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  • [WTL] 带阴影的类

    带阴影的类 CShadowWnd 类的头文件及其实现文件的全部细节。
    //头文件:
    if !defined(AFX_SHADOWWND_H__B971A958_59CC_11D2_AC8F_0060084237F6__INCLUDED_)
    #define AFX_SHADOWWND_H__B971A958_59CC_11D2_AC8F_0060084237F6__INCLUDED_
    #if _MSC_VER >= 1000
    #pragma once
    #endif // _MSC_VER >= 1000
    // ShadowWnd.h : header file
    /////////////////////////////////////////////////////////////////////////////
    // CShadowWnd window
    class CShadowWnd : public CWnd
    {
      //Construction
      public:
      CShadowWnd();
      //Attributes
      public:
      //Operations
      public:
      //Overrides
      //ClassWizard generated virtual function overrides
      //{{AFX_VIRTUAL(CShadowWnd)
      public:
        virtual BOOL Create(const RECT& rect, CWnd* pParentWnd);
      //}}AFX_VIRTUAL
      //Implementation
      public:
        CString m_sShowText;
        void ShowReadOnlyText(CString sText);
        CBrush m_bmpBrush;
        virtual ~CShadowWnd();
      //Generated message map functions
      protected:
      //{{AFX_MSG(CShadowWnd)
        afx_msg void OnNcPaint();
        afx_msg void OnPaint();
        afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
      //}}AFX_MSG
      DECLARE_MESSAGE_MAP()
    };
    ///////////////////////////////////////////////////////////////////////////
    //{{AFX_INSERT_LOCATION}}
    //Microsoft Developer Studio will insert additional declarations immediately
    efore the previous line.
    #endif
    / !defined(AFX_SHADOWWND_H__B971A958_59CC_11D2_AC8F_0060084237F6__INCLUDED_)
    //实现文件
    }
    // ShadowWnd.cpp : implementation file
    //
    #include "stdafx.h"
    #include "Shadow.h"
    #include "ShadowWnd.h"
    #ifdef _DEBUG
    #define new DEBUG_NEW
    #undef THIS_FILE
    static char THIS_FILE[] = __FILE__;
    #endif
    //定义常数
    static int aPattern[]={0xAA,0x55,0xAA,0x55,0xAA,0x55,0xAA,0x55};//阴影位图数组
    #define SPOPUP_SHADOWWIDTH 10 //阴影宽度
    #define SPOPUP_SHADOWHEIGHT 13 //阴影高度
    #define MAXWIDTH 400 //显示字符矩形的最大宽度
    /////////////////////////////////////////////////////////////////////////////
    // CshadowWnd
    CShadowWnd::CShadowWnd()
    {
    CBitmap bmp;
      bmp.CreateBitmap(8,8,1,1,(void* )aPattern);//创建一个阴影位图
      m_bmpBrush.CreatePatternBrush(&bmp); //创建一把阴影刷
    }
    CShadowWnd::~CShadowWnd()
    {
    }
    BEGIN_MESSAGE_MAP(CShadowWnd, CWnd)
    //{{AFX_MSG_MAP(CShadowWnd)
    ON_WM_NCPAINT()
    ON_WM_PAINT()
    ON_WM_CREATE()
    //}}AFX_MSG_MAP
    END_MESSAGE_MAP()
    /////////////////////////////////////////////////////////////////////////////
    // CShadowWnd message handlers
    BOOL CShadowWnd::Create(const RECT& rect, CWnd* pParentWnd)
    {
    // TODO: Add your specialized code here and/or call the base class
      const char* pClassName=AfxRegisterWndClass(CS_HREDRAW|CS_VREDRAW);
    return CWnd::CreateEx(WS_EX_STATICEDGE,pClassName, "Shadow window", WS_POPUP,
    rect.left,rect.top,rect.right,rect.bottom, pParentWnd->GetSafeHwnd(),0,NULL);
    }
