gui_scroll_frame.hpp

#ifndef LXGUI_GUI_SCROLL_FRAME_HPP
#define LXGUI_GUI_SCROLL_FRAME_HPP
 
#include "lxgui/gui_frame.hpp"
#include "lxgui/gui_frame_renderer.hpp"
#include "lxgui/lxgui.hpp"
#include "lxgui/utils.hpp"
 
namespace lxgui::gui {
 
class texture;
 
class scroll_frame : public frame, public frame_renderer {
public:
    using base = frame;
 
    explicit scroll_frame(
        utils::control_block& block, manager& mgr, const frame_core_attributes& attr);
 
    ~scroll_frame() override;
 
    void copy_from(const region& obj) override;
 
    bool can_use_script(const std::string& script_name) const override;
 
    void
    fire_script(const std::string& script_name, const event_data& data = event_data{}) override;
 
    void set_scroll_child(utils::owner_ptr<frame> obj);
 
    const utils::observer_ptr<frame>& get_scroll_child() {
        return scroll_child_;
    }
 
    utils::observer_ptr<const frame> get_scroll_child() const {
        return scroll_child_;
    }
 
    void set_horizontal_scroll(float horizontal_scroll);
 
    float get_horizontal_scroll() const;
 
    float get_horizontal_scroll_range() const;
 
    void set_vertical_scroll(float vertical_scroll);
 
    float get_vertical_scroll() const;
 
    float get_vertical_scroll_range() const;
 
    utils::observer_ptr<const frame>
    find_topmost_frame(const std::function<bool(const frame&)>& predicate) const override;
 
    void notify_strata_needs_redraw(strata strata_id) override;
 
    vector2f get_target_dimensions() const override;
 
    void notify_scaling_factor_updated() override;
 
    static void register_on_lua(sol::state& lua);
 
    static constexpr const char* class_name = "ScrollFrame";
 
protected:
    void         parse_all_nodes_before_children_(const layout_node& node) override;
    virtual void parse_scroll_child_node_(const layout_node& node);
 
    void update_(float delta) override;
 
    const std::vector<std::string>& get_type_list_() const override;
 
    void update_scroll_range_();
    void rebuild_scroll_render_target_();
    void render_scroll_strata_list_();
 
    vector2f scroll_;
    vector2f scroll_range_;
 
    utils::observer_ptr<frame> scroll_child_ = nullptr;
    utils::scoped_connection   scroll_child_on_resize_connection_;
 
    bool                           redraw_scroll_render_target_flag_ = false;
    std::shared_ptr<render_target> scroll_render_target_;
 
    utils::observer_ptr<texture> scroll_texture_ = nullptr;
};
 
} // namespace lxgui::gui
 
#endif