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帮助WinAPI的雕塑
原标题:Help with WinAPI scroll bars
  • 时间:2010-06-05 13:46:10
  •  标签:
  • c++
  • c
  • winapi

现在 我有一个窗口,有横向和纵向的隔.。 我利用这些参数着手进行。

//Set OGL Frame scroll bar
    SCROLLINFO inf;
    inf.cbSize = sizeof(SCROLLINFO);
    inf.fMask = SIF_PAGE | SIF_POS;
    inf.nPage = 20;
    inf.nPos = 30;

它在中心创建,我也像其规模一样,但当我把我编成50人,造成cho。 我怎么能够给酒吧增添更多的解决办法,并且仍然保持同样的umb。 我是否能够根据上述参数计算律师协会的规模和位置?

增 编

最佳回答
问题回答

这里是我处理滚动活动的旧法典。 您可以采用相同的“定制”办法。

Note that it s (probable) not the better way of Settlement this problem, but still a working one.

  case WM_VSCROLL:
    {
      TEXTHANDLER * handler = ((TEXTHANDLER *)GetProp(hWnd, "TEXTHANDLER"));
      BOOL needInvalidation = TRUE;
      SCROLLINFO   si; 

      si.cbSize = sizeof(si);
      si.fMask  = SIF_ALL;
      GetScrollInfo(hWnd, SB_VERT, &si);

      switch (LOWORD(wParam))
      {
      case SB_LINEUP: 
        si.nPos -= 1;
        if (si.nPos < 0)
        {
          si.nPos = 0;
          needInvalidation = FALSE;
        }
        break;

      case SB_LINEDOWN: 
        si.nPos += 1;
        if (si.nPos > si.nMax)
        {
          si.nPos = si.nMax;
          needInvalidation = FALSE;
        }
        break;

      case SB_PAGEUP:
        si.nPos -= handler->renderer->cyCount;
        if (si.nPos < 0)
        {
          si.nPos = 0;
          needInvalidation = FALSE;
        }
        break;

      case SB_PAGEDOWN:
        si.nPos += handler->renderer->cyCount;
        if (si.nPos > si.nMax)
        {
          si.nPos = si.nMax;
          needInvalidation = FALSE;
        }
        break;

      case SB_THUMBTRACK: 
        si.nPos = si.nTrackPos;
        break;
      }

      si.fMask = SIF_POS;
      SetScrollInfo(hWnd, SB_VERT, &si, TRUE);

      // Set new text renderer parameters
      handler->renderer->yPos = si.nPos;

      if (needInvalidation) InvalidateRect(hWnd, NULL, FALSE);
      return 0;
    }




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