Largely rewrite the Using QML in C++ Applications documentation. It

now has an overview of different approaches to QML/C++ integration
and demonstrates how to pass data between QML and C++ through
properties/functions/signals. The part in the old docs that focused
on QDeclarativeContext has been merged into the QDeclarativeContext
class docs (although most of the info was largely covered in there
already) and the part that covered Network Components has been
moved to the QDeclarativeComponent class docs. The custom enum
types example previously in extending-tutorial.qdoc has been
moved to these new docs.

Task-number: QTBUG-14923

1 files changed, 81 insertions, 0 deletions

diff --git a/doc/src/snippets/declarative/qtbinding/signals-cpp/main.cpp b/doc/src/snippets/declarative/qtbinding/signals-cpp/main.cpp
new file mode 100644
index 0000000..e5dd33c
--- /dev/null
+++ b/doc/src/snippets/declarative/qtbinding/signals-cpp/main.cpp
@@ -0,0 +1,81 @@
+/****************************************************************************
+**
+** 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 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."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <QtCore>
+#include <QtDeclarative>
+
+#include "imageviewer.h"
+
+
+ImageViewer::ImageViewer(QDeclarativeItem *item)
+    : QDeclarativeItem(item)
+{
+    QTimer::singleShot(0, this, SLOT(emitSignals()));
+}
+
+void ImageViewer::emitSignals()
+{
+    emit imageChanged();
+    emit loadingError("some error message");
+}
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+
+    qmlRegisterType<ImageViewer>("MyLibrary", 1, 0, "ImageViewer");
+
+    QDeclarativeView standalone;
+    standalone.setSource(QUrl::fromLocalFile("standalone.qml"));
+    standalone.show();
+
+//![connections]
+ImageViewer viewer;
+
+QDeclarativeView view;
+view.rootContext()->setContextProperty("imageViewer", &viewer);
+
+view.setSource(QUrl::fromLocalFile("MyItem.qml"));
+view.show();
+//![connections]
+
+    return app.exec();
+}
+
+