(WindowImp::poll) : Update the canvas before processing events (WindowImp::poll, WindowImp::render) : Use the Box::NEED_REPAINT flag to minimize the number of the canvas repaints
(WindowImp::poll) : Update the canvas before processing events
(WindowImp::poll, WindowImp::render) : Use the Box::NEED_REPAINT flag to minimize the number of the canvas repaints


git-svn-id: 8c168edca3c6157a1911f01a73f2fb8eefd5ed32@3075 d15c3b8f-5b43-0410-be93-4d5a55ce2954

qbit/es-operating-system,svn2github/es-operating-system,qbit/es-operating-system,svn2github/es-operating-system,qbit/es-operating-system,qbit/es-operating-system,qbit/es-operating-system,svn2github/es-operating-system,svn2github/es-operating-system,qbit/es-operating-system,svn2github/es-operating-system,svn2github/es-operating-system,qbit/es-operating-system