Raudus components are not so straightforward as you suppose.
In you example, i see that you have a Button and an Edit. Clicking on a Button changes Edit value.
You need to create two controls – Button and Edit – separately.
It seems that i should post some code here. But i have an even better idea. In next version i will try to write minimalistic examples of the Edit and the Button.
Try to study example “80-RxStButton”. It is rather simple.