一些QT编写的简单程序，基于槽和信号做的，包括象棋等，注释很详细。很经典-QT prepared some simple procedures, based on slot and signal to do, including chess, very detailed notes. Very classic

俄罗斯方块 用Qt做显示界面 信号与槽函数-Tetris The use of Qt in display interface Signals and slots function