#ifndef __UIHEADICON_H__
#define __UIHEADICON_H__

/*
名称：圆形头像控件（派生CButtonUI类）
*/

class CHeadUI: public CButtonUI
{
public:

CHeadUI();

LPCTSTR GetClass() const;
LPVOID GetInterface(LPCTSTR pstrName);

void SetAttribute(LPCTSTR pstrName, LPCTSTR pstrValue);

void PaintBkImage(HDC hDC);

void SetBkImage(LPCTSTR pStrImage);

void SetDefaultBkImage(LPCTSTR pStrImage){ m_sDefaultBkImage = pStrImage; }
CDuiString GetDefaultBkImage(){ return m_sDefaultBkImage; }
void SetAutoPenColor(bool bAuto){ m_bAutoPenColor = bAuto; }
bool IsAutoPenColor() { return m_bAutoPenColor; }
void SetPenColor(DWORD dwColor){ m_dwPenColor = dwColor; }
DWORD GetPenColor(HDC hDC);
void SetPenWidth(int nPenWidth){ m_nPenWidth = nPenWidth; }
int GetPenWidth(){ return m_nPenWidth; }

bool IsHeadImageExist(LPCTSTR pStrImage);

private:

CDuiString m_sDefaultBkImage;
bool m_bAutoPenColor;
DWORD m_dwPenColor;
int m_nPenWidth;
};

#endif // __UIHEADICON_H__

#include "StdAfx.h"
#include "UIHeadIcon.h"

CHeadUI::CHeadUI()
{
m_sDefaultBkImage = _T("Head\\100_1.png");
m_bAutoPenColor = false;
m_dwPenColor = Color(255, 255, 255, 255).GetValue();
m_nPenWidth = 2;
}

LPCTSTR CHeadUI::GetClass() const
{
return _T("HeadIconUI");
}

LPVOID CHeadUI::GetInterface(LPCTSTR pstrName)
{
if( _tcscmp(pstrName, _T("HeadIcon")) == 0 ) return static_cast<CHeadUI*>(this);
return CControlUI::GetInterface(pstrName);
}

void CHeadUI::SetAttribute(LPCTSTR pstrName, LPCTSTR pstrValue)
{
if (_tcscmp(pstrName, _T("defaultbkimage")) == 0) SetDefaultBkImage(pstrValue);
else if (_tcscmp(pstrName, _T("bkimage")) == 0) SetBkImage(pstrValue);
else if (_tcscmp(pstrName, _T("pencolor")) == 0) {
while (*pstrValue > _T('\0') && *pstrValue <= _T(' ')) pstrValue = ::CharNext(pstrValue);
if (*pstrValue == _T('#')) pstrValue = ::CharNext(pstrValue);
LPTSTR pstr = NULL;
DWORD clrColor = _tcstoul(pstrValue, &pstr, 16);
SetPenColor(clrColor);
}
else if (_tcscmp(pstrName, _T("autopencolor")) == 0) SetAutoPenColor(_tcscmp(pstrValue, _T("true")) == 0);
else if (_tcscmp(pstrName, _T("penwidth")) == 0) SetPenWidth(_ttoi(pstrValue));
else return CButtonUI::SetAttribute(pstrName, pstrValue);
}

void CHeadUI::SetBkImage(LPCTSTR pStrImage)
{
if (IsHeadImageExist(pStrImage))
{
m_sBkImage = pStrImage;
}
else
{
TCHAR tszModule[MAX_PATH + 1] = { 0 };
::GetModuleFileName(CPaintManagerUI::GetInstance(), tszModule, MAX_PATH);
CDuiString sInstancePath = tszModule;
int pos = sInstancePath.ReverseFind(_T('\\'));
if (pos >= 0) sInstancePath = sInstancePath.Left(pos + 1);
sInstancePath.Append(pStrImage);

if (IsHeadImageExist(sInstancePath))
{
m_sBkImage = sInstancePath;
}
else
{
m_sBkImage = pStrImage;
}
}

Invalidate();
}

void CHeadUI::PaintBkImage(HDC hDC)
{
//坐标
POINT pt = { m_rcItem.left, m_rcItem.top };

//大小
SIZE sz = { m_rcItem.right - m_rcItem.left, m_rcItem.bottom - m_rcItem.top };

Graphics graphics(hDC);
if (graphics.GetLastStatus() != Ok)
return;

//消除锯齿
graphics.SetSmoothingMode(SmoothingModeHighQuality);

GraphicsPath graphicspath;
if (graphicspath.GetLastStatus() != Ok)
return;

graphicspath.AddEllipse(pt.x, pt.y, sz.cx, sz.cy);

//设置裁剪圆
graphics.SetClip(&graphicspath, CombineModeReplace);

Image image(GetBkImage());
if (image.GetLastStatus() != Ok)
return;

//绘制图像
graphics.DrawImage(&image, pt.x, pt.y, sz.cx, sz.cy);

//绘制一个1像素宽度的圆形，用于消除锯齿
Pen myPen(GetPenColor(hDC), GetPenWidth());
if (myPen.GetLastStatus() != Ok)
return;

graphics.DrawEllipse(&myPen, pt.x, pt.y, sz.cx, sz.cy);
}

DWORD CHeadUI::GetPenColor(HDC hDC)
{
if (IsAutoPenColor())
{
//像素值颜色取点（ pt.x + 1, pt.y + 1）的值
RECT rc = GetPos();
COLORREF color = GetPixel(hDC, rc.left + 1, rc.top + 1);

BYTE r = GetRValue(color);
BYTE g = GetGValue(color);
BYTE b = GetBValue(color);

return Color(255, r, g, b).GetValue();
}

return m_dwPenColor;
}

bool CHeadUI::IsHeadImageExist(LPCTSTR pStrImage)
{
return GetFileAttributes(pStrImage) == -1 ? false : true;
}

<HeadIcon name="photo" bkimage="photo.png" autopencolor="true" float="true" pos="260,10,0,0" width="70" height="60"/>

CControlUI* CLoginWnd::CreateControl( LPCTSTR pstrClassName )
{
if (_tcsicmp(pstrClassName, _T("HeadIcon")) == 0)
{
return new CHeadUI;
}
return NULL;
}