<![CDATA[[SOLVED] Indent multiple lines with TAB in a QPlainTextEdit]]>Hi

I am very new to Qt and my plan is to write a little text editor for a better understanding in Qt. But I have a little problem with the indentation and the TAB key.

Is there an easy way to indent multiple (selected) lines with the tab key ? At the moment, it replaces the selected lines with a tab - example:

Current situation:
@
Line 1
Line 2
Line 3
Line 4
@

Planed:

@
<Tab>Line 1
<Tab>Line 2
<Tab>Line 3
<Tab>Line 4
@

But the default behaviour is this, because the 4 lines are replaced with a tab (because they are selected):

@
<Tab>
@

Is there a way to override this behaviour or to write an indent/outdent function ?

Greets

]]>https://forum.qt.io/topic/21236/solved-indent-multiple-lines-with-tab-in-a-qplaintexteditRSS for NodeTue, 18 Aug 2026 11:46:21 GMTFri, 09 Nov 2012 07:29:12 GMT60<![CDATA[Reply to [SOLVED] Indent multiple lines with TAB in a QPlainTextEdit on Fri, 09 Nov 2012 12:36:12 GMT]]>Okay, thank you, that's a good starting point

-PS: Is there a button to mark the thread as solved ?- Titel

]]>https://forum.qt.io/post/156468https://forum.qt.io/post/156468Fri, 09 Nov 2012 12:36:12 GMT<![CDATA[Reply to [SOLVED] Indent multiple lines with TAB in a QPlainTextEdit on Fri, 09 Nov 2012 08:19:16 GMT]]>Hello Threadcore,
You should subclass QPlainTextEdit and override following method:
@virtual void QPlainTextEdit::keyPressEvent ( QKeyEvent * e )@

Catch the tab key as described in http://doc.qt.digia.com/qt/qwidget.html#keyPressEvent
Then you should iterate through selected lines and prepend tab character ('\t').
You can obtain the selection through a QTextCursor object, which in turn you can obtain by method
@QTextCursor QPlainTextEdit::textCursor () const@

]]>https://forum.qt.io/post/156436https://forum.qt.io/post/156436Fri, 09 Nov 2012 08:19:16 GMT