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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "echowindow.h"
#include <QCoreApplication>
#include <QDir>
#include <QLabel>
#include <QLayout>
#include <QLineEdit>
#include <QMessageBox>
#include <QPluginLoader>
#include <QPushButton>
//! [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, &QLineEdit::editingFinished,
this, &EchoWindow::sendEcho);
connect(button, &QPushButton::clicked,
this, &EchoWindow::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(QCoreApplication::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");
const QStringList entries = pluginsDir.entryList(QDir::Files);
for (const QString &fileName : entries) {
QPluginLoader pluginLoader(pluginsDir.absoluteFilePath(fileName));
QObject *plugin = pluginLoader.instance();
if (plugin) {
echoInterface = qobject_cast<EchoInterface *>(plugin);
if (echoInterface)
return true;
pluginLoader.unload();
}
}
return false;
}
//! [3]
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