Description: Under linux with Qt user login screen, enter your user name and password success will jump to the main window, if unsuccessful, then empty the edit box.
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File list (Check if you may need any files):
LoginApplication\LoginApplication.pro
................\LoginApplication.pro.user
................\logindialog.cpp
................\logindialog.h
................\logindialog.ui
................\main.cpp
................\mainwidget.cpp
................\mainwidget.h
................\mainwidget.ui
LoginApplication