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Resizable

A splitter group with a styled handle and keyboard and pointer resizing.

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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* panels = new ResizablePanelGroup(Qt::Horizontal, host);
    panels->setFixedSize(400, 190);
    for (const auto* text : {"One", "Two", "Three"}) {
        auto* panel = new Card(panels);
        auto* label = new Label(text, panel);
        label->setAlignment(Qt::AlignCenter);
        panel->content().addWidget(label);
        panels->addPanel(*panel);
    }
    panels->setPanelSizes({140, 120, 140});
    layout->addWidget(panels);
    return canvas;
}

Installation​

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

Usage​

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

shadcn::ResizablePanelGroup panels(Qt::Horizontal, parent);
panels.addPanel(*new QLabel("Navigation", &panels));
panels.addPanel(*new QLabel("Content", &panels));
panels.setPanelSizes({240, 720});

API​

addPanel inserts a child. setPanelSizes and panelSizes use Qt splitter sizes. setHandleVisible hides the visual handle.

Variations​

Use a vertical orientation for stacked regions.

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.