source: trunk/examples/tools/echoplugin/echowindow/echowindow.cpp@ 5

Last change on this file since 5 was 2, checked in by Dmitry A. Kuminov, 16 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.

File size: 3.9 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Qt Software Information ([email protected])
5**
6** This file is part of the examples of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial Usage
10** Licensees holding valid Qt Commercial licenses may use this file in
11** accordance with the Qt Commercial License Agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and Nokia.
14**
15** GNU Lesser General Public License Usage
16** Alternatively, this file may be used under the terms of the GNU Lesser
17** General Public License version 2.1 as published by the Free Software
18** Foundation and appearing in the file LICENSE.LGPL included in the
19** packaging of this file. Please review the following information to
20** ensure the GNU Lesser General Public License version 2.1 requirements
21** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
22**
23** In addition, as a special exception, Nokia gives you certain
24** additional rights. These rights are described in the Nokia Qt LGPL
25** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
26** package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you are unsure which license is appropriate for your use, please
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38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include <QtGui>
43
44#include "echowindow.h"
45
46//! [0]
47EchoWindow::EchoWindow()
48{
49 createGUI();
50 setLayout(layout);
51 setWindowTitle("Echo Plugin Example");
52
53 if (!loadPlugin()) {
54 QMessageBox::information(this, "Error", "Could not load the plugin");
55 lineEdit->setEnabled(false);
56 button->setEnabled(false);
57 }
58}
59//! [0]
60
61//! [1]
62void EchoWindow::sendEcho()
63{
64 QString text = echoInterface->echo(lineEdit->text());
65 label->setText(text);
66}
67//! [1]
68
69//! [2]
70void EchoWindow::createGUI()
71{
72 lineEdit = new QLineEdit;
73 label = new QLabel;
74 label->setFrameStyle(QFrame::Box | QFrame::Plain);
75 button = new QPushButton(tr("Send Message"));
76
77 connect(lineEdit, SIGNAL(editingFinished()),
78 this, SLOT(sendEcho()));
79 connect(button, SIGNAL(clicked()),
80 this, SLOT(sendEcho()));
81
82 layout = new QGridLayout;
83 layout->addWidget(new QLabel(tr("Message:")), 0, 0);
84 layout->addWidget(lineEdit, 0, 1);
85 layout->addWidget(new QLabel(tr("Answer:")), 1, 0);
86 layout->addWidget(label, 1, 1);
87 layout->addWidget(button, 2, 1, Qt::AlignRight);
88 layout->setSizeConstraint(QLayout::SetFixedSize);
89}
90//! [2]
91
92//! [3]
93bool EchoWindow::loadPlugin()
94{
95 QDir pluginsDir(qApp->applicationDirPath());
96#if defined(Q_OS_WIN)
97 if (pluginsDir.dirName().toLower() == "debug" || pluginsDir.dirName().toLower() == "release")
98 pluginsDir.cdUp();
99#elif defined(Q_OS_MAC)
100 if (pluginsDir.dirName() == "MacOS") {
101 pluginsDir.cdUp();
102 pluginsDir.cdUp();
103 pluginsDir.cdUp();
104 }
105#endif
106 pluginsDir.cd("plugins");
107 foreach (QString fileName, pluginsDir.entryList(QDir::Files)) {
108 QPluginLoader pluginLoader(pluginsDir.absoluteFilePath(fileName));
109 QObject *plugin = pluginLoader.instance();
110 if (plugin) {
111 echoInterface = qobject_cast<EchoInterface *>(plugin);
112 if (echoInterface)
113 return true;
114 }
115 }
116
117 return false;
118}
119//! [3]
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