Line data    Source code

       1              : /*
       2              :  * SPDX-License-Identifier: GPL-3.0-only
       3              :  * MuseScore-Studio-CLA-applies
       4              :  *
       5              :  * MuseScore Studio
       6              :  * Music Composition & Notation
       7              :  *
       8              :  * Copyright (C) 2021 MuseScore Limited and others
       9              :  *
      10              :  * This program is free software: you can redistribute it and/or modify
      11              :  * it under the terms of the GNU General Public License version 3 as
      12              :  * published by the Free Software Foundation.
      13              :  *
      14              :  * This program is distributed in the hope that it will be useful,
      15              :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      16              :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      17              :  * GNU General Public License for more details.
      18              :  *
      19              :  * You should have received a copy of the GNU General Public License
      20              :  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
      21              :  */
      22              : 
      23              : #pragma once
      24              : 
      25              : #include "global/allocator.h"
      26              : #include "draw/types/geometry.h"
      27              : 
      28              : namespace mu::engraving {
      29              : class EngravingItem;
      30              : class EditData;
      31              : 
      32              : //-------------------------------------------------------------------
      33              : //   ElementGroup
      34              : ///   Base class for implementing logic to handle groups of elements
      35              : ///   together in certain operations.
      36              : //-------------------------------------------------------------------
      37              : 
      38              : class ElementGroup
      39              : {
      40            0 :     OBJECT_ALLOCATOR(engraving, ElementGroup)
      41              : public:
      42            0 :     virtual ~ElementGroup() {}
      43              : 
      44              :     virtual void startDrag(EditData&) = 0;
      45              :     virtual muse::RectF drag(EditData&) = 0;
      46              :     virtual void endDrag(EditData&) = 0;
      47              : 
      48            0 :     virtual bool enabled() const { return true; }
      49              : };
      50              : 
      51              : //-------------------------------------------------------------------
      52              : //   DisabledElementGroup
      53              : //-------------------------------------------------------------------
      54              : 
      55              : class DisabledElementGroup final : public ElementGroup
      56              : {
      57            0 :     OBJECT_ALLOCATOR(engraving, DisabledElementGroup)
      58              : public:
      59            0 :     bool enabled() const override { return false; }
      60              : 
      61            0 :     void startDrag(EditData&) override {}
      62            0 :     muse::RectF drag(EditData&) override { return muse::RectF(); }
      63            0 :     void endDrag(EditData&) override {}
      64              : };
      65              : 
      66              : //-------------------------------------------------------------------
      67              : //   SingleElementGroup
      68              : ///   EngravingItem group for single element.
      69              : //-------------------------------------------------------------------
      70              : 
      71              : class SingleElementGroup final : public ElementGroup
      72              : {
      73            0 :     OBJECT_ALLOCATOR(engraving, SingleElementGroup)
      74              : 
      75              : public:
      76            0 :     SingleElementGroup(EngravingItem* el)
      77            0 :         : m_e(el) {}
      78              : 
      79              :     void startDrag(EditData& ed) override;
      80              :     muse::RectF drag(EditData& ed) override;
      81              :     void endDrag(EditData& ed) override;
      82              : 
      83              : private:
      84              :     EngravingItem* m_e = nullptr;
      85              : };
      86              : }