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qtqtexteditg-code

What's a good way to display a lot of text in QT

I'm building an app that will read in a gcode file. Files range from a few KB to a few hundred MB (but that's rare). After a user selects a file, the program goes through it and reads it line by line. This doesn't take long at all.

I want to display the text of the file I just read in in a QTextEdit widget. Unfortuantely, doing this takes a really long time (a few seconds for even small files).

I've thought about just adding a "loading, please wait" message for the user, but I was wondering if there was a way to speed up the text loading process.

right now my code looks like this:

 QTextStream in(gcodeFile); //The file path was given by the user
 ui->textEdit->setText(in.readAll());
 in.seek(0);
 processGcode();

Is there a better way to load a lot of text into a QTextEdit that won't make the app hang?

Note: The issue is not that I'm reading through the file twice. I changed my code so that it did the processing at the same time as adding the text to the QTextEdit, but the whole thing still took too long.

Solution

  • "QPlainTextEdit is an advanced viewer/editor supporting plain text. It is optimized to handle large documents and to respond quickly to user input."

    You can see check detailed information from here.