Question

I have a text (with several lines) that I need to put in a wxPython TextCtrl.
The problem is that some of these lines are with unprintable characters.

My solution to that was to use AppendText, and try-catch the problematic line.

The current problem is that for a large number of lines it takes a lot of time (relative to preparing a large string with all the lines and using SetValue)

Is there a way to append lines of text to TextCtrl “silently” (so it will not redraw after each line)?

Answer 1

Since wxTextCtrl derives from wxWindow, it inherits its Freeze() and Thaw() methods.

Freeze() will lock screen updates for the control, and Thaw() will re-enable them. The documentation actually mentions your very use case, albeit with a caveat:

This method is useful for visual appearance optimization (for example,
it is a good idea to use it before doing many large text insertions in
a row into a wxTextCtrl under wxGTK) but is not implemented on all
platforms nor for all controls so it is mostly just a hint to
wxWidgets and not a mandatory directive.