Description: Qt display SVG pictures, and drag the mouse rotation, the new effect is not very good. Environment ubuntu16.04+Qt5.6.1, my new test code is available in the WIN7+Qt environment.
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File list (Check if you may need any files):
picture_rotate
..............\files
..............\.....\bubbles.svg
..............\.....\default.svg
..............\.....\heart.svg
..............\.....\spheres.svg
..............\img.qrc
..............\main.cpp
..............\picture_rotate.cpp
..............\picture_rotate.h
..............\picture_rotate.pro
..............\picture_rotate.pro.user
..............\picture_rotate.ui
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