Hi everyone,
I just downloaded Squeak two days ago, so far I love it. I want to use it to teach my little sister how to program. But first I need some help figuring out the basics.
How do I refer to objects I create?
If I create, for example, an EllipseMorph how can I refer to it in a Workspace, so I can send it messages using "do it"? I've figured out how to open a Viewer and change the object's name, but if I try to send it a message in a Workspace I get an "Unknown variable" error.
Thanks,
Eddie
Hi Eddie,
Try this
myEllipse := EllipseMorph new. myEllipse openInWorld. myEllipse color: Color blue
and you can continue sending messages to myEllipse and watching the results.
Hope this helps.
Regards,
Francisco
El vie, 17-02-2006 a las 10:42 -0700, Eddie Hillenbrand escribió:
Hi everyone,
I just downloaded Squeak two days ago, so far I love it. I want to use it to teach my little sister how to program. But first I need some help figuring out the basics.
How do I refer to objects I create?
If I create, for example, an EllipseMorph how can I refer to it in a Workspace, so I can send it messages using "do it"? I've figured out how to open a Viewer and change the object's name, but if I try to send it a message in a Workspace I get an "Unknown variable" error.
Thanks,
Eddie
On 2/17/06, Francisco A. Lizarralde st.easy.rider@gmail.com wrote:
myEllipse := EllipseMorph new. myEllipse openInWorld. myEllipse color: Color blue
My next question was going to be "how can I make a morph programatically." Thanks.
Eddie,
myEllipse := EllipseMorph new. myEllipse openInWorld. myEllipse color: Color blue
My next question was going to be "how can I make a morph programatically." Thanks.
Not quite sure what you mean by "programatically", because the above code creates an EllipseMorph programatically.
In tile scripting, the "copy" tile makes a copy of receiver. You need to assign the result into a property or use it as an argument ofor a command (or such).
-- Yoshiki
On 2/21/06, Yoshiki Ohshima yoshiki@squeakland.org wrote:
myEllipse := EllipseMorph new. myEllipse openInWorld. myEllipse color: Color blue
My next question was going to be "how can I make a morph programatically." Thanks.
Not quite sure what you mean by "programatically", because the above code creates an EllipseMorph programatically.
I only meant that he answered a question I was planning on asking before asked it.
Eddie Hillenbrand wrote:
Hi everyone,
I just downloaded Squeak two days ago, so far I love it. I want to use it to teach my little sister how to program. But first I need some help figuring out the basics.
How do I refer to objects I create?
If I create, for example, an EllipseMorph how can I refer to it in a Workspace, so I can send it messages using "do it"? I've figured out how to open a Viewer and change the object's name, but if I try to send it a message in a Workspace I get an "Unknown variable" error.
You can create the EllipseMorph from the workspace and then you have a reference to it:
e := EllipseMorph new openInWorld. <Alt-D> e<Alt-P> an EllipseMorph(1873)
Then the variable "e" refers to the new ellipse.
The World morph is the "root" of all the morphs you see on the screen. You can ask it for one of its children by name (the name you entered in the viewer):
e := World submorphNamed: 'BigEllipse'. <Alt-D> e<Alt-P> an EllipseMorph(1873)
(<Alt-P> of course means to press Alt-P to Print It)
You can also ask any class for all of its instances, which will return a collection of them:
EllipseMorph allInstances
However on my squeak this returns 83 separate EllipseMorphs, probably not what you're looking for.
Joe Koberg joe@osoft.us
Eddie,
I just downloaded Squeak two days ago, so far I love it. I want to use it to teach my little sister how to program. But first I need some help figuring out the basics.
How do I refer to objects I create?
If I create, for example, an EllipseMorph how can I refer to it in a Workspace, so I can send it messages using "do it"? I've figured out how to open a Viewer and change the object's name, but if I try to send it a message in a Workspace I get an "Unknown variable" error.
How old is your sister? You (she) may be able to do what she wants just all with tile scripting.
By the way, In the menu (accessible from the button on the left in the title bar) of a Workspace, there is a checkbox called "create textual reference to dropped morphs". If you check it on, you can drop a Morph onto the Workspace and get a variable definition for it.
