Developing an efficient and robust lightweight graphic user interface (GUI) for industry process monitoring is always a
challenging task. Current implementation methods for embedded GUI are with the matters of real-time processing and ergonomics
performance. To address the issue, an embedded lightweight GUI component library design method based on quasar technology
embedded (Qt/E) is proposed. First, an entity-relationship (E-R) model for the GUI library is developed to define the functional
framework and data coupling relations. Second, a cross-compilation environment is constructed, and the Qt/E shared library files
are tailored to satisfy the requirements of embedded target systems. Third, by using the signal-slot communication interfaces, a
message mapping mechanism that does not require a call-back pointer is developed, and the context switching performance is
improved. According to the multi-thread method, the parallel task processing capabilities for data collection, calculation, and
display  are  enhanced,  and  the  real-time  performance  and  robustness  are  guaranteed.  Finally,  the  human-computer  interaction
process  is  optimized  by  a  scrolling  page  method,  and  the  ergonomics  performance  is  verified  by  the  industrial  psychology
methods. Two numerical cases and five industrial experiments show that the proposed method can increase real-time read-write
correction ratios by more than 26% and 29%, compared with Windows-CE-GUI and Android-GUI, respectively. The component
library can be tailored to 900 KB and supports 12 hardware platforms. The average session switch time can be controlled within
0.6 s and six key indexes for ergonomics are verified by different industrial applications.

关键词： Embedded lightweight graphic user interface (GUI),  Quasar technology embedded (Qt/E),  Industry process moni-
toring,  Multi-thread,  Ergonomics performance