public Task<string> ShowFolderDialogAsync(OpenFolderDialog dialog, IWindowImpl parent)
{
var tcs = new TaskCompletionSource<string>();
var dlg = new global::Gtk.FileChooserDialog(dialog.Title, ((WindowImpl)parent),
FileChooserAction.SelectFolder,
"Cancel", ResponseType.Cancel,
"Select Folder", ResponseType.Accept)
{
};
dlg.Modal = true;
dlg.Response += (_, args) =>
{
if (args.ResponseId == ResponseType.Accept)
tcs.TrySetResult(dlg.Filename);
dlg.Hide();
dlg.Dispose();
};
dlg.Close += delegate
{
tcs.TrySetResult(null);
dlg.Dispose();
};
dlg.Show();
return tcs.Task;
}
public MainWindowViewModel()
{
Items = new List<TestItem>();
for (int i = 0; i < 10; ++i)
{
Items.Add(new TestItem($"Item {i}", $"Item {i} Value"));
}
Nodes = new List<TestNode>
{
new TestNode
{
Header = "Root",
SubHeader = "Root Item",
IsExpanded = true,
Children = new[]
{
new TestNode
{
Header = "Child 1",
SubHeader = "Child 1 Value",
},
new TestNode
{
Header = "Child 2",
SubHeader = "Child 2 Value",
IsExpanded = false,
Children = new[]
{
new TestNode
{
Header = "Grandchild",
SubHeader = "Grandchild Value",
},
new TestNode
{
Header = "Grandmaster Flash",
SubHeader = "White Lines",
},
}
},
}
}
};
CollapseNodesCommand = ReactiveCommand.Create();
CollapseNodesCommand.Subscribe(_ => ExpandNodes(false));
ExpandNodesCommand = ReactiveCommand.Create();
ExpandNodesCommand.Subscribe(_ => ExpandNodes(true));
OpenFileCommand = ReactiveCommand.Create();
OpenFileCommand.Subscribe(_ =>
{
var ofd = new OpenFileDialog();
ofd.ShowAsync();
});
OpenFolderCommand = ReactiveCommand.Create();
OpenFolderCommand.Subscribe(_ =>
{
var ofd = new OpenFolderDialog();
ofd.ShowAsync();
});
}
public Task<string> ShowFolderDialogAsync(OpenFolderDialog dialog, IWindowImpl parent)
{
throw new NotImplementedException();
}
public Task<string> ShowFolderDialogAsync(OpenFolderDialog dialog, IWindowImpl parent)
{
return Task.Factory.StartNew(() =>
{
string result = string.Empty;
var hWnd = parent?.Handle?.Handle ?? IntPtr.Zero;
var frm = (IFileDialog)(new UnmanagedMethods.FileOpenDialogRCW());
uint options;
frm.GetOptions(out options);
options |= (uint)(UnmanagedMethods.FOS.FOS_PICKFOLDERS | UnmanagedMethods.FOS.FOS_FORCEFILESYSTEM | UnmanagedMethods.FOS.FOS_NOVALIDATE | UnmanagedMethods.FOS.FOS_NOTESTFILECREATE | UnmanagedMethods.FOS.FOS_DONTADDTORECENT);
frm.SetOptions(options);
if (dialog.InitialDirectory != null)
{
IShellItem directoryShellItem;
var riid = new Guid("43826D1E-E718-42EE-BC55-A1E261C37BFE"); //IShellItem
if (UnmanagedMethods.SHCreateItemFromParsingName(dialog.InitialDirectory, IntPtr.Zero, ref riid, out directoryShellItem) == (uint)UnmanagedMethods.HRESULT.S_OK)
{
frm.SetFolder(directoryShellItem);
}
}
if (dialog.DefaultDirectory != null)
{
IShellItem directoryShellItem;
var riid = new Guid("43826D1E-E718-42EE-BC55-A1E261C37BFE"); //IShellItem
if (UnmanagedMethods.SHCreateItemFromParsingName(dialog.DefaultDirectory, IntPtr.Zero, ref riid, out directoryShellItem) == (uint)UnmanagedMethods.HRESULT.S_OK)
{
frm.SetDefaultFolder(directoryShellItem);
}
}
if (frm.Show(hWnd) == (uint)UnmanagedMethods.HRESULT.S_OK)
{
IShellItem shellItem;
if (frm.GetResult(out shellItem) == (uint)UnmanagedMethods.HRESULT.S_OK)
{
IntPtr pszString;
if (shellItem.GetDisplayName(UnmanagedMethods.SIGDN_FILESYSPATH, out pszString) == (uint)UnmanagedMethods.HRESULT.S_OK)
{
if (pszString != IntPtr.Zero)
{
try
{
result = Marshal.PtrToStringAuto(pszString);
}
finally
{
Marshal.FreeCoTaskMem(pszString);
}
}
}
}
}
return result;
});
}