Script for change of transparency of layers

ustinof · Post by **ustinof** » Sun Jan 19, 2014 6:24 am

Help!
The script for change of transparency of layers is necessary. The button + and -
Thanks in advance!

pfaffenbichler · Post by **pfaffenbichler** » Sun Jan 19, 2014 3:35 pm

Please explain more clearly what you want.
Why do the default keyboard shortcuts for setting Opacity and Fill not suffice for your needs?

ustinof · Post by **ustinof** » Tue Jan 21, 2014 6:03 am

It is necessary to me not with concrete value of transparency of a layer.
It is necessary измененить transparency as a percentage, for example to reduce by 5%.

pfaffenbichler · Post by **pfaffenbichler** » Tue Jan 21, 2014 9:13 am

For affecting the active Layer DOM code should suffice.
If you want to affect more than one selected Layers AM code would seem necessary.
Code: Select all// 2014, use it at your own risk;
#target photoshop
if (app.documents.length > 0) {
var theLayer = app.activeDocument.activeLayer;
if (theLayer.isBackgroundLayer == false) {
var theOpacity = theLayer.opacity - 5;
if (theOpacity < 0) {var theOpacity = 100 + theOpacity};
theLayer.opacity = theOpacity;
}
};

ustinof · Post by **ustinof** » Wed Jan 22, 2014 4:30 am

pfaffenbichler .

You the best! I asked many in Russia and in the world. Alas, anybody, except you couldn't or didn't want to answer correctly! !
Thanks! Good luck and prosperity! ! !

pfaffenbichler · Post by **pfaffenbichler** » Wed Jan 22, 2014 12:21 pm

You’re welcome.
But please keep in mind this works for one selected Layer, for more than one selected Layers a different approach (Action Manager instead of Document Object Model) would be necessary.

ustinof · Post by **ustinof** » Thu Jan 23, 2014 5:20 am

Thanks! Everything is right. And if with group of layers - what script?

pfaffenbichler · Post by **pfaffenbichler** » Thu Jan 23, 2014 2:47 pm

With one Group selected the Script should work fine, too.

But with more than one Layer (or Group) selected this should work:
Code: Select all// reduce opacity of selected layers by 5%;
// 2014, use it at your own risk;
#target photoshop
if (app.documents.length > 0) {
app.activeDocument.suspendHistory ("-5% opacity", "main ()")
};
////////////////////////////////////
function main () {
var theLayers = getSelectedLayersIdx();
// do stuff;
for (var m = 0; m < theLayers.length; m++) {
var theNumber = Number(theLayers[m]);
try {
   var ref = new ActionReference();
   //ref.putEnumerated( charIDToTypeID("Lyr "), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
   ref.putIndex( charIDToTypeID( "Lyr " ), theNumber);
   var layerDesc = executeActionGet(ref);
   var theName = layerDesc.getString(stringIDToTypeID('name'));
   var theOpacity = Math.round(layerDesc.getInteger(charIDToTypeID( "Opct" )) / 2.55);
   var theNewOpacity = theOpacity - 5;
   if (theNewOpacity < 0) {var theNewOpacity = 100 + theNewOpacity};
// set the opacity;
// =======================================================
var idsetd = charIDToTypeID( "setd" );
var desc2 = new ActionDescriptor();
var idnull = charIDToTypeID( "null" );
var ref1 = new ActionReference();
// ref1.putEnumerated( charIDToTypeID( "Lyr " ), idOrdn = charIDToTypeID( "Ordn" ), charIDToTypeID( "Trgt" ) );
ref1.putIndex( charIDToTypeID( "Lyr " ), theNumber);
desc2.putReference( idnull, ref1 );
var idT = charIDToTypeID( "T " );
var desc3 = new ActionDescriptor();
var idOpct = charIDToTypeID( "Opct" );
var idPrc = charIDToTypeID( "#Prc" );
desc3.putUnitDouble( idOpct, idPrc, theNewOpacity );
var idLyr = charIDToTypeID( "Lyr " );
desc2.putObject( idT, idLyr, desc3 );
executeAction( idsetd, desc2, DialogModes.NO );

   } catch (e) {};
};
/*
// reselect layers;
for (var p = 0; p < theLayers.length; p++) {
selectLayerByIndex(theLayers[p], true)
};*/
};
////// by paul mr;
function getSelectedLayersIdx(){
var selectedLayers = new Array;
var ref = new ActionReference();
ref.putEnumerated( charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
var desc = executeActionGet(ref);
if( desc.hasKey( stringIDToTypeID( 'targetLayers' ) ) ){
desc = desc.getList( stringIDToTypeID( 'targetLayers' ));
var c = desc.count
var selectedLayers = new Array();
for(var i=0;i<c;i++){
try{
activeDocument.backgroundLayer;
selectedLayers.push( desc.getReference( i ).getIndex() );
}catch(e){
selectedLayers.push( desc.getReference( i ).getIndex()+1 );
}
}
}else{
var ref = new ActionReference();
ref.putProperty( charIDToTypeID("Prpr") , charIDToTypeID( "ItmI" ));
ref.putEnumerated( charIDToTypeID("Lyr "), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
try{
activeDocument.backgroundLayer;
selectedLayers.push( executeActionGet(ref).getInteger(charIDToTypeID( "ItmI" ))-1);
}catch(e){
selectedLayers.push( executeActionGet(ref).getInteger(charIDToTypeID( "ItmI" )));
}
}
return selectedLayers;
};
// by mike hale, via paul riggott;
// http://forums.adobe.com/message/1944754#1944754
function selectLayerByIndex(index,add){
add = undefined ? add = false:add
var ref = new ActionReference();
ref.putIndex(charIDToTypeID("Lyr "), index);
var desc = new ActionDescriptor();
desc.putReference(charIDToTypeID("null"), ref );
if(add) desc.putEnumerated( stringIDToTypeID( "selectionModifier" ), stringIDToTypeID( "selectionModifierType" ), stringIDToTypeID( "addToSelection" ) );
desc.putBoolean( charIDToTypeID( "MkVs" ), false );
try{
executeAction(charIDToTypeID("slct"), desc, DialogModes.NO );
}catch(e){
alert(e.message);
}
};

ustinof · Post by **ustinof** » Fri Jan 24, 2014 4:55 pm

Class! Everything works! ! You excellent programmer! ! !