text: /*********************************************************************************
   *
   * Inviwo - Interactive Visualization Workshop
   *
   * Copyright (c) 2016-2017 Inviwo Foundation
   * 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 OWNER OR CONTRIBUTORS BE LIABLE FOR
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   * (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.
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   *********************************************************************************/
  
  #ifndef IVW_WHEELEVENT_H
  #define IVW_WHEELEVENT_H
  
  #include <inviwo/core/common/inviwocoredefine.h>
  #include <inviwo/core/common/inviwo.h>
  #include <inviwo/core/interaction/events/mouseinteractionevent.h>
  #include <inviwo/core/interaction/events/mousebuttons.h>
  #include <inviwo/core/util/constexprhash.h>
  
  namespace inviwo {
  
  class IVW_CORE_API WheelEvent : public MouseInteractionEvent { 
  public:
      WheelEvent(MouseButtons buttonState = MouseButtons(flags::empty),
                 KeyModifiers modifiers = KeyModifiers(flags::empty), 
                 dvec2 delta = dvec2(0),
                 dvec2 normalizedPosition = dvec2(0),
                 uvec2 canvasSize = uvec2(0),
                 double depth = 1.0);
  
      WheelEvent(const WheelEvent& rhs) = default;
      WheelEvent& operator=(const WheelEvent& that) = default;
      virtual WheelEvent* clone() const override;
  
      virtual ~WheelEvent() = default;
  
      dvec2 delta() const;
      void setDelta(dvec2 delta);
  
      virtual uint64_t hash() const override;
      static constexpr uint64_t chash() {
          return util::constexpr_hash("org.inviwo.WheelEvent");
      }
  
  private:
      dvec2 delta_;
  };
  
  } // namespace
  
  #endif // IVW_WHEELEVENT_H
  
  