    void CShadowWnd::OnNcPaint()
    {
    // TODO: Add your message handler code here
      CWindowDC dc(this);
      CRect rc;
      GetWindowRect(&rc);
      rc.right-=rc.left;//width
      rc.bottom-=rc.top;//height
      rc.top=0;
      rc.left=0;
      m_bmpBrush.UnrealizeObject();
      CBrush* OldBrush=dc.SelectObject(&m_bmpBrush);
    //画底部阴影
    dc.PatBlt(rc.left+SPOPUP_SHADOWWIDTH,rc.bottom-SPOPUP_SHADOWHEIGHT, rc.right-
        SPOPUP_SHADOWWIDTH,SPOPUP_SHADOWHEIGHT,PATCOPY);
    //画右边阴影
    dc.PatBlt(rc.right-SPOPUP_SHADOWWIDTH,rc.top+SPOPUP_SHADOWHEIGHT, SPOPUP_SHADOWWIDTH,
        rc.bottom,PATCOPY);
    dc.SelectObject(OldBrush); //restore old brush
      CBrush* pBrush=CBrush::FromHandle(GetSysColorBrush(COLOR_WINDOWFRAME));
      rc.right-=SPOPUP_SHADOWWIDTH;
      rc.bottom-=SPOPUP_SHADOWHEIGHT;
      dc.FrameRect(rc,pBrush);//画边框
    // Do not call CWnd::OnNcPaint() for painting messages
    }
    void CShadowWnd::OnPaint()
    {
      CPaintDC dc(this); // device context for painting
      // TODO: Add your message handler code here
      CRect rect;
      GetClientRect(&rect);
      rect.left+=5;
      rect.top+=5;
      rect.right-=SPOPUP_SHADOWWIDTH;
      rect.bottom-=SPOPUP_SHADOWHEIGHT;
      dc.SetTextColor(RGB(0,0,255));//设置显示文本颜色
      dc.DrawText(m_sShowText,rect,DT_WORDBREAK|DT_NOPREFIX);
    // Do not call CWnd::OnPaint() for painting messages
    }
    void CShadowWnd::ShowReadOnlyText(CString sText)
    {
    m_sShowText=sText; //存入显示字符串
      CDC dc;
      dc.CreateDC("DISPLAY",NULL,NULL,NULL); //创建一个显示设备描述表
      dc.SelectObject(GetStockObject(SYSTEM_FONT)); //选择字体到设备描述表
      CRect rect(0,0,MAXWIDTH,0);
    //获得待显示的字符串 sText 的实际高度和宽度
      dc.DrawText(sText,rect,DT_WORDBREAK|DT_CENTER|DT_CALCRECT|DT_NOPREFIX);
    //为矩形留些余量
      rect.right+=3*SPOPUP_SHADOWWIDTH;
      rect.bottom+=3*SPOPUP_SHADOWHEIGHT;
      this->Create(rect,0);//创建窗口
      this->ShowWindow(SW_SHOW); //显示窗口
      this->UpdateWindow(); //立刻更新窗口
    //进入消息循环,获取全部消息,控制整个系统
      MSG Msg;
      BOOL bDone;
      SetCapture();
      bDone=FALSE;
      while(!bDone)
      {
        if(PeekMessage(&Msg,NULL,0,0,PM_REMOVE))
          if(Msg.message==WM_KEYDOWN||Msg.message==WM_SYSKEYDOWN||
            Msg.message==WM_LBUTTONDOWN||Msg.message==WM_RBUTTONDOWN)
            bDone=TRUE;
          else
          {
            TranslateMessage(&Msg);
            DispatchMessage(&Msg);
          }
      }
      ReleaseCapture();
      DestroyWindow();
    }
    int CShadowWnd::OnCreate(LPCREATESTRUCT lpCreateStruct)
    {
      if (CWnd::OnCreate(lpCreateStruct) == -1)
        return -1;
      // TODO: Add your specialized creation code here
      CenterWindow();
      return 0;
    }


      使用方法:将该类增加到一个项目文件中;在你欲使用函数的类(一般为视类或框架窗口类)中增加一个成员变量(如:CshadowWnd m_ShadowWnd),当需要使用带阴影的弹出窗口显示信息时,调用成员函数(如:m_ShadowWnd.ShowText(String sText))即可,无须考虑其实现细节。程序在Visual C++ 6.0环境下编译通过。 
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  • 原文地址:https://www.cnblogs.com/huqingyu/p/48007.html
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