WP Add picture

Home

4D v20 R7

WP Add picture


WP Add picture ( wpDoc {; picture} ) -> Function result

Parameter	Type	Description
wpDoc	Object	4D Write Pro document
picture	Picture, Text	Picture or Picture path
Function result	Object	Object referencing the picture

Description

The WP Add picture command anchors picture at a fixed location within the wpDoc and returns its reference. The returned reference can then be passed to the WP SET ATTRIBUTES command to move picture to any location in wpDoc (page, section, header, footer, etc.) with a defined layer, size, etc.

In wpDoc, pass the name of a 4D Write Pro document object.

In the optional picture parameter, you can pass:

either a 4D picture,
or a string containing a path to a picture file stored on disk, expressed using the system syntax.
You can pass either a full pathname, or a pathname relative to the database structure file. You can also pass a file name, in which case the file must be located next to the database structure file. If you pass a file name, you need to indicate the file extension.

Note: Any picture format supported by 4D can be used (see the Pictures section). You can get the list of available picture formats using the PICTURE CODEC LIST command. If the picture encapsulates several formats (codecs), 4D Write Pro only keeps one format for display and one format for printing (if different) in the document; the "best" formats are automatically selected.

If picture is omitted, you will obtain a valid picture reference and an empty image will be added. This allows you to then call the WP SET ATTRIBUTES command with the wk image expression selector to use a 4D expression to fill the image. If the expression can not be evaluated or does not return a valid 4D picture, an empty image (default black frame image) will be displayed.

By default, the added picture is:

embedded behind the text,
displayed at the top left corner of the paper box,
displayed on all pages.

The location, layer (inline, in front/behind text), visibility, and any properties of picture can be modified using the WP SET ATTRIBUTES command, or via standard actions (see Using 4D Write Pro standard actions).

Note: The WP Selection range command returns a picture reference object if a an anchored picture is selected and a range object if an inline picture is selected. You can check if a selected object is a picture object with the wk type attribute. If the value = 2, then it is a picture object, otherwise it is a range object (value = 0).

Example 1

You want to add a picture with default settings using a filepath.

 C_OBJECT($obPict)

 $obPict:=WP Add picture(myDoc;"C:\\Users\\John.Doe\\Pictures\\Sunrise.jpg")

The result is:

Example 2

You want to add a resized picture, centered and anchored to the header:

 C_OBJECT($obImage)

 $obImage:=WP Add picture(myDoc;"C:\\Users\\John.Doe\\Pictures\\Saved Pictures\\Sunrise.jpg")

 WP SET ATTRIBUTES($obImage;wk anchor origin;wk header box)

 WP SET ATTRIBUTES($obImage;wk anchor horizontal align;wk center)

 WP SET ATTRIBUTES($obImage;wk anchor vertical align;wk center)

 WP SET ATTRIBUTES($obImage;wk width;"650px";wk height;"120px")

The result is:

Example 3

You want to use a field expression to add an anchored image to a document displaying some text from the database:

 QUERY([Flowers];[Flowers]Common_Name="tulip")

 WP SET TEXT(myDoc;[Flowers]Description;wk append) //insert text

 C_OBJECT($obImage)

 $obImage:=WP Add picture(myDoc)

 WP SET ATTRIBUTES($obImage;wk image formula;Formula([Flowers]Image))