Doc: Added the missing example snippets

The snippet files referred were outside the scope exampledirs for
QtCore. I made of a copy of those files in the snippets folder to
fix this issue.

Task-number: QTBUG-29755
Change-Id: I2f765104394071d035e9cee610945ae290033deb
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Reviewed-by: Martin Smith <martin.smith@digia.com>
Reviewed-by: Nico Vertriest <nico.vertriest@digia.com>

2 files changed, 179 insertions, 0 deletions

diff --git a/src/corelib/doc/snippets/plugins/extrafiltersplugin.h b/src/corelib/doc/snippets/plugins/extrafiltersplugin.h
new file mode 100644
index 0000000000..7add7abb53
--- /dev/null
+++ b/src/corelib/doc/snippets/plugins/extrafiltersplugin.h
@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the examples 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 Digia Plc 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef EXTRAFILTERSPLUGIN_H
+#define EXTRAFILTERSPLUGIN_H
+
+//! [0]
+#include <QObject>
+#include <QtPlugin>
+#include <QStringList>
+#include <QImage>
+
+#include <plugandpaint/interfaces.h>
+
+class ExtraFiltersPlugin : public QObject, public FilterInterface
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.Examples.PlugAndPaint.FilterInterface" FILE "extrafilters.json")
+    Q_INTERFACES(FilterInterface)
+
+public:
+    QStringList filters() const;
+    QImage filterImage(const QString &filter, const QImage &image,
+                       QWidget *parent);
+};
+//! [0]
+
+#endif
diff --git a/src/corelib/doc/snippets/plugins/interfaces.h b/src/corelib/doc/snippets/plugins/interfaces.h
new file mode 100644
index 0000000000..b2261a1eb2
--- /dev/null
+++ b/src/corelib/doc/snippets/plugins/interfaces.h
@@ -0,0 +1,114 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the examples 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 Digia Plc 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef INTERFACES_H
+#define INTERFACES_H
+
+#include <QtPlugin>
+
+QT_BEGIN_NAMESPACE
+class QImage;
+class QPainter;
+class QWidget;
+class QPainterPath;
+class QPoint;
+class QRect;
+class QString;
+class QStringList;
+QT_END_NAMESPACE
+
+//! [0]
+class BrushInterface
+{
+public:
+    virtual ~BrushInterface() {}
+
+    virtual QStringList brushes() const = 0;
+    virtual QRect mousePress(const QString &brush, QPainter &painter,
+                             const QPoint &pos) = 0;
+    virtual QRect mouseMove(const QString &brush, QPainter &painter,
+                            const QPoint &oldPos, const QPoint &newPos) = 0;
+    virtual QRect mouseRelease(const QString &brush, QPainter &painter,
+                               const QPoint &pos) = 0;
+};
+//! [0]
+
+//! [1]
+class ShapeInterface
+{
+public:
+    virtual ~ShapeInterface() {}
+
+    virtual QStringList shapes() const = 0;
+    virtual QPainterPath generateShape(const QString &shape,
+                                       QWidget *parent) = 0;
+};
+//! [1]
+
+//! [2]
+class FilterInterface
+{
+public:
+    virtual ~FilterInterface() {}
+
+    virtual QStringList filters() const = 0;
+    virtual QImage filterImage(const QString &filter, const QImage &image,
+                               QWidget *parent) = 0;
+};
+//! [2]
+
+QT_BEGIN_NAMESPACE
+//! [3] //! [4]
+#define BrushInterface_iid "org.qt-project.Qt.Examples.PlugAndPaint.BrushInterface"
+
+Q_DECLARE_INTERFACE(BrushInterface, BrushInterface_iid)
+//! [3]
+
+#define ShapeInterface_iid  "org.qt-project.Qt.Examples.PlugAndPaint.ShapeInterface"
+
+Q_DECLARE_INTERFACE(ShapeInterface, ShapeInterface_iid)
+//! [5]
+#define FilterInterface_iid "org.qt-project.Qt.Examples.PlugAndPaint.FilterInterface"
+
+Q_DECLARE_INTERFACE(FilterInterface, FilterInterface_iid)
+//! [4] //! [5]
+QT_END_NAMESPACE
+
+#endif