CheckBox - Once Checked you cannot uncheck ? - GoogleAppsScript / GoogleSheets - google-apps-script

Question

Is it possible to code a checkbox that once checked it stays checked ?
My code would run again if a person checked - then unchecked - then accidently checked again, something I dont want to happen.
Here is the code
function onEdit(e) {
AddPalletCount(e)
AddCheckBox(e)
}
function AddCheckBox(e){
var row = e.range.getRow();
var col = e.range.getColumn();
if(col === 2 && row > 2 && e.source.getActiveSheet().getName() === "PREPSHEET"){
e.source.getActiveSheet().getRange(row,4).setValue(new Date());
e.source.getActiveSheet().getRange(row,3).setValue("Done");
var sheet = SpreadsheetApp.getActiveSheet();
var activeRange = sheet.getActiveRange();
var criteria = SpreadsheetApp.DataValidationCriteria.CHECKBOX;
var rule = SpreadsheetApp.newDataValidation().requireCheckbox().build();
var range = sheet.getRange(activeRange.getRow(), 5);
range.setDataValidation(rule);
}}
Thanks In Advance

Answer 1

A checkbox that stay's check once it's checked
It doesn't actually stay checked but once you check and try to uncheck it, it rechecks itself. It has to change in order to get the onEdit trigger.
Also note that this has to be an installable trigger because simple triggers can't do things that require permission like changing user data.
function onMyEdit(e) {
//e.source.toast('Entry');//debug
var sh=e.range.getSheet();
//var log=Utilities.formatString('oldValue: %s value: %s',e.oldValue,e.value);//debug
//sh.getRange(sh.getRange(1,9,sh.getLastRow(),1).getValues().filter(String).length+1,9).setValue(log);//debug
if(e.range.columnStart==2 && e.range.rowStart>2 && sh.getName()=='DONATIONS RECEIVED') {
//e.source.toast('Access');//debug
if(e.oldValue=='true' && e.value=='FALSE') {
//e.source.toast('SetValue');//debug
e.range.setValue("TRUE");
}
}
}
You might wish to keep lines 4 and 5 for future onEdit debugging work as I found them quite helpful in solving this problem.