CListCtrl 中添加控制进度条 (2)

最新推荐文章于 2015-06-30 16:10:00 发布

zw0558

最新推荐文章于 2015-06-30 16:10:00 发布

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文章标签： listview null

本文链接：https://blog.youkuaiyun.com/zw0558/article/details/5879406

版权

本文介绍了一种使用自定义绘制(CustomDraw)消息来改变列表视图(ListView)项显示效果的方法，通过调整颜色和绘制方式，实现了百分比类型的项特殊高亮显示的功能。

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1。添加变量

COLORREF m_clrText;
COLORREF m_clrBkgnd;
COLORREF m_clrHText;
COLORREF m_clrHBkgnd;
COLORREF m_clrPercent;
COLORREF m_clrHPercent;

构造函数中初始化

m_clrText = ::GetSysColor(COLOR_WINDOWTEXT);
m_clrBkgnd = ::GetSysColor(COLOR_WINDOW);
m_clrHText = ::GetSysColor(COLOR_HIGHLIGHTTEXT);
m_clrHBkgnd = ::GetSysColor(COLOR_HIGHLIGHT);
m_clrPercent = ::GetSysColor(COLOR_HIGHLIGHT);
m_clrPercent=RGB(0,255,0);
m_clrHPercent = ::GetSysColor(COLOR_BTNFACE);
// m_clrHPercent = RGB(255,0,0);

2.添加消息函数

消息：ON_NOTIFY_REFLECT(NM_CUSTOMDRAW, OnCustomDraw)

函数：

OnCustomDraw(NMHDR* pNMHDR, LRESULT* pResult)

{

LPNMLVCUSTOMDRAW lplvcd = (LPNMLVCUSTOMDRAW)pNMHDR;

    switch(lplvcd->nmcd.dwDrawStage)
{
case CDDS_PREPAINT:
    *pResult = CDRF_NOTIFYSUBITEMDRAW;
  break;
case CDDS_ITEMPREPAINT:
      *pResult = CDRF_NOTIFYSUBITEMDRAW;
  break;
case CDDS_ITEMPREPAINT|CDDS_SUBITEM:
  {
   int iCol = lplvcd->iSubItem;
   int iRow = lplvcd->nmcd.dwItemSpec;
   CString sItem = GetItemText(iRow, iCol);
   CRect rcItem;
   GetCellRect(iRow, iCol, LVIR_BOUNDS, rcItem);

   CDC *pDC= CDC::FromHandle(lplvcd->nmcd.hdc);
   int State = ListView_GetItemState(m_hWnd, iRow, LVIS_CUT|LVIS_SELECTED|LVIS_FOCUSED);

   pDC->FillSolidRect(&rcItem, (State &LVIS_SELECTED) ? m_clrHBkgnd : m_clrBkgnd);
   rcItem.DeflateRect(2, 1);
   if(sItem.Right(1) == '%')
   {
    pDC->Rectangle(rcItem);
    rcItem.DeflateRect(1, 1);
    CRect rcLeft, rcRight;
    rcLeft = rcRight = rcItem;
    rcLeft.right = rcLeft.left + MulDiv(atoi(sItem), rcItem.Width(), 100);
    rcRight.left = rcLeft.right;
    if((State &LVIS_SELECTED))
    {
    // pDC->FillSolidRect(rcLeft, m_clrHPercent);
    // pDC->FillSolidRect(rcRight, m_clrBkgnd);
     pDC->FillSolidRect(rcLeft, m_clrPercent);
     pDC->FillSolidRect(rcRight, m_clrBkgnd);

     pDC->SetTextColor(m_clrText);
     pDC->DrawText(sItem, rcItem, DT_VCENTER|DT_CENTER|DT_SINGLELINE);
    }
    else
    {
     pDC->FillSolidRect(rcLeft, m_clrPercent);
     pDC->FillSolidRect(rcRight, m_clrHPercent);
     CRgn rgn;
     rgn.CreateRectRgnIndirect(rcLeft);
     pDC->SelectClipRgn(&rgn);
     pDC->SetTextColor(m_clrBkgnd);
     pDC->DrawText(sItem, rcItem, DT_VCENTER|DT_CENTER|DT_SINGLELINE);

     rgn.SetRectRgn(rcRight);
     pDC->SelectClipRgn(&rgn);
     pDC->SetTextColor(m_clrText);
     pDC->DrawText(sItem, rcItem, DT_VCENTER|DT_CENTER|DT_SINGLELINE);
     pDC->SelectClipRgn(NULL);
    }
   }
   else
   {
    pDC->SetTextColor((State & LVIS_SELECTED) ? m_clrHText:m_clrText);
    pDC->DrawText(sItem, -1, &rcItem, DT_NOCLIP | DT_LEFT | DT_VCENTER);
   }
  }
  *pResult= CDRF_SKIPDEFAULT;
  break;
}

}

3.添加函数

GetCellRect(int iRow, int iCol, int nArea, CRect &rect)

{

if(iCol)
  return GetSubItemRect(iRow, iCol, nArea, rect);

if(GetHeaderCtrl()->GetItemCount() == 1)
  return GetItemRect(iRow, rect, nArea);

CRect rCol1;
if(!GetSubItemRect(iRow, 1, nArea, rCol1))
  return FALSE;

if(!GetItemRect(iRow, rect, nArea))
  return FALSE;

rect.right = rCol1.left;

return TRUE;

}