## Class TActiveDropDownList

Description

Implements interfaces:

- ICallbackEventHandler
- IActiveControl

TActiveDropDownList class.

The active control counter part to drop down list control. The AutoPostBack property is set to true by default. Thus, when the drop down list selection is changed the OnCallback event is raised after OnSelectedIndexChanged event.

With ActiveControl.EnabledUpdate set to true (default is true), changes to the selection, after OnLoad event has been raised, will be updated. on the client side.

List items can be changed dynamically during a callback request.

- since: 3.1
- version: $Id: TActiveDropDownList.php 2089 2007-07-26 15:27:25Z carl $
- author: Wei Zhuo <weizhuo[at]gmail[dot]com>

Located in /Web/UI/ActiveControls/TActiveDropDownList.php (line 38)

    TComponent
       |
       --TApplicationComponent
          |
          --TControl
             |
             --TWebControl
                |
                --TDataBoundControl
                   |
                   --TListControl
                      |
                      --TDropDownList
                         |
                         --TActiveDropDownList

Method Summary
TActiveDropDownList __construct ()
void addAttributesToRender (mixed $writer)
TActiveListItemCollection createListItemCollection ()
TBaseActiveCallbackControl getActiveControl ()
null getClientClassName ()
TCallbackClientSide getClientSide ()
void onCallback (TCallbackEventParameter $param)
void onPreRender (mixed $param)
void raiseCallbackEvent (TCallbackEventParameter $param)
void renderClientControlScript (mixed $writer)
Methods
Constructor __construct (line 45)

Creates a new callback control, sets the adapter to TActiveListControlAdapter. If you override this class, be sure to set the adapter appropriately by, for example, by calling this constructor.

- access: public

TActiveDropDownList __construct ()

Redefinition of:

TControl::__construct()
  Constructor.

addAttributesToRender (line 104)

Ensure that the ID attribute is rendered and registers the javascript code for initializing the active control.

- access: protected

void addAttributesToRender (mixed $writer)

Redefinition of:

TDropDownList::addAttributesToRender()
  Adds attributes to renderer.

createListItemCollection (line 85)

Creates a collection object to hold list items. A specialized TActiveListItemCollection is created to allow the drop down list options to be added.

This method may be overriden to create a customized collection.

- return: the collection object
- access: protected

TActiveListItemCollection createListItemCollection ()

Redefinition of:

TListControl::createListItemCollection()
  Creates a collection object to hold list items.

getActiveControl (line 55)

- return: standard callback control options.
- access: public

TBaseActiveCallbackControl getActiveControl ()
getClientClassName (line 73)

No client class for this control.

This method overrides the parent implementation.

- return: no javascript class name.
- access: protected

null getClientClassName ()

Redefinition of:

TDropDownList::getClientClassName()
  Gets the name of the javascript class responsible for performing postback for this control.

getClientSide (line 63)

- return: client side request options.
- access: public

TCallbackClientSide getClientSide ()
onCallback (line 130)

This method is invoked when a callback is requested. The method raises 'OnCallback' event to fire up the event handlers. If you override this method, be sure to call the parent implementation so that the event handler can be invoked.

- access: public

void onCallback (TCallbackEventParameter $param)

- TCallbackEventParameter $param: event parameter to be passed to the event handlers

onPreRender (line 138)

Updates the client-side options if the item list has changed after the OnLoad event.

- access: public

void onPreRender (mixed $param)

Redefinition of:

TDataBoundControl::onPreRender()
  Ensures any pending databind is performed.

raiseCallbackEvent (line 118)

Raises the callback event. This method is required by ICallbackEventHandler interface.

This method is mainly used by framework and control developers.

- access: public

void raiseCallbackEvent (TCallbackEventParameter $param)

- TCallbackEventParameter $param: the event parameter

renderClientControlScript (line 96)

Override parent implementation, no javascript is rendered here instead the javascript required for active control is registered in addAttributesToRender.

- access: protected

void renderClientControlScript (mixed $writer)

Redefinition of:

TListControl::renderClientControlScript()
  Renders the javascript for list control.

#### Inherited Methods

Inherited From TDropDownList

> TDropDownList::addAttributesToRender()
> TDropDownList::getClientClassName()
> TDropDownList::getDataChanged()
> TDropDownList::getValidationPropertyValue()
> TDropDownList::loadPostData()
> TDropDownList::raisePostDataChangedEvent()
> TDropDownList::setSelectedIndices()

