76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/** \file
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* \ingroup spoutliner
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*/
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#pragma once
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#include "tree_element.h"
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namespace blender::ed::outliner {
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/* -------------------------------------------------------------------- */
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/* Tree-Display Interface */
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class AbstractTreeElement {
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protected:
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/**
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* Reference back to the owning legacy TreeElement.
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* Most concrete types need access to this, so storing here. Eventually the type should be
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* replaced by AbstractTreeElement and derived types.
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*/
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TreeElement &legacy_te_;
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public:
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virtual ~AbstractTreeElement() = default;
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/**
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* Check if the type is expandable in current context.
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*/
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virtual bool expandPoll(const SpaceOutliner &) const
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{
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return true;
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}
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/**
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* Let the type add its own children.
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*/
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virtual void expand(SpaceOutliner &) const
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{
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}
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virtual void postExpand(SpaceOutliner &) const
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{
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}
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/**
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* Just while transitioning to the new tree-element design: Some types are only partially ported,
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* and the expanding isn't done yet.
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*/
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virtual bool isExpandValid() const
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{
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return true;
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}
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protected:
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/* Pseudo-abstract: Only allow creation through derived types. */
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AbstractTreeElement(TreeElement &legacy_te) : legacy_te_(legacy_te)
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{
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}
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};
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} // namespace blender::ed::outliner
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