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-rw-r--r--framework/Web/UI/ActiveControls/TActiveDataList.php107
1 files changed, 107 insertions, 0 deletions
diff --git a/framework/Web/UI/ActiveControls/TActiveDataList.php b/framework/Web/UI/ActiveControls/TActiveDataList.php
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+++ b/framework/Web/UI/ActiveControls/TActiveDataList.php
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+<?php
+/**
+ * TActiveDataList class
+ *
+ * TActiveDataList represents a data bound and updatable grid control which is the
+ * active counterpart to the original {@link TDataList} control.
+ *
+ * This component can be used in the same way as the regular datalist, the only
+ * difference is that the active datalist uses callbacks instead of postbacks
+ * for interaction.
+ *
+ * Please refer to the original documentation of the regular counterparts for usage.
+ *
+ * @author Marcos Aurelio Nobre <marconobre@gmail.com>
+ * @package System.Web.UI.ActiveControls
+ */
+class TActiveDataList extends TDataList implements IActiveControl {
+
+ /**
+ * Creates a new callback control, sets the adapter to
+ * TActiveControlAdapter.
+ */
+ public function __construct()
+ {
+ parent::__construct();
+ $this->setAdapter(new TActiveControlAdapter($this));
+ }
+
+ /**
+ * @return TBaseActiveControl standard active control options.
+ */
+ public function getActiveControl()
+ {
+ return $this->getAdapter()->getBaseActiveControl();
+ }
+
+ /**
+ * Sets the data source object associated with the repeater control.
+ * In addition, the render method of all connected pagers is called so they
+ * get updated when the data source is changed. Also the repeater registers
+ * itself for rendering in order to get it's content replaced on client side.
+ * @param Traversable|array|string data source object
+ */
+ public function setDataSource($value)
+ {
+ parent::setDataSource($value);
+ if($this->getActiveControl()->canUpdateClientSide()) {
+ $this->renderPager();
+ $this->getPage()->getAdapter()->registerControlToRender($this,$this->getResponse()->createHtmlWriter());
+ }
+ }
+
+ /**
+ * Returns the id of the surrounding container (span).
+ * @return string container id
+ */
+ protected function getContainerID()
+ {
+ return $this->ClientID.'_Container';
+ }
+
+ /**
+ * Renders the repeater.
+ * If the repeater did not pass the prerender phase yet, it will register itself for rendering later.
+ * Else it will call the {@link renderRepeater()} method which will do the rendering of the repeater.
+ * @param THtmlWriter writer for the rendering purpose
+ */
+ public function render($writer)
+ {
+ if($this->getHasPreRendered()) {
+ $this->renderDataList($writer);
+ if($this->getActiveControl()->canUpdateClientSide()) $this->getPage()->getCallbackClient()->replaceContent($this->getContainerID(),$writer);
+ }
+ else {
+ $this->getPage()->getAdapter()->registerControlToRender($this,$writer);
+ }
+ }
+
+ /**
+ * Loops through all {@link TActivePager} on the page and registers the ones which are set to paginate
+ * the repeater for rendering. This is to ensure that the connected pagers are also rendered if the
+ * data source changed.
+ */
+ private function renderPager()
+ {
+ $pager=$this->getPage()->findControlsByType('TActivePager', false);
+ foreach($pager as $item)
+ {
+ if($item->ControlToPaginate==$this->ID) {
+ $writer=$this->getResponse()->createHtmlWriter();
+ $this->getPage()->getAdapter()->registerControlToRender($item,$writer);
+ }
+ }
+ }
+
+ /**
+ * Renders the repeater by writing a span tag with the container id obtained from {@link getContainerID()}
+ * which will be called by the replacement method of the client script to update it's content.
+ * @param THtmlWriter writer for the rendering purpose
+ */
+ private function renderDataList($writer)
+ {
+ $writer->write('<span id="'.$this->getContainerID().'">');
+ parent::render($writer);
+ $writer->write('</span>');
+ }
+}