/*
- Copyright (C) 2000-2007 Paul Davis
+ Copyright (C) 2000-2007 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
DataType data[0];
};
-class LIBGTKMM2EXT_API DnDTreeViewBase : public Gtk::TreeView
+class LIBGTKMM2EXT_API DnDTreeViewBase : public Gtk::TreeView
{
private:
public:
void add_drop_targets (std::list<Gtk::TargetEntry>&);
void add_object_drag (int column, std::string type_name);
- void on_drag_begin (Glib::RefPtr<Gdk::DragContext> const & context) {
- Gtk::TreeView::on_drag_begin (context);
- start_object_drag ();
+ void on_drag_begin (Glib::RefPtr<Gdk::DragContext> const & context);
+ void on_drag_end (Glib::RefPtr<Gdk::DragContext> const & context);
+
+ bool on_button_press_event (GdkEventButton *ev) {
+ press_start_x = ev->x;
+ press_start_y = ev->y;
+ return TreeView::on_button_press_event (ev);
}
-
+
void on_drag_leave(const Glib::RefPtr<Gdk::DragContext>& context, guint time) {
suggested_action = context->get_suggested_action();
TreeView::on_drag_leave (context, time);
bool on_drag_drop(const Glib::RefPtr<Gdk::DragContext>& context, int x, int y, guint time);
+ void set_drag_column (int c) {
+ _drag_column = c;
+ }
+
protected:
std::list<Gtk::TargetEntry> draggable;
Gdk::DragAction suggested_action;
int data_column;
std::string object_type;
+ double press_start_x;
+ double press_start_y;
+ int _drag_column;
+
struct DragData {
DragData () : source (0) {}
-
+
Gtk::TreeView* source;
int data_column;
std::string object_type;
};
-
+
static DragData drag_data;
void start_object_drag () {
drag_data.data_column = data_column;
drag_data.object_type = object_type;
}
+
+ void end_object_drag () {
+ drag_data.source = 0;
+ drag_data.data_column = -1;
+ drag_data.object_type = "";
+ }
};
template<class DataType>
class /*LIBGTKMM2EXT_API*/ DnDTreeView : public DnDTreeViewBase
{
public:
- DnDTreeView() {}
+ DnDTreeView() {}
~DnDTreeView() {}
- sigc::signal<void,const std::list<DataType>&,Gtk::TreeView*,int,int,Glib::RefPtr<Gdk::DragContext>&> signal_drop;
+ sigc::signal<void, const Glib::RefPtr<Gdk::DragContext>&, const Gtk::SelectionData&> signal_drop;
void on_drag_data_get(const Glib::RefPtr<Gdk::DragContext>& context, Gtk::SelectionData& selection_data, guint info, guint time) {
if (selection_data.get_target() == "GTK_TREE_MODEL_ROW") {
} else if (selection_data.get_target() == object_type) {
- /* we don't care about the data passed around by DnD, but
- we have to provide something otherwise it will stop.
+ /* return a pointer to this object, which allows
+ * the receiver to call on_drag_data_received()
*/
-
- guchar c;
- selection_data.set (8, (guchar*)&c, 1);
+ void *c = this;
+ selection_data.set (8, (guchar*)&c, sizeof(void*));
}
}
-
+
void on_drag_data_received(const Glib::RefPtr<Gdk::DragContext>& context, int x, int y, const Gtk::SelectionData& selection_data, guint info, guint time) {
if (suggested_action) {
/* this is a drag motion callback. just update the status to
TreeView::on_drag_data_received (context, x, y, selection_data, info, time);
return;
}
-
+
if (selection_data.get_target() == "GTK_TREE_MODEL_ROW") {
-
TreeView::on_drag_data_received (context, x, y, selection_data, info, time);
-
-
- } else if (selection_data.get_target() == object_type) {
-
- end_object_drag (const_cast<Glib::RefPtr<Gdk::DragContext>& > (context), x, y);
-
} else {
- /* some kind of target type added by the app, which will be handled by a signal handler */
+ /* some kind of target type, usually 'object_type' added by the app,
+ * which will be handled by a signal handler */
+ for (std::list<Gtk::TargetEntry>::const_iterator i = draggable.begin(); i != draggable.end (); ++i) {
+ if (selection_data.get_target() == (*i).get_target()) {
+ signal_drop (context, selection_data);
+ context->drag_finish (true, false, time);
+ break;
+ }
+ }
}
}
* object that wants to get the list of dragged items.
*/
- void get_object_drag_data (std::list<DataType>& l, Gtk::TreeView** source) {
+ void get_object_drag_data (std::list<DataType>& l, Gtk::TreeView** source) const {
if (drag_data.source == 0) {
return;
}
-
+
Glib::RefPtr<Gtk::TreeModel> model = drag_data.source->get_model();
DataType v;
Gtk::TreeSelection::ListHandle_Path selection = drag_data.source->get_selection()->get_selected_rows ();
-
+
for (Gtk::TreeSelection::ListHandle_Path::iterator x = selection.begin(); x != selection.end(); ++x) {
model->get_iter (*x)->get_value (drag_data.data_column, v);
l.push_back (v);
}
-
- *source = drag_data.source;
- }
- private:
- void end_object_drag (Glib::RefPtr<Gdk::DragContext>& context, int x, int y) {
- std::list<DataType> l;
- Gtk::TreeView* source;
- get_object_drag_data (l, &source);
- signal_drop (l, source, x, y, context);
+ *source = drag_data.source;
}
-
};
} // namespace
-
+
#endif /* __gtkmm2ext_dndtreeview_h__ */
projects / ardour.git / blobdiff