Supporting dark mode

[ajtruckle]

I can easily set the colour scheme of the grid control, but not when it comes to in place editing.

I tried using SetWindowTheme, which works for regular combo / edit on my dialogs but the grid continues to use white background when editing.

[ajtruckle]

Step 1 is to modify the CInPlaceList constructor, adding this code after the control has been created:

SetWindowTheme(GetSafeHwnd(), L"DarkMode_CFD", nullptr);
COMBOBOXINFO cbi{};
cbi.cbSize = sizeof(COMBOBOXINFO);
if (GetComboBoxInfo(pControl->GetSafeHwnd(), &cbi) && cbi.hwndList)
{
	SetWindowTheme(cbi.hwndList, L"DarkMode_Explorer", nullptr);
}

Now the combo is dark when you go to edit mode (but the droplist is still white, and the inplace edit is white):

[ajtruckle]

Sadly, this code has no effect:

HBRUSH CInPlaceList::CtlColor(CDC* pDC, UINT nCtlColor) 
{
    static auto hbr = CreateSolidBrush(RGB(255, 0, 0));
    pDC->SetBkMode(RGB(255, 0, 0));
    pDC->SetTextColor(RGB(255, 255, 0));
    return hbr;
     /*
    static CBrush brush(m_crBackClr);
    pDC->SetTextColor(m_crForeClr);
    pDC->SetBkMode(TRANSPARENT);
    return (HBRUSH) brush.GetSafeHandle();
    */
	
	// TODO: Return a non-NULL brush if the parent's handler should not be called
	//return nullptr;
}

The combo droplist is still white. So something else is overriding it, even though the code is called.