WTL 繪制的進(jìn)度條，邏輯清晰明了，代碼函數(shù)清晰易懂：基本思路就是 首先繪制 進(jìn)度條背景圖，然后根據(jù)動(dòng)態(tài)進(jìn)度不斷重繪前景進(jìn)度條，繪制操作在OnPaint函數(shù)里畫。該類可以直接用于項(xiàng)目中。

使用示例：

MyProgress* pMyProgress = new MyProgress;
CRect rcProgress;
rcProgress.top = 500;
rcProgress.left = 240;
rcProgress.right = rcProgress.left + 500;
rcProgress.bottom = rcProgress.top + 20;
CString strFore = Util::GetCurrentDir();
strFore += L"\\img\\ui\\progress_fore.png";
CString strBgnd = Util::GetCurrentDir();
strBgnd += L"\\img\\ui\\progress_bgnd.png";
pMyProgress->SetRange(0,100);
pMyProgress->SetProgressBmp(strFore,strBgnd);
pMyProgress->Create(m_hWnd,rcProgress,NULL,WS_CHILD|WS_VISIBLE);

效果圖如下：

進(jìn)度條自定義類代碼如下：

#pragma once#pragma comment(lib, "gdiplus.lib") static ULONG_PTR s_gdiplusToken3=0;class MyProgress:public CWindowImpl<MyProgress> { public:MyProgress(){GdiplusStartupInput gdiplusStartupInput;GdiplusStartup(&s_gdiplusToken3, &gdiplusStartupInput, NULL);}~MyProgress(){GdiplusShutdown(s_gdiplusToken3);}protected:BEGIN_MSG_MAP(MyProgress)MESSAGE_HANDLER(WM_CREATE,OnCreate)MESSAGE_HANDLER(WM_PAINT,OnPaint)MESSAGE_HANDLER(WM_DESTROY,OnDestroy)MESSAGE_HANDLER(WM_ERASEBKGND,OnEraseBkgnd)END_MSG_MAP()HBITMAP GetBitmapFromFile( LPCWSTR pFile ){std::auto_ptr<Bitmap> pBmp(new Bitmap(pFile));if(!pBmp.get())return NULL;HBITMAP hBmp = NULL;Color backColor = Color(255,0,0,0); if(Ok!=pBmp->GetHBITMAP(backColor,&hBmp))return NULL;return hBmp;}void SetProgressBmp(CString strFore,CString strBgnd){m_btm_fore.Attach(GetBitmapFromFile(strFore));m_btm_bgnd.Attach(GetBitmapFromFile(strBgnd));}BOOL DrawBmp( HDC hdc, CRect rect, HBITMAP hBitmap ){BITMAP bm;GetObject(hBitmap,sizeof(bm),(VOID*)&bm);INT nWidth = bm.bmWidth;INT nHeight = bm.bmHeight;CDC memdc;memdc.CreateCompatibleDC(hdc);CBitmap bitmap;bitmap.CreateCompatibleBitmap(hdc,nWidth,nHeight);memdc.SelectBitmap(hBitmap);//BLENDFUNCTION bf = {AC_SRC_OVER,0,255,1};//return ::AlphaBlend(hdc,rect.left,rect.top,nWidth,nHeight,memdc,0,0,nWidth,nHeight,bf);return ::StretchBlt(hdc,rect.left,rect.top,rect.right-rect.left,rect.bottom-rect.top,memdc,0,0,nWidth,nHeight,SRCCOPY );}void SetPos(int nPos){m_nPos = nPos;m_nPercent = GetPercent();RedrawWindow();}void SetRange(int nMin,int nMax){if(nMin > nMin)return;m_nMin = nMin;m_nMax = nMax;}int GetRange(){return m_nMax - m_nMin;}int GetPercent(){return (m_nPos * 100)/GetRange();}LRESULT OnCreate(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/){m_nMin = 0;m_nMax = 100;m_nPos = 0;m_nPercent =0;m_bHasDrawBgnd = FALSE;GetClientRect(&m_rcWindow);GetClientRect(&m_rcProgress);SetWindowPos(HWND_TOPMOST,m_rcWindow,SWP_SHOWWINDOW);return TRUE;}LRESULT OnDestroy(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/){return TRUE;}LRESULT OnEraseBkgnd(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/){return TRUE;}LRESULT OnPaint(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/){CPaintDC dc(m_hWnd);int nWidth = m_rcWindow.right - m_rcWindow.left;int nHeight = m_rcWindow.bottom - m_rcWindow.top;if(!m_bHasDrawBgnd){//畫背景DrawBmp(dc,m_rcWindow,m_btm_bgnd);m_bHasDrawBgnd = TRUE;}//畫動(dòng)態(tài)進(jìn)度條部分m_rcProgress.right = m_rcProgress.left + nWidth*GetPercent()/100;DrawBmp(dc,m_rcProgress,m_btm_fore);return TRUE;} private:int m_nMin;int m_nMax;int m_nPos;int m_nPercent;BOOL m_bHasDrawBgnd;CBitmap m_btm_fore;CBitmap m_btm_bgnd;CRect m_rcWindow;CRect m_rcProgress; };

　　

轉(zhuǎn)載于:https://www.cnblogs.com/JczmDeveloper/p/3498296.html

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