CListCtrl::SetItemState

Nancy Enright -- Nancy_Enright.IDEA@mailgw.idea.com
Friday, May 03, 1996

[Mini-digest: Question with answer]

Using VC++ 4.1, Win 95.  

I have 3 CListCtrls on a Wizard Page. Each control has two items with
icons and labels.  There is nothing else in the dialog box. Using:
m_pList->SetItemState(0,LVIS_SELECTED, 0x000F); I am able to set the
default to the first item in the first control during OnInitDialog.
But I am unable to set the default in the other two controls using the
same approach.  Any ideas?

More details:  The return from all three calls to SetItemState is OK.
SetItemState maps to SetItem in AFXCMN.INL.  I have traced into
CListCtrl::SetItem and checked all of the LV_ITEM values and the
control handle passed in.  Everything looks fine.  CListCtrl::SetItem
calls ::SendMessage(m_hWnd, LVM_SETITEM, 0, (LPARAM)&lvi);  I have
verified that the messages were sent and received using Spy++.  Here is
the code that I call at the end of OnInitDialog.  The first call works
but the second and third do not.

void CDisplayPg::SetDefaults()
{
  m_pListColorMono->SetItemState(DEVICE_COLOR,LVIS_SELECTED, 0x000F);
  m_pListCols->SetItemState(DEVICE_80,LVIS_SELECTED, 0x000F);
  m_pListGraphics->SetItemState(DEVICE_NON_GRAPHICS,LVIS_SELECTED, 0x000F);
}

I have checked MSDN, online help and all the books I can get my hands on - 
without luck.  Any help would be really appreciated!!

Nancy Enright
nenright@idea.com

-----From: Nancy Enright 

I found the answer:  I call CDisplayPg::SetListCtrlSyle() at the end of 
OnInitDialog.  It sets LVS_SHOWSELALWAYS so that the CListCtrl selection shows 
even if the control does not have the focus. 

void CDisplayPg::SetListCtrlSyle()
{
    LONG lStyle;
    // set the LVS_SHOWSELALWAYS so that the selection shows even if the
    // control does not have the focus.

 // color
    lStyle = GetWindowLong (m_pListColorMono->m_hWnd, GWL_STYLE);
    lStyle |= LVS_SHOWSELALWAYS;
    SetWindowLong (m_pListColorMono->m_hWnd, GWL_STYLE, lStyle);

 // cols
    lStyle = GetWindowLong (m_pListCols->m_hWnd, GWL_STYLE);
    lStyle |= LVS_SHOWSELALWAYS;
    SetWindowLong (m_pListCols->m_hWnd, GWL_STYLE, lStyle);

 // graphs
    lStyle = GetWindowLong (m_pListGraphics->m_hWnd, GWL_STYLE);
    lStyle |= LVS_SHOWSELALWAYS;
    SetWindowLong (m_pListGraphics->m_hWnd, GWL_STYLE, lStyle);


}

---

Chuck McCorvey -- chuckm@solutionware.com
Wednesday, May 08, 1996


You migth want to use CWnd::ModifyStyle() in your solution rather than the GetWindowLong/SetWindowLong sequence...

----------
From: 	Nancy Enright[SMTP:Nancy_Enright.IDEA@idea.com]
Sent: 	Friday, May 03, 1996 1:07 PM
To: 	mfc-l
Subject: 	CListCtrl::SetItemState

[Mini-digest: Question with answer]

Using VC++ 4.1, Win 95.  

I have 3 CListCtrls on a Wizard Page. Each control has two items with
icons and labels.  There is nothing else in the dialog box. Using:
m_pList->SetItemState(0,LVIS_SELECTED, 0x000F); I am able to set the
default to the first item in the first control during OnInitDialog.
But I am unable to set the default in the other two controls using the
same approach.  Any ideas?

More details:  The return from all three calls to SetItemState is OK.
SetItemState maps to SetItem in AFXCMN.INL.  I have traced into
CListCtrl::SetItem and checked all of the LV_ITEM values and the
control handle passed in.  Everything looks fine.  CListCtrl::SetItem
calls ::SendMessage(m_hWnd, LVM_SETITEM, 0, (LPARAM)&lvi);  I have
verified that the messages were sent and received using Spy++.  Here is
the code that I call at the end of OnInitDialog.  The first call works
but the second and third do not.

...code omitted...

I found the answer:  I call CDisplayPg::SetListCtrlSyle() at the end of 
OnInitDialog.  It sets LVS_SHOWSELALWAYS so that the CListCtrl selection shows 
even if the control does not have the focus. 

void CDisplayPg::SetListCtrlSyle()
{
    LONG lStyle;
    // set the LVS_SHOWSELALWAYS so that the selection shows even if the
    // control does not have the focus.

 // color
    lStyle = GetWindowLong (m_pListColorMono->m_hWnd, GWL_STYLE);
    lStyle |= LVS_SHOWSELALWAYS;
    SetWindowLong (m_pListColorMono->m_hWnd, GWL_STYLE, lStyle);

... extra code omitted

}

---

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