examples/itemviews/pixelator/pixeldelegate.cpp
changeset 0 1918ee327afb
child 4 3b1da2848fc7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/itemviews/pixelator/pixeldelegate.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,108 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "pixeldelegate.h"
+
+//! [0]
+PixelDelegate::PixelDelegate(QObject *parent)
+    : QAbstractItemDelegate(parent)
+{
+    pixelSize = 12;
+}
+//! [0]
+
+//! [1]
+void PixelDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
+                          const QModelIndex &index) const
+{
+//! [2]
+    if (option.state & QStyle::State_Selected)
+        painter->fillRect(option.rect, option.palette.highlight());
+//! [1]
+
+//! [3]
+    int size = qMin(option.rect.width(), option.rect.height());
+//! [3] //! [4]
+    int brightness = index.model()->data(index, Qt::DisplayRole).toInt();
+    double radius = (size/2.0) - (brightness/255.0 * size/2.0);
+    if (radius == 0.0)
+        return;
+//! [4]
+
+//! [5]
+    painter->save();
+//! [5] //! [6]
+    painter->setRenderHint(QPainter::Antialiasing, true);
+//! [6] //! [7]
+    painter->setPen(Qt::NoPen);
+//! [7] //! [8]
+    if (option.state & QStyle::State_Selected)
+//! [8] //! [9]
+        painter->setBrush(option.palette.highlightedText());
+    else
+//! [2]
+        painter->setBrush(QBrush(Qt::black));
+//! [9]
+
+//! [10]
+    painter->drawEllipse(QRectF(option.rect.x() + option.rect.width()/2 - radius,
+                                option.rect.y() + option.rect.height()/2 - radius,
+                                2*radius, 2*radius));
+    painter->restore();
+}
+//! [10]
+
+//! [11]
+QSize PixelDelegate::sizeHint(const QStyleOptionViewItem & /* option */,
+                              const QModelIndex & /* index */) const
+{
+    return QSize(pixelSize, pixelSize);
+}
+//! [11]
+
+//! [12]
+void PixelDelegate::setPixelSize(int size)
+{
+    pixelSize = size;
+}
+//! [12]