Python Pyqt5 Login code and user registration complete code with mysql database using qt designer

Hi, I am doing my project in Pyqt4 and it is a text editor some problems that can you help me fix this problem is my dream project I spent two and half years for this please help me, please I have
my text editor is advanced level than notepad my text editor as a photo editing feature totally I have 5 problems to fix hear I attach a video of a problem it's too difficult to explain in E_mail this is my portfolio project and I have spent three years to develop this project so it's my dream