Project Documentation

Summary

Tag name: <tr:spacer>
UIComponent class: org.apache.myfaces.trinidad.component.core.output.CoreSpacer
Component type: org.apache.myfaces.trinidad.CoreSpacer
spacer occupies a fixed amount of space in a layout, specified by its width and height attributes. If the width is not specified, but height specified, a block level HTML element is rendered, thereby introducing a new line effect. If width is specified, then, irrespective of the specified value of height, it may not get shorter than the applicable line-height, in user agents that strictly support standards mode HTML.

Code Example(s)

<tr:panelGroupLayout type="horizontal">
  <f:facet name="separator">
    <tr:spacer width="10" height="1"/>
  </f:facet>
  <tr:goLink text="First Link"
             destination="http://myfaces.apache.org"/>
  <tr:goLink text="Second Link"
             destination="http://myfaces.apache.org"/>
  <tr:goLink text="Third Link"
             destination="http://myfaces.apache.org"/>
</tr:panelGroupLayout>

Events

Type Phases Description
org.apache.myfaces.trinidad.event.AttributeChangeEventInvoke Application,
Apply Request Values
Event delivered to describe an attribute change. Attribute change events are not delivered for any programmatic change to a property. They are only delivered when a renderer changes a property without the application's specific request. An example of an attribute change event might include the width of a column that supported client-side resizing.

Attributes

Name Type Supports EL? Description
attributeChangeListenerjavax.el.MethodExpressionOnly EL a method reference to an attribute change listener. Attribute change events are not delivered for any programmatic change to a property. They are only delivered when a renderer changes a property without the application's specific request. An example of an attribute change events might include the width of a column that supported client-side resizing.
bindingorg.apache.myfaces.trinidad.component.core.output.CoreSpacerOnly EL an EL reference that will store the component instance on a bean. This can be used to give programmatic access to a component from a backing bean, or to move creation of the component to a backing bean.
heightStringYes the height of the spacer item.
idStringNo the identifier for the component. The identifier must follow a subset of the syntax allowed in HTML:
  • Must not be a zero-length String.
  • First character must be an ASCII letter (A-Za-z) or an underscore ('_').
  • Subsequent characters must be an ASCII letter or digit (A-Za-z0-9), an underscore ('_'), or a dash ('-').
partialTriggersString[]Yes the IDs of the components that should trigger a partial update. This component will listen on the trigger components. If one of the trigger components receives an event that will cause it to update in some way, this component will request to be updated too.
renderedbooleanYes Default Value: true

whether the component is rendered. When set to false, no output will be delivered for this component (the component will not in any way be rendered, and cannot be made visible on the client). If you want to change a component's rendered attribute from false to true using PPR, set the partialTrigger attribute of its parent component so the parent refreshes and in turn will render this component.
shortDescStringYes the short description of the bean. This text is commonly used by user agents to display tooltip help text.
widthStringYes the width of the spacer item.