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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 <QtGui>

    43 

    44 #include "echowindow.h"

    45 

    46 //! [0]

    47 EchoWindow::EchoWindow()

    48 {

    49     createGUI();

    50     setLayout(layout);

    51     setWindowTitle("Echo Plugin Example");

    52 

    53     if (!loadPlugin()) {

    54         QMessageBox::information(this, "Error", "Could not load the plugin");

    55         lineEdit->setEnabled(false);

    56         button->setEnabled(false);

    57     }

    58 }

    59 //! [0]

    60 

    61 //! [1]

    62 void EchoWindow::sendEcho()

    63 {

    64     QString text = echoInterface->echo(lineEdit->text());

    65     label->setText(text);

    66 }

    67 //! [1]

    68 

    69 //! [2]

    70 void EchoWindow::createGUI()

    71 {

    72     lineEdit = new QLineEdit;

    73     label = new QLabel;

    74     label->setFrameStyle(QFrame::Box | QFrame::Plain);

    75     button = new QPushButton(tr("Send Message"));

    76 

    77     connect(lineEdit, SIGNAL(editingFinished()),

    78             this, SLOT(sendEcho()));

    79     connect(button, SIGNAL(clicked()),

    80             this, SLOT(sendEcho()));

    81 

    82     layout = new QGridLayout;

    83     layout->addWidget(new QLabel(tr("Message:")), 0, 0);

    84     layout->addWidget(lineEdit, 0, 1);

    85     layout->addWidget(new QLabel(tr("Answer:")), 1, 0);

    86     layout->addWidget(label, 1, 1);

    87     layout->addWidget(button, 2, 1, Qt::AlignRight);

    88     layout->setSizeConstraint(QLayout::SetFixedSize);

    89 }

    90 //! [2]

    91 

    92 //! [3]

    93 bool EchoWindow::loadPlugin()

    94 {

    95     QDir pluginsDir(qApp->applicationDirPath());

    96 #if defined(Q_OS_WIN)

    97     if (pluginsDir.dirName().toLower() == "debug" || pluginsDir.dirName().toLower() == "release")

    98         pluginsDir.cdUp();

    99 #elif defined(Q_OS_MAC)

   100     if (pluginsDir.dirName() == "MacOS") {

   101         pluginsDir.cdUp();

   102         pluginsDir.cdUp();

   103         pluginsDir.cdUp();

   104     }

   105 #endif

   106     pluginsDir.cd("plugins");

   107     foreach (QString fileName, pluginsDir.entryList(QDir::Files)) {

   108         QPluginLoader pluginLoader(pluginsDir.absoluteFilePath(fileName));

   109         QObject *plugin = pluginLoader.instance();

   110         if (plugin) {

   111             echoInterface = qobject_cast<EchoInterface *>(plugin);

   112             if (echoInterface)

   113                 return true;

   114         }

   115     }

   116 

   117     return false;

   118 }

   119 //! [3]