arrow.hh 5.28 KB
Newer Older
Jan Möbius's avatar
Jan Möbius committed
1 2 3
/*===========================================================================*\
*                                                                            *
*                              OpenFlipper                                   *
Martin Schultz's avatar
Martin Schultz committed
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
 *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
 *           Department of Computer Graphics and Multimedia                  *
 *                          All rights reserved.                             *
 *                            www.openflipper.org                            *
 *                                                                           *
 *---------------------------------------------------------------------------*
 * This file is part of OpenFlipper.                                         *
 *---------------------------------------------------------------------------*
 *                                                                           *
 * 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.   *
 *                                                                           *
 * 3. Neither the name of the copyright holder 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 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.              *
Jan Möbius's avatar
Jan Möbius committed
39 40 41
*                                                                            *
\*===========================================================================*/

Jan Möbius's avatar
Jan Möbius committed
42

Jan Möbius's avatar
 
Jan Möbius committed
43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

#ifndef VSI_ARROW_HH
#define VSI_ARROW_HH

//== INCLUDES =================================================================
#include <QGraphicsWidget>
#include <QGraphicsPathItem>
#include <QString>
#include <QTimer>

//== NAMESPACES ===============================================================
namespace VSI {

//== FORWARDDECLARATIONS ======================================================
class GraphicsScene;

//== CLASS DEFINITION =========================================================

/// Scene movement widget
class Arrow : public QObject, public QGraphicsPixmapItem, public QGraphicsLayoutItem
{
  Q_OBJECT
Dirk Wilden's avatar
Dirk Wilden committed
65
  Q_INTERFACES(QGraphicsLayoutItem)
Jan Möbius's avatar
 
Jan Möbius committed
66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136

  public:

    /// Movement direction
    enum Direction
    {
      North,
      South,
      East,
      West,
      Center
    };

  public:

    /// Constructor
    Arrow (GraphicsScene *_scene, QGraphicsItem *_parent, Direction _dir);

    /// Destructor
    ~Arrow ();

    /// Activates the timer for movement (will be called if an element is moved above)
    void activate ();

    /// Stop the timer
    void reset ();

    /// Highlights the widget if the scene can be moved in this direction
    void setHighlight (bool _highlight);

    /// Sets the geometry 
    virtual void setGeometry (const QRectF &_rect);

  protected:

    // catch mouse hover events
    virtual void hoverEnterEvent (QGraphicsSceneHoverEvent *_event);
    virtual void hoverLeaveEvent (QGraphicsSceneHoverEvent *_event);

    // catch mouse press/release events
    virtual void mousePressEvent (QGraphicsSceneMouseEvent *_event);
    virtual void mouseReleaseEvent (QGraphicsSceneMouseEvent *_event);

    // catch mouse wheel events
    virtual void wheelEvent (QGraphicsSceneWheelEvent *_event);

    // size information for layouting
    virtual QSizeF sizeHint ( Qt::SizeHint _which, const QSizeF & _constraint = QSizeF()) const;

  private slots:
    void timeout ();

  private:
    GraphicsScene *scene_;

    Direction dir_;

    QTimer timer_;

    int interval_;

    bool moveSelected_;

    bool highlight_;
};

//=============================================================================
}
//=============================================================================

#endif