Description: Qt testing in a virtual keyboard program, you can set the font based on the actual situation, quite good
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File list (Check if you may need any files):
VKey\button.cpp
....\button.h
....\main.cpp
....\testdialog.cpp
....\testdialog.h
....\vkey.cpp
....\vkey.h
....\VKey.pro
VKey
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