Overview | Library | Tag | Help
| FRAMES NO FRAMES

## RichFaces
Tag paint2D

Create an image by paint in a managed bean, same as paint (Graphics g) in SWING components. It can be used as a cacheable or non-cacheable resource. With a cache support, a key is created in URI with a mix of size (width/height), paint method, format and data attributes.

Tag Information
Tag Class | org.richfaces.taglib.Paint2DTag
TagExtraInfo Class | None
Body Content | JSP
Display Name | None

Attributes
Name | Required | Request-time | Type | Description
value | false | false | `java.lang.String` | The initial value to set when rendered for the first time
width | false | false | `java.lang.String` | Width in pixels of image (for paint canvas and HTML attribute)
converter | false | false | `java.lang.String` | Id of Converter to be used or reference to a Converter
lang | false | false | `java.lang.String` | Code describing the language used in the generated markup for this component
title | false | false | `java.lang.String` | Advisory title information about markup elements generated for this component
rendered | false | false | `java.lang.String` | If "false", this component is not rendered
id | false | false | `java.lang.String` | Every component may have a unique id that is automatically created if omitted
styleClass | false | false | `java.lang.String` | Corresponds to the HTML class attribute
height | false | false | `java.lang.String` | Height in pixels of image (for paint canvas and HTML attribute)
data | false | false | `java.lang.String` | Value calculated at render time and stored in Image URI (as part of cache Key), at paint time passed to a paint method. It can be used for updating cache at change of image generating conditions, and for creating paint beans as "Lightweight" pattern components (request scope). IMPORTANT: Since serialized data stored in URI, avoid using big objects
align | false | false | `java.lang.String` | bottom|middle|top|left|right Deprecated. This attribute specifies the position of an IMG, OBJECT, or APPLET with respect to its context. The following values for align concern the object's position with respect to surrounding text: * bottom: means that the bottom of the object should be vertically aligned with the current baseline. This is the default value. * middle: means that the center of the object should be vertically aligned with the current baseline. * top: means that the top of the object should be vertically aligned with the top of the current text line
hspace | false | false | `java.lang.String` | Deprecated. This attribute specifies the amount of white space to be inserted to the left and right of an IMG, APPLET, or OBJECT. The default value is not specified, but is generally a small, non-zero length
vspace | false | false | `java.lang.String` | Deprecated. This attribute specifies the amount of white space to be inserted above and below an IMG, APPLET, or OBJECT. The default value is not specified, but is generally a small, non-zero length
style | false | false | `java.lang.String` | CSS style(s) is/are to be applied when this component is rendered
bgcolor | false | false | `java.lang.String` | Background color of painted image. Default value is 'transparent' which means no background fill. Hex colors can be used, as well as common color names. Invalid values are treated as transparent. Note, that JPEG format doesn't support transparency, and transparent background is painted black. Also note, that several browsers (e.g. IE6) do not support PNG transparency
cacheable | false | false | `java.lang.String` | Supported (or not) client/server caching for generated images. Caching on client supported by properly sending and processing of HTTP headers (Last-Modified, Expires, If-Modified-Since, etc.) Server-side caching is supported by application-scope object cache. For build of cache key use "value" attribute, serialized to URI
border | false | false | `java.lang.String` | Deprecated. This attribute specifies the width of an IMG or OBJECT border, in pixels. The default value for this attribute depends on the user agent
binding | false | false | `java.lang.String` | The attribute takes a value-binding expression for a component property of a backing bean
paint | false | false | `java.lang.String` | The method calls expression to paint Image on prepared Buffered image. It must have two parameters with a type of java.awt.Graphics2D (graphics to paint) and Object (restored from URI "data" property). For painting used 32-bit RGBA color model (for 8-bit images used Diffusion filtration before sending)
format | false | false | `java.lang.String` | format Name of format for sending a generated image. It currently supports "jpeg" (24 bit, default), "gif" (8 bit with transparency), "png" (32 bit with transparency)

Variables
| No Variables Defined.

Overview | Library | Tag | Help
| FRAMES NO FRAMES

Output Generated by Tag Library Documentation Generator. Java, JSP, and JavaServer Pages are trademarks or registered trademarks of Sun Microsystems, Inc. in the US and other countries. Copyright 2002-4 Sun Microsystems, Inc. 4150 Network Circle Santa Clara, CA 95054, U.S.A. All Rights Reserved.