How to fixed CMFCPropertyListCtrl's column width? - c++

Question

I have customized the column width CMFCPropertyListCtrl by overriding the same class.
Code:
class CMyPropertyGridCtrl : public CMFCPropertyGridCtrl
{
public:
void SetFirstColumnWidth(int width)
{
m_nLeftColumnWidth = width;
AdjustLayout();
}
};
And in OnSize() method of the class where pChannelListCtrl is declare as data member, I have called this method.
I want to fixed second column with size 50.
Code:
int iWidth = pChannelListCtrl.GetLeftColumnWidth();
pChannelListCtrl.SetFirstColumnWidth(iWidth + (iWidth - 50));
Here, its display as expected.(Second column with size 50).
Problem:
I want to keep the second column size fixed. But, here its resizable.
Can you please guide me, how to restrict the column resize.
Thanks,
Abdula

Answer 1

Override CMFCPropertyGridCtrl::SetLeftColumnWidth.
The header control for the grid is accessed with CMFCPropertyGridCtrl::GetHeaderCtrl()
Optionally, you can disable the header control to prevent resizing GetHeaderCtrl().EnableWindow(FALSE);
class CMyPropertyGridCtrl : public CMFCPropertyGridCtrl
{
public:
CMyPropertyGridCtrl()
{
m_nLeftColumnWidth = 50;
}
void make_fixed_header()
{
HDITEM hdItem = { 0 };
hdItem.mask = HDI_FORMAT;
GetHeaderCtrl().GetItem(0, &hdItem);
hdItem.fmt |= HDF_FIXEDWIDTH;
GetHeaderCtrl().SetItem(0, &hdItem);
}
void SetLeftColumnWidth(int cx)
{
m_nLeftColumnWidth = cx;
AdjustLayout();
}
void OnSize(UINT f, int cx, int cy)
{
EndEditItem();
if (cx > 50)
m_nLeftColumnWidth = cx - 50; //<- 2nd column will be 50 pixels
AdjustLayout();
}
DECLARE_MESSAGE_MAP()
};
BEGIN_MESSAGE_MAP(CMyPropertyGridCtrl, CMFCPropertyGridCtrl)
ON_WM_SIZE()
END_MESSAGE_MAP()
Use HDF_FIXEDWIDTH to fix the column for header control. From parent window call these functions after the control is created:
grid.SetLeftColumnWidth(50);
grid.make_fixed_header();
CMyPropertyGridCtrl::SetLeftColumnWidth will not detect when column is resized by the user. Override CMyPropertyGridCtrl::OnHeaderItemChanged in order to detect changes requested by user.