5f7a8e5301
* update yotta defaults for 16kb devices * refactor deprecated blocks * updates for button events * update button events * update refference * update docs * update docs * update button event blocks * update docs * update block id
1.9 KiB
On Button Event
Start an event handler (part of the program that will run when something happens, like when a button is pressed).
This handler works when button A or B is clicked, or A and B together. You can choose another event type by using
the button event block. Possible event types are pressed down (1), released up (2), clicked (3), long clicked (4) or hold (5).
When you are using this function in a web browser, click the buttons on the screen instead of the ones on the @boardname@.
- For button
AorB: This handler works when the button is pushed down and released within 1 second. - For
AandBtogether: This handler works whenAandBare both pushed down, then one of them is released within 1.5 seconds of pushing down the second button.
input.onButtonEvent(Button.A, input.buttonEventClick(), () => {})
Find out how buttons provide input to the @boardname@ in this video:
https://www.youtube.com/watch?v=t_Qujjd_38o
Example: count button clicks
This example counts how many times you press the A button.
Each time you press the button, the LED screen shows the count variable getting bigger.
let count = 0
basic.showNumber(count)
input.onButtonEvent(Button.A, input.buttonEventClick(), () => {
count++;
basic.showNumber(count);
})
Example: roll dice
This example shows a number from 1 to 6 when you press the B button.
input.onButtonEvent(Button.B, input.buttonEventClick(), () => {
let dice = randint(0, 5) + 1
basic.showNumber(dice)
})
~hint
This program adds a 1 to random(5) so the numbers on the dice will come out right.
Otherwise, sometimes they would show a 0.