Scratch

can u post the full blockspec and code?

csn wrote:

Thank you for your reply. Here is part of the code:

In Scratch-Objects | ScratchSpriteMorph | block specs | blockspecs

blockSpecs

| blocks |

('NXT' = objName )
    ifTrue: [
        blocks _ #(
            'motion'
                ('control NXT motion'            -    nxtControl)
                ('start turning %o %O'            -    nxtStartM:d: L forward)
        ).
    ].


The problem is: objName is not known in "block specs"
"block specs" is a class of ScratchSpriteMorph and objName is defined as a variable for instances in ScratchSpriteMorph.

But to be honest, I don't know the difference. I'm just look at other instances an try to figure out my new blocks by looking at other blocks.

cns

hmmm... sorry but i am not really good at squeak... u might have to wait until someone better than me answers this 

I figured it out for instances but don't ask for explanation:

    t1 <- #NXT.
    t2 <- objName asSymbol.
t1 = t2   
ifFalse: [...]
ifTrue: [...].

Now the value of t1 = t2 is True.

But the problem I started with remains. In Scratch-Objects | ScratchSpriteMorph | block specs | blockspecs >objName< is unknown.

Does anybody know how to change it?

bbbeb wrote:

It's an instance variable, not a class variable. 

Ok. the real question is:

Can I get the sprites name as a class variable?

csn

Unfortunately your work goes beyond the ScratchSpriteMorph class.

You need to trace back to the method that creates all the blocks, and there you can add a condition for the objName (since the method I'm talking about is a ScriptableScratchMorph which has objName defined as an instance var).

csn wrote:

LS97 wrote:

You need to trace back to the method that creates all the blocks, and there you can add a condition for the objName (since the method I'm talking about is a ScriptableScratchMorph which has objName defined as an instance var).

But objName is still an instance var and I can't use it in the class part of ScriptableScratchMorph either. The blockspecs are defined in the class part.

I can use objName in ScriptableSpriteMorph in instances, I tried it. I think this is because ScriptableSpriteMorph seems to be a subclass of ScriptableScratchMorph.

But I'm just sort of guessing, there is no deeper knowledge.
csn

You're right about not being able to access objName from the class method of ScriptableScratchMorph, because it's instance. But what I meant is looking at the method that creates the blocks -- and that's an instance method.

EDIT
Maybe I wasn't clear enough. The various blockSpecs methods are simply lists of blocks, they are not methods. They are then used by the block creating method as a list to reference!

Last edited by LS97 (2011-10-18 11:28:14)

And the color is set in ScriptableScratchMorph | block specs | blockColorFor:

csn