1 #ifndef __DALI_ACCESSIBILITY_ACTION_HANDLER_H__
2 #define __DALI_ACCESSIBILITY_ACTION_HANDLER_H__
5 * Copyright (c) 2015 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.
22 #include <dali/public-api/common/dali-common.h>
23 #include <dali/public-api/events/touch-event.h>
29 * AccessibilityActionHandler is an abstract interface, used by Dali to handle accessibility actions
30 * passed by the accessibility manager.
32 class AccessibilityActionHandler
37 * Change the accessibility status when Accessibility feature(screen-reader) turned on or off.
38 * @return whether the status is changed or not.
40 virtual bool ChangeAccessibilityStatus() = 0;
43 * Clear the accessibility focus from the current focused actor.
44 * @return whether the focus is cleared or not.
46 virtual bool ClearAccessibilityFocus() = 0;
49 * Perform the accessibility action to move focus to the previous focusable actor (by one finger flick up).
50 * @param allowEndFeedback true if end of list feedback should be played when the focus is alread reached to the end
51 * @return whether the accessibility action is performed or not.
53 virtual bool AccessibilityActionPrevious(bool allowEndFeedback) = 0;
56 * Perform the accessibility action to move focus to the next focusable actor (by one finger flick down).
57 * @param allowEndFeedback true if end of list feedback should be played when the focus is alread reached to the end
58 * @return whether the accessibility action is performed or not.
60 virtual bool AccessibilityActionNext(bool allowEndFeedback) = 0;
63 * Perform the accessibility action to move focus to the previous focusable actor (by one finger flick left).
64 * @param allowEndFeedback true if end of list feedback should be played when the focus is alread reached to the end
65 * @return whether the accessibility action is performed or not.
67 virtual bool AccessibilityActionReadPrevious(bool allowEndFeedback) = 0;
70 * Perform the accessibility action to move focus to the next focusable actor (by one finger flick right).
71 * @param allowEndFeedback true if end of list feedback should be played when the focus is alread reached to the end
72 * @return whether the accessibility action is performed or not.
74 virtual bool AccessibilityActionReadNext(bool allowEndFeedback) = 0;
77 * Perform the accessibility action to focus and read the actor (by one finger tap or move).
78 * @param allowReadAgain true if the action read again the same object (i.e. read action)
79 * false if the action just read when the focus object is changed (i.e. over action)
80 * @return whether the accessibility action is performed or not.
82 virtual bool AccessibilityActionRead(bool allowReadAgain) = 0;
85 * Perform the accessibility action to activate the current focused actor (by one finger double tap).
86 * @return whether the accessibility action is performed or not.
88 virtual bool AccessibilityActionActivate() = 0;
91 * Perform the accessibility action to change the value when the current focused actor is a slider
92 * (by double finger down and move up and right).
93 * @return whether the accessibility action is performed or not.
95 virtual bool AccessibilityActionUp() = 0;
98 * Perform the accessibility action to change the value when the current focused actor is a slider
99 * (by double finger down and move down and left).
100 * @return whether the accessibility action is performed or not.
102 virtual bool AccessibilityActionDown() = 0;
105 * Perform the accessibility action to navigate back (by two fingers circle draw).
106 * @return whether the accessibility action is performed or not.
108 virtual bool AccessibilityActionBack() = 0;
111 * Perform the accessibility action to mouse move (by one finger tap & hold and move).
112 * @param touchEvent touch event structure
113 * @return whether the accessibility action is performed or not.
115 virtual bool AccessibilityActionTouch(const Dali::TouchEvent& touchEvent) = 0;
117 }; // class AccessibilityActionHandler
121 #endif // __DALI_ACCESSIBILITY_ACTION_HANDLER_H__