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
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
/*
main.cpp
A simple example of how to access items from an existing model.
*/
#include <QtGui>
/*!
Create a default directory model and, using the index-based interface to
the model and some QLabel widgets, populate the window's layout with the
names of objects in the directory.
Note that we only want to read the filenames in the highest level of the
directory, so we supply a default (invalid) QModelIndex to the model in
order to indicate that we want top-level items.
*/
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QWidget *window = new QWidget;
QVBoxLayout *layout = new QVBoxLayout(window);
QLabel *title = new QLabel("Some items from the directory model", window);
title->setBackgroundRole(QPalette::Base);
title->setMargin(8);
layout->addWidget(title);
//! [0]
QDirModel *model = new QDirModel;
QModelIndex parentIndex = model->index(QDir::currentPath());
int numRows = model->rowCount(parentIndex);
//! [0]
//! [1]
for (int row = 0; row < numRows; ++row) {
QModelIndex index = model->index(row, 0, parentIndex);
//! [1]
//! [2]
QString text = model->data(index, Qt::DisplayRole).toString();
// Display the text in a widget.
//! [2]
QLabel *label = new QLabel(text, window);
layout->addWidget(label);
//! [3]
}
//! [3]
window->setWindowTitle("A simple model example");
window->show();
return app.exec();
}
|
