To Stop execution of blockly code

[prashant...@gmail.com]

Hi 

i am using eval to execute custom blocks and wanted to know that how can i stop execution of blockly code on a button click.

please provide me some reference or solution regarding my query.

thanks,

prashant

[Beka Westberg]

Hi prashant,

As far as I know there's no simple way to do this with eval, but luckily there is still a solution! You're going to want to take a look at the JS Interpreter.

So what you're going to do will depend a bit on whether you want to /stop/ execution or /pause/ execution.

1. Run the code on a timeout, either like this where it runs each "step" on a timeout, or like this where it waits until it hits an async call within the code (demo), and then waits for a timeout.

2a. If you want to simply /stop/ the code execution (so if someone were to hit play again it would start from the beginning) I believe all you need to do is reset the interpreter and it should stop.

2b. If you want to /pause/ the code execution (if someone were to hit play again it would start from where it was paused) you'll need to reset & serialize/deserialize the interpreter (demo, docs).

This is a good reference for doing the asyncronous execution (demo).

It can be tricky, but the interpreter is really cool once you get it set up!

Beka