进度条显示百分比，进度条为什么不动？

[qq_39944892]

PAINTSTRUCT ps;
		CDC* pDC=BeginPaint(&ps);
		int nPos=m_Pro.GetPos();
		CString csPos;
		csPos.Format("%d%%",nPos);
		CRect clientRC;
		GetClientRect(clientRC);
		CSize sztext=pDC->GetTextExtent(csPos);
		int nX=(clientRC.Width()-sztext.cx)/2;
		int nY=(clientRC.Height()-sztext.cy)/2;
		//pDC->SetBkMode(TRANSPARENT);
		int nMin,nMax;
		m_Pro.GetRange(nMin,nMax);
		double dFraction=(double)clientRC.Width()/(nMax-nMin);
		int nLeft=nPos * dFraction;
		CRect leftRC=clientRC;
		leftRC.left=nLeft;
		CRect rightRC=clientRC;
		rightRC.left=nLeft;
		//pDC->FillRect(leftRC,&CBrush(m_Pro));
		pDC->FillRect(leftRC,&CBrush(m_crBlank));
		pDC->SetTextColor(m_crText);
		pDC->TextOut(nX,nY,csPos);
		ReleaseDC(pDC);
		EndPaint(&ps);

[向立天]

//pDC->FillRect(leftRC,&CBrush(m_Pro)); 取消这一句的注释再试试

[schlafenhamster]

m_Pro 是进度条 ？pDC 是不是 进度条的 ？

[schlafenhamster]

就是说 你这个 paint 是不是 进度条的 paint

[qq_39944892]

pDC->FillRect(leftRC,&CBrush(m_Pro)); 1 pDC 是不是 m_Pro.GetDC(); ?不是 2 leftRC 是 进度条 的 左边 ？应该是客户区域 3 ,&CBrush(m_Pro) ？？？ CBrush::CBrush CBrush( ); CBrush( COLORREF crColor ); throw( CResourceException ); CBrush( int nIndex, COLORREF crColor ); throw( CResourceException ); CBrush( CBitmap* pBitmap ); throw( CResourceException ); 没有 CBrush(m_Pro) ！应该是CBrush(m_crProgress);COLORREF m_crProgress; //进度颜色

[schlafenhamster]

要在 进度条的 OnPaint、 中 自绘 ！

[qq_39944892]

m_Pro是进度条的变量

[qq_39944892]

pDC->FillRect(leftRC,&CBrush(m_Pro));这句中的m_Pro应该是m_crProgreess当前进度的颜色

[schlafenhamster]

pDC->FillRect(leftRC,&CBrush(m_Pro)); 1 pDC 是不是 m_Pro.GetDC(); ? 2 leftRC 是 进度条 的 左边 ？ 3 ,&CBrush(m_Pro) ？？？ CBrush::CBrush CBrush( ); CBrush( COLORREF crColor ); throw( CResourceException ); CBrush( int nIndex, COLORREF crColor ); throw( CResourceException ); CBrush( CBitmap* pBitmap ); throw( CResourceException ); 没有 CBrush(m_Pro) ！

[schlafenhamster]

win32 的 做法 1 创建 HWND CreateProgress(HINSTANCE hInstance, HWND hwndParent) {// progressbar HWND hProgress=0; hProgress= CreateWindow(PROGRESS_CLASS/* "msctls_progress32" */, NULL, WS_VISIBLE | WS_CHILD | WS_TABSTOP | PBS_SMOOTH, 10, 40, 160, 30, hwndParent, (HMENU)IDC_PROGRESS, hInstance, NULL); // SendMessage(hProgress,PBM_SETRANGE,0,MAKELPARAM(0,100)); SendMessage(hProgress,PBM_SETSTEP,1,0); SetTimer(hProgress,1,200,NULL); // return hProgress; } 2. WndProc 中 子类化（派生） case WM_CREATE: { m_hProgress=CreateProgress((HINSTANCE) GetWindowLong(hwnd, GWL_HINSTANCE), hwnd); WNDPROC PbOldProc = (WNDPROC)SetWindowLong(m_hProgress, GWL_WNDPROC, (LONG)PBProc); SetProp(m_hProgress,// handle of window "PbOldProc", // atom or address of string PbOldProc); 3 新的滚动条

// ProgressBar
LRESULT CALLBACK PBProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
	PAINTSTRUCT ps;
	HDC hdc;
	int nPos;
	RECT clientRC;
	RECT leftRC;
	double dFraction;
	int nLeft;
	HBRUSH br;
	char prompt[40];
	SIZE sz;
// get oldproc
	WNDPROC OldPbProc=(WNDPROC)GetProp(hWnd,"PbOldProc");
	sprintf(prompt,"PBProc:%d\n",Msg);// case WM_NOTIFY=4E
	OutputDebugString(prompt);
//
	switch(Msg)
	{
	case WM_PAINT:
		hdc=BeginPaint(hWnd,&ps);
		nPos=SendMessage(hWnd,PBM_GETPOS,0,0);
		GetClientRect(hWnd,&clientRC);
		FillRect(hdc,&clientRC,(HBRUSH)GetStockObject(LTGRAY_BRUSH));
		dFraction=(double)(clientRC.right)/(100);
		nLeft=(int) (nPos * dFraction);
		leftRC=clientRC;
		leftRC.right=nLeft;
		leftRC.top+=18;
		br=CreateSolidBrush(RGB(255,0,0));
		FillRect(hdc,&leftRC,br);
		sprintf(prompt,"%d%%",nPos);
		GetTextExtentPoint32(hdc,prompt,strlen(prompt),&sz);
		SetTextColor(hdc,RGB(0,0,0));
		SetBkMode(hdc,TRANSPARENT);
		TextOut(hdc,(int)(nLeft*(clientRC.right-sz.cx)/(double)clientRC.right),0,prompt,strlen(prompt));
		EndPaint(hWnd,&ps);
		return 1;
        case WM_TIMER:
            SendMessage(hWnd,PBM_STEPIT,0,0);
		return 1;
	}
	return CallWindowProc(OldPbProc, hWnd, Msg, wParam, lParam);
}

[qq_39944892]

是放到OnPaint中的

[zgl7903]

1 建议从CProgressCtrl 派生新类， 处理 WM_PAINT 消息 2 不能阻塞消息环，长时操作放到后台进程中