PHP Class Prado\Web\UI\WebControls\TConditional

TConditional displays appropriate content based on the evaluation result of a PHP expression specified via {@link setCondition Condition}. If the result is true, it instantiates the template {@link getTrueTemplate TrueTemplate}; otherwise, the template {@link getFalseTemplate FalseTemplate} is instantiated. The PHP expression is evaluated right before {@link onInit} stage of the control lifecycle. Since {@link setCondition Condition} is evaluated at a very early stage, it is recommended you set {@link setCondition Condition} in template and the expression should not refer to objects that are available on or after {@link onInit} lifecycle. A typical usage of TConditional is shown as following:



  
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TConditional is very light. It instantiates either {@link getTrueTemplate TrueTemplate} or {@link getFalseTemplate FalseTemplate}, but never both. And the condition is evaluated only once.

Since: 3.1.1

Author: Qiang Xue ([email protected])

Inheritance: extends Prado\Web\UI\TControl

显示文件 Open project: pradosoft/prado

Public Methods

Method	Description
addParsedObject ( $object )	Processes an object that is created during parsing template.
createChildControls ( )	Creates child controls.
getCondition ( ) : string
getFalseTemplate ( ) : Prado\Web\UI\ITemplate
getTrueTemplate ( ) : Prado\Web\UI\ITemplate
setCondition ( $value )	Sets the PHP expression to be evaluated for conditionally displaying content.
setFalseTemplate ( Prado\Web\UI\ITemplate $value )
setTrueTemplate ( Prado\Web\UI\ITemplate $value )

Method Details

addParsedObject() public method

This method overrides the parent implementation by removing all contents enclosed in the template tag.

createChildControls() public method

This method overrides the parent implementation. It evaluates {@link getCondition Condition} and instantiate the corresponding template.

public createChildControls ( )

getCondition() public method

public getCondition ( ) : string
return	string	the PHP expression used for determining which template to use. Defaults to 'true', meaning using TrueTemplate.

getFalseTemplate() public method

public getFalseTemplate ( ) : Prado\Web\UI\ITemplate
return	Prado\Web\UI\ITemplate	the template applied when {@link getCondition Condition} is false.

getTrueTemplate() public method

public getTrueTemplate ( ) : Prado\Web\UI\ITemplate
return	Prado\Web\UI\ITemplate	the template applied when {@link getCondition Condition} is true.

setCondition() public method

The context of the expression is the template control containing TConditional.

public setCondition ( $value )

setFalseTemplate() public method

public setFalseTemplate ( Prado\Web\UI\ITemplate $value )
$value	Prado\Web\UI\ITemplate

setTrueTemplate() public method

public setTrueTemplate ( Prado\Web\UI\ITemplate $value )
$value	Prado\Web\UI\ITemplate