toolbar_widget.hpp

// Copyright Take Vos 2020.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "widget.hpp"
#include "../flow_layout.hpp"
#include "../alignment.hpp"
#include <memory>
#include <ranges>
 
namespace tt {
 
class toolbar_widget final : public widget {
public:
    using super = widget;
 
    toolbar_widget(gui_window &window, widget *parent) noexcept;
 
    template<typename Widget, horizontal_alignment Alignment = horizontal_alignment::left, typename... Args>
    Widget &make_widget(Args &&...args)
    {
        auto widget = std::make_unique<Widget>(window, this, std::forward<Args>(args)...);
        widget->init();
        return static_cast<Widget &>(add_widget(Alignment, std::move(widget)));
    }
 
    [[nodiscard]] float margin() const noexcept override;
    [[nodiscard]] bool constrain(utc_nanoseconds display_time_point, bool need_reconstrain) noexcept;
    void layout(utc_nanoseconds display_time_point, bool need_layout) noexcept override;
    void draw(draw_context context, utc_nanoseconds display_time_point) noexcept override;
    hitbox hitbox_test(point2 position) const noexcept override;
private:
    std::vector<widget *> _left_children;
    std::vector<widget *> _right_children;
    flow_layout _layout;
 
    void update_constraints_for_child(widget const &child, ssize_t index, float &shared_height) noexcept;
 
    void update_layout_for_child(widget &child, ssize_t index) const noexcept;
 
    widget &add_widget(horizontal_alignment alignment, std::unique_ptr<widget> widget) noexcept;
};
 
} // namespace tt