Problem
You have set up drag and drop of items from the treeview on the left to the treeview on the right in Part 1.
Now you would like to allow drag and drop between both treeviews (left-to-right and right-to-left) as shown below:
Solution
- First enable drag on the left treeview with drag_source_set, and drop on the right treeview with drag_dest_set.
- Then enable drag on the right treeview with drag_source_set, and drop on the left treeview with drag_dest_set.
Sample Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 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 63 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 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 156 157 158 159 160 161 162 164 166 167 168 170 171 172 173 175 176 177 178 183 185 186 187 188 189 | <?php $window = new GtkWindow(); $window->set_size_request(600, 240); $window->connect_simple('destroy', array('Gtk','main_quit')); $window->add($vbox = new GtkVBox()); // display title $title = new GtkLabel("Drag and Drop between 2 TreeViews - Part 2 (in both directions)"); $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)); $view1 = display_table ($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); // note 1 $view1->connect('drag-data-get', '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); // note 2 $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)); $view2 = display_table ($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);// note 3 $view2->connect('drag-data-received', '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); // note 4 $view2->connect('drag-data-get', 'on_drag'); // this is delayed till here because we need the ID of $view2 $view1->connect('drag-data-received', 'on_drop', $view2); $window->show_all(); Gtk::main(); // display a 2D table in treeview function display_table($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, "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'); 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) { $amt = $model->get_value($iter, 3); $cell->set_property('text', '$'.number_format($amt,2)); } $row_color = ($row_num%2==1) ? '#dddddd' : '#ffffff'; // sets the row color for odd and even rows $cell->set_property('cell-background', $row_color); // sets the background color } // the function that is called when user selects a row function on_selection($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_drag($widget, $context, $data, $info, $time) { $selection = $widget->get_selection(); list($model, $iter) = $selection->get_selected(); if ($iter==null) return; $id = $model->get_value($iter, 0); $desc = $model->get_value($iter, 1); $qty = $model->get_value($iter, 2); $price = $model->get_value($iter, 3); $data->set_text(serialize(array($id, $desc, $qty, $price))); } function on_drop($widget, $context, $x, $y, $data, $info, $time, $src_view) { // remove from src first $src_selection = $src_view->get_selection(); list($src_model, $src_iter) = $src_selection->get_selected(); if ($src_iter==null) { return; } $src_model->remove($src_iter); $data2 = unserialize($data->data); $model = $widget->get_model(); $model->append($data2); } ?> |
Output
As shown above.
Explanation
Please refer to How to drag and drop between 2 GtkTreeViews - Part 1 - left to right? for more detailed explanations on setting up drag and drop for a treeview.
- Set up drag on the left side.
- Set up drop on the left side.
- Set up drag on the right side.
- Set up drop on the right side.
Related Links
- How to drag and drop between 2 GtkTreeViews - Part 1 - left to right?
- How to drag and drop between 2 GtkTreeViews - Part 3 - left to right with insert?
- How to drag and drop between 2 GtkTreeViews - Part 4 - in both directions with insert?
- How to drag and drop between 2 GtkTreeViews - Part 5 - left to right with hints of insert location?
- How to drag and drop between 2 GtkTreeViews - Part 6 - in both directions with hints of insert location?
- How to drag and drop between 2 GtkTreeViews - Part 7 - another method of passing along complex drag info?
Read more...