added files

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

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);
+		
+	}
+}
+
+

libs/gtkmm2ext/gtkmm2ext/dndtreeview.h

@@ -0,0 +1,67 @@
+#ifndef __gtkmm2ext_dndtreeview_h__
+#define __gtkmm2ext_dndtreeview_h__
+
+#include <stdint.h>
+#include <string>
+#include <gtkmm/treeview.h>
+#include <gtkmm/treeselection.h>
+#include <gtkmm/selectiondata.h>
+
+namespace Gtkmm2ext {
+
+class DnDTreeView : public Gtk::TreeView 
+{
+
+  private:
+  public:
+	DnDTreeView ();
+	~DnDTreeView() {}
+	
+	void add_object_drag (int column, std::string type_name);
+	sigc::signal<void,std::string,uint32_t,void**> signal_object_drop;
+	
+	void on_drag_begin(const Glib::RefPtr<Gdk::DragContext>& context) {
+		TreeView::on_drag_begin (context);
+	}
+	void on_drag_end(const Glib::RefPtr<Gdk::DragContext>& context) {
+		TreeView::on_drag_end (context);
+	}
+	void on_drag_data_delete(const Glib::RefPtr<Gdk::DragContext>& context) {
+		TreeView::on_drag_data_delete (context);
+	}
+	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_motion(const Glib::RefPtr<Gdk::DragContext>& context, int x, int y, guint time) {
+		suggested_action = context->get_suggested_action();
+		return TreeView::on_drag_motion (context, x, y, time);
+	}
+	bool on_drag_drop(const Glib::RefPtr<Gdk::DragContext>& context, int x, int y, guint time) {
+		suggested_action = Gdk::DragAction (0);
+		return TreeView::on_drag_drop (context, x, y, time);
+	}
+	
+	void on_drag_data_get(const Glib::RefPtr<Gdk::DragContext>& context, Gtk::SelectionData& selection_data, guint info, guint time);
+	void on_drag_data_received(const Glib::RefPtr<Gdk::DragContext>& context, int x, int y, const Gtk::SelectionData& selection_data, guint info, guint time);
+
+  private:
+	std::list<Gtk::TargetEntry> draggable;
+	Gdk::DragAction             suggested_action;
+	int                         data_column;
+	
+	struct SerializedObjectPointers {
+	    uint32_t size;
+	    uint32_t cnt;
+	    char     type[32];
+	    void*    ptr[0];
+	};
+	
+	SerializedObjectPointers* serialize_pointers (Glib::RefPtr<Gtk::TreeModel> m, 
+						      Gtk::TreeSelection::ListHandle_Path*,
+						      Glib::ustring type);
+};
+
+} // namespace
+ 
+#endif /* __gtkmm2ext_dndtreeview_h__ */