树控件自绘wm_paint消息//只出现GradientFillRect函数效果、树节点的字都没有！

mirroatl139 2012-12-21 04:47:40



 void CTreeCtrlEx::OnPaint() 

{

	CPaintDC dc(this); // device context for painting

	CRect rcClient;

	GetClientRect(rcClient); //获取客户区

	CDC memDC;

	memDC.CreateCompatibleDC(&dc);

	CBitmap bitmap;

	bitmap.CreateCompatibleBitmap(&dc,rcClient.Width(),rcClient.Height());

    CBitmap* pOldBitmap = memDC.SelectObject(&bitmap);

	GradientFillRect(memDC.m_hDC,rcClient,0xFDE7C5,0xffffff,false);

    memDC.SetBkMode(TRANSPARENT);

    memDC.SetTextColor(RGB(0,0,0));

	dc.BitBlt(rcClient.left,rcClient.top,rcClient.Width(),rcClient.Height(),&memDC,rcClient.left,rcClient.top,SRCCOPY);

	memDC.SelectObject(pOldBitmap);

	memDC.DeleteDC();

}

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傻X 2012-12-21

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引用 3 楼 gfm688 的回复:

void CTreeCtrlEx::OnPaint() { CPaintDC dc(this); // device context for painting CRect rcClient; GetClientRect(rcClient); //获取客户区 CDC memDC; memDC.CreateCompatibleDC(&……

这代码不错，但是感觉会闪烁哦。 CWnd::DefWindowProc(WM_PAINT, (WPARAM)memDC.GetSafeHdc(), 0); 这个是不是应用CTreeCtrlEx的父类更好呢？只是感觉。最好放到一个内存中同时输出。

gfm688 2012-12-21

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void CTreeCtrlEx::OnPaint() { CPaintDC dc(this); // device context for painting CRect rcClient; GetClientRect(rcClient); //获取客户区 CDC memDC; memDC.CreateCompatibleDC(&dc); CBitmap bitmap; bitmap.CreateCompatibleBitmap(&dc,rcClient.Width(),rcClient.Height()); CBitmap* pOldBitmap = memDC.SelectObject(&bitmap); CWnd::DefWindowProc(WM_PAINT, (WPARAM)memDC.GetSafeHdc(), 0); GradientFillRect(dc.GetSafeHdc(),rcClient,0xFDE7C5,0xffffff,false); COLORREF cr = GetBkColor(); if (cr == -1) cr = GetSysColor(COLOR_WINDOW); ::TransparentBlt(dc.GetSafeHdc(), 0, 0, rrcClient.Width(), rcClient.Height(), memDC.GetSafeHdc(), 0, 0, rcClient.Width(), rcClient.Height(), cr); memDC.SelectObject(pOldBitmap); }

gfm688 2012-12-21

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void CTreeCtrlEx::OnPaint() 
{
  CPaintDC dc(this); // device context for painting
  CRect rcClient;
  GetClientRect(rcClient); //获取客户区
  CDC memDC;
  memDC.CreateCompatibleDC(&dc);
  CBitmap bitmap;
  bitmap.CreateCompatibleBitmap(&dc,rcClient.Width(),rcClient.Height());
  CBitmap* pOldBitmap = memDC.SelectObject(&bitmap);
  CWnd::DefWindowProc(WM_PAINT, (WPARAM)memDC.GetSafeHdc(), 0);
  GradientFillRect(dc.GetSafeHdc(),rcClient,0xFDE7C5,0xffffff,false);
  ::TransparentBlt(dc.GetSafeHdc(), 0, 0, rrcClient.Width(), rcClient.Height(), memDC.GetSafeHdc(), 0, 0, rcClient.Width(), rcClient.Height(), GetBkColor());
  memDC.SelectObject(pOldBitmap);
}

傻X 2012-12-21