Qt5.1下开发，获取屏幕鼠标所在位置以及鼠标所指的点的RGB值，Qt5.1对QPixmap::grabWindow有所改动，修正了改动的地方-Under Qt5.1 develop, acquire the RGB values ​ ​ of the screen location of the mouse and the mouse point referred, Qt5.1 for QPixmap :: grabWindow subject to change, ame