JavaScript for Clearing JPEGs out of a Form??? (Adobe Acrobat Pro DC)

Hi.

Instead of importing a fake gray image, you can target a button without an icon… and import it.

So, this will delete the current icon.

In this script "Button1" is the button without icon (that can be hidden), and "Button2" is the button to reset:

var oIconClear = this.getField("Button1").buttonGetIcon({nFace: 0});
this.getField("Button2").buttonSetIcon({oIcon: oIconClear, nFace: 0});

Joel gave you the key to solving this, but there are a few things you can do to make this a bit easier on you.

First, you need to use a hierarchical name for your image buttons (e.g. "Img.1", "Img.2", and so on). Then, create individual buttons to clear a single image using a similar naming convention (e.g. "ImgBtn.1" to clear "Img.1", "ImgBtn.2" to clear "Img.2" and so on). Now you can determine the index (the numeric part of the button name) when a button is clicked, and then use that to dynamically create the associated image field ("ImgBtn.1" -> "Img.1"). And finally, you call the code from Joel's reply to copy the image from a hidden and read-only placeholder button (which I call "blank"):

// get the button index
var pos = event.target.name.lastIndexOf(".");
var myIdx = event.target.name.substring(pos+1);
// get the associated image field
var f = this.getField("Img." + myIdx);
// get the blank image and set it's icon to the associated image field
f.buttonSetIcon(this.getField("blank").buttonGetIcon());

Because you've used a hierarchical naming convention for your image fields, you can now also used a shortcut to dynamically loop over all image fields without having to know how many there are, or what their full names are by using the following script:

var f = this.getField("Img");
var ar = f.getArray();
for (var i=0; i<ar.length; i++) {
    f = ar;
    ar.buttonSetIcon(this.getField("blank").buttonGetIcon());
}

It should be obvious, but I'll state it again: Don't copy any code that you don't fully understand. Otherwise you will not be able to make the adjustments necessary to make this work in your document. If you need help understanding what these lines do, consult the Acrobat JavaScript SDK documentation, and/or ask here. You can find the documentation here:

Acrobat DC SDK Documentation

The easiest way to do this is to create another button, probably hidden, that contains a placeholder image... which could be all gray... and then use JavaScript to get that icon and use it to set the icon of the button you want to clear.

this.getField("MyNormalButton").setIcon(this.getField("ButtonWithMyPlaceHolder").getIcon());

You could create an array of field names and put that code in a loop to clear all the fields in the array.

J-