Inherited From TListControl

> TListControl::addAttributesToRender()
> TListControl::addParsedObject()
> TListControl::clearSelection()
> TListControl::createListItemCollection()
> TListControl::formatDataValue()
> TListControl::getAppendDataBoundItems()
> TListControl::getAutoPostBack()
> TListControl::getCausesValidation()
> TListControl::getClientClassName()
> TListControl::getData()
> TListControl::getDataGroupField()
> TListControl::getDataTextField()
> TListControl::getDataTextFormatString()
> TListControl::getDataValueField()
> TListControl::getEnableClientScript()
> TListControl::getHasItems()
> TListControl::getIsMultiSelect()
> TListControl::getItemCount()
> TListControl::getItems()
> TListControl::getPostBackOptions()
> TListControl::getPromptText()
> TListControl::getPromptValue()
> TListControl::getSelectedIndex()
> TListControl::getSelectedIndices()
> TListControl::getSelectedItem()
> TListControl::getSelectedValue()
> TListControl::getSelectedValues()
> TListControl::getTagName()
> TListControl::getText()
> TListControl::getValidationGroup()
> TListControl::loadState()
> TListControl::onSelectedIndexChanged()
> TListControl::onTextChanged()
> TListControl::performDataBinding()
> TListControl::renderClientControlScript()
> TListControl::renderContents()
> TListControl::renderPrompt()
> TListControl::saveState()
> TListControl::setAppendDataBoundItems()
> TListControl::setAutoPostBack()
> TListControl::setCausesValidation()
> TListControl::setData()
> TListControl::setDataGroupField()
> TListControl::setDataTextField()
> TListControl::setDataTextFormatString()
> TListControl::setDataValueField()
> TListControl::setEnableClientScript()
> TListControl::setPromptText()
> TListControl::setPromptValue()
> TListControl::setSelectedIndex()
> TListControl::setSelectedIndices()
> TListControl::setSelectedValue()
> TListControl::setSelectedValues()
> TListControl::setText()
> TListControl::setValidationGroup()

Inherited From TDataBoundControl

> TDataBoundControl::createPagedDataSource()
> TDataBoundControl::dataBind()
> TDataBoundControl::dataSourceViewChanged()
> TDataBoundControl::determineDataSource()
> TDataBoundControl::ensureDataBound()
> TDataBoundControl::getAllowCustomPaging()
> TDataBoundControl::getAllowPaging()
> TDataBoundControl::getCurrentPageIndex()
> TDataBoundControl::getDataMember()
> TDataBoundControl::getDataSource()
> TDataBoundControl::getDataSourceID()
> TDataBoundControl::getDataSourceView()
> TDataBoundControl::getInitialized()
> TDataBoundControl::getIsDataBound()
> TDataBoundControl::getPageCount()
> TDataBoundControl::getPageSize()
> TDataBoundControl::getRequiresDataBinding()
> TDataBoundControl::getSelectParameters()
> TDataBoundControl::getUsingDataSourceID()
> TDataBoundControl::getVirtualItemCount()
> TDataBoundControl::onDataBound()
> TDataBoundControl::onDataSourceChanged()
> TDataBoundControl::onInit()
> TDataBoundControl::onPreRender()
> TDataBoundControl::pagePreLoad()
> TDataBoundControl::performDataBinding()
> TDataBoundControl::setAllowCustomPaging()
> TDataBoundControl::setAllowPaging()
> TDataBoundControl::setCurrentPageIndex()
> TDataBoundControl::setDataMember()
> TDataBoundControl::setDataSource()
> TDataBoundControl::setDataSourceID()
> TDataBoundControl::setInitialized()
> TDataBoundControl::setIsDataBound()
> TDataBoundControl::setPageSize()
> TDataBoundControl::setRequiresDataBinding()
> TDataBoundControl::setVirtualItemCount()
> TDataBoundControl::validateDataSource()

Inherited From TWebControl

> TWebControl::addAttributesToRender()
> TWebControl::clearStyle()
> TWebControl::copyBaseAttributes()
> TWebControl::createStyle()
> TWebControl::getAccessKey()
> TWebControl::getBackColor()
> TWebControl::getBorderColor()
> TWebControl::getBorderStyle()
> TWebControl::getBorderWidth()
> TWebControl::getCssClass()
> TWebControl::getDisplay()
> TWebControl::getFont()
> TWebControl::getForeColor()
> TWebControl::getHasStyle()
> TWebControl::getHeight()
> TWebControl::getStyle()
> TWebControl::getTabIndex()
> TWebControl::getTagName()
> TWebControl::getToolTip()
> TWebControl::getWidth()
> TWebControl::render()
> TWebControl::renderBeginTag()
> TWebControl::renderContents()
> TWebControl::renderEndTag()
> TWebControl::setAccessKey()
> TWebControl::setBackColor()
> TWebControl::setBorderColor()
> TWebControl::setBorderStyle()
> TWebControl::setBorderWidth()
> TWebControl::setCssClass()
> TWebControl::setDisplay()
> TWebControl::setForeColor()
> TWebControl::setHeight()
> TWebControl::setStyle()
> TWebControl::setTabIndex()
> TWebControl::setToolTip()
> TWebControl::setWidth()

