PyQt5

When we using PyQt5 to develop a Python GUI, sometimes we have a request to store the user's settings, such as user customize the interface appearance color. If we don't save this color setting, the next time the user opens the program, the appearance color is still default.

Recently, when developing project that I am interested in, there is a demand for "click on the picture and get the pixel value". I thought this kind of demand was common, but I couldn't find any sample on the Internet. (Maybe the keywords I'm query are wrong.)

In the process of designing the interface, we may need to set up a "scrollable" area in the interface so that we can maximize the display of the information we want to display in the limited layout.

When we are developing the front-end interface, if we want to display a picture on the interface, in addition to open the directory for user to choose file, I think drag a picture to the QLabel component and display is a great way.

When we use PyQt5 to develop a graphical interface, maybe sometimes we need to save the image of QLabel component. Of course, if we proactively show a picture on QLabel, we don't need to worry about this problem. OF COURSE WE ALREADY HAVE THAT DREAM PICTURE.

I always want to try to use PyQt5 in Python to make a simple handwriting/drawing board, which can write and draw on the interface we develop at will.

Recently, when developing projects that I am interested in, there is a need to choose "colors". I wanted to build a simple color palette for the user to select the color, and then I was getting the color the user wanted.

If we want to use keyboard and mouse in our interface in PyQt5, we have to set it up. So I think recoding about these is a good idea.

The original plan about PyQt5 did not intend to write so many articles. Unexpectedly, in the process of learning, I would constantly find things that I needed to record.

The calendar component is a component often used in the development of GUI interfaces, and is often used to allow users to select different dates.