`ShowMessageBox` freeze primary window when show a message box on secondary windows

[VShawn]

`ShowMessageBox` freeze primary window when show a message box on secondary windows

[VShawn]

    var window = new InputWindow
    {
        Title = "title",
        Prompt = "Hi, test native owner window",
        Response = "",
        Result = Results.Cancel,
        ShowInTaskbar = false,
    };
    window.Owner = this;
    window.WindowStartupLocation = WindowStartupLocation.CenterOwner;
    window.ShowDialog();

this above will open a modal dialog to freeze both two window.

So using the native func ShowDialog to show a windows will freeze all of the windows.

Then I noted WindowManager.ShowMessageBox based on native ShowDialog.

That's the reason why WindowManager.ShowMessageBox freeze my two windows.

@canton7 can we make WindowManager.ShowMessageBox a same behaviour like native MessageBox.Show ?

[VShawn]

I have find a workaround for this ticket. I will make a PR for this latter.

  var mbvm = new MessageBoxViewModel();
  mbvm.Setup("Hi, test stylet message box");
  if (IoC.Get<IViewManager>().CreateAndBindViewForModelIfNecessary(mbvm) is Window window)
  {
      window.Owner = this;
      window.Loaded += (o, args) =>
      {
          var dlgWindow = o as Window;
          // dlg don't have a Owner
          if(dlgWindow?.Owner == null)
              return;
          var windows = Application.Current.Windows;
          // enable the window != Owner
          foreach (Window w in windows)
          {
              if (w == dlgWindow.Owner) continue;
              if (w is { IsLoaded: true })
              {
                  if (HwndSource.FromVisual(w) is HwndSource hwndSource)
                      EnableWindow(hwndSource.Handle, true);
              }
          }
      };
      window.WindowStartupLocation = WindowStartupLocation.CenterOwner;
      window.ShowDialog();
  }