Skip to main content

Direction

A layout direction provider for left to right and right to left content.

Loading preview…
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* direction = new DirectionProvider(Direction::RightToLeft, host);
    auto* row = new QHBoxLayout;
    row->addWidget(new Button("First", direction));
    row->addWidget(new Button("Second", direction));
    row->addWidget(new Button("Third", direction));
    direction->content().addLayout(row);
    direction->content().addWidget(new QLabel("Right to left layout", direction));
    layout->addWidget(direction);
    return canvas;
}

Installation​

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

Usage​

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

shadcn::DirectionProvider rtl(
    shadcn::Direction::RightToLeft, parent);
rtl.content().addWidget(
    new QLabel("Arabic text", &rtl));

API​

setDirection changes Qt layout direction and emits directionChanged. content() returns the owned layout.

Variations​

Switch direction at the application or surface boundary.

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.