tree_element.hh

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/*
 * 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; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
 
#pragma once
 
#include "tree_element.h"
 
namespace blender::ed::outliner {
 
/* -------------------------------------------------------------------- */
/* Tree-Display Interface */
 
class AbstractTreeElement {
 protected:
  TreeElement &legacy_te_;
 
 public:
  virtual ~AbstractTreeElement() = default;
 
  virtual bool expandPoll(const SpaceOutliner &) const
  {
    return true;
  }
  virtual void expand(SpaceOutliner &) const
  {
  }
  virtual void postExpand(SpaceOutliner &) const
  {
  }
 
  virtual bool isExpandValid() const
  {
    return true;
  }
 
 protected:
  /* Pseudo-abstract: Only allow creation through derived types. */
  AbstractTreeElement(TreeElement &legacy_te) : legacy_te_(legacy_te)
  {
  }
};
 
}  // namespace blender::ed::outliner