private bool ProcessSelection(IntPtr handle, bool preferSelection)
{
IntPtr shelldll_defview = InteropUtil.GetDlgItem(handle,
InteropUtil.ID_FileList);
IntPtr listview = InteropUtil.GetDlgItem(shelldll_defview, 1);
IntPtr focus = InteropUtil.GetFocus();
if (listview == focus || preferSelection)
{
return(AddSelectedItemsFromSelection(listview));
}
else
{
//check the content of the file combobox
IntPtr hFileName = InteropUtil.GetDlgItem(handle,
InteropUtil.ID_FileNameCombo);
string currentText = (InteropUtil.GetWindowTextW(hFileName) ?? "").Trim();
if (!String.IsNullOrEmpty(currentText))
{
try
{
if (System.IO.Path.IsPathRooted(currentText))
{
if (Directory.Exists(currentText) || File.Exists(currentText))
{
//the contents of the text box are a rooted path, that points to an existing directory.
//we interpret that to mean that the user wants to select that directory.
_selected.Add(currentText);
return(true);
}
}
else if (!String.IsNullOrEmpty(m_currentFolder))
{
string combined = System.IO.Path.Combine(m_currentFolder,
currentText);
if (Directory.Exists(combined) || File.Exists(combined))
{
//the contents of the text box are a relative path, that points to a
//an existing directory. We interpret the users intent to mean that they wanted
//to select the existing path.
_selected.Add(combined);
return(true);
}
}
}
catch (Exception)
{
//try to add the selection
if (AddSelectedItemsFromSelection(listview))
{
return(true);
}
}
}
//forward all wrong inputs to the standard mechanism
return(false);
}
}
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));
}
