How to place QSlider inside and QPushButton above the widget area

[Cucumber]

Hello there,

The default position of QSlider is to the right of the widget.
I would like to

• to place my slider inside the widget and
• to make the groove transparent.

Below given an example:



The second question is pretty much the same. I would like to place QPushButton (and some other widgets like QLabel and QCheckBox) above the QTextEdit. Below is an example:


How can I make it?
I would really appreciate any help on those questions. Thanks in advance!