1 #ifndef __DALI_ACCESSIBILITY_ACTION_HANDLER_H__
2 #define __DALI_ACCESSIBILITY_ACTION_HANDLER_H__
5 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
23 namespace Dali DALI_IMPORT_API
27 * AccessibilityActionHandler is an abstract interface, used by Dali to handle accessibility actions
28 * passed by the accessibility manager.
30 class AccessibilityActionHandler
35 * Change the accessibility status when Accessibility feature(screen-reader) turned on or off.
36 * @return whether the status is changed or not.
38 virtual bool ChangeAccessibilityStatus() = 0;
41 * Clear the accessibility focus from the current focused actor.
42 * @return whether the focus is cleared or not.
44 virtual bool ClearAccessibilityFocus() = 0;
47 * Perform the accessibility action to move focus to the previous focusable actor (by one finger flick up).
48 * @param allowEndFeedback true if end of list feedback should be played when the focus is alread reached to the end
49 * @return whether the accessibility action is performed or not.
51 virtual bool AccessibilityActionPrevious(bool allowEndFeedback) = 0;
54 * Perform the accessibility action to move focus to the next focusable actor (by one finger flick down).
55 * @param allowEndFeedback true if end of list feedback should be played when the focus is alread reached to the end
56 * @return whether the accessibility action is performed or not.
58 virtual bool AccessibilityActionNext(bool allowEndFeedback) = 0;
61 * Perform the accessibility action to move focus to the previous focusable actor (by one finger flick left).
62 * @param allowEndFeedback true if end of list feedback should be played when the focus is alread reached to the end
63 * @return whether the accessibility action is performed or not.
65 virtual bool AccessibilityActionReadPrevious(bool allowEndFeedback) = 0;
68 * Perform the accessibility action to move focus to the next focusable actor (by one finger flick right).
69 * @param allowEndFeedback true if end of list feedback should be played when the focus is alread reached to the end
70 * @return whether the accessibility action is performed or not.
72 virtual bool AccessibilityActionReadNext(bool allowEndFeedback) = 0;
75 * Perform the accessibility action to focus and read the actor (by one finger tap or move).
76 * @param allowReadAgain true if the action read again the same object (i.e. read action)
77 * false if the action just read when the focus object is changed (i.e. over action)
78 * @return whether the accessibility action is performed or not.
80 virtual bool AccessibilityActionRead(bool allowReadAgain) = 0;
83 * Perform the accessibility action to activate the current focused actor (by one finger double tap).
84 * @return whether the accessibility action is performed or not.
86 virtual bool AccessibilityActionActivate() = 0;
89 * Perform the accessibility action to change the value when the current focused actor is a slider
90 * (by double finger down and move up and right).
91 * @return whether the accessibility action is performed or not.
93 virtual bool AccessibilityActionUp() = 0;
96 * Perform the accessibility action to change the value when the current focused actor is a slider
97 * (by double finger down and move down and left).
98 * @return whether the accessibility action is performed or not.
100 virtual bool AccessibilityActionDown() = 0;
103 * Perform the accessibility action to navigate back (by two fingers circle draw).
104 * @return whether the accessibility action is performed or not.
106 virtual bool AccessibilityActionBack() = 0;
109 * Perform the accessibility action to mouse move (by one finger tap & hold and move).
110 * @param touchEvent touch event structure
111 * @return whether the accessibility action is performed or not.
113 virtual bool AccessibilityActionTouch(const Dali::TouchEvent& touchEvent) = 0;
115 }; // class AccessibilityActionHandler
119 #endif // __DALI_ACCESSIBILITY_ACTION_HANDLER_H__