how to prevent textbrowser from being modified?

chaochao

Now,i use textbrowser as central wigdet and use function insertplaintext to display on textbrowser.If i do not click the textbrowser,insertplaintext can inset at the last .but if i click it,insertplaintext will inset from my clicked position. What i want is that insertplaintext is always at the last positon. how to do that? thank for your help.

jsulm

@chaochao What about http://doc.qt.io/qt-5/qtextedit.html#append ?

raven-worx

@chaochao

QTextCursor c( textEdit->document() );
c.movePosition( QTextCursor::End );
c.insertBlock();
c.insertText( ... );

chaochao

@jsulm can not use append.i dont know why。append will display wrong like this.

append:

a
d
c data :2
.50,

a
d
c data :2
.50,
insertPlainText:
adc data :2.50,
adc data :2.50

chaochao

@raven-worx no ,it will display err like when i use append.
QByteArray data = _serial->readAll();
this is my data to be diplayed on textbrowser.

raven-worx

@chaochao
to make it clear.

You get this:

a
d
c data :2
.50,

a
d
c data :2
.50,

but want it to display like this?

adc data :2.50,
adc data :2.50

If this is the case the question is when you are doing the call to readAll() and append it.

Since it seems you are reading from a serial device, i guess you are just calling it whenever new data is available. Every call to append creates a new paragraph. So if your received data just contains a single character and append it you get this.