void OnHistoryDestroyed(object sender, EventArgs e)
{
historyWindow = null;
logger.Debug("History Destroyed");
}
protected void OnButtonHistoryClicked(object sender, EventArgs e)
{
if(historyWindow == null)
{
historyWindow = new ChatHistory();
historyWindow.Destroyed += OnHistoryDestroyed;
historyWindow.Show();
}
else
{
historyWindow.Present();
}
}