dl_ui_progress_bar.h

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#pragma once
 
#ifndef DL_DISABLE_RENDER
 
#include "base/dl_string.h"
#include "misc/dl_component_use.h"
#include "base/dl_type_def.h"
#include "math/dl_coor.h"
#include "math/dl_math.h"
#include "math/dl_algorithm.h"
#include "ui/dl_ui_background.h"
#include "ui/dl_ui_text.h"
#include "ui/dl_ui_panel.h"
 
namespace dl::UI
{
class ProgressBar
{
public:
    static ProgressBar* Create(
        UI::Background* bg,
        UI::Background* mid,
        UI::Text* txt = nullptr);
    ProgressBar* Clone();
 
    void Update()
    {
        _panel->Update();
    }
    void Render()
    {
    }
 
    bool IsPickup()
    {
        return _bg->IsPickup();
    }

    void SetSize(const Position& size)
    {
        _bg->SetSize(size);
        _refresh_mid();
        _refresh_text_pos();
    }

    void SetOrder(float order)
    {
        _order = order;
        // 同一组内，越靠近屏幕（负数）越上层：bg < mid < txt
        if (_bg)    _bg->SetOrder(Math::OffsetOrder(order, 0, 0, 0));
        if (_mid) _mid->SetOrder(Math::OffsetOrder(order, 0, 0, -1));
        if (_txt) _txt->SetOrder(Math::OffsetOrder(order, 0, 0, -2));
    }
 
    Coor* GetCoor() { return _panel->GetCoor(); }
    Panel* GetPanel() { return _panel; }
 
    void SetElementData(const Align::Direction2& hv, const Position& pos = {})
    {
        _cptElemData._size = _bg->GetSize();
        _cptElemData._anchor = {};
        _cptElemData._hv = hv;
        _cptElemData._pos = pos;
 
        // 在组内则更新位置
        if (_parent)
            _parent->OnChangeElementData(&_cpt);
    }

    void SetProgress(float progress)
    {
        _progress = dl::clamp(progress, 0.0f, 1.0f);
        _refresh_mid();
        _refresh_text();
    }

    void SetProgressK(float progress_k)
    {
        _progressK = progress_k;
        _refresh_text();
    }

    float GetProgress() const { return _progress; }

    void SetStringFormat(std::string_view fmt)
    {
        _fmt = fmt;
        _refresh_text();
    }

    void SetDir(Align::Dir4 dir);
    Align::Dir4 GetDir() const { return _dir; }

    void SetMidRect(RectF mid_rect)
    {
        _rectMid = mid_rect;
        _refresh_mid();
    }

    RectF GetMidRect() const { return _rectMid; }

    UI::Background* GetBackground() { return _bg; }
    UI::Background* GetMid() { return _mid; }
    UI::Text* GetText() { return _txt; }
 
    Components* GetCpt() { return &_cpt; }
 
    ~ProgressBar();
private:
    ProgressBar() :
        _parent{ nullptr },
        _panel{ nullptr },
        _bg{ nullptr },
        _mid{ nullptr },
        _txt{ nullptr },
        _progress{ 0.0f },
        _progressK{ 100.0f },
        _order{ Z_DEFAULT_UI },
        _dir{ Align::Dir4::RIGHT },
        _rectMid{},
        _sizeMidOrigin{},
        _fmt{ "{:.0f}%" },
        _cpt{ this }
    {
    }
 
    Panel* _parent;        // 父panel（由Panel反填，用于OnChangeElementData刷新位置）
    Panel* _panel;     // 自身panel（子元素挂载于此）
    UI::Background* _bg;
    UI::Background* _mid;
    UI::Text* _txt;
    float _progress;    // 当前进度 [0,1]
    float _progressK;   // 显示系数
    float _order;
    Align::Dir4 _dir;    // 显示方向
    RectF _rectMid;        // mid所在区域（空则以mid原图大小）
    Position _sizeMidOrigin;    // mid原图大小
    std::string _fmt;   // 进度文本格式
 
    Components _cpt;
    Cpt::DeleteThis _cptDeleteThis;
    Cpt::SetOrder _cptSetOrder;
    Cpt::IsPickup _cptIsPickup;
    Cpt::Render _cptRender;
    Cpt::GetCoor _cptGetCoor;
    Cpt::ElementData _cptElemData;
    Cpt::Clone _cptClone;
 
    void _delete_this() { delete this; }
 
    Components* _clone()
    {
        return Clone()->GetCpt();
    }

    void _init_panel();
 
    void _refresh_mid();
    void _refresh_text();
    void _refresh_text_pos();
 
    void _init_cpt()
    {
        _cptDeleteThis = std::bind(&ProgressBar::_delete_this, this);
        _cptSetOrder = std::bind(&ProgressBar::SetOrder, this, std::placeholders::_1);
        _cptIsPickup = std::bind(&ProgressBar::IsPickup, this);
        _cptRender = std::bind(&ProgressBar::Render, this);
        _cptGetCoor = std::bind(&ProgressBar::GetCoor, this);
        _cptClone = std::bind(&ProgressBar::_clone, this);
 
        _cpt.PushBack(&_cptDeleteThis);
        _cpt.PushBack(&_cptSetOrder);
        _cpt.PushBack(&_cptIsPickup);
        _cpt.PushBack(&_cptRender);
        _cpt.PushBack(&_cptGetCoor);
        _cpt.PushBack(&_cptClone);
        _cpt.PushBack(&_parent);
        _cpt.PushBack(&_cptElemData);
    }
};
}
 
#endif