Adjust Alpha by shortcut keys, with JSFL-command code

Hi.

These scripts should help:

https://github.com/joao-cesar/adobe/tree/master/animate%20cc/jsfl/offset_alpha

OffsetAlphaBasis.jsfl code (for reference only):

var dom, selection;
var filePreffix = "OffsetAlphaBy";

function main(fileName)
{
	var offset;
	
	dom = fl.getDocumentDOM();
	
	if (!dom)
	{
		alert("Please open up a FLA first.");
		return;
	}
	
	selection = dom.selection;
	
	if (selection.length === 0 || selection[0].instanceType !== "symbol")
	{
		alert("Please select a symbol instance first.");
		return;
	}
	
	offset = parseInt(fileName.replace(filePreffix, ""));
	
	if (isNaN(offset))
	{
		alert("Offset is not a valid number.");
		return;
	}
	
	dom.setInstanceAlpha(clamp(0, selection[0].colorAlphaPercent + offset, 100));	
}

function clamp(min, value, max)
{
	if (value < min)
		return min;
	
	if (value > max)
		return max;
	
	return value
}

OffsetAlphaBy10.jsfl code (for reference only):

var scriptURI = fl.scriptURI;
var fileName = scriptURI.split("/").pop();
var baseScriptPath = scriptURI.replace(fileName, "") + "OffsetAlphaBasis.jsfl";

fl.runScript(baseScriptPath, "main", fileName);

The other scripts have the same code of the OffsetAlphaBy10.jsfl.

Except for the OffsetAlphaBasis.jsfl file, just assign the other ones to the desired shortcut.

One thing to notice here is that the offset value comes from the script name. So:

OffsetAlphaBy-10.jsfl will offset the alpha by -10;

OffsetAlphaBy-1.jsfl will offset the alpha by -1;

OffsetAlphaBy1.jsfl will offset the alpha by 1;

OffsetAlphaBy10.jsfl will offset the alpha by 10;

In this way you can assign other values if you need to. Just remember to place the OffsetAlphaBasis.jsfl file in the same directory of the other scripts.

One weird thing to notice is that the JSFL API doesn't have a proper way to get the alpha value of an instance... So what I did was to get the colorAlphaPercent property value to calculate the alpha. This is not a perfect solution but I hope it works in most cases.

I hope it helps.

Regards,

JC