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Event "While ... true"
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talmalee
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Default Event "While ... true" - 02-28-2013, 07:27 PM

Hello everyone,

I found my question was asked by two people in 2009 but neither of them were answered so I am going to ask it again.

In the book "Programming with Alice and Java" on page 78, Figure 4.16 shows:

While [left button.depressed] is true
Begin: [Nothing]
During: [Left button.playMusic]
End: [Nothing]

On the next page we are asked to create this same event for three more conditions but no matter what method I try to use the only choice I get is true or false and I am unable to get [middle button.depressed] is true.

I have used version 2.0 and version 2.3 but neither version allows me to use this "[middle button.depressed] is true" while creating an event. However, I can use it in a method when using using a "While" statement.

Hopefully my explanation has made sense and someone will be able to tell me what I am doing wrong.

Thank you in advance!
   
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One could only Guess
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MrMoke
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Default One could only Guess - 02-28-2013, 10:04 PM

Since we don't all have your textbook with us.

Maybe you could-
  1. Drag a button object into the world.
  2. Rename it to "Left Button".
  3. Create a boolean variable for it called "depressed".
  4. Create a method for it called "PlayMusic".
  5. Work from there.
   
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Need to make it work in an "Event"
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talmalee
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Default Need to make it work in an "Event" - 02-28-2013, 10:44 PM

Thank you for the ideas. There are many ways to get the same effect but the textbook example works and plays the music for the left button while the world is running and the left button is depressed because there is a boolean variable called depressed. The textbook is asking me to use the same method to create an "event" that will play music while the center button and the right button are depressed. As stated in the original post, it works in a "method" but not an "event". Obviously Alice is supposed to allow it or the sample world could not have an "event" like the above example already working.

Why won't it let me do it the exact same way as the sample world? What am I missing?
   
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