src/layout.cpp - master - SilovAndrey/easel_gui

src/layout.cpp
69 строк2 KB
Andrey HomePC
первая рабочая версия
21 июл 2026, 11:50
21 июл 2026, 11:5038b8d4a
module;
#include <memory>
#include <vector>
#include <thorvg.h>

module Easel.GUI;

namespace easel::gui {

namespace {
class ContainerWidget : public Widget {
public:
    ContainerWidget(std::vector<std::unique_ptr<Widget>> &&children,
                    Theme const& theme, bool horizontal)
        : m_children(std::move(children)), m_theme(theme), m_horizontal(horizontal) {}

    void render(tvg::Canvas* canvas) {
        for (auto& child : m_children) child->render(canvas);
    }

    bool on_event(Event const& evt) override
    {
        for (auto it = m_children.rbegin(); it != m_children.rend(); ++it)
            if ((*it)->on_event(evt)) return true;
        return false;
    }

protected:
    void on_resize(rect const& bounds) override
    {
        float pos = m_horizontal ? bounds.left : bounds.top;
        for (auto& child : m_children) {
            float size = m_horizontal
                             ? (child->bounds().width() > 0 ? child->bounds().width() : 80)
                             : (child->bounds().height() > 0 ? child->bounds().height() : 40);

            rect r = m_horizontal
                         ? rect(pos, bounds.top + m_theme.spacing,
                                size, bounds.height() - m_theme.spacing * 2)
                         : rect(bounds.left + m_theme.spacing, pos,
                                bounds.width() - m_theme.spacing * 2, size);

            child->resize(r);
            pos += size + m_theme.spacing;
        }
    }

private:
    std::vector<std::unique_ptr<Widget>> m_children;
    const Theme &m_theme;
    bool m_horizontal;
};
}

std::unique_ptr<Widget> vstack(
    std::vector<std::unique_ptr<Widget>> &&children,
    Theme const& theme)
{
    return std::make_unique<ContainerWidget>(std::move(children), theme, false);
}

std::unique_ptr<Widget> hstack(
    std::vector<std::unique_ptr<Widget>> &&children,
    Theme const& theme)
{
    return std::make_unique<ContainerWidget>(std::move(children), theme, true);
}

} // namespace easel::gui