Duilib实现圆形头像控件

.h文件

 #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__

.cpp文件

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

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

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

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

 void CHeadUI::SetAttribute(LPCTSTR pstrName, LPCTSTR pstrValue)
 {
     if (_tcscmp(pstrName, _T("defaultbkimage")) == ) SetDefaultBkImage(pstrValue);
     else if (_tcscmp(pstrName, _T("bkimage")) == ) SetBkImage(pstrValue);
     else if (_tcscmp(pstrName, _T("pencolor")) == ) {
         while (*pstrValue > _T('\0') && *pstrValue <= _T(' ')) pstrValue = ::CharNext(pstrValue);
         if (*pstrValue == _T('#')) pstrValue = ::CharNext(pstrValue);
         LPTSTR pstr = NULL;
         DWORD clrColor = _tcstoul(pstrValue, &pstr, );
         SetPenColor(clrColor);
     }
     else if (_tcscmp(pstrName, _T("autopencolor")) == ) SetAutoPenColor(_tcscmp(pstrValue, _T("true")) == );
     else if (_tcscmp(pstrName, _T("penwidth")) == ) 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 + ] = {  };
         ::GetModuleFileName(CPaintManagerUI::GetInstance(), tszModule, MAX_PATH);
         CDuiString sInstancePath = tszModule;
         int pos = sInstancePath.ReverseFind(_T('\\'));
         if (pos >= ) sInstancePath = sInstancePath.Left(pos + );
         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 + , rc.top + );

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

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

     return m_dwPenColor;
 }

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

xml里这样定义:

<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")) == )
     {
         return new CHeadUI;
     }
     return NULL;
 }

运行效果图:

demo：

Duilib圆形头像控件