c++ - How to remove this space(margin) from a QWidget form -

c++ - How to remove this space(margin) from a QWidget form -

i have qwidget form, have added qtextedit on form, there space(margin) in top.

i tried utilize following:

qwidget *widget = new qwidget(this); widget->layout()->setcontentsmargins(0,0,0,0);

but unfortunately, did not want.

how remove space(margin) left, right , down side ?

full code

qwidget *widget = new qwidget(this); qtextedit *textedit = new qtextedit(widget); qmdisubwindow *mdiwindows = ui->mdiarea->addsubwindow(widget); mdiwindows->setgeometry(5, 5, 300, 250); mdiwindows->setwindowtitle(finfo.basename()); mdiwindows->setwindowstate(qt::windowmaximized); mdiwindows->layout()->addwidget(textedit); mdiwindows->layout()->setcontentsmargins(0,0,0,0); textedit->settext(cache); widget->setmaximumheight(0); mdiwindows->show();

try addding

widget->layout()->setspacing(0);

c++ qt margin qt5