| //////////////////////////////////////////////////////////////////////////////// |
| // |
| // Licensed to the Apache Software Foundation (ASF) under one or more |
| // contributor license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright ownership. |
| // The ASF licenses this file to You under the Apache License, Version 2.0 |
| // (the "License"); you may not use this file except in compliance with |
| // the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| package mx.accessibility |
| { |
| |
| import flash.accessibility.Accessibility; |
| import flash.display.DisplayObject; |
| import flash.events.Event; |
| import mx.accessibility.AccConst; |
| import mx.containers.Accordion; |
| import mx.containers.accordionClasses.AccordionHeader; |
| import mx.controls.Button; |
| import mx.core.UIComponent; |
| import mx.core.mx_internal; |
| |
| use namespace mx_internal; |
| |
| /** |
| * AccordionHeaderAccImpl is a subclass of AccessibilityImplementation |
| * which implements accessibility for the AccordionHeader class. |
| * |
| * @langversion 3.0 |
| * @playerversion Flash 9 |
| * @playerversion AIR 1.1 |
| * @productversion Flex 3 |
| */ |
| public class AccordionHeaderAccImpl extends AccImpl |
| { |
| include "../core/Version.as"; |
| |
| //-------------------------------------------------------------------------- |
| // |
| // Class constants |
| // |
| //-------------------------------------------------------------------------- |
| |
| //-------------------------------------------------------------------------- |
| // |
| // Class methods |
| // |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * Enables accessibility in the AccordionHeader class. |
| * |
| * <p>This method is called by application startup code |
| * that is autogenerated by the MXML compiler. |
| * Afterwards, when instances of AccordionHeader are initialized, |
| * their <code>accessibilityImplementation</code> property |
| * will be set to an instance of this class.</p> |
| * |
| * @langversion 3.0 |
| * @playerversion Flash 9 |
| * @playerversion AIR 1.1 |
| * @productversion Flex 3 |
| */ |
| public static function enableAccessibility():void |
| { |
| AccordionHeader.createAccessibilityImplementation = |
| createAccessibilityImplementation; |
| } |
| |
| /** |
| * @private |
| * Creates an AccordionHeader's AccessibilityImplementation object. |
| * This method is called from UIComponent's |
| * initializeAccessibility() method. |
| */ |
| mx_internal static function createAccessibilityImplementation( |
| component:UIComponent):void |
| { |
| component.accessibilityImplementation = |
| new AccordionHeaderAccImpl(component); |
| } |
| |
| //-------------------------------------------------------------------------- |
| // |
| // Constructor |
| // |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * Constructor. |
| * |
| * @param master The UIComponent instance that this AccImpl instance |
| * is making accessible. |
| * |
| * @langversion 3.0 |
| * @playerversion Flash 9 |
| * @playerversion AIR 1.1 |
| * @productversion Flex 3 |
| */ |
| public function AccordionHeaderAccImpl(master:UIComponent) |
| { |
| super(master); |
| |
| role = AccConst.ROLE_SYSTEM_PAGETAB; |
| |
| master.parent.addEventListener("change", eventHandler); |
| master.addEventListener("removed", removedHandler); |
| } |
| |
| //-------------------------------------------------------------------------- |
| // |
| // Overridden properties: AccImpl |
| // |
| //-------------------------------------------------------------------------- |
| |
| //---------------------------------- |
| // eventsToHandle |
| //---------------------------------- |
| |
| /** |
| * @private |
| * Array of events that we should listen for from the master component. |
| */ |
| override protected function get eventsToHandle():Array |
| { |
| return super.eventsToHandle.concat([ "focusDraw" ]); |
| } |
| |
| //-------------------------------------------------------------------------- |
| // |
| // Overridden methods: AccessibilityImplementation |
| // |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * @private |
| * IAccessible method for returning the state of Tab selected. |
| * |
| * @param childID uint |
| * |
| * @return State uint |
| */ |
| override public function get_accState(childID:uint):uint |
| { |
| var accState:uint = getState(childID); |
| |
| var accordion:Accordion = Accordion(master.parent); |
| |
| if (accordion.enabled) |
| { |
| accState |= AccConst.STATE_SYSTEM_SELECTABLE; |
| |
| if (Button(master).selected) |
| accState |= AccConst.STATE_SYSTEM_SELECTED; |
| |
| var index:int = accordion.focusedIndex; |
| if (index >= 0 && master == accordion.getHeaderAt(index)) |
| accState |= AccConst.STATE_SYSTEM_FOCUSED; |
| } |
| else |
| accState |= AccConst.STATE_SYSTEM_UNAVAILABLE; |
| |
| return accState; |
| } |
| |
| /** |
| * @private |
| * IAccessible method for returning the Default Action. |
| * |
| * @param childID uint |
| * |
| * @return name of default action. |
| */ |
| override public function get_accDefaultAction(childID:uint):String |
| { |
| return "Switch"; |
| } |
| |
| //-------------------------------------------------------------------------- |
| // |
| // Overridden methods: AccImpl |
| // |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * @private |
| * method for returning the name of the Tab |
| * which is spoken out by the screen reader. |
| * |
| * @param childID uint |
| * |
| * @return Name String |
| */ |
| override protected function getName(childID:uint):String |
| { |
| var tab:Button = Button(master); |
| |
| if (childID > 0) |
| { |
| var parentAccordion:Accordion = Accordion(master.parent); |
| tab = parentAccordion.getHeaderAt(parentAccordion.focusedIndex); |
| } |
| |
| return tab.label; |
| } |
| |
| //-------------------------------------------------------------------------- |
| // |
| // Overridden event handlers: AccImpl |
| // |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * @private |
| * Override the generic event handler. |
| * All AccImpl must implement this to listen for events |
| * from its master component. |
| */ |
| override protected function eventHandler(event:Event):void |
| { |
| // Let AccImpl class handle the events |
| // that all accessible UIComponents understand. |
| $eventHandler(event); |
| |
| var index:int; |
| |
| switch (event.type) |
| { |
| case "focusDraw": |
| { |
| // event.currentTarget here is the AccordionHeader (a/k/a 'master') |
| index = Accordion(event.currentTarget.parent).focusedIndex; |
| if (index >= 0 && master == Accordion(event.currentTarget.parent).getHeaderAt(index)) |
| { |
| Accessibility.sendEvent(DisplayObject(event.currentTarget), index + 1, |
| AccConst.EVENT_OBJECT_FOCUS, true); |
| } |
| break; |
| } |
| |
| case "change": |
| { |
| // event.currentTarget here is the Accordion (a/k/a 'master.parent') |
| index = Accordion(event.currentTarget).selectedIndex; |
| if (index >= 0 && master == Accordion(event.currentTarget).getHeaderAt(index)) |
| { |
| Accessibility.sendEvent(master, index + 1, |
| AccConst.EVENT_OBJECT_SELECTION, true); |
| } |
| break; |
| } |
| } |
| } |
| |
| /** |
| * @private |
| * Remove the change handler on the accordion that was causing this to stick around in memory |
| * and cause RTE. Also remove self. |
| */ |
| protected function removedHandler(event:Event):void |
| { |
| master.parent.removeEventListener("change", eventHandler); |
| master.removeEventListener("removed", removedHandler); |
| } |
| |
| } |
| |
| } |