mirror of
https://github.com/crystalidea/qt6windows7.git
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91 lines
2.3 KiB
C++
91 lines
2.3 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include "echowindow.h"
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#include <QCoreApplication>
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#include <QDir>
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#include <QLabel>
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#include <QLayout>
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#include <QLineEdit>
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#include <QMessageBox>
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#include <QPluginLoader>
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#include <QPushButton>
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//! [0]
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EchoWindow::EchoWindow()
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{
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createGUI();
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setLayout(layout);
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setWindowTitle("Echo Plugin Example");
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if (!loadPlugin()) {
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QMessageBox::information(this, "Error", "Could not load the plugin");
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lineEdit->setEnabled(false);
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button->setEnabled(false);
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}
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}
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//! [0]
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//! [1]
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void EchoWindow::sendEcho()
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{
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QString text = echoInterface->echo(lineEdit->text());
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label->setText(text);
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}
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//! [1]
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//! [2]
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void EchoWindow::createGUI()
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{
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lineEdit = new QLineEdit;
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label = new QLabel;
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label->setFrameStyle(QFrame::Box | QFrame::Plain);
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button = new QPushButton(tr("Send Message"));
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connect(lineEdit, &QLineEdit::editingFinished,
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this, &EchoWindow::sendEcho);
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connect(button, &QPushButton::clicked,
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this, &EchoWindow::sendEcho);
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layout = new QGridLayout;
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layout->addWidget(new QLabel(tr("Message:")), 0, 0);
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layout->addWidget(lineEdit, 0, 1);
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layout->addWidget(new QLabel(tr("Answer:")), 1, 0);
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layout->addWidget(label, 1, 1);
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layout->addWidget(button, 2, 1, Qt::AlignRight);
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layout->setSizeConstraint(QLayout::SetFixedSize);
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}
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//! [2]
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//! [3]
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bool EchoWindow::loadPlugin()
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{
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QDir pluginsDir(QCoreApplication::applicationDirPath());
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#if defined(Q_OS_WIN)
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if (pluginsDir.dirName().toLower() == "debug" || pluginsDir.dirName().toLower() == "release")
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pluginsDir.cdUp();
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#elif defined(Q_OS_MAC)
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if (pluginsDir.dirName() == "MacOS") {
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pluginsDir.cdUp();
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pluginsDir.cdUp();
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pluginsDir.cdUp();
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}
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#endif
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pluginsDir.cd("plugins");
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const QStringList entries = pluginsDir.entryList(QDir::Files);
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for (const QString &fileName : entries) {
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QPluginLoader pluginLoader(pluginsDir.absoluteFilePath(fileName));
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QObject *plugin = pluginLoader.instance();
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if (plugin) {
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echoInterface = qobject_cast<EchoInterface *>(plugin);
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if (echoInterface)
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return true;
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pluginLoader.unload();
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}
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}
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return false;
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}
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//! [3]
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