NEW Added WidgetPageExtension

code/extension/WidgetPageExtension.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * Adds a single {@link WidgetArea} called "SideBar" to {@link Page} classes.
+ * Adjust your templates to render the resulting
+ * {@link WidgetArea} as required, through the $SideBarView placeholder.
+ *
+ * This extension is just an example on how to use the widgets functionality,
+ * feel free to create your own relationships, naming conventions, etc.
+ * without using this class.
+ */
+class WidgetPageExtension extends DataExtension {
+
+	static $db = array(
+		'InheritSideBar' => 'Boolean',
+	);
+
+	static $defaults = array(
+		'InheritSideBar' => true
+	);
+
+	static $has_one = array(
+		'SideBar' => 'WidgetArea'
+	);
+
+	function updateCMSFields(FieldList $fields) {
+		$fields->addFieldToTab(
+			"Root.Widgets", 
+			new CheckboxField("InheritSideBar", 'Inherit Sidebar From Parent')
+		);
+		$fields->addFieldToTab(
+			"Root.Widgets", 
+			new WidgetAreaEditor("SideBar")
+		);
+	}
+
+	/**
+	 * @return WidgetArea
+	 */
+	function SideBarView() {
+		if(
+			$this->owner->InheritSideBar 
+			&& $this->owner->getParent() 
+			&& $this->owner->getParent()->hasMethod('SideBar')
+		) {
+			return $this->owner->getParent()->SideBar();
+		} elseif($this->owner->SideBar()->exists()){
+			return $this->owner->SideBar();
+		}
+	}
+
+}