Errata

Step 2, changing the Width of the HorizontalArrangement, should be eliminated (so that the Width remains Automatic) and Figure 2-3 should be updated to show that. These changes are needed so that the the final paragraph on page 22 is correct, namely that the centering can be done at the screen level. The alternative would be to leave Step 2 and Figure 2-3 alone and instead change the final paragraph to say that the horizontal centering should be set in the properties of the HorizontalArrangement itself -- but then Figures 2-4 and 2-5 would need to be updated, so my earlier suggestion seems the simpler approach.

Note from the Author or Editor:
I have a replacement figure for fig 2.3. (how do I upload?)

And we should remove step 2 from the 3 step list above fig 2.3-- remove the line saying, "In the Properties panel, change the Width of the HorizontalArrangement..." So there are only two items.

The .DrawCircle method of a Canvas object has 4 parameters, not 3: x, y, r and fill. The figure only shows x, y, and r

Note from the Author or Editor:
* Replace figures with replacements I emailed to you.
* replaceall any in-text references of "touchedSprite" with "touchedAnySprite".
* replaceall any in-text references of "draggedSprite" with "draggedAnySprite"

P.27 in paragraph starting "On the right side...", leave formatting but change text to:

On the right side of the DrawingCanvas.DrawCircle block, you’ll see four
sockets for the arguments we need to plug in: centerX, centerY, radius, and fill. The centerX and centerY arguments specify the location where the circle should be drawn, radius determines the radius of the circle, and fill determines if the circle should be filled in with color. This event handler can be a bit confusing because the DrawingCanvas.Touched event has an x and y; just keep in mind that the x and y for the DrawingCanvas.Touched event indicate where the user touched,
whereas the centerX and centerY for the DrawingCanvas.DrawCircle event are open sockets for you to specify where the circle should be drawn. Because you want to draw the circle where the user touched, you’ll plug in the x and y values fromDrawingCanvas.Touched as the values to use for the centerX and centerY parameters in DrawingCanvas.DrawCircle.


* Replace text in numeral 4. that starts with "Now, you'll need to specify the radius , r, of the circle to draw" with "Now you'll need to specify the radius of the circle to draw"

and text "plug that into the r socket" with "plug that into the radius socket"

It reads "Also from the User Interface drawer, drag in a Clock component." However, Clock components are located in the Sensors drawer.

Note from the Author or Editor:
In Table 3-1, on the row with Component type "Clock", change the Palette group column value from "User Interface" to "Sensors".

On list item 4 of the same page, change the start of the sentence from "Also from the User Interface drawer" to "From the Sensors drawer".

I can not see how the join method receives 4 parameters. I only see two, and I can't make it increase to 4.

Note from the Author or Editor:
Above Figure 4-8 is the text:

So, if the text “hello”was sent from the number “111-2222,” the phone would say, “SMS text received from 111-2222. The message is hello.

Leave this, but add a sentence after so that it reads:

So, if the text “hello”was sent from the number “111-2222,” the phone would say, “SMS text received from 111-2222. The message is hello.

Note that when you drag in a join block, it has two slots, but you can click the blue icon on the block to add more slots.

join does not allow 3 or 4 parameters. It only allows 2. The blocks are not correct in the figure. Also, in figure 4-11 on page 65

Note from the Author or Editor:
I'm adding some text above this area for another errata which will fix this problem as well.

Page 75, Steps 4 and 5 have us adding 2 parameters to the DrawEnergyLine procedure. The steps are explicit in that parameter "color" must go beneath the parameter named "length".

However, every subsequent Figure showing the DrawEnergyLine procedure in this chapter, starting with Figure 5-7 on page 76, have "color" above "length". I'm confused - what is the correct order of these parameters? Does the order matter? If not, why do the steps on page 75 tell us it does?

Note from the Author or Editor:
This is indeed a mistake. The "length" parameter should go after the "color" parameter in the instructions and Figure 5-6.

On page 101, chapter 7, The table. 7-1 misnamed some components.
Namely, on the 11th row, the component type should be "HorizontalArrangement" rather than "Label". In addition, another "HorizontalArrangement component should be added
(which is forgotten) for the remembered GPS properties.

Note from the Author or Editor:
Table 7.1 changes:

* 11th row with What you'll name it "HorizontalArrangement2", change the first column from "Label" to "HorizontalArrangement", change 2nd column from "User Interface" to "Layout, change 3rd column (What you'll name it) to "HorizontalArrangement3".
* add a row after 13th which is:

HorizontalArrangement, Layout, HorizontalArrangement4, "Arrange the remembered GPS info"

*

Clock is listed as being in the User Interface component group. It is actually in the Sensors group.

Note from the Author or Editor:


table 3-1, change the fourth row, second column, so that the Palette group for the Clock is “Sensors” not “User Interface”

table 5-1, change the fourth row, second column, so that the Palette group for the Clock is “Sensors” not “User Interface”

table 9-1, change last row, second column, so that the Palette group for the Clock is “Sensors” not “User Interface”

The sound files 6.wav and 7.wav are in reverse order. To have the xylophone play a correct scale, you must switch them.

Note from the Author or Editor:
I have asked Dave Wolber to swap the files on his server.