added files

git-svn-id: svn://localhost/trunk/ardour2@67 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 103 insertions, 0 deletions

diff --git a/libs/gtkmm2ext/dndtreeview.cc b/libs/gtkmm2ext/dndtreeview.cc
new file mode 100644
index 0000000000..f230fc42b2
--- /dev/null
+++ b/libs/gtkmm2ext/dndtreeview.cc
@@ -0,0 +1,103 @@
+#include <cstdio>
+
+#include <gtkmm2ext/dndtreeview.h>
+
+using namespace std;
+using namespace sigc;
+using namespace Gdk;
+using namespace Gtk;
+using namespace Glib;
+using namespace Gtkmm2ext;
+
+DnDTreeView::DnDTreeView ()
+	: TreeView ()
+{
+	draggable.push_back (TargetEntry ("GTK_TREE_MODEL_ROW", TARGET_SAME_WIDGET));
+	
+	enable_model_drag_source (draggable);
+	enable_model_drag_dest (draggable);
+	
+	suggested_action = Gdk::DragAction (0);
+}
+
+void
+DnDTreeView::add_object_drag (int column, string type_name)
+{
+	draggable.push_back (TargetEntry (type_name, TargetFlags(0)));
+	data_column = column;
+
+	enable_model_drag_source (draggable);
+	enable_model_drag_dest (draggable);
+}
+
+DnDTreeView::SerializedObjectPointers* 
+DnDTreeView::serialize_pointers (RefPtr<TreeModel> model, TreeSelection::ListHandle_Path* selection, ustring type)
+{
+	uint32_t cnt = selection->size();
+	uint32_t sz = (sizeof (void*) * cnt) + sizeof (SerializedObjectPointers);
+
+	char* buf = new char[sz];
+	SerializedObjectPointers* sr = new (buf) SerializedObjectPointers;
+	
+	sr->cnt = cnt;
+	sr->size = sz;
+
+	snprintf (sr->type, sizeof (sr->type), "%s", type.c_str());
+
+	cnt = 0;
+
+	for (TreeSelection::ListHandle_Path::iterator x = selection->begin(); x != selection->end(); ++x, ++cnt) {
+		TreeModel::Row row = *(model->get_iter (*x));
+		row.get_value (data_column, sr->ptr[cnt]);
+	}
+	
+	return sr;
+}
+
+void
+DnDTreeView::on_drag_data_get(const RefPtr<DragContext>& context, SelectionData& selection_data, guint info, guint time)
+{
+	if (selection_data.get_target() == "GTK_TREE_MODEL_ROW") {
+		
+		TreeView::on_drag_data_get (context, selection_data, info, time);
+		
+	} else {
+		
+		Gtk::TreeSelection::ListHandle_Path selection = get_selection()->get_selected_rows ();
+		SerializedObjectPointers* sr = serialize_pointers (get_model(), &selection, selection_data.get_target());
+		selection_data.set (8, (guchar*)sr, sr->size);
+		
+	}
+}
+
+void 
+DnDTreeView::on_drag_data_received(const RefPtr<DragContext>& context, int x, int y, const SelectionData& selection_data, guint info, guint time)
+{
+	if (suggested_action) {
+		/* this is a drag motion callback. just update the status to
+		   say that we are still dragging, and that's it.
+		*/
+		suggested_action = Gdk::DragAction (0);
+		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 {
+		/* object D-n-D */
+		
+		const SerializedObjectPointers* sr = reinterpret_cast<const SerializedObjectPointers *>(selection_data.get_data());
+		
+		if (sr) {
+			signal_object_drop (sr->type, sr->cnt, const_cast<void**>(sr->ptr));
+		}
+		
+		context->drag_finish (true, false, time);
+		
+	}
+}
+
+