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Carousel

A page carousel with keyboard arrows, previous and next controls.

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Live C++Source and licences
#include <QApplication>
#include <QFile>
#include <QHBoxLayout>
#include <QLabel>
#include <QPainter>
#include <QStandardItemModel>
#include <QUrl>
#include <QVBoxLayout>
#include <array>
#ifdef SHADCN_GALLERY_MEDIA
#include <shadcn/media.hpp>
#endif
#include <shadcn/shadcn.hpp>

QWidget* example(QWidget* parent = nullptr) {
    using namespace shadcn;
    auto* canvas = new QWidget(parent);
    canvas->setAutoFillBackground(true);
    auto* outer = new QHBoxLayout(canvas);
    outer->setContentsMargins(32, 32, 32, 32);
    auto* host = new QWidget(canvas);
    auto* layout = new QVBoxLayout(host);
    layout->setContentsMargins(0, 0, 0, 0);
    layout->setSpacing(16);
    outer->addStretch();
    outer->addWidget(host, 0, Qt::AlignCenter);
    outer->addStretch();
    auto* carousel = new Carousel(Qt::Horizontal, host);
    carousel->setFixedSize(350, 210);
    for (int i = 1; i <= 5; ++i) {
        auto* card = new Card(carousel);
        auto* number = new Label(QString::number(i), card);
        auto font = number->font(); font.setPixelSize(30); number->setFont(font);
        number->setAlignment(Qt::AlignCenter);
        card->content().addWidget(number);
        carousel->addSlide(*card);
    }
    layout->addWidget(carousel);
    return canvas;
}

Installation​

add_subdirectory(shadcn-cpp)
target_link_libraries(app PRIVATE shadcn::widgets)

Usage​

#include <shadcn/navigation.hpp>
#include <QLabel>

shadcn::Carousel carousel(parent);
carousel.addSlide(*new QLabel("First", &carousel));
carousel.addSlide(*new QLabel("Second", &carousel));
carousel.setCurrentIndex(0);

API​

addSlide installs a child page. setCurrentIndex selects it, and currentChanged reports the index.

Variations​

Set horizontal or vertical orientation. Use scrollPrevious and scrollNext from application actions.

Keyboard and accessibility​

Qt supplies native focus, keyboard interaction and accessible object roles. Give the component a visible label or an accessible name when its text alone does not explain the action.

Ownership​

The parent widget owns the component. Child widgets created through a component layout follow Qt parent ownership. References returned by helper methods are borrowed.