Hello, Young-Jin,

> I was able to achieve the goal by (1) creating a script to change the

> text of one of the text objects and (2) creating "Button to fire to

> this script". But, I don't think this method is in sprite of Squeack,

> visual programming. I want to first create a button and make this

> button change the text of one of the text objects when this button is

> clicked, not the other way around. To me, this approach is in line of

> Squeak's philosophy.

>

> Can any one please explain what I have missed?

There are a quite a few different ways.

#1:

• For the "Button" from the supplies bin, get the halo for it.
• There is a pale green/blue handle near the bottom right corner.
• You'll get the scriptor that is invoked when you click it. (You can programatically invoke the button's action by sending "fire" command in the "button" viewer category.

#2:

• For any object, you can make it a button.
• Create a scriptor for an Etoys object.
• Hold the mouse button for a second on the "script status" that is showing "Normal" by default. You'll get a menu.
• From the menu, choose "mouseDown" or "mouseUp". The script will be executed when you do click on (or click on and release) the object.

-- Yoshiki

Actually, any script can produce a button to fire it, and also, any

object in Etoys can serve as a button (including text objects).

1. Suppose you have a text object named Text that contains some text:

'This is some text'.

Drag out Text's characters <- This is some text onto the desktop to

make a script.

Do it again to make a second script. Name the first script "reset"

and the second one "change".

Change the text in the "change" script.

These scripts can be tested by clicking on the (!).

A script will give you a button to fire it. Look at the menu item in

a script

[]

and choose the item button to fire this script.

Do this for the other script. Both of these buttons can be relabeled.

Here is what this example looks like

[]

2. You can also use any object as a button. Get out a rectangle. Put

an empty rectangle script on the desktop. Put the tiles:

Text's characters <- This is different text in this script. Now look

at the normal menu and choose mouseUp. This script will fire when

you do mouseUp on the rectangle object.

[]

You can make a toggle by adding a variable to hold true or false, etc.

Cheers,

Alan

At 05:18 PM 3/3/2007, Young-Jin Lee wrote:

>Hi,

>

>I am a newbie and trying to learn how to develop educational material

>using E-Toy.

>I went through several E-toy project, but still need some helps.

>

>In the test program I was writing, I put a few text objects and a

>Button object from "Supplies" tab. My object was to change the text of

>one of the text objects when the Button is clicked.

>

>First, I opened a Viewer for the Button object to figure out what

>kinds of things I can do to this Button object. I expected to find a

>method that will be invoked when the button object is clicked. To my

>surprise, there is no such method.

>

>I was able to achieve the goal by (1) creating a script to change the

>text of one of the text objects and (2) creating "Button to fire to

>this script". But, I don't think this method is in sprite of Squeack,

>visual programming. I want to first create a button and make this

>button change the text of one of the text objects when this button is

>clicked, not the other way around. To me, this approach is in line of

>Squeak's philosophy.

>

>Can any one please explain what I have missed?

>

>Thanks in advance.

>

>Young-Jin

>___________________________________