|  | Home · All Classes · Main Classes · Grouped Classes · Modules · Functions |

# echowindow.cpp Example File
tools/echoplugin/echowindow/echowindow.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2007-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License versions 2.0 or 3.0 as published by the Free Software
     ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
     ** included in the packaging of this file.  Alternatively you may (at
     ** your option) use any later version of the GNU General Public
     ** License if such license has been publicly approved by Trolltech ASA
     ** (or its successors, if any) and the KDE Free Qt Foundation. In
     ** addition, as a special exception, Trolltech gives you certain
     ** additional rights. These rights are described in the Trolltech GPL
     ** Exception version 1.2, which can be found at
     ** http://www.trolltech.com/products/qt/gplexception/ and in the file
     ** GPL_EXCEPTION.txt in this package.
     **
     ** Please review the following information to ensure GNU General
     ** Public Licensing requirements will be met:
     ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
     ** you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
     ** or contact the sales department at sales@trolltech.com.
     **
     ** In addition, as a special exception, Trolltech, as the sole
     ** copyright holder for Qt Designer, grants users of the Qt/Eclipse
     ** Integration plug-in the right for the Qt/Eclipse Integration to
     ** link to functionality provided by Qt Designer and its related
     ** libraries.
     **
     ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
     ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
     ** granted herein.
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #include <QtGui>

     #include "echowindow.h"

     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);
         }
     }

     void EchoWindow::sendEcho()
     {
         QString text = echoInterface->echo(lineEdit->text());
         label->setText(text);
     }

     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);
     }

     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;
     }