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PhabricatorUIExampleRenderController.php
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			<?php

			final class PhabricatorUIExampleRenderController extends PhabricatorController {

			public function shouldAllowPublic() {
			return true;
			}

			public function handleRequest(AphrontRequest $request) {
			$id = $request->getURIData('class');

			$classes = id(new PhutilClassMapQuery())
			->setAncestorClass('PhabricatorUIExample')
			->setSortMethod('getName')
			->execute();

			$nav = new AphrontSideNavFilterView();
			$nav->setBaseURI(new PhutilURI($this->getApplicationURI('view/')));

			$groups = mgroup($classes, 'getCategory');
			ksort($groups);
			foreach ($groups as $group => $group_classes) {
			$nav->addLabel($group);
			foreach ($group_classes as $class => $obj) {
			$name = $obj->getName();
			$nav->addFilter($class, $name);
			}
			}

			$selected = $nav->selectFilter($id, head_key($classes));

			$example = $classes[$selected];
			$example->setRequest($this->getRequest());

			$result = $example->renderExample();
			if ($result instanceof AphrontResponse) {
			// This allows examples to generate dialogs, etc., for demonstration.
			return $result;
			}

			require_celerity_resource('phabricator-ui-example-css');

			$crumbs = $this->buildApplicationCrumbs();
			$crumbs->addTextCrumb($example->getName());

			$note = id(new PHUIInfoView())
			->setTitle(pht('%s (%s)', $example->getName(), get_class($example)))
			->appendChild($example->getDescription())
			->setSeverity(PHUIInfoView::SEVERITY_NODATA);

			$nav->appendChild(
			array(
			$crumbs,
			$note,
			$result,
			));

			return $this->newPage()
			->setTitle($example->getName())
			->appendChild($nav);
			}

			}