Tkinter 8.5 reference: a GUI for Python |  |
There are lots of ways to change both the appearance and functionality of the items in a text widget. For text, you can change the font, size, and color. Also, you can make text, widgets, or embedded images respond to keyboard or mouse actions.
To control these appearance and functional features, you associate each feature with a tag. You can then associate a tag with any number of pieces of text in the widget.
The name of a tag can be any string that does not contain white space or periods.
There is one special predefined tag called
SEL. This is the region currently selected, if any.Since any character may be part of more than one tag, there is a tag stack that orders all the tags. Entries are added at the end of the tag list, and later entries have priority over earlier entries.
So, for example, if there is a character
cthat is part of two tagged regionst1andt2, andt1is deeper in the tag stack thant2, andt1wants the text to be green andt2wants it to be blue,cwill be rendered in blue becauset2has precedence overt1.You can change the ordering of tags in the tag stack.
Tags are created by using the .tag_add()
method on the text widget. See Section 24.8, “Methods on Text widgets”, below, for information on this
and related methods.