#include "ScrollContainer.hpp"
#include "Styles.hpp"
#include <iostream>
#include <memory>

namespace Raven {

void ScrollContainer::on_layout() {
    if (!m_target)
        return;

    m_target->rect().set_x(-m_scroll.x());
    m_target->rect().set_y(-m_scroll.y());
    // todo: doesn't work with horizontal scrolling
    m_target->rect().set_min_width(rect().width());
    m_target->rect().set_max_width(rect().width());
}

std::shared_ptr<Widget> ScrollContainer::make_target() {
    m_target = add<Raven::Widget>();
    m_target->set_style(style());
    m_target->rect().update();

    return m_target;
}

void ScrollContainer::on_mouse_button(MouseButtonEvent &event) {
    if (event.did_scroll_down()) {
        set_scroll(Point(m_scroll.x(), m_scroll.y() + m_scroll_step));
    } else if (event.did_scroll_up()) {
        set_scroll(Point(m_scroll.x(), m_scroll.y() - m_scroll_step));
    }
}

}