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Dependancies between renderlets, the clean way

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http://formidable.typo3.ug/pastebin/snippet/110.html

The authors comment: This illustrates the concept of dependancy between renderlets in Formidable.
Renderlets can be declared as dependant of others using dependsOn='rdtname'.
Dependant renderlets can be hidden if the renderlet they depend on is empty using hideIdDependancyEmpty='true'.

Every kind of renderlet may be declared as dependant of another.

The ad-hock repaint is handled via ajax; note the usage of syncValue='true' on the event to automate the refreshing of the value of the current rdt in the ajax context every time onchange is triggered.

For a working example, have a look here: http://formidable.typo3.ug/tutorials/dependancies-the-clean-way.html

Jérôme Schneider, 2010-01-19@10:06:24, pasted:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<formidable version="2.0.407"
	xmlns:renderlet="http://formidable.typo3.ug/xmlns/2.0.407/renderlet">

<elements>
		
		<renderlet:LISTBOX name="animal" label="The animals" addBlank="-- Pick an animal --">
			
			<onchange runat="ajax" syncValue="true" cache="false">
				<userobj>
					<php><![CDATA[
						
						return $this->rdt("animal")->majixRepaintDependancies();

]]></php>
				</userobj>
			</onchange>
			<data>
				<items>
					<item caption="Bird" value="bird" />
					<item caption="Cat" value="cat" />
				</items>
			</data>
		</renderlet:LISTBOX>
		
		
		
		<renderlet:LISTBOX name="name" label="Names" addBlank="-- Pick a buddy --" dependsOn="animal" hideIfDependancyEmpty="true">
			
			<onchange runat="ajax" syncValue="true" cache="false">
				<userobj>
					<php><![CDATA[
						
						return $this->rdt("name")->majixRepaintDependancies();

]]></php>
				</userobj>
			</onchange>
			<data>
				<userobj>
					<php><![CDATA[
						
						$aData = array();
						$sValue = $this->rdt("animal")->getValue();
						
						switch($sValue) {
							case "bird": {
							
								$aData = array(
									"tweetie" => "Tweetie",
									"roadrunner" => "Road Runner",
									"corbeau" => "Maitre Corbeau",
								);
								
								break;
							}
							case "cat": {
							
								$aData = array(
									"felix" => "Felix",
									"garfield" => "Garfield",
									"tom" => "Tom",
								);
								
								break;
							}
						}
						
						return $this->arrayToRdtItems($aData);
						
					]]></php>
				</userobj>
			</data>
		</renderlet:LISTBOX>
		
		
		<renderlet:BOX name="animalsays" mode="strong" dependsOn="name" hideIfDependancyEmpty="true">
			<html>
				<userobj>
					<php><![CDATA[
						
						$sAnimal = $this->rdt("animal")->getValue();
						$sName = $this->rdt("name")->getValue();
						
						return ucfirst($sName) . " the " . ucfirst($sAnimal) . " says hello !";
						
					]]></php>
				</userobj>
			</html>
		</renderlet:BOX>
		
	</elements>

</formidable>

Dependancies between renderlets, the clean way

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