Qt-Resizing window

Hii,
I was trying to write a code through Qt creator. On a click of a button, a
label simply disappears. I was able to disappear the label but I could not
resize the window. Instead, the layouts in the window managed to get the
button to the center of the window.
Is there a direct method/slot to resize the window?

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Thanks & Regards,
Keval Vora.


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