Horizontal QSpinBox or QComboBox???

I want "Horizontal QSpinBox or QComboBox..."

For example...

<| Arial Font |>

When I click Left arrow key or Right arrow key.. the string values can be changed..
How do I implement it?
Is there some reference codes?

Thank you

One easy way would be: QToolButton+QLineEdit+QToolButton

Thank you for your response...

When I implement custom QSpinBox2 that consists of three above widgets,
Each widgets in the QSpinbox2 are focused independently.

How can I focus the QSpinbox2?

You can change focus policies for the sub-widgets.

Or perhaps you could even use focus proxies.