The Common-Controls Tag Library

<ctrl:multilevelselect>

The tag generates a select element. The number of select boxes is specified by the level-attribute. The values for the select boxes will be provided by an option list which is defined within the tag body. Therefore the <base:options>-Tag should be used. The multilevel select allows to select values from a hierarchical structure. So the <base:options>-Tag should provide a tree structure and the level-attribute should be set to the depth of this tree.
../images/images/multilevelselect.gif

Body content: JSP
Tag class: MultiLevelSelectTag
 

[ Syntax ]

Standard Syntax
<ctrl:multilevelselect
[ disabled = "boolean" ]
[ id = "String" ]
[ levels = "Integer" ]
[ name = "String" ]
[ onblur = "String" ]
[ onchange = "String" ]
[ onclick = "String" ]
[ oncontextmenu = "String" ]
[ ondblclick = "String" ]
[ onfocus = "String" ]
[ onkeydown = "String" ]
[ onkeypress = "String" ]
[ onkeyup = "String" ]
[ onmousedown = "String" ]
[ onmousemove = "String" ]
[ onmouseout = "String" ]
[ onmouseover = "String" ]
[ onmouseup = "String" ]
[ property = "String" ]
[ scope = "{any | page | request | session | application}" ]
[ selectableProperty = "String" ]
[ size = "Integer" ]
[ style = "String" ]
[ styleId = "String" ]
[ tabindex = "Integer" ]
[ tooltip = "String" ]
[ value = "String" ]
>
...Body Content...

</ctrl:multilevelselect>
 

[ Attributes ]

AttributeTypeDescriptionReq.RTExp
disabledboolean This attribute can be used to disable the control element. It then does not accept any user inputs and does not generate any control element events.  
idString The name of a page scope JSP bean that will contain the current element. Using the given Id, the variable can be accessed in scripting expressions in the tag Body. The id mus be a string lteral because the JSP compiler generates a variable withthis name at compile time

Annotation: A valid Java identifier must be given.

 
levelsInteger Specifies the hierarchy level and the number of select boxes displayed. If the depth of the tree is greater then the number specified for the levels to display then the last select element will contain all the rest of the items within the tree structure.  
nameString Specifies the name of the Java-Bean. The Java-Bean must be stored in the given scope.

When the tag is surrounded by a Struts <html:form> tag, no Bean Name need be specified. In this case, the Java-Bean is drawn via a property of the Struts Form Bean.

Annotation: A valid Java identifier must be given.

 
onblurString Fires when the object loses the input focus.

Annotation: JavaScript Code

 
onchangeString Fires when the contents of the object or selection have changed.

Annotation: JavaScript Code

 
onclickString Fires when the user clicks the left mouse button on the object.

Annotation: JavaScript Code

 
oncontextmenuString Fires when the user clicks the right mouse button in the client area, opening the context menu.

Annotation: JavaScript Code

 
ondblclickString Fires when the user double-clicks the object.

Annotation: JavaScript Code

 
onfocusString Fires when the object receives focus.

Annotation: JavaScript Code

 
onkeydownString Fires when the user presses a key.

Annotation: JavaScript Code

 
onkeypressString Fires when the user presses an alphanumeric key.

Annotation: JavaScript Code

 
onkeyupString Fires when the user releases a key.

Annotation: JavaScript Code

 
onmousedownString Fires when the user clicks the object with either mouse button.

Annotation: JavaScript Code

 
onmousemoveString Fires when the user moves the mouse over the object.

Annotation: JavaScript Code

 
onmouseoutString Fires when the user moves the mouse pointer outside the boundaries of the object.

Annotation: JavaScript Code

 
onmouseoverString Fires when the user moves the mouse pointer into the object.

Annotation: JavaScript Code

 
onmouseupString Fires when the user releases a mouse button while the mouse is over the object.

Annotation: JavaScript Code

 
propertyString Specifies the name of the property using which the Java-Bean is to be accessed. This is generally only necessary when the Java-Bean is associated with a Struts Form Bean.

Annotation: A valid Java identifier must be given.

 
scopeHTTPScope This attribute shows the Scope in which the Java-Bean with the actual display data can be found.
  • any = The Bean is searched for in ever Scope.
  • page = The Bean exists as a local variable in the JSP Page.
  • request = The Bean is in the HTTP-Request.
  • session = The Bean is in the HTTP-Session.
  • application = The Bean is in the Servletkontext.
 
selectablePropertyString Specifies the name of the property which determines if a node can be selected by the user. Each group within the tree needs to implement a corresponding getter method which has to return an Boolean value.  
sizeInteger The number of visible options.  
styleString An HTML-style can be directly specified with this attribute.

Annotation: See HTML documentation for the attribute style.

 
styleIdString The HTML-id attribute of the element can be specified with this attribute.

Annotation: See HTML documentation for the Attribute id.

 
tabindexInteger Tabulator Index for this element.  
tooltipString A short descriptive text that is displayed when the user moves the mouse over the element.

The character string is HTML-encoded before outputting.

 
valueString This attribute sets the initial displayed value of the field if it displays a textual or numerical value.

Annotation: See HTML documentation for the attribute value.

 

[ Example ]

A multilevel select element


<%@ taglib uri="http://www.common-controls.com/cc/tags-ctrl"    prefix="ctrl" %>
<%@ taglib uri="http://www.common-controls.com/cc/tags-base"   prefix="base" %>

<ctrl:multilevelselect name="mybean" property="region" levels="3">
   <base:options  property="regionOptions"/>
</ctrl:multilevelselect>