CODEWITHSUNDEEP
c++qtqrect
johnsonwi
johnsonwi

Reputation: 159

Cannot modify height value from QRect

The follow snippet results in my compilation yielding "error: passing 'const QRect' as 'this' argument of 'void QRect::setHeight(int)' discards qualifiers [-fpermissive]".

How can I fix this and also I've noticed that if I were to replace h -= 80; with h--;, the compiler does not complain.

int h = this->geometry().height();
h -= 80;
ui->datumTable->geometry().setHeight(h);

Upvotes: 1

Views: 991

Answers (3)

Alex B
Alex B

Reputation: 84972

geometry() returns a const reference to a QRect object inside QTableWidget.

It's meant to be a read-only getter. You should take a copy, modify it and set it back with setGeometry setter function:

QRect rect = this->geometry();
int h = rect.height();
rect.setHeight(h - 80);
ui->datumTable->setGeometry(rect);

Upvotes: 2

Dan Milburn
Dan Milburn

Reputation: 5738

QRect g = this->geometry().height();
g.setHeight(g.height()-80);
ui->datumTable->setGeometry(g);

Upvotes: 1

Mats Petersson
Mats Petersson

Reputation: 129524

It would seem that geometry() in datumTable returns a const QRect. Not an easy fix unless there is a non-const version as well.

Upvotes: 0

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