#pragma once
#include <QColor>
#include <QPainter>
#include <QRect>
namespace Psc {
class Base_Scroll_Bar {
public:
    // 距离控件起点的位置
    int start = 0;
    double get_view_pos() {
        return this->_view_pos;
    }
    void set_view_pos(int view_pos) {
        this->_view_pos = view_pos;
    }
    void resize(int bar_len, int view_len, int owner_len) {
        this->_bar_len = bar_len;
        this->view_len = view_len;
        this->owner_len = owner_len;
    }
    bool show = true;
    QColor background_color = Qt::gray;
    QColor slider_color = Qt::black;
protected:
    // 主位置情况
    double owner_len = 1;
    double _view_pos = 0;
    double view_len = 1;
    // 滚动条位置情况
    double _bar_len = 1; // 滚动条长度
public:
    double rate() {
        return _bar_len / owner_len;
    }
    double bar_len() {
        return _bar_len;
    }
    double pos() {
        return _view_pos * _bar_len / owner_len;
    }
    double view_pos() {
        return _view_pos;
    }
    double slider_len() {
        return view_len * _bar_len / owner_len;
    }
};
// 向下
class V_Scroll_Bar : public Base_Scroll_Bar {
public:
    double w = 8;
    void draw(QPainter* painter);
    QRect get_slider_rect(int ww, int hh);
    QRect get_bar_rect(int ww, int hh);
};
// 向下
class H_Scroll_Bar : public Base_Scroll_Bar {
public:
    double h = 8;
    void draw(QPainter* painter);
    QRect get_slider_rect(int ww, int hh);
    QRect get_bar_rect(int ww, int hh);
};
} // namespace Psc