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| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the examples of the Qt Toolkit. |
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| ****************************************************************************/ |
| |
| #include <QApplication> |
| #include <QLabel> |
| #include <QGraphicsAnchorLayout> |
| #include <QGraphicsProxyWidget> |
| #include <QGraphicsScene> |
| #include <QGraphicsSceneResizeEvent> |
| #include <QGraphicsView> |
| #include <QGraphicsWidget> |
| #include <QPainter> |
| #include <QPushButton> |
| |
| |
| class GraphicsView : public QGraphicsView |
| { |
| public: |
| GraphicsView(QGraphicsScene *scene, QGraphicsWidget *widget) |
| : QGraphicsView(scene), w(widget) |
| { |
| } |
| |
| void resizeEvent(QResizeEvent *event) override |
| { |
| w->setGeometry(0, 0, event->size().width(), event->size().height()); |
| } |
| |
| QGraphicsWidget *w; |
| }; |
| |
| class PixmapWidget : public QGraphicsLayoutItem |
| { |
| public: |
| PixmapWidget(const QPixmap &pix) |
| : QGraphicsLayoutItem(), original(new QGraphicsPixmapItem(pix)) |
| , r(QRectF(QPointF(0, 0), pix.size())) |
| { |
| setGraphicsItem(original); |
| original->show(); |
| } |
| |
| ~PixmapWidget() |
| { |
| setGraphicsItem(nullptr); |
| delete original; |
| } |
| |
| void setZValue(qreal z) |
| { |
| original->setZValue(z); |
| } |
| |
| void setGeometry(const QRectF &rect) override |
| { |
| original->setTransform(QTransform::fromScale(rect.width() / r.width(), |
| rect.height() / r.height()), true); |
| original->setPos(rect.x(), rect.y()); |
| r = rect; |
| } |
| |
| protected: |
| QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const override |
| { |
| Q_UNUSED(constraint); |
| QSizeF sh; |
| switch (which) { |
| case Qt::MinimumSize: |
| sh = QSizeF(0, 0); |
| break; |
| case Qt::PreferredSize: |
| sh = QSizeF(50, 50); |
| break; |
| case Qt::MaximumSize: |
| sh = QSizeF(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX); |
| break; |
| default: |
| break; |
| } |
| return sh; |
| } |
| |
| private: |
| QGraphicsPixmapItem *original; |
| QRectF r; |
| }; |
| |
| |
| class PlaceWidget : public QGraphicsWidget |
| { |
| Q_OBJECT |
| |
| public: |
| PlaceWidget(const QPixmap &pix) |
| : QGraphicsWidget() |
| , original(pix) |
| , scaled(pix) |
| { |
| } |
| |
| void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *) override |
| { |
| const QPointF reflection(0, scaled.height() + 2); |
| |
| painter->drawPixmap(QPointF(), scaled); |
| |
| QPixmap tmp(scaled.size()); |
| tmp.fill(Qt::transparent); |
| QPainter p(&tmp); |
| |
| // create gradient |
| QPoint p1(scaled.width() / 2, 0); |
| QPoint p2(scaled.width() / 2, scaled.height()); |
| QLinearGradient linearGrad(p1, p2); |
| linearGrad.setColorAt(0, QColor(0, 0, 0, 0)); |
| linearGrad.setColorAt(0.65, QColor(0, 0, 0, 127)); |
| linearGrad.setColorAt(1, QColor(0, 0, 0, 255)); |
| |
| // apply 'mask' |
| p.setBrush(linearGrad); |
| p.fillRect(0, 0, tmp.width(), tmp.height(), QBrush(linearGrad)); |
| p.fillRect(0, 0, tmp.width(), tmp.height(), QBrush(linearGrad)); |
| |
| // paint the image flipped |
| p.setCompositionMode(QPainter::CompositionMode_DestinationOver); |
| p.drawPixmap(0, 0, QPixmap::fromImage(scaled.toImage().mirrored(false, true))); |
| p.end(); |
| |
| painter->drawPixmap(reflection, tmp); |
| } |
| |
| void resizeEvent(QGraphicsSceneResizeEvent *event) override |
| { |
| QSize newSize = event->newSize().toSize(); |
| newSize.setHeight(newSize.height() / 2); |
| scaled = original.scaled(newSize); |
| } |
| |
| QRectF boundingRect() const override |
| { |
| QSize size(scaled.width(), scaled.height() * 2 + 2); |
