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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the examples of the Qt Toolkit.

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    16 ** GNU Lesser General Public License Usage

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    18 ** General Public License version 2.1 as published by the Free Software

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include "informationwindow.h"

    43 #include "imageitem.h"

    44 #include "view.h"

    45 

    46 //! [0]

    47 View::View(const QString &offices, const QString &images, QWidget *parent)

    48     : QGraphicsView(parent)

    49 {

    50     officeTable = new QSqlRelationalTableModel(this);

    51     officeTable->setTable(offices);

    52     officeTable->setRelation(1, QSqlRelation(images, "locationid", "file"));

    53     officeTable->select();

    54 //! [0]

    55 

    56 //! [1]

    57     scene = new QGraphicsScene(this);

    58     scene->setSceneRect(0, 0, 465, 615);

    59     setScene(scene);

    60 

    61     addItems();

    62 

    63     QGraphicsPixmapItem *logo = scene->addPixmap(QPixmap(":/logo.png"));

    64     logo->setPos(30, 515);

    65 

    66 #ifndef Q_OS_SYMBIAN

    67     setMinimumSize(470, 620);

    68     setMaximumSize(470, 620);

    69 #else

    70     setDragMode(QGraphicsView::ScrollHandDrag);

    71 #endif

    72 

    73    setWindowTitle(tr("Offices World Wide"));

    74 }

    75 //! [1]

    76 

    77 //! [3]

    78 void View::addItems()

    79 {

    80     int officeCount = officeTable->rowCount();

    81 

    82     int imageOffset = 150;

    83     int leftMargin = 70;

    84     int topMargin = 40;

    85 

    86     for (int i = 0; i < officeCount; i++) {

    87         ImageItem *image;

    88         QGraphicsTextItem *label;

    89         QSqlRecord record = officeTable->record(i);

    90 

    91         int id = record.value("id").toInt();

    92         QString file = record.value("file").toString();

    93         QString location = record.value("location").toString();

    94 

    95         int columnOffset = ((i / 3) * 37);

    96         int x = ((i / 3) * imageOffset) + leftMargin + columnOffset;

    97         int y = ((i % 3) * imageOffset) + topMargin;

    98 

    99         image = new ImageItem(id, QPixmap(":/" + file));

   100         image->setData(0, i);

   101         image->setPos(x, y);

   102         scene->addItem(image);

   103 

   104         label = scene->addText(location);

   105         QPointF labelOffset((150 - label->boundingRect().width()) / 2, 120.0);

   106         label->setPos(QPointF(x, y) + labelOffset);

   107     }

   108 }

   109 //! [3]

   110 

   111 //! [5]

   112 void View::mouseReleaseEvent(QMouseEvent *event)

   113 {

   114     if (QGraphicsItem *item = itemAt(event->pos())) {

   115         if (ImageItem *image = qgraphicsitem_cast<ImageItem *>(item))

   116             showInformation(image);

   117     }

   118     QGraphicsView::mouseReleaseEvent(event);

   119 }

   120 //! [5]

   121 

   122 //! [6]

   123 void View::showInformation(ImageItem *image)

   124 {

   125     int id = image->id();

   126     if (id < 0 || id >= officeTable->rowCount())

   127         return;

   128 

   129     InformationWindow *window = findWindow(id);

   130     if (window && window->isVisible()) {

   131         window->raise();

   132         window->activateWindow();

   133     } else if (window && !window->isVisible()) {

   134 #ifndef Q_OS_SYMBIAN

   135         window->show();

   136 #else

   137         window->showFullScreen();

   138 #endif

   139     } else {

   140         InformationWindow *window;

   141         window = new InformationWindow(id, officeTable, this);

   142 

   143         connect(window, SIGNAL(imageChanged(int, QString)),

   144                 this, SLOT(updateImage(int, QString)));

   145 

   146 #ifndef Q_OS_SYMBIAN

   147         window->move(pos() + QPoint(20, 40));

   148         window->show();

   149 #else

   150         window->showFullScreen();

   151 #endif

   152         informationWindows.append(window);

   153     }

   154 }

   155 //! [6]

   156 

   157 //! [7]

   158 void View::updateImage(int id, const QString &fileName)

   159 {

   160     QList<QGraphicsItem *> items = scene->items();

   161 

   162     while(!items.empty()) {

   163         QGraphicsItem *item = items.takeFirst();

   164 

   165         if (ImageItem *image = qgraphicsitem_cast<ImageItem *>(item)) {

   166             if (image->id() == id){

   167                 image->setPixmap(QPixmap(":/" +fileName));

   168                 image->adjust();

   169                 break;

   170             }

   171         }

   172     }

   173 }

   174 //! [7]

   175 

   176 //! [8]

   177 InformationWindow* View::findWindow(int id)

   178 {

   179     QList<InformationWindow*>::iterator i, beginning, end;

   180 

   181     beginning = informationWindows.begin();

   182     end = informationWindows.end();

   183 

   184     for (i = beginning; i != end; ++i) {

   185         InformationWindow *window = (*i);

   186         if (window && (window->id() == id))

   187             return window;

   188     }

   189     return 0;

   190 }

   191 //! [8]

   192