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Checkbox

A native check control with checked, unchecked and mixed states.

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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* check = new Checkbox("Accept terms and conditions", host);
    check->setChecked(true);
    layout->addWidget(check);
    return canvas;
}

Installation​

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

Usage​

#include <shadcn/widgets.hpp>

shadcn::Checkbox complete("Mark complete", parent);
complete.setTristate(true);
complete.setCheckState(Qt::PartiallyChecked);
complete.setInvalid(false);

Use the inherited toggled, stateChanged or checkStateChanged signals for updates.

API​

setInvalid changes the visual state. The native class keeps Qt's check state, tristate behavior and button signals.

Keyboard and accessibility​

Space toggles the control. The visible text supplies the accessible name. Use the mixed state only when the application needs to represent a partial selection.