private int ProcessNotifyMessage(IntPtr hWnd, InteropUtil.OFNOTIFY notifyData)
{
switch (notifyData.hdr_code)
{
case InteropUtil.CDN_FOLDERCHANGE:
{
string newFolder = GetTextFromCommonDialog(hWnd.GetParent().AssumeNonZero(), InteropUtil.CDM_GETFOLDERPATH);
if (m_currentFolder != null && newFolder != null && newFolder.PathContains(m_currentFolder))
{
m_suppressSelectionChange = true;
}
m_currentFolder = newFolder;
IntPtr fileNameCombo = hWnd.GetParent().AssumeNonZero().GetDlgItem(InteropUtil.ID_FileNameCombo).AssumeNonZero();
if (m_hasDirChangeFired)
{
fileNameCombo.SetWindowTextW("");
}
m_hasDirChangeFired = true;
break;
}
case InteropUtil.CDN_FILEOK:
{
if (!AcceptFiles)
{
return(1);
}
break;
}
case InteropUtil.CDN_INITDONE:
{
IntPtr hParent = hWnd.GetParent();
IntPtr hFile = hParent.AssumeNonZero().GetDlgItem(InteropUtil.ID_FileNameCombo).AssumeNonZero();
hFile.SetFocus();
break;
}
}
return(0);
}
protected override IntPtr HookProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lparam)
{
switch (unchecked ((uint)msg))
{
case InteropUtil.WM_INITDIALOG:
{
InitDialog(hWnd);
break;
}
case InteropUtil.WM_NOTIFY:
{
InteropUtil.OFNOTIFY notifyData = (InteropUtil.OFNOTIFY)Marshal.PtrToStructure(lparam, typeof(InteropUtil.OFNOTIFY));
int results = ProcessNotifyMessage(hWnd, notifyData);
if (results != 0)
{
hWnd.SetWindowLongW(InteropUtil.DWL_MSGRESULT, results);
return((IntPtr)results);
}
break;
}
case InteropUtil.WM_SIZE:
{
ResizeCustomControl(hWnd);
break;
}
case InteropUtil.WM_COMMAND:
{
unchecked
{
IntPtr hParent = hWnd.GetParent().AssumeNonZero();
uint code = HIGH((uint)wParam);
uint id = LOW((uint)wParam);
if (code == InteropUtil.BN_CLICKED)
{
switch (id)
{
case InteropUtil.ID_CUSTOM_CANCEL:
{
//The user clicked our custom cancel button. Close the dialog.
hParent.SendMessage(InteropUtil.WM_CLOSE, 0, 0);
break;
}
case InteropUtil.ID_SELECT:
{
IntPtr hFileName = hParent.GetDlgItem(InteropUtil.ID_FileNameCombo);
string currentText = (hFileName.GetWindowTextW() ?? "").Trim();
if (currentText == "" && !string.IsNullOrEmpty(m_currentFolder))
{
//there's not text in the box, so the user must want to select the current folder.
m_useCurrentDir = true;
hParent.SendMessage(InteropUtil.WM_CLOSE, 0, 0);
break;
}
else if (System.IO.Path.IsPathRooted(currentText))
{
if (Directory.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.
m_useCurrentDir = true;
m_currentFolder = currentText;
hParent.SendMessage(InteropUtil.WM_CLOSE, 0, 0);
break;
}
}
else if (!string.IsNullOrEmpty(m_currentFolder) && currentText != "")
{
string combined = System.IO.Path.Combine(m_currentFolder, currentText);
if (Directory.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.
m_useCurrentDir = true;
m_currentFolder = combined;
hParent.SendMessage(InteropUtil.WM_CLOSE, 0, 0);
break;
}
}
//The user has not selected an existing folder.
//So we translate a click of our "Select" button into the OK button and forward the request to the
//open file dialog.
hParent.SendMessage
(
InteropUtil.WM_COMMAND,
(InteropUtil.BN_CLICKED << 16) | InteropUtil.IDOK,
unchecked ((uint)hParent.GetDlgItem(InteropUtil.IDOK))
);
break;
}
}
}
}
break;
}
}
return(base.HookProc(hWnd, msg, wParam, lparam));
}
