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Context Menu

A right click menu that can attach to any Qt widget.

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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* target = new Card(host);
    target->setFixedSize(300, 180);
    auto* text = new QLabel("Right click here", target);
    text->setAlignment(Qt::AlignCenter);
    target->content().addWidget(text);
    auto* menu = new ContextMenu(target);
    menu->addItem("Back");
    menu->addItem("Forward");
    menu->addItem("Reload");
    menu->attach(*target);
    layout->addWidget(target);
    return canvas;
}

Installation​

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

Usage​

#include <shadcn/navigation.hpp>

shadcn::ContextMenu menu(parent);
menu.addItem("Copy", [] { /* copy selection */ });
menu.addSeparatorLine();
menu.attach(*target);

API​

attach installs an event filter. popupAt opens the menu at a global position and detach removes the filter.

Variations​

Use the inherited item, check item, radio item, label and submenu helpers.

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.