| return QRectF(QPointF(0, 0), size); |
| } |
| |
| private: |
| QPixmap original; |
| QPixmap scaled; |
| }; |
| |
| |
| int main(int argc, char *argv[]) |
| { |
| Q_INIT_RESOURCE(weatheranchorlayout); |
| |
| QApplication app(argc, argv); |
| |
| QGraphicsScene scene; |
| scene.setSceneRect(0, 0, 800, 480); |
| |
| // pixmaps widgets |
| PixmapWidget *title = new PixmapWidget(QPixmap(":/images/title.jpg")); |
| PlaceWidget *place = new PlaceWidget(QPixmap(":/images/place.jpg")); |
| PixmapWidget *details = new PixmapWidget(QPixmap(":/images/5days.jpg")); |
| PixmapWidget *sunnyWeather = new PixmapWidget(QPixmap(":/images/weather-few-clouds.png")); |
| PixmapWidget *tabbar = new PixmapWidget(QPixmap(":/images/tabbar.jpg")); |
| |
| |
| // setup sizes |
| title->setPreferredSize(QSizeF(348, 45)); |
| title->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum); |
| |
| place->setPreferredSize(QSizeF(96, 72)); |
| place->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum); |
| |
| details->setMinimumSize(QSizeF(200, 112)); |
| details->setPreferredSize(QSizeF(200, 112)); |
| details->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum); |
| |
| tabbar->setPreferredSize(QSizeF(70, 24)); |
| tabbar->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum); |
| |
| sunnyWeather->setPreferredSize(QSizeF(128, 97)); |
| sunnyWeather->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum); |
| sunnyWeather->setZValue(9999); |
| |
| // start anchor layout |
| QGraphicsAnchorLayout *layout = new QGraphicsAnchorLayout; |
| layout->setSpacing(0); |
| |
| // setup the main widget |
| QGraphicsWidget *widget = new QGraphicsWidget(nullptr, Qt::Window); |
| QPalette p; |
| p.setColor(QPalette::Window, Qt::black); |
| widget->setPalette(p); |
| widget->setPos(20, 20); |
| widget->setLayout(layout); |
| |
| // vertical anchors |
| QGraphicsAnchor *anchor = layout->addAnchor(title, Qt::AnchorTop, layout, Qt::AnchorTop); |
| anchor = layout->addAnchor(place, Qt::AnchorTop, title, Qt::AnchorBottom); |
| anchor->setSpacing(12); |
| anchor = layout->addAnchor(place, Qt::AnchorBottom, layout, Qt::AnchorBottom); |
| anchor->setSpacing(12); |
| |
| anchor = layout->addAnchor(sunnyWeather, Qt::AnchorTop, title, Qt::AnchorTop); |
| anchor = layout->addAnchor(sunnyWeather, Qt::AnchorBottom, layout, Qt::AnchorVerticalCenter); |
| |
| anchor = layout->addAnchor(tabbar, Qt::AnchorTop, title, Qt::AnchorBottom); |
| anchor->setSpacing(5); |
| anchor = layout->addAnchor(details, Qt::AnchorTop, tabbar, Qt::AnchorBottom); |
| anchor->setSpacing(2); |
| anchor = layout->addAnchor(details, Qt::AnchorBottom, layout, Qt::AnchorBottom); |
| anchor->setSpacing(12); |
| |
| // horizontal anchors |
| anchor = layout->addAnchor(layout, Qt::AnchorLeft, title, Qt::AnchorLeft); |
| anchor = layout->addAnchor(title, Qt::AnchorRight, layout, Qt::AnchorRight); |
| |
| anchor = layout->addAnchor(place, Qt::AnchorLeft, layout, Qt::AnchorLeft); |
| anchor->setSpacing(15); |
| anchor = layout->addAnchor(place, Qt::AnchorRight, details, Qt::AnchorLeft); |
| anchor->setSpacing(35); |
| |
| anchor = layout->addAnchor(sunnyWeather, Qt::AnchorLeft, place, Qt::AnchorHorizontalCenter); |
| anchor = layout->addAnchor(sunnyWeather, Qt::AnchorRight, layout, Qt::AnchorHorizontalCenter); |
| |
| anchor = layout->addAnchor(tabbar, Qt::AnchorHorizontalCenter, details, Qt::AnchorHorizontalCenter); |
| anchor = layout->addAnchor(details, Qt::AnchorRight, layout, Qt::AnchorRight); |
| |
| // QGV setup |
| scene.addItem(widget); |
| scene.setBackgroundBrush(Qt::white); |
| QGraphicsView *view = new QGraphicsView(&scene); |
| view->show(); |
| |
| return app.exec(); |
| } |
| |
| #include "main.moc" |