2b75c156b6
Change-Id: I6441ff931dbd33b698d762e6f6784898f3f60fe7 Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
135 lines
4.4 KiB
C++
135 lines
4.4 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "layoutitem.h"
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#include <QGradient>
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#include <QGraphicsLinearLayout>
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#include <QPainter>
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//! [0]
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LayoutItem::LayoutItem(QGraphicsItem *parent/* = 0*/)
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: QGraphicsLayoutItem(), QGraphicsItem(parent)
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{
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m_pix = new QPixmap(QLatin1String(":/images/block.png"));
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setGraphicsItem(this);
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}
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//! [0]
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LayoutItem::~LayoutItem()
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{
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delete m_pix;
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}
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//! [1]
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void LayoutItem::paint(QPainter *painter,
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const QStyleOptionGraphicsItem *option, QWidget *widget /*= 0*/)
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{
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Q_UNUSED(widget);
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Q_UNUSED(option);
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QRectF frame(QPointF(0,0), geometry().size());
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qreal w = m_pix->width();
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qreal h = m_pix->height();
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QGradientStops stops;
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//! [1]
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//! [2]
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// paint a background rect (with gradient)
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QLinearGradient gradient(frame.topLeft(), frame.topLeft() + QPointF(200,200));
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stops << QGradientStop(0.0, QColor(60, 60, 60));
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stops << QGradientStop(frame.height() / 2 / frame.height(), QColor(102, 176, 54));
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//stops << QGradientStop(((frame.height() + h)/2 )/frame.height(), QColor(157, 195, 55));
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stops << QGradientStop(1.0, QColor(215, 215, 215));
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gradient.setStops(stops);
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painter->setBrush(QBrush(gradient));
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painter->drawRoundedRect(frame, 10.0, 10.0);
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// paint a rect around the pixmap (with gradient)
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QPointF pixpos = frame.center() - (QPointF(w, h) / 2);
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QRectF innerFrame(pixpos, QSizeF(w, h));
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innerFrame.adjust(-4, -4, 4, 4);
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gradient.setStart(innerFrame.topLeft());
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gradient.setFinalStop(innerFrame.bottomRight());
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stops.clear();
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stops << QGradientStop(0.0, QColor(215, 255, 200));
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stops << QGradientStop(0.5, QColor(102, 176, 54));
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stops << QGradientStop(1.0, QColor(0, 0, 0));
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gradient.setStops(stops);
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painter->setBrush(QBrush(gradient));
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painter->drawRoundedRect(innerFrame, 10.0, 10.0);
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painter->drawPixmap(pixpos, *m_pix);
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}
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//! [2]
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//! [3]
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QRectF LayoutItem::boundingRect() const
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{
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return QRectF(QPointF(0,0), geometry().size());
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}
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//! [3]
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//! [4]
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void LayoutItem::setGeometry(const QRectF &geom)
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{
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prepareGeometryChange();
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QGraphicsLayoutItem::setGeometry(geom);
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setPos(geom.topLeft());
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}
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//! [4]
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//! [5]
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QSizeF LayoutItem::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
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{
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switch (which) {
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case Qt::MinimumSize:
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case Qt::PreferredSize:
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// Do not allow a size smaller than the pixmap with two frames around it.
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return m_pix->size() + QSize(12, 12);
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case Qt::MaximumSize:
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return QSizeF(1000,1000);
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default:
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break;
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}
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return constraint;
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}
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//! [5]
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