How to use QLineEdit text events in Python

This article introduces how to use QLineEdit text events in Python, the content is very detailed, interested friends can refer to, hope to be helpful to you.

I. use of qlineEdit

QLineEdit it is a single-line text box.

Event: text change event. Textchange events for code like this.

If we want to use QLineEdit flexibly, we need to combine the basic calling mechanism of signal slot in qt.

Note: when transmitting parameters, the signal should change the parentheses to square parentheses.

2. Label QLabel

Text string type, indicated by double quotes, such as "Liu Jinyu programming".

Text type symbol types are represented by str in python

When we set qlabel new content, if there is too much content, at this time, we will not see the content beyond the tag area. At this point, we need to set the label width to adapt.

Tags in pyqt5 use qlabel

When using a tag, the default width of the label is fixed. When the content of the label text exceeds the display area of the label width, the content beyond it will be obscured. At this point, we can consider customizing the content of the tag to adapt to the region.

The area adaptation of the label uses the function adjustsize

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