Page 167 - Computing E-Book Grade 7

The City School 2021-2022

4. Next drop the onEvent()function on the code area. Add code inside the onEvent

that will change the background colour of the screen. You can read this block like a
sentence: “On the event that the button is clicked run all this code.” Mobile App Development

5. If you want to change more things after the event, like the text on the screen just
add more code to the onEvent(). To make your program respond to more events

add more onEvent(). blocks. Just make sure not to put them inside of each other.
Now it’s time to try it out for yourself.

7.4. Working with Sound
Checkpoint
1. In the toolbox, you’ll find a new block
The setProperty() block changes
called playSound(). Drag it into the the look of the elements on your
screen.
workspace. You can pick a sound to Events are user actions like clicking a

play by clicking the drop-down then button, scrolling through a menu, or
hovering over a picture.
clicking Choose. The playSound() block allows you to
add sound to your app.

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