main.cpp Example File

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#include <QApplication> #include <QLabel> #include <QPainter> #include <QPushButton> #include <QGraphicsAnchorLayout> #include <QGraphicsProxyWidget> #include <QGraphicsScene> #include <QGraphicsSceneResizeEvent> #include <QGraphicsView> #include <QGraphicsWidget> 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); setGraphicsItem(original); original->show(); r = QRectF(QPointF(0, 0), pix.size()); } ~PixmapWidget() { setGraphicsItem(0); 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 { QPointF reflection = QPointF(); reflection.setY(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(0, 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"

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