1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include "echowindow.h"
//! [0]
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);
}
}
//! [0]
//! [1]
void EchoWindow::sendEcho()
{
QString text = echoInterface->echo(lineEdit->text());
label->setText(text);
}
//! [1]
//! [2]
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);
}
//! [2]
//! [3]
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;
}
//! [3]
|
