Hello Vipar,
If you are looking for a simple button click and hold that you can apply to the screen I have an example that you can try. This example may be viable depending on your needs, if I understood what it was that you are looking for. I hope that this information helps.
Example:
I have created a new widget blueprint and I have simply added a button to the designer tab. I then created an OnPressed and an OnReleased event for this button. From there I used a gate to open and close a loop that runs as long as the button is held down. The print string in the example is where you would run the desired function. The delay can be altered to fine tune how quickly you would like the button to repeatedly fire off while the button is down.
Make it a great day