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 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) |