-- Yoshiki
On 2/17/06, Yoshiki Ohshima yoshiki@squeakland.org wrote:
How old is your sister? You (she) may be able to do what she wants just all with tile scripting.
She's eleven and quite advanced for her age. She skipped ahead to 7th grade this year and still manages nearly straight A's. Consequently she's gone from pre-algebra to algebra in one swift step. She's having trouble breaking the equations into small steps and doing them sequentially. I think teaching her some basic programming will be a fun way to help her.
I think I'll start with tile scripting and if she shows interest I'll begin showing her how to write the actual code. At the very least I want her to learn sequence, selection and repetition.
By the way, In the menu (accessible from the button on the left in the title bar) of a Workspace, there is a checkbox called "create textual reference to dropped morphs". If you check it on, you can drop a Morph onto the Workspace and get a variable definition for it.
That works great thanks.
Eddie,
How old is your sister? You (she) may be able to do what she wants just all with tile scripting.
She's eleven and quite advanced for her age. She skipped ahead to 7th grade this year and still manages nearly straight A's. Consequently she's gone from pre-algebra to algebra in one swift step. She's having trouble breaking the equations into small steps and doing them sequentially. I think teaching her some basic programming will be a fun way to help her.
I think I'll start with tile scripting and if she shows interest I'll begin showing her how to write the actual code. At the very least I want her to learn sequence, selection and repetition.
Sounds like a good idea. EToys' expressive power is indeed limited, but you can do pretty impressive things in eToys, definitely more than a programmer in a typical language would imagine from the first look how much it can.
The Holder can hold many objects and has a cursor. So these are good basis for the sequence. The "ticking" does provide basic repetition. If you put a small differential in a script and tick it, you can effectively integrate the differentials. This is pretty powerful idea.
You might want to join squeakland mailing list for more discussions on the tile programming in eToys.
http://squeakland.org/mailman/listinfo/squeakland
-- Yoshiki
On 2/21/06, Yoshiki Ohshima yoshiki@squeakland.org wrote:
You might want to join squeakland mailing list for more discussions on the tile programming in eToys.
I joined the list. Thank you, and thanks everyone else, for all the friendly help.
Eddie Hillenbrand wrote:
Hi everyone,
I just downloaded Squeak two days ago, so far I love it. I want to use it to teach my little sister how to program. But first I need some help figuring out the basics.
If you are preparing to teach someone then make sure she/he will have fun or else there is much chance to bore her/him.
You can use E-Toys / User Scripting. You can create your morphs using the 'Supplies' drawer or painting one yourself. Then just select it and open it's halos (http://minnow.cc.gatech.edu/squeak/3546). Click on the one with a little eye (open a Viewer for me). From here on you can start building scripts for your morph.
Here are some good starting points: http://www.squeakland.org/school/drive_a_car/html/Drivecar12.html http://squeakland.org/whatis/tutorials.html
Of course there is also the old boring way of instances, references, message selectors, variables etc.
Good luck !
How do I refer to objects I create?
If I create, for example, an EllipseMorph how can I refer to it in a Workspace, so I can send it messages using "do it"? I've figured out how to open a Viewer and change the object's name, but if I try to send it a message in a Workspace I get an "Unknown variable" error.
Thanks,
Eddie
Hi
Have a look at http://smallwiki.unibe.ch/botsinc/ this is an environment exactly done for that on top of squeak :)....
Stef
On 17 févr. 06, at 18:42, Eddie Hillenbrand wrote:
Hi everyone,
I just downloaded Squeak two days ago, so far I love it. I want to use it to teach my little sister how to program. But first I need some help figuring out the basics.
How do I refer to objects I create?
If I create, for example, an EllipseMorph how can I refer to it in a Workspace, so I can send it messages using "do it"? I've figured out how to open a Viewer and change the object's name, but if I try to send it a message in a Workspace I get an "Unknown variable" error.
Thanks,
Eddie
squeak-dev@lists.squeakfoundation.org
-
Corneanu Dan -
Eddie Hillenbrand -
Francisco A. Lizarralde -
Joe Koberg -
stéphane ducasse -
Yoshiki Ohshima