Inherited From TControl

> TControl::__construct()
> TControl::addedControl()
> TControl::addParsedObject()
> TControl::addToPostDataLoader()
> TControl::applyStyleSheetSkin()
> TControl::autoBindProperty()
> TControl::autoDataBindProperties()
> TControl::bindProperty()
> TControl::broadcastEvent()
> TControl::bubbleEvent()
> TControl::clearChildState()
> TControl::clearControlState()
> TControl::clearNamingContainer()
> TControl::clearViewState()
> TControl::convertUniqueIdToClientId()
> TControl::createChildControls()
> TControl::createControlCollection()
> TControl::dataBind()
> TControl::dataBindChildren()
> TControl::dataBindProperties()
> TControl::ensureChildControls()
> TControl::findControl()
> TControl::findControlsByID()
> TControl::findControlsByType()
> TControl::focus()
> TControl::getAdapter()
> TControl::getAllowChildControls()
> TControl::getAttribute()
> TControl::getAttributes()
> TControl::getChildControlsCreated()
> TControl::getClientID()
> TControl::getControls()
> TControl::getControlStage()
> TControl::getControlState()
> TControl::getCustomData()
> TControl::getEnabled()
> TControl::getEnableTheming()
> TControl::getEnableViewState()
> TControl::getHasAdapter()
> TControl::getHasAttributes()
> TControl::getHasChildInitialized()
> TControl::getHasControls()
> TControl::getHasInitialized()
> TControl::getHasLoaded()
> TControl::getHasLoadedPostData()
> TControl::getHasPreRendered()
> TControl::getID()
> TControl::getNamingContainer()
> TControl::getPage()
> TControl::getParent()
> TControl::getRegisteredObject()
> TControl::getSkinID()
> TControl::getSourceTemplateControl()
> TControl::getTemplateControl()
> TControl::getUniqueID()
> TControl::getViewState()
> TControl::getVisible()
> TControl::hasAttribute()
> TControl::initRecursive()
> TControl::isDescendentOf()
> TControl::isObjectRegistered()
> TControl::loadRecursive()
> TControl::loadState()
> TControl::loadStateRecursive()
> TControl::onDataBinding()
> TControl::onInit()
> TControl::onLoad()
> TControl::onPreRender()
> TControl::onUnload()
> TControl::preRenderRecursive()
> TControl::raiseBubbleEvent()
> TControl::registerObject()
> TControl::removeAttribute()
> TControl::removedControl()
> TControl::render()
> TControl::renderChildren()
> TControl::renderControl()
> TControl::saveState()
> TControl::saveStateRecursive()
> TControl::setAdapter()
> TControl::setAttribute()
> TControl::setChildControlsCreated()
> TControl::setControlStage()
> TControl::setControlState()
> TControl::setCustomData()
> TControl::setEnabled()
> TControl::setEnableTheming()
> TControl::setEnableViewState()
> TControl::setID()
> TControl::setPage()
> TControl::setSkinID()
> TControl::setTemplateControl()
> TControl::setViewState()
> TControl::setVisible()
> TControl::trackViewState()
> TControl::traverseChildControls()
> TControl::unbindProperty()
> TControl::unloadRecursive()
> TControl::unregisterObject()
> TControl::__get()

Inherited From TApplicationComponent

> TApplicationComponent::getApplication()
> TApplicationComponent::getRequest()
> TApplicationComponent::getResponse()
> TApplicationComponent::getService()
> TApplicationComponent::getSession()
> TApplicationComponent::getUser()
> TApplicationComponent::publishAsset()
> TApplicationComponent::publishFilePath()

Inherited From TComponent

> TComponent::addParsedObject()
> TComponent::attachEventHandler()
> TComponent::canGetProperty()
> TComponent::canSetProperty()
> TComponent::createdOnTemplate()
> TComponent::detachEventHandler()
> TComponent::evaluateExpression()
> TComponent::evaluateStatements()
> TComponent::getEventHandlers()
> TComponent::getSubProperty()
> TComponent::hasEvent()
> TComponent::hasEventHandler()
> TComponent::hasProperty()
> TComponent::raiseEvent()
> TComponent::setSubProperty()
> TComponent::__get()
> TComponent::__set()

Class Constants

#### Inherited Constants

Inherited from TControl

> TControl::AUTOMATIC_ID_PREFIX
> TControl::CLIENT_ID_SEPARATOR
> TControl::CS_CHILD_INITIALIZED
> TControl::CS_CONSTRUCTED
> TControl::CS_INITIALIZED
> TControl::CS_LOADED
> TControl::CS_PRERENDERED
> TControl::CS_STATE_LOADED
> TControl::ID_FORMAT
> TControl::ID_SEPARATOR
> TControl::IS_CHILD_CREATED
> TControl::IS_CREATING_CHILD
> TControl::IS_DISABLE_THEMING
> TControl::IS_DISABLE_VIEWSTATE
> TControl::IS_ID_SET
> TControl::IS_SKIN_APPLIED
> TControl::IS_STYLESHEET_APPLIED
> TControl::RF_ADAPTER
> TControl::RF_AUTO_BINDINGS
> TControl::RF_CHILD_STATE
> TControl::RF_CONTROLS
> TControl::RF_CONTROLSTATE
> TControl::RF_DATA_BINDINGS
> TControl::RF_EVENTS
> TControl::RF_NAMED_CONTROLS
> TControl::RF_NAMED_CONTROLS_ID
> TControl::RF_NAMED_OBJECTS
> TControl::RF_SKIN_ID

Documentation generated on Mon, 21 Apr 2008 11:29:28 -0400 by phpDocumentor 1.3.0RC4