MainWindow 0 0 366 577 MainWindow false 300 480 61 32 Send false 10 41 351 431 0 0 10 10 271 21 Your nick name 290 7 61 30 login 10 485 281 21 0 0 366 22 TopToolBarArea false loginBtn clicked() MainWindow LoginClicked() 334 52 360 44 messageEdit returnPressed() MainWindow OnMessageReturn() 116 524 30 545 sendBtn clicked() MainWindow SendBtnClicked() 307 531 269 545 SendBtnClicked(bool) TypingChanged() LoginClicked() OnMessageReturn() SendBtnClicked()