The use of qt.4.7.0 for painting rectangles, that is, the use of the mouse dynamic drawing rectangle, with a buffer painting rectangle.

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17\17
17\17.pro
17\17.pro.user
17\dialog.cpp
17\dialog.h
17\dialog.o
17\dialog.ui
17\main.cpp
17\main.o
17\Makefile
17\moc_dialog.cpp
17\moc_dialog.o
17\ui_dialog.h

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