4 #include <gtkmm2ext/dndtreeview.h>
11 using namespace Gtkmm2ext;
13 DnDTreeView::DnDTreeView ()
16 draggable.push_back (TargetEntry ("GTK_TREE_MODEL_ROW", TARGET_SAME_WIDGET));
19 enable_model_drag_source (draggable);
20 enable_model_drag_dest (draggable);
22 suggested_action = Gdk::DragAction (0);
26 DnDTreeView::add_drop_targets (list<TargetEntry>& targets)
28 for (list<TargetEntry>::iterator i = targets.begin(); i != targets.end(); ++i) {
29 draggable.push_back (*i);
31 enable_model_drag_source (draggable);
32 enable_model_drag_dest (draggable);
36 DnDTreeView::add_object_drag (int column, string type_name)
38 draggable.push_back (TargetEntry (type_name, TargetFlags(0)));
41 enable_model_drag_source (draggable);
42 enable_model_drag_dest (draggable);
45 DnDTreeView::SerializedObjectPointers*
46 DnDTreeView::serialize_pointers (RefPtr<TreeModel> model, TreeSelection::ListHandle_Path* selection, ustring type)
48 uint32_t cnt = selection->size();
49 uint32_t sz = (sizeof (void*) * cnt) + sizeof (SerializedObjectPointers);
51 cerr << "lets plan to serialize " << cnt << " from selection\n";
53 char* buf = new char[sz];
54 SerializedObjectPointers* sr = new (buf) SerializedObjectPointers;
59 snprintf (sr->type, sizeof (sr->type), "%s", type.c_str());
63 for (TreeSelection::ListHandle_Path::iterator x = selection->begin(); x != selection->end(); ++x, ++cnt) {
64 cerr << "getting next item\n";
65 TreeModel::Row row = *(model->get_iter (*x));
66 row.get_value (data_column, sr->ptr[cnt]);
69 cerr << "returning an SR with size = " << sr->size << endl;
74 DnDTreeView::on_drag_data_get(const RefPtr<DragContext>& context, SelectionData& selection_data, guint info, guint time)
76 if (selection_data.get_target() == "GTK_TREE_MODEL_ROW") {
78 TreeView::on_drag_data_get (context, selection_data, info, time);
80 } else if (data_column >= 0) {
82 Gtk::TreeSelection::ListHandle_Path selection = get_selection()->get_selected_rows ();
83 SerializedObjectPointers* sr = serialize_pointers (get_model(), &selection, selection_data.get_target());
84 selection_data.set (8, (guchar*)sr, sr->size);
86 cerr << "selection data set to contain " << sr->size << endl;
91 DnDTreeView::on_drag_data_received(const RefPtr<DragContext>& context, int x, int y, const SelectionData& selection_data, guint info, guint time)
93 if (suggested_action) {
94 /* this is a drag motion callback. just update the status to
95 say that we are still dragging, and that's it.
97 suggested_action = Gdk::DragAction (0);
98 TreeView::on_drag_data_received (context, x, y, selection_data, info, time);
102 if (selection_data.get_target() == "GTK_TREE_MODEL_ROW") {
104 TreeView::on_drag_data_received (context, x, y, selection_data, info, time);
106 } else if (data_column >= 0) {
110 const SerializedObjectPointers* sr = reinterpret_cast<const SerializedObjectPointers *>(selection_data.get_data());
113 signal_object_drop (sr->type, sr->cnt, const_cast<void**>(sr->ptr));
117 /* some kind of target type added by the app, which will be handled by a signal handler */
122 DnDTreeView::on_drag_drop(const Glib::RefPtr<Gdk::DragContext>& context, int x, int y, guint time)
124 suggested_action = Gdk::DragAction (0);
125 return TreeView::on_drag_drop (context, x, y, time);