unsafe static Task <string[]> ShowDialog(string title, GtkWindow parent, GtkFileChooserAction action,
bool multiselect, string initialFileName)
{
GtkFileChooser dlg;
parent = parent ?? GtkWindow.Null;
using (var name = new Utf8Buffer(title))
dlg = Native.GtkFileChooserDialogNew(name, parent, action, IntPtr.Zero);
if (multiselect)
{
Native.GtkFileChooserSetSelectMultiple(dlg, true);
}
Native.GtkWindowSetModal(dlg, true);
var tcs = new TaskCompletionSource <string[]>();
List <IDisposable> disposables = null;
Action dispose = () =>
{
// ReSharper disable once PossibleNullReferenceException
foreach (var d in disposables)
{
d.Dispose();
}
disposables.Clear();
};
disposables = new List <IDisposable>
{
Signal.Connect <Native.D.signal_generic>(dlg, "close", delegate
{
tcs.TrySetResult(null);
dispose();
return(false);
}),
Signal.Connect <Native.D.signal_dialog_response>(dlg, "response", (_, resp, __) =>
{
string[] result = null;
if (resp == GtkResponseType.Accept)
{
var rlst = new List <string>();
var gs = Native.GtkFileChooserGetFilenames(dlg);
var cgs = gs;
while (cgs != null)
{
if (cgs->Data != IntPtr.Zero)
{
rlst.Add(Utf8Buffer.StringFromPtr(cgs->Data));
}
cgs = cgs->Next;
}
Native.GSlistFree(gs);
result = rlst.ToArray();
}
Native.GtkWidgetHide(dlg);
dispose();
tcs.TrySetResult(result);
return(false);
}),
dlg
};
using (var open = new Utf8Buffer("Open"))
Native.GtkDialogAddButton(dlg, open, GtkResponseType.Accept);
using (var open = new Utf8Buffer("Cancel"))
Native.GtkDialogAddButton(dlg, open, GtkResponseType.Cancel);
if (initialFileName != null)
{
using (var fn = new Utf8Buffer(initialFileName))
Native.GtkFileChooserSetFilename(dlg, fn);
}
Native.GtkWindowPresent(dlg);
return(tcs.Task);
}
void Connect <T>(string name, T handler) => Disposables.Add(Signal.Connect(GtkWidget, name, handler));
public void Connect <T>(string name, T handler, IntPtr userData) => signals.Add(Signal.Connect(GtkWidget, name, handler, userData));
void ConnectEvent(string name, Native.D.signal_onevent handler) => Disposables.Add(Signal.Connect <Native.D.signal_onevent>(GtkWidget, name, handler));
public void ConnectEvent(string name, Native.D.signal_onevent handler) => signals.Add(Signal.Connect <Native.D.signal_onevent>(GtkWidget, name, handler));