|
Attributes
|
|
Name
|
Required
|
Request-time
|
Type
|
Description
|
| 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 |
| 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 |
| binding |
false |
false |
java.lang.String
|
The attribute takes a value-binding expression for a component property of a backing bean |
| 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 |
| 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 |
| converter |
false |
false |
java.lang.String
|
Id of Converter to be used or reference to a Converter |
| 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 |
| 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) |
| height |
false |
false |
java.lang.String
|
Height in pixels of image (for paint canvas and HTML attribute) |
| 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 |
| id |
false |
false |
java.lang.String
|
Every component may have a unique id that is automatically created if omitted |
| lang |
false |
false |
java.lang.String
|
Code describing the language used in the generated markup for this component |
| 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) |
| rendered |
false |
false |
java.lang.String
|
If "false", this component is not rendered |
| style |
false |
false |
java.lang.String
|
CSS style(s) is/are to be applied when this component is rendered |
| styleClass |
false |
false |
java.lang.String
|
Corresponds to the HTML class attribute |
| title |
false |
false |
java.lang.String
|
Advisory title information about markup elements generated for this component |
| value |
false |
false |
java.lang.String
|
The initial value to set when rendered for the first time |
| 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 |
| width |
false |
false |
java.lang.String
|
Width in pixels of image (for paint canvas and HTML attribute) |