text: /*
   * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #pragma once
  
  #include "Tool.h"
  #include <LibGfx/Point.h>
  #include <LibGUI/ActionGroup.h>
  
  class LineTool final : public Tool {
  public:
      LineTool();
      virtual ~LineTool() override;
  
      virtual void on_mousedown(GUI::MouseEvent&) override;
      virtual void on_mousemove(GUI::MouseEvent&) override;
      virtual void on_mouseup(GUI::MouseEvent&) override;
      virtual void on_contextmenu(GUI::ContextMenuEvent&) override;
      virtual void on_second_paint(GUI::PaintEvent&) override;
      virtual void on_keydown(GUI::KeyEvent&) override;
      virtual void on_keyup(GUI::KeyEvent&) override;
  
  private:
      virtual const char* class_name() const override { return "LineTool"; }
  
      GUI::MouseButton m_drawing_button { GUI::MouseButton::None };
      Gfx::Point m_line_start_position;
      Gfx::Point m_line_end_position;
      RefPtr<GUI::Menu> m_context_menu;
      GUI::ActionGroup m_thickness_actions;
      int m_thickness { 1 };
      bool m_constrain_angle { false };
  };
  