1 /*

     2 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 *

     5 * This program is free software: you can redistribute it and/or modify

     6 * it under the terms of the GNU Lesser General Public License as published by

     7 * the Free Software Foundation, version 2.1 of the License.

     8 *

     9 * This program is distributed in the hope that it will be useful,

    10 * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12 * GNU Lesser General Public License for more details.

    13 *

    14 * You should have received a copy of the GNU Lesser General Public License

    15 * along with this program.  If not,

    16 * see "http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html/".

    17 *

    18 * Description:

    19 */

    20 

    21 #ifndef OBJECTCHARM_H_

    22 #define OBJECTCHARM_H_

    23 

    24 #include <QtGui>

    25 

    26 namespace GVA {

    27 

    28 // -------------------------------

    29 

    30 /*!

    31  * Base class for object "charms".  Charms set an event filter on a particular

    32  * object and perform some action in response to the events sent to the object.

    33  * ObjectCharms automatically destroy themselves when the target object is

    34  * destroyed.

    35  */

    36 class ObjectCharm : public QObject {

    37     Q_OBJECT

    38   public:

    39     ObjectCharm(QObject *object);

    40 

    41   private slots:

    42     virtual void onObjectDestroyed();

    43 

    44   protected:

    45     QObject *m_object;  // not owned

    46 };

    47 

    48 // -------------------------------

    49 

    50 /*!

    51  * This class draws a circle in response to mouse click events on the given object.  Intended

    52  * for testing purposes only.

    53  */

    54 class TouchCircleCharm : public ObjectCharm {

    55     Q_OBJECT

    56   public:

    57     TouchCircleCharm(QObject *object, QGraphicsItem *parent = 0);

    58     ~TouchCircleCharm();

    59 

    60   private slots:

    61     void onTimer();

    62 

    63   private:

    64     bool eventFilter(QObject *object, QEvent *event);

    65 

    66     class QGraphicsEllipseItem * m_item;

    67     class QTimer * m_timer;

    68 };

    69 

    70 }

    71 

    72 #endif /* OBJECTCHARM_H_ */