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 #include "ObjectCharm.h"

    22 #include "Utilities.h"

    23 

    24 #include <QtGui>

    25 #include <QDebug>

    26 #include <QApplication>

    27 #include <QTimer>

    28 

    29 

    30 namespace GVA {

    31 

    32 // ----------------------------

    33 // ObjectCharm

    34 // ----------------------------

    35 

    36 ObjectCharm::ObjectCharm(QObject *object)

    37   : m_object(object)

    38 {

    39     m_object->installEventFilter(this);

    40     connect(m_object, SIGNAL(destroyed()), this, SLOT(onObjectDestroyed()));

    41 }

    42 

    43 void ObjectCharm::onObjectDestroyed() {

    44     deleteLater();

    45 }

    46 

    47 // ----------------------------

    48 // TouchCircleCharm

    49 // ----------------------------

    50 

    51 TouchCircleCharm::TouchCircleCharm(QObject *object, QGraphicsItem *parent)

    52     : ObjectCharm(object),

    53       m_timer(new QTimer())

    54 {

    55     m_item = new QGraphicsEllipseItem(QRect(0,0,20,20), parent);

    56     m_item->hide();

    57     m_item->setPen(QPen(QColor(Qt::black)));

    58     m_item->setBrush(QBrush(QColor(200, 0, 0)));

    59     m_item->setOpacity(0.7);

    60     m_item->setZValue(100);  // make sure it isn't obscured

    61 

    62     m_timer->setSingleShot(true);

    63     connect(m_timer, SIGNAL(timeout()), this, SLOT(onTimer()));

    64 }

    65 

    66 TouchCircleCharm::~TouchCircleCharm() {

    67     delete m_item;

    68     delete m_timer;

    69 }

    70 

    71 bool TouchCircleCharm::eventFilter(QObject *object, QEvent *event) {

    72     switch (event->type()) {

    73         case QEvent::GraphicsSceneMousePress: {

    74             // Show the item.

    75             QGraphicsSceneMouseEvent * me = static_cast<QGraphicsSceneMouseEvent*>(event);

    76             m_item->setPos(me->scenePos().x() - m_item->rect().width()/2,

    77                            me->scenePos().y() - m_item->rect().height()/2);

    78 

    79             // Change the color to indicate click.

    80             m_item->setBrush(QBrush(QColor(0, 200, 0)));

    81 

    82             m_item->show();

    83             m_timer->stop();

    84             break;

    85         }

    86         case QEvent::GraphicsSceneMouseMove: {

    87             if(m_item->isVisible()) {

    88                 // Move it to new position.

    89                 QGraphicsSceneMouseEvent * me = static_cast<QGraphicsSceneMouseEvent*>(event);

    90                 m_item->setPos(me->scenePos().x() - m_item->rect().width()/2,

    91                                me->scenePos().y() - m_item->rect().height()/2);

    92 

    93                 // Change the color to indicate drag.

    94                 m_item->setBrush(QBrush(QColor(255, 255, 0)));

    95             }

    96             break;

    97         }

    98         case QEvent::GraphicsSceneMouseDoubleClick: {

    99             if(m_item->isVisible()) {

   100                 // Change the color to indicate double click.

   101                 m_item->setBrush(QBrush(QColor(0, 0, 200)));

   102 

   103                 m_timer->stop();

   104             }

   105             break;

   106         }

   107         case QEvent::GraphicsSceneMouseRelease: {

   108             if(m_item->isVisible()) {

   109                 // Change the color to indicate release.

   110                 m_item->setBrush(QBrush(QColor(200, 0, 0)));

   111 

   112                 // Start timer to hide it.

   113                 m_timer->start(2000);

   114             }

   115             break;

   116         }

   117 //        case QEvent::GraphicsSceneContextMenu: {

   118 //            if(m_item->isVisible()) {

   119 //                // Change the color to indicate context event.

   120 //                m_item->setBrush(QBrush(QColor(0, 200, 200)));

   121 //            }

   122 //            break;

   123 //        }

   124         default:

   125             break;

   126     }

   127     return object->eventFilter(object, event);

   128 }

   129 

   130 void TouchCircleCharm::onTimer() {   // slot

   131     m_item->hide();

   132 }

   133 

   134 }   // namespace GVA