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Accordion

A grouped disclosure control with keyboard focus and animated content.

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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* accordion = new Accordion(host);
    accordion->setFixedWidth(400);
    auto& first = accordion->addItem("Is it accessible?");
    auto* answer = new QLabel("Use the arrow keys to move between sections.", &first);
    answer->setWordWrap(true);
    first.content().addWidget(answer);
    first.setExpanded(true);
    accordion->addItem("Is it styled?").content().addWidget(new QLabel("The theme follows shadcn/ui."));
    accordion->addItem("Is it animated?").content().addWidget(new QLabel("Motion respects your application settings."));
    layout->addWidget(accordion);
    return canvas;
}

Installation​

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

Usage​

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

shadcn::Accordion accordion(parent);
auto& item = accordion.addItem("Advanced settings");
item.setContentWidget(new QLabel("Additional options", &item));
item.setExpanded(true);

API​

addItem returns a borrowed AccordionItem reference. Set setAllowsMultiple(true) when more than one item may stay open.

Variations​

Use setExpandedTitles to restore a saved selection. Each item exposes its trigger and content layouts.

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.