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Slider

A keyboard and pointer controlled single value or range slider.

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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* slider = new Slider(host);
    slider->setFixedWidth(320);
    slider->setValues({25, 75});
    slider->setAccessibleName("Price range");
    layout->addWidget(slider);
    return canvas;
}

Installation​

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

Usage​

#include <shadcn/controls.hpp>

shadcn::Slider slider(0, 100, parent);
slider.setValues({20, 80});
slider.setSingleStep(5);
QObject::connect(&slider, &shadcn::Slider::valuesChanged,
                 receiver, onValuesChanged);

API​

setRange sets the bounds and setValues accepts one or more thumbs. valuesChanged reports current values. Dragging a thumb past its neighbours pushes them in the same direction. Keyboard and accessibility value changes stop at the adjacent thumb, matching the stock Base UI behavior.

Variations​

Pass one value for a single thumb and set vertical orientation for a column layout.

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.