1 files changed, 106 insertions, 0 deletions
diff --git a/doc/src/snippets/code/doc_src_qt4-intro.cpp b/doc/src/snippets/code/doc_src_qt4-intro.cpp
new file mode 100644
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+++ b/doc/src/snippets/code/doc_src_qt4-intro.cpp
@@ -0,0 +1,106 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the documentation 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."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [3]
+#include <QClassName>
+//! [3]
+
+
+//! [4]
+#include <QString>
+#include <QApplication>
+#include <QSqlTableModel>
+//! [4]
+
+
+//! [5]
+#include <qclassname.h>
+//! [5]
+
+
+//! [6]
+#include <QtCore>
+//! [6]
+
+
+//! [7]
+using namespace Qt;
+//! [7]
+
+
+//! [8]
+QLabel *label1 = new QLabel("Hello", this);
+QLabel *label2 = new QLabel(this, "Hello");
+//! [8]
+
+
+//! [9]
+MyWidget::MyWidget(QWidget *parent, const char *name)
+    : QWidget(parent, name)
+{
+    ...
+}
+//! [9]
+
+
+//! [10]
+// DEPRECATED
+if (obj->inherits("QPushButton")) {
+    QPushButton *pushButton = (QPushButton *)obj;
+    ...
+}
+//! [10]
+
+
+//! [11]
+QPushButton *pushButton = qobject_cast<QPushButton *>(obj);
+if (pushButton) {
+    ...
+}
+//! [11]
+
+
+//! [12]
+QLabel *label = new QLabel;
+QPointer<QLabel> safeLabel = label;
+safeLabel->setText("Hello world!");
+delete label;
+// safeLabel is now 0, whereas label is a dangling pointer
+//! [12]