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Creating a Layer Set object, Referencing ArtLayer objects

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CHAPTER 3: Scripting Photoshop Working with the Photoshop Object Model 38 Creating a Layer Set object AS VBS JS The following examples show how to create a Layer Set object after the creating the first ArtLayer object in the current document: tell application "Adobe Photoshop CS4" make new document with properties {name:"My Document"} make new art layer at beginning of current document make new layer set after layer 1 of current document end tell Dim appRef Set appRef = CreateObject("Photoshop.Application") 'Make a new document and a first layer in the document appRef.Documents.Add() appRef.ActiveDocument.ArtLayers.Add() ' Get a reference to the first layer in the document Dim layerRef Set layerRef = appRef.ActiveDocument.Layers(1) ' Create a new LayerSet (it will be created at the beginning of the document) Dim newLayerSetRef Set newLayerSetRef = appRef.ActiveDocument.LayerSets.Add ' Move the new layer to after the first layer newLayerSetRef.Move layerRef, 4 'psPlaceAfter // make a new document and a layer in the document app.documents.add() app.activeDocument.artLayers.add() // Get a reference to the first layer in the document var layerRef = app.activeDocument.layers[0] // Create a new LayerSet (it will be created at the beginning of the // document) var newLayerSetRef = app.activeDocument.layerSets.add() // Move the new layer to after the first layer newLayerSetRef.move(layerRef, ElementPlacement.PLACEAFTER) Referencing ArtLayer objects When you create a layer in the Photoshop application (rather than a script), the layer is added to the Layers palette and given a number. These numbers act as layer names and do not correspond to the index numbers of ArtLayer objects you create in a script. Your script-VBScript or JavaScript-will always consider the layer at the top of the list in the Layers palette as the first layer in the index. For example, if your document has four layers, the Photoshop application names them Background Layer, Layer 1, Layer 2, and Layer 3. Normally, Layer 3 would be at the top of the list in the Layers palette because you added it last.

Section	Page
Adobe® Creative Suite® 4 Photoshop® Scripting Guide	2
Introduction	6
About this Manual	6
Conventions in this Guide	6
Photoshop Scripting Basics	8
Scripting Overview	8
Why use scripts instead of actions?	8
Scripting Support in Photoshop	9
JavaScript support	9
Executing other scripts	10
Startup scripts	10
Executing JavaScripts from AS or VBS	10
Photoshop Object Model	11
Containment hierarchy	11
Application and document classes	12
Layer classes	12
Layer Comp class	13
Channel class	13
Selection class	13
History State class	13
Document Info class	13
Path Item, Sub Path Item, and Path Point classes	14
Preferences class	14
Notifier class	14
Count Item class	14
Color Sampler class	14
Measurement Scale class	14
The containment hierarchy and the Photoshop user interface	14
Additional objects	16
Constants	16
Creating a sample Hello World script	17
Creating and running an AppleScript	18
Creating and running a VBScript	19
Creating and running a JavaScript	19
Scripting Photoshop	21
Viewing Photoshop Objects, Commands, and Methods	21
Viewing Photoshop’s AppleScript dictionary	21
Viewing Photoshop’s type library (VBS)	22
Targeting and Referencing the Application Object	22
Creating New Objects in a Script	23
Setting the Active Object	25
Setting the active document	26
Setting the active layer	27
Setting the active channels	28
Opening a Document	28
Opening a file with default file format	28
Specifying file formats to open	29
Saving a Document	31
Setting Application Preferences	32
Allowing or Preventing Dialogs	33
Working with the Photoshop Object Model	33
Using the Application object	34
Using the Document object	34
Manipulating a document object	35
Working with layer objects	36
Creating an ArtLayer object	37
Creating a Layer Set object	38
Referencing ArtLayer objects	38
Working with Layer Set objects	39
Linking layer objects	40
Applying styles to layers	40
Using the Text Item object	41
Determining a layer’s kind	41
Adding and manipulating text in a Text Item object	42
Working with Selection objects	42
Creating and defining a selection	43
Stroking the selection border	44
Inverting selections	44
Expanding, contracting, and feathering selections	44
Filling a selection	45
Loading and storing selections	45
Working with Channel objects	46
Changing channel types	46
Using the Document Info object	47
Using history state objects	47
Using Notifier objects	48
Using the PathItem object	49
Working with color objects	51
Solid color classes	52
Using hex values for RGB color	52
Getting and converting colors	52
Comparing colors	53
Getting a Web-safe color	53
Working with Filters	53
Other filters	54
Understanding Clipboard Interaction	54
Using the copy and paste commands	54
Using the copy merged command/method	55
Working with Units	56
Unit values	56
Special unit value types	56
AppleScript unit considerations	56
Using unit values in calculations	57
Unit value usage	57
Setting ruler and type units in a script	59
Sample Workflow Automation JavaScripts	60
Advanced Scripting	60
Working with document preferences	61
Applying color to a text item	64
Applying a wave filter	66
Defining the area of a selection object	67
Applying a MotionBlur filter	71
Action Manager	73
The ScriptListener Plug-In	73
Installing ScriptListener	73
Action Manager Scripting Objects	74
Recording a Script using ScriptListener	74
Using the Action Manager from JavaScript	75
Using the Action Manager from a VBS Script	76
Running JavaScript-based Action Manager code from VBScript	79
Running JavaScript-based Action Manager code from AppleScript	80
Using ScriptListener to find event IDs and class IDs	81

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HAPTER

3: Scripting Photoshop

Working with the Photoshop Object Model

Creating a Layer Set object

The following examples show how to create a

Layer Set

object after the creating the first

ArtLayer

object in the current document:

tell application "Adobe Photoshop CS4"

make new document with properties {name:"My Document"}

make new art layer at beginning of current document

make new layer set after layer 1 of current document

end tell

VBS

Dim appRef

Set appRef = CreateObject("Photoshop.Application")

'Make a new document and a first layer in the document

appRef.Documents.Add()

appRef.ActiveDocument.ArtLayers.Add()

' Get a reference to the first layer in the document

Dim layerRef

Set layerRef = appRef.ActiveDocument.Layers(1)

' Create a new LayerSet (it will be created at the beginning of the document)

Dim newLayerSetRef

Set newLayerSetRef = appRef.ActiveDocument.LayerSets.Add

' Move the new layer to after the first layer

newLayerSetRef.Move layerRef, 4 'psPlaceAfter

// make a new document and a layer in the document

app.documents.add()

app.activeDocument.artLayers.add()

// Get a reference to the first layer in the document

var layerRef = app.activeDocument.layers[0]

// Create a new LayerSet (it will be created at the beginning of the // document)

var newLayerSetRef = app.activeDocument.layerSets.add()

// Move the new layer to after the first layer

newLayerSetRef.move(layerRef, ElementPlacement.PLACEAFTER)

Referencing ArtLayer objects

When you create a layer in the Photoshop application (rather than a script), the layer is added to the Layers

palette and given a number. These numbers act as layer names and do not correspond to the index

numbers of

ArtLayer

objects you create in a script.

Your script—VBScript or JavaScript—will always consider the layer at the top of the list in the Layers

palette as the first layer in the index. For example, if your document has four layers, the Photoshop

application names them Background Layer, Layer 1, Layer 2, and Layer 3. Normally, Layer 3 would be at the

top of the list in the Layers palette because you added it last.