After the completion of the whole data visualization electronic billboard system with large screen interface, in order to improve the quality, it is necessary to provide several sets of default styles for users to choose, so that users can choose their favorite color scheme as the color scheme of the whole system, and go to see most large-screen electronic billboard systems on the market, which are mainly blue and some are black. It is estimated that this may be the aesthetic of the public. Then three styles of blue, dark blue and black are added to the electronic billboard system with large screen interface for data visualization, and the default purple style is added. * * * Four groups of style choices are built into the instrument. QSS of Qt is the best thing I have ever seen to control the skin change style and interface color. This tool is well used, not to mention how cool it is. It is directly QPP-> Set Style Sheet (QSS). You can skin the whole application. If the custom control defines Q_PROPERTY, it will immediately change the properties of the custom control.

Electronic kanban is a form of visual management, and the data is clear at a glance. Mainly for management projects, using various visual perception information to organize on-site production activities with intuitive images and appropriate colors. Visual management makes full use of the colors of signal lights, signs and symbols to send visual signals at the production site, which can clearly and accurately stimulate people's nerve endings, quickly transmit information, and intuitively reveal potential problems and waste phenomena. So that anyone can grasp the management status and necessary information in time, so as to quickly formulate and implement countermeasures. Therefore, management kanban is a very effective and intuitive means to find and solve problems, and it is one of the indispensable tools for excellent field management.