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40
41 #include <QtGui>
42
43 #include "echowindow.h"
44
45 //! [0]
EchoWindow()46 EchoWindow::EchoWindow()
47 {
48 createGUI();
49 setLayout(layout);
50 setWindowTitle("Echo Plugin Example");
51
52 if (!loadPlugin()) {
53 QMessageBox::information(this, "Error", "Could not load the plugin");
54 lineEdit->setEnabled(false);
55 button->setEnabled(false);
56 }
57 }
58 //! [0]
59
60 //! [1]
sendEcho()61 void EchoWindow::sendEcho()
62 {
63 QString text = echoInterface->echo(lineEdit->text());
64 label->setText(text);
65 }
66 //! [1]
67
68 //! [2]
createGUI()69 void EchoWindow::createGUI()
70 {
71 lineEdit = new QLineEdit;
72 label = new QLabel;
73 label->setFrameStyle(QFrame::Box | QFrame::Plain);
74 button = new QPushButton(tr("Send Message"));
75
76 connect(lineEdit, SIGNAL(editingFinished()),
77 this, SLOT(sendEcho()));
78 connect(button, SIGNAL(clicked()),
79 this, SLOT(sendEcho()));
80
81 layout = new QGridLayout;
82 layout->addWidget(new QLabel(tr("Message:")), 0, 0);
83 layout->addWidget(lineEdit, 0, 1);
84 layout->addWidget(new QLabel(tr("Answer:")), 1, 0);
85 layout->addWidget(label, 1, 1);
86 layout->addWidget(button, 2, 1, Qt::AlignRight);
87 layout->setSizeConstraint(QLayout::SetFixedSize);
88 }
89 //! [2]
90
91 //! [3]
loadPlugin()92 bool EchoWindow::loadPlugin()
93 {
94 QDir pluginsDir(qApp->applicationDirPath());
95 #if defined(Q_OS_WIN)
96 if (pluginsDir.dirName().toLower() == "debug" || pluginsDir.dirName().toLower() == "release")
97 pluginsDir.cdUp();
98 #elif defined(Q_OS_MAC)
99 if (pluginsDir.dirName() == "MacOS") {
100 pluginsDir.cdUp();
101 pluginsDir.cdUp();
102 pluginsDir.cdUp();
103 }
104 #endif
105 pluginsDir.cd("plugins");
106 foreach (QString fileName, pluginsDir.entryList(QDir::Files)) {
107 QPluginLoader pluginLoader(pluginsDir.absoluteFilePath(fileName));
108 QObject *plugin = pluginLoader.instance();
109 if (plugin) {
110 echoInterface = qobject_cast<EchoInterface *>(plugin);
111 if (echoInterface)
112 return true;
113 }
114 }
115
116 return false;
117 }
118 //! [3]
119