win32里 关于滚动条滚动图形+文字的问题
我现在有个问题困绕我很久了,想的我晚上都睡不着觉,小第就21分了全送啊.
问题:win32程序,要在屏幕上打印一个表格,我是用moveto,lineto画线函数实现的,然后往表格里填内容,有英文有中文有数字,这些内容是从文件里读出来的,计算坐标后,用Textout函数打印上的.这些我都实现了,但是问题就是表格已经超出屏幕的大小了,文字也超出了,所以超出的部分根本看不见. 我在网上看有人发过滚动的例子,但只是滚动一行行的文字,现在是连表格带文字一起滚动,如何实现啊?请高人给予指点啊...
伏上简单的代码更谢谢了.555

[解决办法]
case WM_VSCROLL:
// Get all the vertial scroll bar information
si.cbSize = sizeof (si);
si.fMask = SIF_ALL;
GetScrollInfo (hwnd, SB_VERT, &si);
// Save the position for comparison later on
yPos = si.nPos;
switch (LOWORD (wParam))
{
// user clicked the HOME keyboard key
case SB_TOP:
si.nPos = si.nMin;
break;

// user clicked the END keyboard key
case SB_BOTTOM:
si.nPos = si.nMax;
break;

// user clicked the top arrow
case SB_LINEUP:
si.nPos -= 1;
break;

// user clicked the bottom arrow
case SB_LINEDOWN:
si.nPos += 1;
break;

// user clicked the scroll bar shaft above the scroll box
case SB_PAGEUP:
si.nPos -= si.nPage;
break;

// user clicked the scroll bar shaft below the scroll box
case SB_PAGEDOWN:
si.nPos += si.nPage;
break;

// user dragged the scroll box
case SB_THUMBTRACK:
si.nPos = si.nTrackPos;
break;

default:
break;
}
// Set the position and then retrieve it. Due to adjustments
// by Windows it may not be the same as the value set.
si.fMask = SIF_POS;
SetScrollInfo (hwnd, SB_VERT, &si, TRUE);
GetScrollInfo (hwnd, SB_VERT, &si);
// If the position has changed, scroll window and update it
if (si.nPos != yPos)
{
ScrollWindow(hwnd, 0, yChar * (yPos - si.nPos), NULL, NULL);
UpdateWindow (hwnd);
}
return 0;

case WM_PAINT :
// Prepare the window for painting
hdc = BeginPaint (hwnd, &ps);
// Get vertical scroll bar position
si.cbSize = sizeof (si);
si.fMask = SIF_POS;
GetScrollInfo (hwnd, SB_VERT, &si);
yPos = si.nPos;
// Get horizontal scroll bar position
GetScrollInfo (hwnd, SB_HORZ, &si);
xPos = si.nPos;
// Find painting limits
FirstLine = max (0, yPos + ps.rcPaint.top / yChar);
LastLine = min (LINES - 1, yPos + ps.rcPaint.bottom / yChar);

for (i = FirstLine; i <= LastLine; i++)
{
x = xChar * (1 - xPos);
y = yChar * (i - yPos);

// Note that "55 " in the following depends on the
// maximum size of an abc[] item.
//
hr = StringCchLength(abc[i], 55, abcLength);
if ((FAILED(hr))|(abcLength == NULL))
{
//
// TODO: write error handler
//
}

}
// Indicate that painting is finished
EndPaint (hwnd, &ps);
return 0;

case WM_DESTROY :
PostQuitMessage (0);
return 0;
}
return DefWindowProc (hwnd, uMsg, wParam, lParam);
}