private int OpenFileSubClass
(
IntPtr hWnd,
uint uMsg,
IntPtr wParam,
IntPtr lParam,
IntPtr uIdSubclass,
uint dwRefData
)
{
switch (uMsg)
{
case InteropUtil.WM_PARENTNOTIFY:
{
unchecked
{
int id = InteropUtil.GetDlgCtrlID(lParam);
if (LOW((uint)wParam) == InteropUtil.WM_CREATE &&
(id == InteropUtil.ID_FileList || id == 0))
{
InteropUtil.SetWindowSubclass(lParam, m_defViewSubClassDelegate, 0, 0);
}
}
break;
}
}
return(InteropUtil.DefSubclassProc(hWnd, uMsg, wParam, lParam));
}
private int DefViewSubClass
(
IntPtr hWnd,
uint uMsg,
IntPtr wParam,
IntPtr lParam,
IntPtr uIdSubclass,
uint dwRefData
)
{
if (uMsg == InteropUtil.WM_NOTIFY)
{
var header = (InteropUtil.NMHDR)Marshal.PtrToStructure(lParam, typeof(InteropUtil.NMHDR));
if (header.code == InteropUtil.LVN_ITEMCHANGED && header.hwndFrom != IntPtr.Zero && header.idFrom == 1)
{
var nmListView =
(InteropUtil.NMLISTVIEW)Marshal.PtrToStructure(lParam, typeof(InteropUtil.NMLISTVIEW));
bool oldSelected = (nmListView.uOldState & InteropUtil.LVIS_SELECTED) != 0;
bool newSelected = (nmListView.uNewState & InteropUtil.LVIS_SELECTED) != 0;
if (!oldSelected && newSelected)
{
if (!m_suppressSelectionChange)
{
//the item went from not selected to being selected
//so we want to look and see if the selected item is a folder, and if so
//change the text of the item box to be the item on the folder. But, before we do that
//we want to make sure that the box isn't currently focused.
IntPtr hParent = InteropUtil.GetParent(hWnd);
IntPtr hFNCombo = InteropUtil.GetDlgItem(hParent, InteropUtil.ID_FileNameCombo);
IntPtr hFNEditBox = InteropUtil.GetDlgItem(hParent, InteropUtil.ID_FileNameTextBox);
IntPtr hFocus = InteropUtil.GetFocus();
if
(
(hFNCombo == IntPtr.Zero || hFNCombo != hFocus) &&
(hFNEditBox == IntPtr.Zero || hFNEditBox != hFocus)
)
{
SetFileNameToSelectedItem(header.hwndFrom, hFNCombo, nmListView.iItem);
}
}
m_suppressSelectionChange = false;
}
}
}
return(InteropUtil.DefSubclassProc(hWnd, uMsg, wParam, lParam));
}
