Question

I’m a newbie programmer writting a program in MonoDevelop in C# and have a porblem with my gtk MessageDialogs.

The close button on the window boarders of my GTK Message dialogues require a double click to actually close them. The close button on the dialogue its self works fine. Could someone please tell me how I can fix this below is the code:

  if (fchDestination.CurrentFolder == fchTarget.CurrentFolder) {
   MessageDialog msdSame = new MessageDialog(this, DialogFlags.Modal, MessageType.Error, ButtonsType.Close, "Destination directory cannot be the same as the target directory");
   msdSame.Title="Error";
   if ((ResponseType) msdSame.Run() == ResponseType.Close) {
    msdSame.Destroy();
   }
   return;
  }

  if (fchTarget.CurrentFolder.StartsWith(fchDestination.CurrentFolder)) {
   MessageDialog msdContains = new MessageDialog(this, DialogFlags.Modal, MessageType.Error, ButtonsType.Close, "error");
   msdContains.Title="Error";
   if ((ResponseType) msdContains.Run() == ResponseType.Close) {
    msdContains.Destroy();
   }
   return;
  }

Answer 1

The response value given when you click on a dialog’s “close window” button is not CLOSE, but DELETE_EVENT. That’s why the destroy method is never called and the dialog lingers. The second time you close it (out of the context of the run method), the dialog is destroyed normally.

In short, you also need to check for ResponseType.DeleteEvent.

Update:

In code:

MessageDialog msdSame = ...
...
ResponseType response = (ResponseType) msdSame.Run();
if (response == ResponseType.Close || response == ResponseType.DeleteEvent) {
  msdSame.Destroy();
}

Or, as ptomato mentions, you don’t need to check the response, considering the user only has one choice: “close”.

MessageDialog msdSame = ...
...
msdSame.Run();
msdSame.Destroy();