Reset drop-down value to default when drop-down becomes hidden.

[deltaalphakilo]

Working with a few dropdowns, one is always visible and when a value is selected in it, another field  becomes visible. How can I tell the invisible dropdowns to return to a default value if they're invisible?

if (this.getField("Make").value == "Chevrolet") this.getField("Chevrolet Models") display = display.visible;

else if (this.getField("Make").value != "Chevrolet") this.getField("Chevrolet Models") display = display.hidden;

That's all I'm working with so far. It'll hide the field of course but if a value is selected in the newly visible field it will remain selected when the field is invisible. 

Halp plz!

[ls_rbls · Accepted solution]

First make sure that both dropdown menu fields are set to commit selected value immediately and disable to allow users to enter custom text.

Also add a space entry in the dropdown options lists. 

This is key in order to be able to use the "this.resetForm()" function or to use a condition  that will aid in having the Chevrolet Models dropdown appear as null or blank if "Chevrolet" is selected in the Make dropdown. menu field.

See slide:

Note in the slide above that I have selected the blank entry as my first choice before closing the dialogue box. If you don't do this , when you reset this field, it will always default to whatever you had selected in it before you close the Properties dialoguw box.

For the script portion of this exercise, I am using the following  as custom calculation script in the "Make" dropdown menu field:

if (event.value == "Chevrolet") {

   this.getField("Chevrolet Models").display = display.visible;

   }

if (event.value !== "Chevrolet") {
   
   this.getField("Chevrolet Models").display = display.hidden;
   
   if (this.getField("Chevrolet Models").value !=="") {this.getField("Chevrolet Models").value =" ";}

// or you can use ---->>>>   this.resetForm(["Chevrolet Models"]);

 }

Note also that in the script that you've posted earlier there is a space before the word "display: 

•  this.getField("Chevrolet Models") display 

It should be a single phrase connected by a period( ".") soon  after the prenthesis " ) " and before the word "display", like this:

•  this.getField("Chevrolet Models").display 
•  

[try67]

Small correction. It's not:

this.reset.Form(["Chevrolet Models"]);

But:

this.resetForm(["Chevrolet Models"]);

[ls_rbls]

Oooh! sorry about that I missed that typo. Thank you!

[ls_rbls]

I just fixed it.

[deltaalphakilo]

This worked prefectly! Thank you so much for your help!  I saw your note about the typo and went over the code very carefully to see if there were any other inconsistencies- found 2.

if (event.value == "Chevrolet") { this.getField("Chevrolet Models").display = display.visible; }
if (event.value !== "Chevrolet") { this.getField("Chevrolet Models").display = display.hidden; }
if (this.getField("Chevrolet Models").value !=="") { this.resetForm(["Chevrolet Models"]); }

I added a } at the end of the second if statement and a space between the last { and this.resetForm.  I'm still learning all this as I go so I have no idea if they're even relevant changes.

Thanks again! This solves a ton of current and anticipated headaches!