viewport_mouse_event.h

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/*
 * Copyright (c) 2008, Willow Garage, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of the Willow Garage, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * 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 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 */

#ifndef VIEWPORT_MOUSE_EVENT_H
#define VIEWPORT_MOUSE_EVENT_H

#include <QMouseEvent>
#include <QWheelEvent>

namespace Ogre
{
class Viewport;
}

namespace rviz
{

class RenderPanel;

struct ViewportMouseEvent
{
  ViewportMouseEvent() {}

  ViewportMouseEvent(RenderPanel* p, Ogre::Viewport* vp, QMouseEvent* e, int lx, int ly)
  : panel( p )
  , viewport( vp )
  , type( e->type() )
  , x( e->x() )
  , y( e->y() )
  , wheel_delta( 0 )
  , acting_button( e->button() )
  , buttons_down( e->buttons() )
  , modifiers( e->modifiers() )
  , last_x( lx )
  , last_y( ly )
  {
  }

  // Qt has a separate QWheelEvent for mousewheel events which is not
  // a subclass of QMouseEvent, but has a lot of overlap with it.

  ViewportMouseEvent(RenderPanel* p, Ogre::Viewport* vp, QWheelEvent* e, int lx, int ly)
  : panel( p )
  , viewport( vp )
  , type( e->type() )
  , x( e->x() )
  , y( e->y() )
  , wheel_delta( e->delta() )
  , acting_button( Qt::NoButton )
  , buttons_down( e->buttons() )
  , modifiers( e->modifiers() )
  , last_x( lx )
  , last_y( ly )
  {
  }

  // Convenience functions for getting the state of the buttons and
  // modifiers at the time of the event.  For the button which caused
  // a press or release event, use acting_button.
  bool left() { return buttons_down & Qt::LeftButton; }
  bool middle() { return buttons_down & Qt::MidButton; }
  bool right() { return buttons_down & Qt::RightButton; }

  bool shift() { return modifiers & Qt::ShiftModifier; }
  bool control() { return modifiers & Qt::ControlModifier; }
  bool alt() { return modifiers & Qt::AltModifier; }

  // Convenience functions to tell if the event is a mouse-down or
  // mouse-up event and which button caused it.
  bool leftUp() { return type == QEvent::MouseButtonRelease && acting_button == Qt::LeftButton; }
  bool middleUp() { return type == QEvent::MouseButtonRelease && acting_button == Qt::MidButton; }
  bool rightUp() { return type == QEvent::MouseButtonRelease && acting_button == Qt::RightButton; }

  bool leftDown() { return type == QEvent::MouseButtonPress && acting_button == Qt::LeftButton; }
  bool middleDown() { return type == QEvent::MouseButtonPress && acting_button == Qt::MidButton; }
  bool rightDown() { return type == QEvent::MouseButtonPress && acting_button == Qt::RightButton; }

  RenderPanel* panel;
  Ogre::Viewport* viewport;
  QEvent::Type type;
  int x;
  int y;
  int wheel_delta;
  Qt::MouseButton acting_button; // The button which caused the event.  Can be Qt::NoButton (move or wheel events).
  Qt::MouseButtons buttons_down;
  Qt::KeyboardModifiers modifiers;
  int last_x;
  int last_y;
};

} // namespace rviz

#endif // VIEWPORT_MOUSE_EVENT_H