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How to dynamically change size of a property page in property sheet?

Posted on 2000-03-07
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Last Modified: 2013-11-20
I have a property sheet dialog box with two property pages.
  I have a button(say labled "resize") on one of my property pages.On pressing that button I want to change the size of the property sheet dialog box.
  How is it possible?
  Moreover I want to place the "OK","CANCEL","APPLY" buttons of property sheet at desired locations on dialog box.How is this also possible?


How to dynamically change size of a property page in property sheet?
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Question by:sjhunjhunuwala
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Accepted Solution

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maknight earned 50 total points
ID: 2591452
A bit more involved than a 50-pointer, but here goes. . . The trick here, is to actually create the dialog as the largest you want it, add a control (usually a "line") that you can key off of as the bottom of the smallest version of the dialog, and then redraw as needed. You can create a "line" by using the picture frame and collapsing it all the way down. Here's some code as I used it.

    // get current dialog window rectangle
    CRect rcDialog;
    GetWindowRect(&rcDialog);
    int nNewHeight = -1;

    if (bExpand)
        {
        // change caption
        pWndButton->SetWindowText(strLess);

        // calculate new dialog height
        CWnd* pWndLarge = GetDlgItem(nLargeID);
        ASSERT_VALID(pWndLarge);
        CRect rcLarge;
        pWndLarge->GetWindowRect(&rcLarge);
        nNewHeight = rcLarge.top - rcDialog.top;
        }
    else
        {
        // change caption
        pWndButton->SetWindowText(strMore);

        // calculate new dialog height
        CWnd* pWndSmall = GetDlgItem(nSmallID);
        ASSERT_VALID(pWndSmall);
        CRect rcSmall;
        pWndSmall->GetWindowRect(&rcSmall);
        nNewHeight = rcSmall.top - rcDialog.top;
        }

    // set new dialog height
    ASSERT(nNewHeight > 0);
    SetWindowPos(NULL, 0, 0, rcDialog.Width(), nNewHeight, SWP_NOMOVE | SWP_NOZORDER);

    // set the enabled state for controls depending on whether visible or not
    CWnd* pWndControl = GetWindow(GW_CHILD);
    while (pWndControl != NULL)
        {
        CRect rcControl;
        pWndControl->GetWindowRect(&rcControl);
        pWndControl->EnableWindow(rcControl.top <= rcDialog.top + nNewHeight);
        pWndControl = pWndControl->GetWindow(GW_HWNDNEXT);
        }
    CWnd* pWndActiveControl = CWnd::GetFocus();
    if (pWndActiveControl == NULL)
        {
        CWnd* pWndFirstControl = GetNextDlgTabItem(NULL);
        ASSERT_VALID(pWndFirstControl);
        ASSERT(pWndFirstControl->IsWindowEnabled());
        pWndFirstControl->SetFocus();
        }

As for the property page buttons... Use the OnInitDialog override, add a new function (say, MoveTheButtons), get the rectangle for each of the buttons one by one, using:

CWnd* pWndOK = pSheet->GetDialogItem(IDOK);
CRect rcOK;
pWndOK->GetWindowRect(&rcOK);
pWndOK->ScreenToClient(&rcOK);

Then, get the property sheet client rectangle using:
CRect rcClient;
pSheet->GetClientRect(&rcClient);

Next, computer your new desired locations, then call SetWindowPos for each button.

pWndOK->SetWindowPos(NULL, nCurrentX, nTop, 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);
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