mouse draw line and rect\debug\line.o
........................\.....\main.o
........................\.....\mainwindow.o
........................\.....\moc_mainwindow.cpp
........................\.....\moc_mainwindow.o
........................\.....\moc_paintwidget.cpp
........................\.....\moc_paintwidget.o
........................\.....\mouse_draw.exe
........................\.....\paintwidget.o
........................\.....\rect.o
........................\.....\shape.o
........................\line.cpp
........................\line.h
........................\main.cpp
........................\mainwindow.cpp
........................\mainwindow.h
........................\mainwindow.ui
........................\Makefile
........................\Makefile.Debug
........................\Makefile.Release
........................\mouse_draw.pro
........................\mouse_draw.pro.user
........................\paintwidget.cpp
........................\paintwidget.h
........................\rect.cpp
........................\rect.h
........................\shape.cpp
........................\shape.h
........................\ui_mainwindow.h
........................\debug
........................\release
mouse draw line and rect