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#include <QtGui>

#include "echowindow.h"

//! [0]

EchoWindow::EchoWindow()

{

    createGUI();

    setLayout(layout);

    setWindowTitle("Echo Plugin Example");

    if (!loadPlugin()) {

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

        lineEdit->setEnabled(false);

        button->setEnabled(false);

    }

}

//! [0]

//! [1]

void EchoWindow::sendEcho()

{

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

    label->setText(text);

}

//! [1]

//! [2]

void EchoWindow::createGUI()

{

    lineEdit = new QLineEdit;

    label = new QLabel;

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

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

    connect(lineEdit, SIGNAL(editingFinished()),

            this, SLOT(sendEcho()));

    connect(button, SIGNAL(clicked()),

            this, SLOT(sendEcho()));

    layout = new QGridLayout;

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

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

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

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

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

    layout->setSizeConstraint(QLayout::SetFixedSize);

}

//! [2]

//! [3]

bool EchoWindow::loadPlugin()

{

    QDir pluginsDir(qApp->applicationDirPath());

#if defined(Q_OS_WIN)

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

        pluginsDir.cdUp();

#elif defined(Q_OS_MAC)

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

        pluginsDir.cdUp();

        pluginsDir.cdUp();

        pluginsDir.cdUp();

    }

#endif

    pluginsDir.cd("plugins");

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

        QPluginLoader pluginLoader(pluginsDir.absoluteFilePath(fileName));

        QObject *plugin = pluginLoader.instance();

        if (plugin) {

            echoInterface = qobject_cast<EchoInterface *>(plugin);

            if (echoInterface)

                return true;

        }

    }

    return false;

}

//! [3]