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Defining the area of a selection object

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CHAPTER 3: Scripting Photoshop Advanced Scripting 67 ➤ Apply a wave filter to the selection. NOTE: The wave is a truncated sine curve. Defining the area of a selection object To define the area of a selection object, we create an array of coordinates, or points specified in pixels within the document. The array indicates the coordinates that define the outside corners of a rectangular area that begins at the top left corner of the document and extends half way across the document. NOTE: You can define any number of points for a selected area. The number of coordinates determines the shape of the selection. The last coordinate defined must be the same as the first so that the area is a closed selection path. NOTE: See "Photoshop Object Model" on page 11 for information on selection objects and other Photoshop objects. The array values in order are: ➤ Upper left corner of the selection: 0,0 ➣ 0 indicates the left-most column in the document. ➣ 0 indicates the top row in the document. ➤ Upper right corner of the selection: theDocWidthInPixels / 2, 0 ➣ theDocWidthInPixels / 2 indicates the column in the middle of the document; that is, the column whose coordinate is the total number of columns in the document divided by 2. NOTE: The value of theDocWidthInPixels is the total number of pixels that defines the document's horizontal dimension. Columns are arranged horizontally. ➣ 0 indicates the top row in the document. ➤ Lower right corner: theDocWidthInPixels / 2, theDocHeightInPixels ➣ theDocWidthInPixels / 2 indicates the middle of the document. ➣ theDocHeightInPixels indicates the bottom row in the document; that is row whose coordinate is the total number of rows in the document. NOTE: The value of theDocHeightInPixels is the total number of pixels that determine the vertical dimension of the document. Rows are stacked vertically. ➤ Lower left corner: 0, theDocHeightInPixels ➣ 0 indicates the left-most column in the document. ➣ theDocHeightInPixels indicates the bottom row in the document ➤ Upper left corner of the selection: 0,0 ➣ This closes the selection path back at the initial point.

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

Advanced Scripting

➤

Apply a wave filter to the selection.

OTE

The wave is a truncated sine curve.

Defining the area of a selection object

To define the area of a selection object, we create an array of coordinates, or points specified in pixels

within the document. The array indicates the coordinates that define the outside corners of a rectangular

area that begins at the top left corner of the document and extends half way across the document.

OTE

You can define any number of points for a selected area. The number of coordinates determines the

shape of the selection. The last coordinate defined must be the same as the first so that the area is a closed

selection path.

OTE

See

“Photoshop Object Model” on page 11

for information on selection objects and other

Photoshop objects.

The array values in order are:

➤

Upper left corner of the selection:

0,0

➣

indicates the left-most column in the document.

➣

indicates the top row in the document.

➤

Upper right corner of the selection:

theDocWidthInPixels

➣

theDocWidthInPixels

indicates the column in the middle of the document; that is, the

column whose coordinate is the total number of columns in the document divided by 2.

OTE

The value of

theDocWidthInPixels

is the total number of pixels that defines the document’s

horizontal dimension. Columns are arranged horizontally.

➣

indicates the top row in the document.

➤

Lower right corner:

theDocWidthInPixels

theDocHeightInPixels

➣

theDocWidthInPixels

indicates the middle of the document.

➣

theDocHeightInPixels

indicates the bottom row in the document; that is row whose coordinate

is the total number of rows in the document.

OTE

The value of

theDocHeightInPixels

is the total number of pixels that determine the vertical

dimension of the document. Rows are stacked vertically.

➤

Lower left corner:

theDocHeightInPixels

➣

indicates the left-most column in the document.

➣

theDocHeightInPixels

indicates the bottom row in the document

➤

Upper left corner of the selection:

0,0

➣

This closes the selection path back at the initial point.