[aptitude @ Import the Subversion repository into darcs.]

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diff --git a/src/pkg_item_with_subtree.h b/src/pkg_item_with_subtree.h
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+// pkg_item_with_subtree.h   (this is -*-c++-*-)
+//
+//  Copyright 1999-2002, 2005 Daniel Burrows
+//
+//  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
+//  the Free Software Foundation; either version 2 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; see the file COPYING.  If not, write to
+//  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+//  Boston, MA 02111-1307, USA.
+//
+//  A package item with an associated subtree.  More useful than you might
+// think ;-)
+
+#ifndef PKG_ITEM_WITH_SUBTREE_H
+#define PKG_ITEM_WITH_SUBTREE_H
+
+#include "pkg_item.h"
+#include "pkg_columnizer.h"
+
+#include <vscreen/columnify.h>
+#include <vscreen/config/column_definition.h>
+#include <vscreen/transcode.h>
+#include <vscreen/vs_subtree.h>
+
+template<class child, class sorter=tag_sort_policy>
+class pkg_item_with_subtree:public vs_subtree<child, sorter>, public pkg_item
+{
+  class pkg_with_subtree_columnizer:public pkg_columnizer
+  {
+    bool expanded, hierarchical;
+  protected:
+    column_disposition setup_column(int type)
+      {
+	if(type==name)
+	  {
+	    std::wstring name=transcode(get_pkg().Name());
+
+	    // Interesting question: would it be reasonable to use graphical
+	    // characters here?  What about Unicode graphical characters?
+	    if(hierarchical)
+	      return column_disposition(std::wstring(expanded?L"--\\ ":L"--- ")+name, get_basex());
+	    else
+	      {
+		return column_disposition(L"-> "+name, get_basex());
+	      }
+	  }
+	else
+	  return pkg_columnizer::setup_column(type);
+      }
+
+  public:
+    pkg_with_subtree_columnizer(bool _expanded, bool _hierarchical,
+				const pkgCache::PkgIterator &_pkg,
+				const pkgCache::VerIterator &_visible_ver,
+				const column_definition_list &_columns, int _basex)
+      :pkg_columnizer(_pkg, _visible_ver, _columns, _basex),
+       expanded(_expanded), hierarchical(_hierarchical)
+    {}
+  };
+
+public:
+  pkg_item_with_subtree<child,sorter>(const pkgCache::PkgIterator &_package,
+				      sigc::signal2<void, const pkgCache::PkgIterator &, const pkgCache::VerIterator &> *_sig,
+				      bool _expanded=false):vs_subtree<child, sorter>(_expanded), pkg_item(_package, _sig) {}
+
+  virtual void paint(vs_tree *win, int y, bool hierarchical,
+		     const style &st)
+  {
+    int basex=2*get_depth();
+    int width, height;
+
+    win->getmaxyx(height, width);
+    pkg_columnizer::setup_columns();
+
+    empty_column_parameters p;
+
+    std::wstring disp=pkg_with_subtree_columnizer(vs_subtree<child, sorter>::get_expanded(),
+						  hierarchical,
+						  get_package(),
+						  visible_version(),
+						  pkg_columnizer::get_columns(),
+						  basex).layout_columns(width, p);
+    win->mvaddnstr(y, 0, disp, width);
+  }
+
+  bool dispatch_key(const key &k, vs_tree *owner)
+  {
+    if(vs_subtree<child, sorter>::dispatch_key(k, owner))
+      return true;
+    else
+      return pkg_item::dispatch_key(k, owner);
+  }
+
+  void dispatch_mouse(short id, int x, mmask_t bstate, vs_tree *owner)
+  {
+    pkg_item::dispatch_mouse(id, x, bstate, owner);
+  }
+};
+
+typedef pkg_item_with_subtree<vs_treeitem> pkg_item_with_generic_subtree;
+typedef pkg_item_with_subtree<pkg_tree_node> pkg_item_with_pkgnode_subtree;
+
+#endif