3b0c2b7c1b
Q_DECL_OVERRIDE (which expands to 'override' for supported compiler) helps to declare the intent (that it is an overridden function) and force compilation error when there is no such virtual function in the base class. The examples should show the best practice of having it, as it may save the programmer quite some time in case of change of API or typo in the function name or arguments. This change was done automatically with clang-modernize -add-override -override-macros And fixed MSVC compilation by removing inline for TorrentViewDelegate::paint Change-Id: Ice66ae93fae571266f908703d5b8892b2c1ebb1a Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
281 lines
9.1 KiB
C++
281 lines
9.1 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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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 Digia Plc and its Subsidiary(-ies) nor the names
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** of its 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 <QApplication>
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#include <QLabel>
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#include <QPainter>
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#include <QPushButton>
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#include <QGraphicsAnchorLayout>
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#include <QGraphicsProxyWidget>
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#include <QGraphicsScene>
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#include <QGraphicsSceneResizeEvent>
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#include <QGraphicsView>
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#include <QGraphicsWidget>
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class GraphicsView : public QGraphicsView
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{
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public:
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GraphicsView(QGraphicsScene *scene, QGraphicsWidget *widget)
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: QGraphicsView(scene), w(widget)
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{
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}
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virtual void resizeEvent(QResizeEvent *event) Q_DECL_OVERRIDE
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{
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w->setGeometry(0, 0, event->size().width(), event->size().height());
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}
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QGraphicsWidget *w;
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};
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class PixmapWidget : public QGraphicsLayoutItem
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{
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public:
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PixmapWidget(const QPixmap &pix)
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: QGraphicsLayoutItem()
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{
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original = new QGraphicsPixmapItem(pix);
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setGraphicsItem(original);
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original->show();
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r = QRectF(QPointF(0, 0), pix.size());
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}
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~PixmapWidget()
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{
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setGraphicsItem(0);
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delete original;
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}
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void setZValue(qreal z)
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{
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original->setZValue(z);
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}
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void setGeometry (const QRectF &rect) Q_DECL_OVERRIDE
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{
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original->setTransform(QTransform::fromScale(rect.width() / r.width(),
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rect.height() / r.height()), true);
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original->setPos(rect.x(), rect.y());
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r = rect;
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}
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protected:
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QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const Q_DECL_OVERRIDE
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{
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Q_UNUSED(constraint);
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QSizeF sh;
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switch (which) {
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case Qt::MinimumSize:
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sh = QSizeF(0, 0);
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break;
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case Qt::PreferredSize:
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sh = QSizeF(50, 50);
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break;
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case Qt::MaximumSize:
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sh = QSizeF(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
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break;
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default:
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break;
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}
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return sh;
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}
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private:
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QGraphicsPixmapItem *original;
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QRectF r;
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};
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class PlaceWidget : public QGraphicsWidget
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{
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Q_OBJECT
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public:
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PlaceWidget(const QPixmap &pix)
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: QGraphicsWidget()
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, original(pix)
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, scaled(pix)
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{
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}
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void paint(QPainter *painter, const QStyleOptionGraphicsItem*, QWidget*) Q_DECL_OVERRIDE
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{
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QPointF reflection = QPointF();
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reflection.setY(scaled.height() + 2);
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painter->drawPixmap(QPointF(), scaled);
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QPixmap tmp(scaled.size());
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tmp.fill(Qt::transparent);
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QPainter p(&tmp);
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// create gradient
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QPoint p1(scaled.width() / 2, 0);
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QPoint p2(scaled.width() / 2, scaled.height());
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QLinearGradient linearGrad(p1, p2);
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linearGrad.setColorAt(0, QColor(0, 0, 0, 0));
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linearGrad.setColorAt(0.65, QColor(0, 0, 0, 127));
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linearGrad.setColorAt(1, QColor(0, 0, 0, 255));
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// apply 'mask'
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p.setBrush(linearGrad);
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p.fillRect(0, 0, tmp.width(), tmp.height(), QBrush(linearGrad));
