, $model, $iter, $col_num) { $path = $model->get_path($iter); $row_num = $path[0]; if ($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', $row_color); } function on_selection($selection) { list($model, $iter) = $selection->get_selected(); $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_edit_done($cell, $path, $new_text, $view, $col){ $model=$view->get_model(); $iter = $model->get_iter_from_string($path); if ($col==3) { // note 1 $new_text = str_replace('$', '', $new_text); // note 2 $new_text = str_replace(',', '', $new_text); // note 3 } $model->set($iter, $col, $new_text); } ?> |
Output
As shown above.
Explanation
This example makes use of the code in Part 1.
What's new here:
- Is this the price column?
- Yes, remove any '$'.
- Remove any ','.
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