[Newbies] I am a total beginner with some questions

[kennellgr]

I typed in the code for the key press and printed it and recieved an error.
this is a screen shot of this:

http://www.nabble.com/file/p16735583/Squeak%2Berror%2B4.jpg 

A second question. How do I make a method to continuously check for this key
press. If I have a morph class how do I create a method within it that says
"while this morph exists check for this key being pressed and do something
if it is pressed"?


kennellgr wrote:
> 
> Hi,
> 
> I appreciate the help. I tried it out and it works. I have one problem
> though. I created a method called "gdkDKeyDown" (gdk is my innitials so I
> put it before my methods) and when I type gdkDKeyDown in a workspace and
> print it it says nil (it's supposed to say true or false) how do I make it
> return a value?
> 
> This is the method:
> 
> 
> gdkDKeyDown
> 	| x |
> 	x := Sensor keyboardPeek asciiValue.
> 	x == 99
> 		ifTrue: [^ true].
> 	^ false
> 
> 
> 
> Marcus Strehlow wrote:
>> 
>> Hi there,
>> 
>> As mentioned before, your class would have to inherit the method
>> handleKeytroke:, keyStroke: and keyDown: inside which you then decide
>> what
>> should be done. However, in order to find out which key has been pressed,
>> you will have to find out the corresponding ASCII code, and then check if
>> the pressed ASCII code is the same as the one you want to monitor.
>> 
>> x := Sensor keyboardPeek asciiValue.
>> (x == 99) "99 is the ascii value for the letter c"
>> ifTrue: [Transcript show: 'letter c was pressed'; cr].
>> 
>> If this is implemented in the keyDown: method, everytime the c key is
>> pressed, the Transcript should show the text specified.
>> 
>> You can find the ASCII values for each key on www.asciitable.com . In the
>> image on the page, the ASCII value is the one in the Dec column.
>> 
>> Displaying an image is fairly easy, as long as Squeak supports the
>> format.
>> Current supported formats are GIF, JPG, PNG and BMP if I remember
>> correctly.
>> To use an image inside any morph or in the world, use this:
>> 
>> x := ImageMorph new.
>> x image: (Form fromFileNamed: 'path/to/your/image.jpg').
>> x openInWorld.
>> 
>> This will load the specified file, create the necessary form, and is then
>> opened in your current world.
>> 
>> I hope this helps a bit,
>> 
>> Marcus
>> 
>> 
>> 
>>> Message: 1
>>> Date: Mon, 7 Apr 2008 14:44:32 -0700 (PDT)
>>> From: kennellgr <cboneg5 at gmail.com>
>>> Subject: [Newbies] I am a total beginner with some questions
>>> To: beginners at lists.squeakfoundation.org
>>> Message-ID: <16540965.post at talk.nabble.com>
>>> Content-Type: text/plain; charset=us-ascii
>> 
>> 
>>> I really like programming (I've done some in C) and I decided I wanted
>>> to
>> try
>>> doing some programming on my Mac. I spent hours online trying to find
>>> something that I could learn and settled on Squeak. I have it and barely
>>> understand the basics of it.
>> 
>>> A few Questions:
>> 
>>> 1. What do I do to test whether or not a key has been pressed (in a
>>> method
>> I
>>> want it to say 'if C key is pressed down do this')
>> 
>>> 2. What do I do to display a picture that I have on my computer?
>> 
>> -- 
>> iMac -- 20 inch -- Core 2, 2 GHz -- 1 GB RAM -- Superdrive -- Mac OS X
>> Leopard 10.5.2
>> MacBook -- 13.3 inch -- Core 2, 1.83 GHz -- 1.5 GB RAM -- Combodrive --
>> Mac
>> OS X Leopard 10.5.2
>> iMac G5 -- 17 inch -- PPC G5 1.8 GHz -- 1 GB RAM -- Superdrive -- Mac OS
>> X
>> Leopard 10.5.2
>> iPod touch -- 16 GB -- Software Upgrade -- iPhone OS 1.1.4
>> 
>> _______________________________________________
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>> Beginners at lists.squeakfoundation.org
>> http://lists.squeakfoundation.org/mailman/listinfo/beginners
>> 
>> 
> 
> 

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