TnbFlowLayout.h

[詳解]

#pragma once
#include "TnbSimpleVector.h"
#include "TnbLayout.h"
 
 
 
//TNB Library
namespace TNB
{
 
 
 
class CFlowLayout : public CAbstractLayout
{
    DEFSUPER(CAbstractLayout);
public:
 
    CFlowLayout(void) : m_hLocation(LEFT)
    {
        m_params = new CParamVector();
    }
 
    void SetLineLocation(ELocation hloc = LEFT)
    {
        m_hLocation = hloc;
    }
 
    CFlowLayout& Add(const ILayout& layout, ELocation vloc = DEFAULT)
    {
        m_params->Add(TParam(vloc, DEFAULT, layout));
        return *this;
    }
 
    virtual ILayout* Clone(void) const
    {
        CFlowLayout* P = new CFlowLayout();
        *P = *this;
        return P;
    }
 
    virtual bool GetMinimumSize(SIZE& _size) const
    {
        _size.cx = 0;
        _size.cy = 0;
        loop ( item, m_params->GetSize() )
        {
            TParam& pa = m_params->At(item);
            SIZE sz;
            if ( ! pa.pLayout->GetSize(sz) )
            {
                return false;
            }
            _size.cx = max(_size.cx, sz.cx);
        }
        AddMargnSize(_size);
        return true;
    }
    
    int GetMinimumHeight(size_t width) const
    {
        CSimpleVectorT<POINT> lineNum;  // ライン毎情報。 X がアイテム数、 Y のHIWORDが高さ、LOWORDが幅
        CSimpleVectorT<SIZE> sizes;     // アイテム毎情報。
        int h = m_Calc(lineNum, sizes, width);
        if ( h >= 0 )
        {
            h += m_margn.top + m_margn.bottom;
        }
        return h;
    }
    
    virtual void Decide(int x, int y, WPARAM wParam, LPARAM lParam)
    {
        if ( m_params.IsNull() )
        {
            return;
        }
        // 表示範囲
        int clientWidth = m_layoutSize.cx - m_margn.left - m_margn.right;
        // 全アイテムの大きさを取得
        CSimpleVectorT<POINT> lineNum;  // ライン毎情報。 X がアイテム数、 Y のHIWORDが高さ、LOWORDが幅
        CSimpleVectorT<SIZE> sizes;     // アイテム毎情報。
        if ( m_Calc(lineNum, sizes, clientWidth) < 0 )
        {
            return;
        }
        // ライン毎の処理
        int item = 0;
        int yy = m_margn.top;
        loop ( line, lineNum.GetSize() )
        {
            int hh = LOWORD(lineNum[line].y);
            int xx = (clientWidth - HIWORD(lineNum[line].y));
            switch ( m_hLocation )
            {
            case LEFT:
                xx = 0;
                break;
            case CENTER:
            case DEFAULT:
                if ( xx < 0 ) { xx = 0; }
                xx /= 2;
                break;
            }
            xx += m_margn.left;
            loop ( i, lineNum[line].x )
            {
                TParam& pa = m_params->At(item);
                SIZE& sz = sizes[item];
                HorizontalItemDecide(pa.pLayout, x, xx, sz.cx, LEFT, wParam, lParam);
                VerticalItemDecide(pa.pLayout, y, yy, sz.cy, pa.verticalLocate, wParam, lParam);
                item++;
                xx += sz.cx + m_gapSize.cx;
            }
            yy += m_gapSize.cy + hh;
        }
    }
 
private:
 
    // _lineNum ライン毎情報。 X がアイテム数、 Y のHIWORDが高さ、LOWORDが幅
    // _sizes アイテム毎情報。
    int m_Calc(CSimpleVectorT<POINT>& _lineNum, CSimpleVectorT<SIZE>& _sizes, size_t clientWidth) const
    {
        size_t itemNum = m_params->GetSize();
        _sizes.SetSize(itemNum);
        _lineNum.RemoveAll();
        int height = 0;
        int im = 0;
        int h = 0;
        int w = 0;
        loop ( item, itemNum )
        {
            TParam& pa = m_params->At(item);
            SIZE& sz = _sizes[item];
            if ( ! pa.pLayout->GetSize(sz) )
            {
                return -1;
            }
            if ( im > 0 && w + sz.cx + m_gapSize.cx > ToInt(clientWidth) )
            {
                // 幅を超えた
                POINT p = { im, MAKELONG(h, w) };
                height += h;
                if ( _lineNum.GetSize() != 0 )
                {
                    height += m_gapSize.cy;
                }
                _lineNum.Add(p);
                im = 0;
                h = 0;
                w = 0;
            }
            w += sz.cx;
            if ( im > 0 )
            {
                w += m_gapSize.cx;
            }
            h = max(h, sz.cy);
            im++;
        }
        if ( im > 0 )
        {
            // 幅を超えた
            POINT p = { im, MAKELONG(h, w) };
            height += h;
            if ( _lineNum.GetSize() != 0 )
            {
                height += m_gapSize.cy;
            }
            _lineNum.Add(p);
        }
        return height;
    }
 
    typedef CSimpleVectorT<TParam> CParamVector;    
    CPointerHandleT<CParamVector>   m_params;       
    ELocation                       m_hLocation;    
};
 
 
 
}; // TNB