TnbIconDrawer.h

[詳解]

#pragma once
#include "TnbDrawable.h"
 
 
 
//TNB Library
namespace TNB
{
 
 
 
 
class CIconDrawer : public IDrawable
{
    DEFSUPER(IDrawable);
protected:
    HICON           m_icon;         
    bool            m_canResize;    
    mutable SIZE    m_size;         
public:
 
    CIconDrawer(HICON icon, bool canResize = true) : m_icon(icon), m_canResize(canResize)
    {
        m_size.cx = 0;
        m_size.cy = 0;
    }
 
    virtual IDrawable* Clone(void) const
    {
        CIconDrawer* p = new CIconDrawer(m_icon, m_canResize);
        p->m_size = m_size;
        return p;
    }
 
    virtual bool GetSize(SIZE& _size) const
    {
        if ( m_size.cx == 0 )
        {
            ICONINFO ii;
            if ( ::GetIconInfo(m_icon, &ii) )
            {
                HBITMAP h = ii.hbmColor;
                if ( h == NULL )
                {
                    h = ii.hbmMask;
                }
                BITMAP bm;
                if ( ::GetObject(h, sizeof(BITMAP), &bm) > 0 )
                {
                    m_size.cx = bm.bmWidth;
                    m_size.cy = bm.bmHeight;
                }
                ::DeleteObject(ii.hbmColor);
                ::DeleteObject(ii.hbmMask);
            }
        }
        _size = m_size;
        return m_size.cx != 0;
    }
 
    virtual bool Resize(const SIZE& size)
    {
        if ( m_canResize )
        {
            m_size = size;
            return true;
        }
        return false;
    }
 
    virtual void Draw(HDC dc, int x = 0, int y = 0) const
    {
        SIZE sz;
        GetSize(sz);
        if ( m_canResize )
        {
            ::DrawIconEx(dc, x, y, m_icon, sz.cx, sz.cy, 0, NULL, DI_NORMAL);
        }
        else
        {
            ::DrawIconEx(dc, x, y, m_icon, 0, 0, 0, NULL, DI_NORMAL);
        }
    }
};
 
 
 
};