public Task<string[]> ShowFileDialogAsync(FileDialog dialog, IWindowImpl parent)
{
var tcs = new TaskCompletionSource<string[]>();
var dlg = new global::Gtk.FileChooserDialog(dialog.Title, ((WindowImpl)parent),
dialog is OpenFileDialog
? FileChooserAction.Open
: FileChooserAction.Save,
"Cancel", ResponseType.Cancel,
"Open", ResponseType.Accept)
{
SelectMultiple = (dialog as OpenFileDialog)?.AllowMultiple ?? false,
};
foreach (var filter in dialog.Filters)
{
var ffilter = new FileFilter()
{
Name = filter.Name + " (" + string.Join(";", filter.Extensions.Select(e => "*." + e)) + ")"
};
foreach (var ext in filter.Extensions)
ffilter.AddPattern("*." + ext);
dlg.AddFilter(ffilter);
}
dlg.SetFilename(dialog.InitialFileName);
dlg.Modal = true;
dlg.Response += (_, args) =>
{
if (args.ResponseId == ResponseType.Accept)
tcs.TrySetResult(dlg.Filenames);
dlg.Hide();
dlg.Dispose();
};
dlg.Close += delegate
{
tcs.TrySetResult(null);
dlg.Dispose();
};
dlg.Show();
return tcs.Task;
}
public unsafe Task<string[]> ShowFileDialogAsync(FileDialog dialog, IWindowImpl parent)
{
var hWnd = parent?.Handle?.Handle ?? IntPtr.Zero;
return Task.Factory.StartNew(() =>
{
var filters = new StringBuilder();
foreach (var filter in dialog.Filters)
{
var extMask = string.Join(";", filter.Extensions.Select(e => "*." + e));
filters.Append(filter.Name);
filters.Append(" (");
filters.Append(extMask);
filters.Append(")");
filters.Append('\0');
filters.Append(extMask);
filters.Append('\0');
}
if (filters.Length == 0)
filters.Append("All files\0*.*\0");
filters.Append('\0');
var filterBuffer = new char[filters.Length];
filters.CopyTo(0, filterBuffer, 0, filterBuffer.Length);
var defExt = (dialog as SaveFileDialog)?.DefaultExtension;
var fileBuffer = new char[256];
dialog.InitialFileName?.CopyTo(0, fileBuffer, 0, dialog.InitialFileName.Length);
string userSelectedExt = null;
fixed (char* pFileBuffer = fileBuffer)
fixed (char* pFilterBuffer = filterBuffer)
fixed (char* pDefExt = defExt)
fixed (char* pInitDir = dialog.InitialDirectory)
fixed (char* pTitle = dialog.Title)
{
var ofn = new UnmanagedMethods.OpenFileName()
{
hwndOwner = hWnd,
hInstance = IntPtr.Zero,
lCustData = IntPtr.Zero,
nFilterIndex = 0,
Flags =
UnmanagedMethods.OpenFileNameFlags.OFN_EXPLORER |
UnmanagedMethods.OpenFileNameFlags.OFN_HIDEREADONLY,
nMaxCustFilter = 0,
nMaxFile = fileBuffer.Length - 1,
nMaxFileTitle = 0,
lpTemplateName = IntPtr.Zero,
lpfnHook = IntPtr.Zero,
lpstrCustomFilter = IntPtr.Zero,
lpstrDefExt = new IntPtr(pDefExt),
lpstrFile = new IntPtr(pFileBuffer),
lpstrFileTitle = IntPtr.Zero,
lpstrFilter = new IntPtr(pFilterBuffer),
lpstrInitialDir = new IntPtr(pInitDir),
lpstrTitle = new IntPtr(pTitle),
};
ofn.lStructSize = Marshal.SizeOf(ofn);
if ((dialog as OpenFileDialog)?.AllowMultiple == true)
ofn.Flags |= UnmanagedMethods.OpenFileNameFlags.OFN_ALLOWMULTISELECT;
if (dialog is SaveFileDialog)
ofn.Flags |= UnmanagedMethods.OpenFileNameFlags.OFN_NOREADONLYRETURN |
UnmanagedMethods.OpenFileNameFlags.OFN_OVERWRITEPROMPT;
var pofn = &ofn;
var res = dialog is OpenFileDialog
? UnmanagedMethods.GetOpenFileName(new IntPtr(pofn))
: UnmanagedMethods.GetSaveFileName(new IntPtr(pofn));
if (!res)
return null;
if (dialog?.Filters.Count > 0)
userSelectedExt = dialog.Filters[ofn.nFilterIndex - 1].Extensions.FirstOrDefault();
}
var cStart = 0;
string dir = null;
var files = new List<string>();
for (var c = 0; c < fileBuffer.Length; c++)
{
if (fileBuffer[c] == 0)
{
//Encountered double zero char
if (cStart == c)
break;
var s = new string(fileBuffer, cStart, c - cStart);
if (dir == null)
dir = s;
else
files.Add(s);
cStart = c + 1;
}
}
if (files.Count == 0)
{
if (dialog is SaveFileDialog)
{
if (string.IsNullOrWhiteSpace(Path.GetExtension(dir)) &&
!string.IsNullOrWhiteSpace(userSelectedExt) &&
!userSelectedExt.Contains("*"))
dir = Path.ChangeExtension(dir, userSelectedExt);
}
return new[] {dir};
}
return files.Select(f => Path.Combine(dir, f)).ToArray();
});
}
public Task<string[]> ShowFileDialogAsync(FileDialog dialog, IWindowImpl parent)
{
throw new NotImplementedException();
}