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));
var oldSelected = (nmListView.uOldState & InteropUtil.LVIS_SELECTED) != 0;
var 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.
var hParent = hWnd.GetParent();
var hFNCombo = hParent.GetDlgItem(InteropUtil.ID_FileNameCombo);
var hFNEditBox = hParent.GetDlgItem(InteropUtil.ID_FileNameTextBox);
var hFocus = InteropUtil.GetFocus();
if
(
(hFNCombo == IntPtr.Zero || hFNCombo != hFocus) &&
(hFNEditBox == IntPtr.Zero || hFNEditBox != hFocus)
)
{
SetFileNameToSelectedItem(header.hwndFrom, hFNCombo, nmListView.iItem);
}
}
m_suppressSelectionChange = false;
}
}
}
return hWnd.DefSubclassProc(uMsg, wParam, lParam);
}
private int ProcessNotifyMessage(IntPtr hWnd, InteropUtil.OFNOTIFY notifyData)
{
switch (notifyData.hdr_code)
{
case InteropUtil.CDN_FOLDERCHANGE:
{
var newFolder = GetTextFromCommonDialog(hWnd.GetParent().AssumeNonZero(), InteropUtil.CDM_GETFOLDERPATH);
if (m_currentFolder != null && newFolder != null && newFolder.PathContains(m_currentFolder))
{
m_suppressSelectionChange = true;
}
m_currentFolder = newFolder;
var 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:
{
var hParent = hWnd.GetParent();
var hFile = hParent.AssumeNonZero().GetDlgItem(InteropUtil.ID_FileNameCombo).AssumeNonZero();
hFile.SetFocus();
break;
}
}
return 0;
}
private void InitDialog(IntPtr hWnd)
{
m_hWnd = hWnd;
var hParent = hWnd.GetParent().AssumeNonZero();
hParent.SetWindowSubclass(m_openFileSubClassDelegate, 0, 0);
//disable and hide the filter combo box
var hFilterCombo = hParent.GetDlgItem(InteropUtil.ID_FilterCombo).AssumeNonZero();
hFilterCombo.EnableWindow(false);
hParent.SendMessage(InteropUtil.CDM_HIDECONTROL, InteropUtil.ID_FilterCombo, 0);
hParent.SendMessage(InteropUtil.CDM_HIDECONTROL, InteropUtil.ID_FilterLabel, 0);
//update the file name label
var hFileNameLabel = hParent.GetDlgItem(InteropUtil.ID_FileNameLabel).AssumeNonZero();
if (FileNameLabel != "")
{
hFileNameLabel.SendMessageString(InteropUtil.WM_SETTEXT, 0, FileNameLabel);
}
//find the button controls in the parent
var hOkButton = hParent.GetDlgItem(InteropUtil.IDOK).AssumeNonZero();
var hCancelButton = hParent.GetDlgItem(InteropUtil.IDCANCEL).AssumeNonZero();
//We don't want the accelerator keys for the ok and cancel buttons to work, because
//they are not shown on the dialog. However, we still want the buttons enabled
//so that "esc" and "enter" have the behavior they used to. So, we just
//clear out their text instead.
hOkButton.SetWindowTextW("");
hCancelButton.SetWindowTextW("");
//find our button controls
var hSelectButton = hWnd.GetDlgItem(InteropUtil.ID_SELECT).AssumeNonZero();
var hCustomCancelButton = hWnd.GetDlgItem(InteropUtil.ID_CUSTOM_CANCEL).AssumeNonZero();
//copy the font from the parent's buttons
hSelectButton.LoadFontFrom(hOkButton);
hCustomCancelButton.LoadFontFrom(hCancelButton);
var cancelLoc = hCancelButton.GetWindowPlacement();
//hide the ok and cancel buttons
hParent.SendMessage(InteropUtil.CDM_HIDECONTROL, InteropUtil.IDOK, 0);
hParent.SendMessage(InteropUtil.CDM_HIDECONTROL, InteropUtil.IDCANCEL, 0);
//expand the file name combo to take up the space left by the OK and cancel buttons.
var hFileName = hParent.GetDlgItem(InteropUtil.ID_FileNameCombo).AssumeNonZero();
var fileNameLoc = hFileName.GetWindowPlacement();
fileNameLoc.Right = hOkButton.GetWindowPlacement().Right;
hFileName.SetWindowPlacement(ref fileNameLoc);
var parentLoc = hParent.GetWindowPlacement();
//subtract the height of the missing cancel button
parentLoc.Bottom -= (cancelLoc.Bottom - cancelLoc.Top);
hParent.SetWindowPlacement(ref parentLoc);
//move the select and custom cancel buttons to the right hand side of the window:
var selectLoc = hSelectButton.GetWindowPlacement();
var customCancelLoc = hCustomCancelButton.GetWindowPlacement();
m_cancelWidth = customCancelLoc.Right - customCancelLoc.Left;
m_selectWidth = selectLoc.Right - selectLoc.Left;
m_buttonGap = customCancelLoc.Left - selectLoc.Right;
var ctrlLoc = hWnd.GetWindowPlacement();
ctrlLoc.Right = fileNameLoc.Right;
//ResizeCustomControl(hWnd, fileNameLoc.Right, hCustomCancelButton, hSelectButton);
ResizeCustomControl(hWnd);
}
private void ResizeCustomControl(IntPtr hWnd)
{
if (hWnd == m_hWnd)
{
var hSelectButton = hWnd.AssumeNonZero().GetDlgItem(InteropUtil.ID_SELECT).AssumeNonZero();
var hOkButton = hWnd.AssumeNonZero().GetDlgItem(InteropUtil.ID_CUSTOM_CANCEL).AssumeNonZero();
var hParent = hWnd.GetParent().AssumeNonZero();
var fileName = hParent.GetDlgItem(InteropUtil.ID_FileNameCombo).AssumeNonZero();
/*var right = fileName.GetWindowPlacement().Right;
var top = hSelectButton.GetWindowPlacement().Top;*/
var rect = new InteropUtil.RECT();
var selectRect = hSelectButton.GetWindowPlacement();
rect.top = selectRect.Top;
rect.bottom = selectRect.Bottom;
rect.right = fileName.GetWindowPlacement().Right;
rect.left = rect.right - (m_cancelWidth + m_buttonGap + m_selectWidth);
ResizeCustomControl(hWnd, rect, hOkButton, hSelectButton);
}
}
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:
{
var notifyData = (InteropUtil.OFNOTIFY)Marshal.PtrToStructure(lparam, typeof(InteropUtil.OFNOTIFY));
var 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
{
var hParent = hWnd.GetParent().AssumeNonZero();
var code = HIGH((uint)wParam);
var 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:
{
var hFileName = hParent.GetDlgItem(InteropUtil.ID_FileNameCombo);
var 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 != "")
{
var 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);
}
