[Newbies] isStepping question

[Christine Wolfe]

Wow! That worked.  But I'm sorry to hear that morph doesn't support a loop
like I wanted.  That sounds restrictive but maybe I just need more time in
world to become squeakified.

Thank you SO MUCH

-----Original Message-----
From: beginners-bounces at lists.squeakfoundation.org
[mailto:beginners-bounces at lists.squeakfoundation.org] On Behalf Of Bert
Freudenberg
Sent: Saturday, November 07, 2009 8:30 AM
To: A friendly place to get answers to even the most basic questions about
Squeak.
Subject: Re: [Newbies] isStepping question


On 07.11.2009, at 14:18, Christine Wolfe wrote:

> If I have a morph that is stepping through some process I know I can  
> test for whether or not it is still stepping by using the isStepping  
> method.  But, how to I put this into a loop so that the next  
> instruction doesn't start until the stepping is done.
>
> Here is my mouseDown code.  I want to put something in before the  
> last instruction so it doesn't execute until isStepping becomes false.
>
> mouseDown: evt
> path := OrderedCollection new.
> 0 to: 9 do: [:i | path add: self position + (0@(10 * i))].
> path := path, path reversed.
> self startStepping.
>
> self owner moveTheGameBall.

Not possible in Morphic (that is one of the major advantages of Tweak).

The canonical way is to test for the end condition in #step. Something  
like

step
	path ifEmpty: [^self stopStepping].
	self position: path removeFirst.
	path ifEmpty: [self owner moveTheGameBall]

- Bert -


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