Sample Code 476: How to drag and drop between 2 GtkTreeViews - Part 8 - another method of passing along complex drag info - OOP ver 1? |
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Written by kksou
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Monday, 14 April 2008 |
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Problem This is the OOP version of How to drag and drop between 2 GtkTreeViews - Part 7 - another method of passing along complex drag info?.
There are two approaches to this. In this article, I presented version 1 which uses OOP at the application level as shown below. How to drag and drop between 2 GtkTreeViews - Part 9 - another method of passing along complex drag info - OOP ver 2? will show you another approach using OOP at the widget level.
Solution
Sample Code Important Note: This only works for PHP-GTK2 compliled with gtk+ v2.10 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+ v2.10. For windows, please refer to How to install php gtk2 on windows? You may also want to take a look here to see some of the new exciting PHP-GTK2 Functionalities.
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| <?php
$app = new App();
$app->main();
class App {
protected $drag_data; // note 1
public function __construct() {
global $argv;
$window = new GtkWindow();
$window->set_title($argv[0]);
$window->set_size_request(600, 240);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
$this->window = $window;
// display title
$title = new GtkLabel(" ".
"Drag and Drop between 2 TreeViews - Part 8\n".
"Another method of passing along complex drag info - OOP version 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(new GtkLabel(''), 0, 0);
$vbox->pack_start($hbox = new GtkHBox());
// Set up treeview 1
$data1 = 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', 5, 15.5),
array('row5', 'item 4', 17, 18.6),
array('row6', 'item 3', 20, 21.73));
$view1 = $this->display_table ($hbox, $data1);
// setup drag for left side
$view1->drag_source_set(Gdk::BUTTON1_MASK,
array( array( 'text/plain', 0, 0)), Gdk::ACTION_COPY|Gdk::ACTION_MOVE);
$view1->connect('drag-data-get', array($this, 'on_drag'));
// setup drop for left side
$view1->drag_dest_set(Gtk::DEST_DEFAULT_ALL,
array( array( 'text/plain', 0, 0)), Gdk::ACTION_COPY|Gdk::ACTION_MOVE);
$hbox->pack_start(new GtkLabel(' '), 0, 0);
// Set up treeview 2
$data2 = array(
array('row7', 'item 127', 105, 115.5),
array('row8', 'item 124', 117, 118.6),
array('row9', 'item 123', 120, 121.73));
$view2 = $this->display_table ($hbox, $data2);
// setup drop for right side
$view2->drag_dest_set(Gtk::DEST_DEFAULT_ALL,
array( array( 'text/plain', 0, 0)), Gdk::ACTION_COPY|Gdk::ACTION_MOVE);
$view2->connect('drag-data-received', array($this, 'on_drop'), $view1);
// setup drag for right side
$view2->drag_source_set(Gdk::BUTTON1_MASK,
array( array( 'text/plain', 0, 0)), Gdk::ACTION_COPY|Gdk::ACTION_MOVE);
$view2->connect('drag-data-get', array($this, 'on_drag'));
// this is delayed till here because we need the ID of $view2
$view1->connect('drag-data-received', array($this, 'on_drop'), $view2);
}
public function main() {
$this->window->show_all();
Gtk::main();
}
// display a 2D table in treeview
function display_table($container, $data) {
// Set up a scroll window
$scrolled_win = new GtkScrolledWindow();
$scrolled_win->set_policy( Gtk::POLICY_AUTOMATIC,
Gtk::POLICY_AUTOMATIC);
$container->pack_start($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,
array($this, '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();
$selection->connect('changed', array($this, 'on_selection'));
return $view;
}
// format treeview columns
function format_col($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) {
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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 How to drag and drop between 2 GtkTreeViews - Part 7 - another method of passing along complex drag info?
What's new here:
- Set up a protected member to store the drag info.
- Store the drag info.
- Store the name of the member in the drag information
$data.
- Retrieve the name of the member.
- Retrieve the data.
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