c++ - Cannot modify height value from QRect -


the follow snippet results in compilation yielding "error: passing 'const qrect' 'this' argument of 'void qrect::setheight(int)' discards qualifiers [-fpermissive]".

how can fix , i've noticed if replace h -= 80; h--;, compiler not complain.

int h = this->geometry().height(); h -= 80; ui->datumtable->geometry().setheight(h);

geometry() returns const reference qrect object inside qtablewidget.

it's meant read-only getter. should take copy, modify , set setgeometry setter function:

qrect rect = this->geometry(); int h = rect.height(); rect.setheight(h - 80); ui->datumtable->setgeometry(rect);

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