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## 6.81. < rich:spacer >

### 6.81.1. Description

A spacer that is used in layout and rendered as a transparent image.

Figure 6.255. <rich:spacer> component

### 6.81.2. Key Features

- Easily used as a transparent layout spacer

- Horizontal or vertical spacing is managed by an attribute

- Easily customizable sizes parameters

Table 6.445. rich : spacer attributes

Attribute Name | Description
--- | ---
binding | The attribute takes a value-binding expression for a component property of a backing bean
height | The height of the spacer defined in pixels. Default value is "1px".
id | Every component may have a unique id that is automatically created if omitted
onclick | HTML: a script expression; a pointer button is clicked
ondblclick | HTML: a script expression; a pointer button is double-clicked
onkeydown | HTML: a script expression; a key is pressed down
onkeypress | HTML: a script expression; a key is pressed and released
onkeyup | HTML: a script expression; a key is released
onmousedown | HTML: script expression; a pointer button is pressed down
onmousemove | HTML: a script expression; a pointer is moved within
onmouseout | HTML: a script expression; a pointer is moved away
onmouseover | HTML: a script expression; a pointer is moved onto
onmouseup | HTML: script expression; a pointer button is released
rendered | If "false", this component is not rendered
style | CSS style(s) is/are to be applied when this component is rendered
styleClass | Corresponds to the HTML class attribute
title | HTML: An advisory title for this element. Often used by the user agent as a tooltip
width | The width of the spacer defined in pixels. Default value is "1px".

Table 6.446. Component identification parameters

Name | Value
--- | ---
component-type | org.richfaces.spacer
component-class | org.richfaces.component.html.HtmlSpacer
component-family | org.richfaces.spacer
renderer-type | org.richfaces.SpacerRenderer
tag-class | org.richfaces.taglib.SpacerTag

### 6.81.3. Creating the Component with a Page Tag

To create the simplest variant on a page use the following syntax::

Example:

    ...

        <rich:spacer/>

    ...

### 6.81.4. Creating the Component Dynamically Using Java

Example:

    import org.richfaces.component.html.HtmlSpacer;

    ...

    HtmlSpacer mySpacer = new HtmlSpacer();

    ...

### 6.81.5. Details of Usage

<rich:spacer> is a simple layout component which represents a transparent spacer. Thus, the main attributes that define its style are "style" and "styleClass".

In addition, the attributes are responsible for the component size: "width" and "height".

Moreover, to add e.g. some JavaScript effects, events defined on it are used.

- "onmouseover "

- "onclick "

- "onmouseout "

- etc.

### 6.81.6. Look-and-Feel Customization

On the component generation, the framework presents a default rich-spacer class in "styleClass" of a generated component, i.e. in order to redefine appearance of all spacers at once, it's necessary to redefine this class in your own CSS (replacing in the result properties defined in a skin with your own).

To define appearance of the particular spacer, it's possible to write your own CSS classes and properties in the component style attributes ( "style", "styleClass" ) modifying component property.

### 6.81.7. Relevant Resources Links

Here you can see the example of <rich:spacer> usage and sources for the given example.

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