How to create a checkbox that enables or disables based on one or many other selected checkboxes?

Question

I have one checkbox called AIR, I want it to be read only. This checkbox should be enabled or disabled based on other checkboxes value(s). So for example: "air freight" or "airway" or" aircraft" are checked then check "AIR". If I uncheck one of this items "air freight" or "airway" or" aircraft", I want AIR to remain checked. Only if all are unchecked AIR should be unchecked, too.

Thom Parker · Accepted Answer

Since there are multiple sources for setting the "Air" checkbox, then this action is best handled with a calculation script. Unfortunately there is not a publicly accessible calculation script on a checkbox. So you'll need to create a hidden text field. The only purpose of this text field is to provide the calculation event needed for setting the checkbox.

Here is the calculation script

var bIsSet = this.getField("air freight").isBoxChecked(0) || this.getField("airway").isBoxChecked(0) || this.getField("aircraft").isBoxChecked(0);

this.getField("AIR").checkThisBox(0,bIsSet);

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