text: // ----------------------------------------------------------------------------
  // -                        Open3D: www.open3d.org                            -
  // ----------------------------------------------------------------------------
  // The MIT License (MIT)
  //
  // Copyright (c) 2021 www.open3d.org
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  // IN THE SOFTWARE.
  // ----------------------------------------------------------------------------
  
  #pragma once
  
  #include "open3d/visualization/gui/Widget.h"
  
  namespace open3d {
  namespace visualization {
  namespace gui {
  
  class Label : public Widget {
      using Super = Widget;
  
  public:
      /// Copies text
      explicit Label(const char* text = nullptr);
      ~Label();
  
      const char* GetText() const;
      /// Sets the text of the label (copies text)
      void SetText(const char* text);
  
      Color GetTextColor() const;
      void SetTextColor(const Color& color);
  
      FontId GetFontId() const;
      void SetFontId(const FontId font_id);
  
      Size CalcPreferredSize(const LayoutContext& context,
                             const Constraints& constraints) const override;
  
      DrawResult Draw(const DrawContext& context) override;
  
  private:
      struct Impl;
      std::unique_ptr<Impl> impl_;
  };
  
  }  // namespace gui
  }  // namespace visualization
  }  // namespace open3d
  