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Diffstat (limited to 'examples/widgets/itemviews/pixelator/pixeldelegate.cpp')
-rw-r--r-- | examples/widgets/itemviews/pixelator/pixeldelegate.cpp | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/examples/widgets/itemviews/pixelator/pixeldelegate.cpp b/examples/widgets/itemviews/pixelator/pixeldelegate.cpp new file mode 100644 index 0000000000..5904c2e680 --- /dev/null +++ b/examples/widgets/itemviews/pixelator/pixeldelegate.cpp @@ -0,0 +1,107 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** 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 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 <QtWidgets> + +#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(option.palette.text()); +//! [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] |