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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QWidget>
#include <QAbstractButton>
#include <QPushButton>
//! [4]
#include <QApplication>
#include <QMessageBox>
int main(int argc, char *argv[])
{
QT_REQUIRE_VERSION(argc, argv, "4.0.2")
QApplication app(argc, argv);
//...
return app.exec();
}
//! [4]
class MyWidget : public QWidget
{
Q_OBJECT
public:
void QMessageBoxExample(QWidget &myWidget);
};
void MyWidget::QMessageBoxExample(QWidget &myWidget)
{
{
//! [0]
int ret = QMessageBox::warning(this, tr("My Application"),
tr("The document has been modified.\n"
"Do you want to save your changes?"),
QMessageBox::Save | QMessageBox::Discard
| QMessageBox::Cancel,
QMessageBox::Save);
//! [0]
}
{
//! [2]
QMessageBox msgBox(this);
QPushButton *connectButton = msgBox.addButton(tr("Connect"), QMessageBox::ActionRole);
QPushButton *abortButton = msgBox.addButton(QMessageBox::Abort);
msgBox.exec();
if (msgBox.clickedButton() == connectButton) {
// connect
} else if (msgBox.clickedButton() == abortButton) {
// abort
}
//! [2]
}
{
//! [3]
QMessageBox messageBox(this);
QAbstractButton *disconnectButton =
messageBox.addButton(tr("Disconnect"), QMessageBox::ActionRole);
//...
messageBox.exec();
if (messageBox.clickedButton() == disconnectButton) {
//...
}
//! [3]
}
{
//! [5]
QMessageBox msgBox(this);
msgBox.setText("The document has been modified.");
msgBox.exec();
//! [5]
}
{
//! [6]
QMessageBox msgBox(this);
msgBox.setText("The document has been modified.");
msgBox.setInformativeText("Do you want to save your changes?");
msgBox.setStandardButtons(QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
msgBox.setDefaultButton(QMessageBox::Save);
int ret = msgBox.exec();
//! [6]
}
{
int ret;
//! [7]
switch (ret) {
case QMessageBox::Save:
// Save was clicked
break;
case QMessageBox::Discard:
// Don't Save was clicked
break;
case QMessageBox::Cancel:
// Cancel was clicked
break;
default:
// should never be reached
break;
}
//! [7]
}
}