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Collapsible

A single disclosure trigger with animated open and closed 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* section = new Collapsible("3 repositories", host);
    section->setFixedWidth(340);
    for (const auto* text : {"@shadcn/ui", "@shadcn/ui/templates", "@shadcn/ui/blocks"})
        section->content().addWidget(new QLabel(text, section));
    section->setOpen(true);
    layout->addWidget(section);
    return canvas;
}

Installation​

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

Usage​

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

shadcn::Collapsible panel("Details", parent);
panel.setContentWidget(
    *new QLabel("More information", &panel));
panel.setOpen(true);

API​

setOpen and toggle update the state. openChanged reports changes, and content() accepts several child widgets.

Variations​

Use Accordion when several sections belong to one group.

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.