Re: Problem in resizing with scroll bar

From:

"AliR [VC++ MVP]" <AliR@online.nospam>

Newsgroups:

microsoft.public.vc.mfc

Date:

Tue, 23 Jun 2009 13:25:59 -0500

Message-ID:

<F090m.5755$Dx2.2066@flpi146.ffdc.sbc.com>

I'm pretty sure you will need to set your scroll sizes to the original size
of your dialog minus the current size of the dialog, basically the delta
between the original and current size. If your dialog is 700 pixels tall
and the user has resized to 600 pixels tall you only want to scroll 100
pixels not 700 pixels.

By the way I hate scrolling dialogs, have you considered resizing the
controls on your dialog.
http://www.codeproject.com/KB/dialog/easysize.aspx

AliR.

"Mohit" <behappy.mohit@gmail.com> wrote in message
news:225e9e78-9b89-45cf-a90d-f687309474de@x6g2000prc.googlegroups.com...

Hi,
I m making dialog based application .I am trying to make resizable
dialog with scroll bar.I had put maximum and minimum size in
void CMainDlg::OnGetMinMaxInfo(MINMAXINFO* lpMMI)
{
lpMMI->ptMinTrackSize.x=710;
lpMMI->ptMinTrackSize.y=335;

lpMMI->ptMaxTrackSize.x =710;
lpMMI->ptMaxTrackSize.y =675;

CDialog::OnGetMinMaxInfo(lpMMI);
}
Vertical scroll coding
void CMainDlg::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar*
pScrollBar)
{
int nDelta;
int nMaxPos = m_rect.Height() - m_nCurHeight;

{switch (nSBCode)
{
case SB_LINEDOWN:
if (m_nScrollPos >= nMaxPos)
return;
nDelta = min(nMaxPos/100,nMaxPos-m_nScrollPos);
break;

case SB_LINEUP:
if (m_nScrollPos <= 0)
return;
nDelta = -min(nMaxPos/100,m_nScrollPos);
break;

case SB_PAGEDOWN:
if (m_nScrollPos >= nMaxPos)
return;
nDelta = min(nMaxPos/10,nMaxPos-m_nScrollPos);
break;

case SB_THUMBPOSITION:
nDelta = (int)nPos - m_nScrollPos;
break;

case SB_PAGEUP:
if (m_nScrollPos <= 0)
return;
nDelta = -min(nMaxPos/10,m_nScrollPos);
break;

default:
return;
}
m_nScrollPos += nDelta;
SetScrollPos(SB_VERT,m_nScrollPos,TRUE);
ScrollWindow(0,-nDelta);
}
CDialog::OnVScroll(nSBCode, nPos, pScrollBar);

}
My maximun size is default dialog size
My problem is when i decrease size of dialog and scroll down then
increas size vertically
Then some extra dialog start appearing which i dont want.
Can any body suggest me how can i solve my problem

Mohit