AddEventListener
addEventListener() is a common BrightSign method that is used to listen for an event.
Syntax:
| Code Block | ||
|---|---|---|
| ||
target.addEventListener(type, listener); |
...
typestring
...
:
...
Specifies the type of event to listen for
...
listenerfunction
...
: The object to be notified when the event (of the specified
type) happens
RemoveEventListener
removeEventListener()is a common BrightSign method that is
...
used to remove an event listener.
Syntax:
| Code Block | ||
|---|---|---|
| ||
target.removeEventListener(type, listener); |
...
typestring
...
: Specifies the type of event to listen for
...
listenerfunction
...
:
...
The object to be notified when the event (of the specified
type) happens
...
Reserved Methods:
The following methods are reserved for BrightSign use only:
checkPassword()
getDigestHash()
...
Example
| Code Block | ||
|---|---|---|
| ||
function GPIOcontrolDown(msg){
console.log(JSON.stringify(msg));
console.log(" GPIO : " + msg.detail)
}
// to add an event listener for the "controldown" GPIO event
control_port.addEventListener("controldown", GPIOcontrolDown);
// to remove the "controldown" GPIO event listener
control_port.removeEventListener("controldown", GPIOcontrolDown); |