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p.fillRect(0, 0, tmp.width(), tmp.height(), QBrush(linearGrad));
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// paint the image flipped
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p.setCompositionMode(QPainter::CompositionMode_DestinationOver);
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p.drawPixmap(0, 0, QPixmap::fromImage(scaled.toImage().mirrored(false, true)));
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p.end();
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painter->drawPixmap(reflection, tmp);
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}
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void resizeEvent(QGraphicsSceneResizeEvent *event) Q_DECL_OVERRIDE
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{
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QSize newSize = event->newSize().toSize();
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newSize.setHeight(newSize.height() / 2);
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scaled = original.scaled(newSize);
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}
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QRectF boundingRect() const Q_DECL_OVERRIDE
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{
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QSize size(scaled.width(), scaled.height() * 2 + 2);
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return QRectF(QPointF(0, 0), size);
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}
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private:
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QPixmap original;
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QPixmap scaled;
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};
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int main(int argc, char *argv[])
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{
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Q_INIT_RESOURCE(weatheranchorlayout);
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QApplication app(argc, argv);
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QGraphicsScene scene;
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scene.setSceneRect(0, 0, 800, 480);
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// pixmaps widgets
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PixmapWidget *title = new PixmapWidget(QPixmap(":/images/title.jpg"));
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PlaceWidget *place = new PlaceWidget(QPixmap(":/images/place.jpg"));
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PixmapWidget *details = new PixmapWidget(QPixmap(":/images/5days.jpg"));
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PixmapWidget *sunnyWeather = new PixmapWidget(QPixmap(":/images/weather-few-clouds.png"));
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PixmapWidget *tabbar = new PixmapWidget(QPixmap(":/images/tabbar.jpg"));
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// setup sizes
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title->setPreferredSize(QSizeF(348, 45));
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title->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
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place->setPreferredSize(QSizeF(96, 72));
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place->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
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details->setMinimumSize(QSizeF(200, 112));
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details->setPreferredSize(QSizeF(200, 112));
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details->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
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tabbar->setPreferredSize(QSizeF(70, 24));
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tabbar->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
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sunnyWeather->setPreferredSize(QSizeF(128, 97));
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sunnyWeather->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
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sunnyWeather->setZValue(9999);
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// start anchor layout
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QGraphicsAnchorLayout *layout = new QGraphicsAnchorLayout;
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layout->setSpacing(0);
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// setup the main widget
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QGraphicsWidget *widget = new QGraphicsWidget(0, Qt::Window);
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QPalette p;
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p.setColor(QPalette::Window, Qt::black);
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widget->setPalette(p);
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widget->setPos(20, 20);
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widget->setLayout(layout);
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// vertical anchors
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QGraphicsAnchor *anchor = layout->addAnchor(title, Qt::AnchorTop, layout, Qt::AnchorTop);
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anchor = layout->addAnchor(place, Qt::AnchorTop, title, Qt::AnchorBottom);
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anchor->setSpacing(12);
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anchor = layout->addAnchor(place, Qt::AnchorBottom, layout, Qt::AnchorBottom);
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anchor->setSpacing(12);
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anchor = layout->addAnchor(sunnyWeather, Qt::AnchorTop, title, Qt::AnchorTop);
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anchor = layout->addAnchor(sunnyWeather, Qt::AnchorBottom, layout, Qt::AnchorVerticalCenter);
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anchor = layout->addAnchor(tabbar, Qt::AnchorTop, title, Qt::AnchorBottom);
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anchor->setSpacing(5);
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anchor = layout->addAnchor(details, Qt::AnchorTop, tabbar, Qt::AnchorBottom);
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anchor->setSpacing(2);
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anchor = layout->addAnchor(details, Qt::AnchorBottom, layout, Qt::AnchorBottom);
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anchor->setSpacing(12);
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// horizontal anchors
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anchor = layout->addAnchor(layout, Qt::AnchorLeft, title, Qt::AnchorLeft);
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anchor = layout->addAnchor(title, Qt::AnchorRight, layout, Qt::AnchorRight);
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anchor = layout->addAnchor(place, Qt::AnchorLeft, layout, Qt::AnchorLeft);
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anchor->setSpacing(15);
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anchor = layout->addAnchor(place, Qt::AnchorRight, details, Qt::AnchorLeft);
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anchor->setSpacing(35);
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anchor = layout->addAnchor(sunnyWeather, Qt::AnchorLeft, place, Qt::AnchorHorizontalCenter);
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anchor = layout->addAnchor(sunnyWeather, Qt::AnchorRight, layout, Qt::AnchorHorizontalCenter);
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anchor = layout->addAnchor(tabbar, Qt::AnchorHorizontalCenter, details, Qt::AnchorHorizontalCenter);
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anchor = layout->addAnchor(details, Qt::AnchorRight, layout, Qt::AnchorRight);
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// QGV setup
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scene.addItem(widget);
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scene.setBackgroundBrush(Qt::white);
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QGraphicsView *view = new QGraphicsView(&scene);
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view->show();
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return app.exec();
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}
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#include "main.moc"
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