blob: 177446aff9c5801e378e3d88b39d2fc5cefe5f8a (
plain)
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
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QLabel>
#include <QPushButton>
#include "qtcast.h"
MyWidget::MyWidget()
{
//! [0]
QObject *obj = new MyWidget;
//! [0]
//! [1]
QWidget *widget = qobject_cast<QWidget *>(obj);
//! [1]
//! [2]
MyWidget *myWidget = qobject_cast<MyWidget *>(obj);
//! [2]
//! [3]
QLabel *label = qobject_cast<QLabel *>(obj);
//! [3] //! [4]
// label is 0
//! [4]
//! [5]
if (QLabel *label = qobject_cast<QLabel *>(obj)) {
//! [5] //! [6]
label->setText(tr("Ping"));
} else if (QPushButton *button = qobject_cast<QPushButton *>(obj)) {
button->setText(tr("Pong!"));
}
//! [6]
}
int main()
{
return 0;
}
|
