1 | /****************************************************************************
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2 | **
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3 | ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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4 | ** Contact: Qt Software Information ([email protected])
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5 | **
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6 | ** This file is part of the examples of the Qt Toolkit.
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7 | **
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8 | ** $QT_BEGIN_LICENSE:LGPL$
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9 | ** Commercial Usage
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10 | ** Licensees holding valid Qt Commercial licenses may use this file in
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11 | ** accordance with the Qt Commercial License Agreement provided with the
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12 | ** Software or, alternatively, in accordance with the terms contained in
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13 | ** a written agreement between you and Nokia.
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14 | **
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15 | ** GNU Lesser General Public License Usage
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16 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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17 | ** General Public License version 2.1 as published by the Free Software
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18 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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19 | ** packaging of this file. Please review the following information to
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20 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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21 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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22 | **
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23 | ** In addition, as a special exception, Nokia gives you certain
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24 | ** additional rights. These rights are described in the Nokia Qt LGPL
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25 | ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
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26 | ** package.
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27 | **
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28 | ** GNU General Public License Usage
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29 | ** Alternatively, this file may be used under the terms of the GNU
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30 | ** General Public License version 3.0 as published by the Free Software
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31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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32 | ** packaging of this file. Please review the following information to
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33 | ** ensure the GNU General Public License version 3.0 requirements will be
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34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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35 | **
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36 | ** If you are unsure which license is appropriate for your use, please
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37 | ** contact the sales department at [email protected].
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38 | ** $QT_END_LICENSE$
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39 | **
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40 | ****************************************************************************/
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41 |
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42 | #include <QtGui>
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43 |
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44 | #include "echowindow.h"
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45 |
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46 | //! [0]
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47 | EchoWindow::EchoWindow()
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48 | {
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49 | createGUI();
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50 | setLayout(layout);
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51 | setWindowTitle("Echo Plugin Example");
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52 |
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53 | if (!loadPlugin()) {
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54 | QMessageBox::information(this, "Error", "Could not load the plugin");
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55 | lineEdit->setEnabled(false);
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56 | button->setEnabled(false);
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57 | }
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58 | }
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59 | //! [0]
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60 |
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61 | //! [1]
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62 | void EchoWindow::sendEcho()
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63 | {
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64 | QString text = echoInterface->echo(lineEdit->text());
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65 | label->setText(text);
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66 | }
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67 | //! [1]
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68 |
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69 | //! [2]
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70 | void EchoWindow::createGUI()
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71 | {
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72 | lineEdit = new QLineEdit;
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73 | label = new QLabel;
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74 | label->setFrameStyle(QFrame::Box | QFrame::Plain);
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75 | button = new QPushButton(tr("Send Message"));
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76 |
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77 | connect(lineEdit, SIGNAL(editingFinished()),
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78 | this, SLOT(sendEcho()));
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79 | connect(button, SIGNAL(clicked()),
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80 | this, SLOT(sendEcho()));
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81 |
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82 | layout = new QGridLayout;
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83 | layout->addWidget(new QLabel(tr("Message:")), 0, 0);
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84 | layout->addWidget(lineEdit, 0, 1);
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85 | layout->addWidget(new QLabel(tr("Answer:")), 1, 0);
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86 | layout->addWidget(label, 1, 1);
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87 | layout->addWidget(button, 2, 1, Qt::AlignRight);
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88 | layout->setSizeConstraint(QLayout::SetFixedSize);
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89 | }
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90 | //! [2]
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91 |
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92 | //! [3]
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93 | bool EchoWindow::loadPlugin()
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94 | {
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95 | QDir pluginsDir(qApp->applicationDirPath());
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96 | #if defined(Q_OS_WIN)
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97 | if (pluginsDir.dirName().toLower() == "debug" || pluginsDir.dirName().toLower() == "release")
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98 | pluginsDir.cdUp();
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99 | #elif defined(Q_OS_MAC)
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100 | if (pluginsDir.dirName() == "MacOS") {
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101 | pluginsDir.cdUp();
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102 | pluginsDir.cdUp();
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103 | pluginsDir.cdUp();
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104 | }
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105 | #endif
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106 | pluginsDir.cd("plugins");
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107 | foreach (QString fileName, pluginsDir.entryList(QDir::Files)) {
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108 | QPluginLoader pluginLoader(pluginsDir.absoluteFilePath(fileName));
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109 | QObject *plugin = pluginLoader.instance();
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110 | if (plugin) {
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111 | echoInterface = qobject_cast<EchoInterface *>(plugin);
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112 | if (echoInterface)
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113 | return true;
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114 | }
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115 | }
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116 |
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117 | return false;
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118 | }
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119 | //! [3]
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