private bool CanChangeFile()
{
RequestFileChangeResult r = this.displayControls.CanUpdatePicture();
if (r == RequestFileChangeResult.DoNotClose)
{
return(false);
}
if (r == RequestFileChangeResult.CloseAndSave)
{
this.displayControls.CurrentPicture.SaveChanges();
}
return(true);
}
public RequestFileChangeResult CanUpdatePicture()
{
int countDoNotClose = 0;
int countCloseAndSave = 0;
int countClose = 0;
foreach (IPictureDetailControllerBase c in this)
{
RequestFileChangeResult r = c.RequestFileChange();
switch (r)
{
case RequestFileChangeResult.Close:
countClose++;
break;
case RequestFileChangeResult.CloseAndSave:
countCloseAndSave++;
break;
case RequestFileChangeResult.DoNotClose:
countDoNotClose++;
break;
}
}
int count = this.Count;
// one say dont close
if (countDoNotClose > 0)
{
return(RequestFileChangeResult.DoNotClose);
}
// all say close
if (countClose == count)
{
return(RequestFileChangeResult.Close);
}
// none say dont close and one or more say save
return(RequestFileChangeResult.CloseAndSave);
}
