Doc: drop Lighting Effect Example
Task-number: QTBUG-60635 Change-Id: If455a778ff6ebd53d8110b3dc25d8b9e27255bac Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io> Reviewed-by: Nico Vertriest <nico.vertriest@qt.io>
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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the documentation of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:FDL$
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** Commercial License Usage
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** GNU Free Documentation License Usage
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** Alternatively, this file may be used under the terms of the GNU Free
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** Documentation License version 1.3 as published by the Free Software
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** Foundation and appearing in the file included in the packaging of
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** this file. Please review the following information to ensure
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** the GNU Free Documentation License version 1.3 requirements
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** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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/*!
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\example effects/lighting
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\title Lighting Effect Example
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\ingroup examples-graphicsview-graphicseffects
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\brief Demonstrates how to apply effects on items in the view
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\image lightingeffect-example.png
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*/
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subdirs
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subdirs
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SUBDIRS = \
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SUBDIRS = \
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blurpicker \
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blurpicker \
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lighting \
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fademessage
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fademessage
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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://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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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
|
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** accordance with the commercial license agreement provided with the
|
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** Software or, alternatively, in accordance with the terms contained in
|
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** 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 "lighting.h"
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#include <QtWidgets>
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#include <QtCore/qmath.h>
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Lighting::Lighting(QWidget *parent): QGraphicsView(parent), angle(0.0)
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{
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setScene(&m_scene);
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setupScene();
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QTimer *timer = new QTimer(this);
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connect(timer, SIGNAL(timeout()), SLOT(animate()));
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timer->setInterval(30);
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timer->start();
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setRenderHint(QPainter::Antialiasing, true);
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setFrameStyle(QFrame::NoFrame);
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}
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void Lighting::setupScene()
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{
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m_scene.setSceneRect(-300, -200, 600, 460);
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QLinearGradient linearGrad(QPointF(-100, -100), QPointF(100, 100));
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linearGrad.setColorAt(0, QColor(255, 255, 255));
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linearGrad.setColorAt(1, QColor(192, 192, 255));
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setBackgroundBrush(linearGrad);
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QRadialGradient radialGrad(30, 30, 30);
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radialGrad.setColorAt(0, Qt::yellow);
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radialGrad.setColorAt(0.2, Qt::yellow);
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radialGrad.setColorAt(1, Qt::transparent);
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QPixmap pixmap(60, 60);
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pixmap.fill(Qt::transparent);
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QPainter painter(&pixmap);
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painter.setPen(Qt::NoPen);
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painter.setBrush(radialGrad);
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painter.drawEllipse(0, 0, 60, 60);
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painter.end();
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m_lightSource = m_scene.addPixmap(pixmap);
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m_lightSource->setZValue(2);
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for (int i = -2; i < 3; ++i)
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for (int j = -2; j < 3; ++j) {
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QAbstractGraphicsShapeItem *item;
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if ((i + j) & 1)
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item = new QGraphicsEllipseItem(0, 0, 50, 50);
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else
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item = new QGraphicsRectItem(0, 0, 50, 50);
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item->setPen(QPen(Qt::black, 1));
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item->setBrush(QBrush(Qt::white));
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QGraphicsDropShadowEffect *effect = new QGraphicsDropShadowEffect;
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effect->setBlurRadius(8);
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item->setGraphicsEffect(effect);
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item->setZValue(1);
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item->setPos(i * 80, j * 80);
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m_scene.addItem(item);
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m_items << item;
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}
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}
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void Lighting::animate()
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{
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angle += qDegreesToRadians(qreal(6));
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qreal xs = 200 * qSin(angle) - 40 + 25;
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qreal ys = 200 * qCos(angle) - 40 + 25;
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m_lightSource->setPos(xs, ys);
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for (int i = 0; i < m_items.size(); ++i) {
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QGraphicsItem *item = m_items.at(i);
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Q_ASSERT(item);
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QGraphicsDropShadowEffect *effect = static_cast<QGraphicsDropShadowEffect *>(item->graphicsEffect());
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Q_ASSERT(effect);
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QPointF delta(item->x() - xs, item->y() - ys);
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effect->setOffset(delta.toPoint() / 30);
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qreal dx = delta.x();
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qreal dy = delta.y();
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qreal dd = qSqrt(dx * dx + dy * dy);
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QColor color = effect->color();
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color.setAlphaF(qBound(0.4, 1 - dd / 200.0, 0.7));
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effect->setColor(color);
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}
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m_scene.update();
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}
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void Lighting::resizeEvent(QResizeEvent * /* event */)
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{
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}
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@ -1,80 +0,0 @@
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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://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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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
|
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** 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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#ifndef LIGHTING_H
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#define LIGHTING_H
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#include <QGraphicsEffect>
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#include <QGraphicsView>
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class Lighting: public QGraphicsView
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{
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Q_OBJECT
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public:
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Lighting(QWidget *parent = 0);
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private slots:
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void animate();
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private:
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void setupScene();
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protected:
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void resizeEvent(QResizeEvent *event) override;
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private:
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qreal angle;
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QGraphicsScene m_scene;
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QGraphicsItem *m_lightSource;
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QList<QGraphicsItem*> m_items;
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};
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#endif // LIGHTING_H
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QT += widgets
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SOURCES += main.cpp lighting.cpp
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HEADERS += lighting.h
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# install
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target.path = $$[QT_INSTALL_EXAMPLES]/widgets/effects/lighting
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INSTALLS += target
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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://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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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
|
|
||||||
** accordance with the commercial license agreement provided with the
|
|
||||||
** Software or, alternatively, in accordance with the terms contained in
|
|
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** a written agreement between you and The Qt Company. For licensing terms
|
|
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** and conditions see https://www.qt.io/terms-conditions. For further
|
|
||||||
** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** 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:
|
|
||||||
** * 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
|
|
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** distribution.
|
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** * Neither the name of The Qt Company Ltd nor the names of its
|
|
||||||
** contributors may be used to endorse or promote products derived
|
|
||||||
** 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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|
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
||||||
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
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** 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
|
|
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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 "lighting.h"
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#include <QApplication>
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int main(int argc, char **argv)
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{
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QApplication app(argc, argv);
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Lighting lighting;
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lighting.setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Lighting and Shadows"));
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lighting.resize(640, 480);
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lighting.show();
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return app.exec();
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}
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