Reducing width of maintoolbar

[aaditya190]

I want to reduce the width of maintoolbar in my gui app and I have tried something like this..

ui->mainToolBar->setFixedWidth(400);

ui->mainToolBar->setFixedWidth(400);

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But still the entire toolbox is visible on the main window. Here is its image.


img1.jpg


I wish to do something like this...

img2.jpg

Can anyone help me out ??