layout - Syncronize ui file with cpp on Qt -

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i writing simple app using qt. project contains ui file because easier change layouts.

well, edit cpp file add new. ui file not show it.

for example, in cpp use

qwidget *logo = new qwidget(this);     logo->setstylesheet("background-color: red");     logo->setgeometry(qrect(50,50,500,110));

but when open ui file within design mode, new red rectangle not there.

how update layout on ui file?


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