|  | 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 documentation 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.
    **
    ** 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 pluginDirectory(qApp->applicationDirPath() + "/plugin/");
         QString fileName = pluginDirectory.entryList(
             QStringList() << "libechoplugin*").first();

         QPluginLoader pluginLoader(pluginDirectory.absoluteFilePath(fileName));
         QObject *plugin = pluginLoader.instance();
         if (plugin) {
             echoInterface = qobject_cast<EchoInterface *>(plugin);
         if(echoInterface)
             return true;
         }
         return false;
     }