2 * Copyright (C) 2014 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef _INPUTFLINGER_POINTER_CONTROLLER_INTERFACE_H
18 #define _INPUTFLINGER_POINTER_CONTROLLER_INTERFACE_H
20 #include <input/Input.h>
21 #include <utils/BitSet.h>
22 #include <utils/RefBase.h>
27 * Interface for tracking a mouse / touch pad pointer and touch pad spots.
29 * The spots are sprites on screen that visually represent the positions of
32 * The pointer controller is responsible for providing synchronization and for tracking
33 * display orientation changes if needed.
35 class PointerControllerInterface : public virtual RefBase {
37 PointerControllerInterface() { }
38 virtual ~PointerControllerInterface() { }
41 /* Gets the bounds of the region that the pointer can traverse.
42 * Returns true if the bounds are available. */
43 virtual bool getBounds(float* outMinX, float* outMinY,
44 float* outMaxX, float* outMaxY) const = 0;
46 /* Move the pointer. */
47 virtual void move(float deltaX, float deltaY) = 0;
49 /* Sets a mask that indicates which buttons are pressed. */
50 virtual void setButtonState(int32_t buttonState) = 0;
52 /* Gets a mask that indicates which buttons are pressed. */
53 virtual int32_t getButtonState() const = 0;
55 /* Sets the absolute location of the pointer. */
56 virtual void setPosition(float x, float y) = 0;
58 /* Gets the absolute location of the pointer. */
59 virtual void getPosition(float* outX, float* outY) const = 0;
62 // Fade/unfade immediately.
64 // Fade/unfade gradually.
68 /* Fades the pointer out now. */
69 virtual void fade(Transition transition) = 0;
71 /* Makes the pointer visible if it has faded out.
72 * The pointer never unfades itself automatically. This method must be called
73 * by the client whenever the pointer is moved or a button is pressed and it
74 * wants to ensure that the pointer becomes visible again. */
75 virtual void unfade(Transition transition) = 0;
78 // Show the mouse pointer.
80 // Show spots and a spot anchor in place of the mouse pointer.
84 /* Sets the mode of the pointer controller. */
85 virtual void setPresentation(Presentation presentation) = 0;
87 /* Sets the spots for the current gesture.
88 * The spots are not subject to the inactivity timeout like the pointer
89 * itself it since they are expected to remain visible for so long as
90 * the fingers are on the touch pad.
92 * The values of the AMOTION_EVENT_AXIS_PRESSURE axis is significant.
93 * For spotCoords, pressure != 0 indicates that the spot's location is being
94 * pressed (not hovering).
96 virtual void setSpots(const PointerCoords* spotCoords, const uint32_t* spotIdToIndex,
97 BitSet32 spotIdBits) = 0;
99 /* Removes all spots. */
100 virtual void clearSpots() = 0;
103 } // namespace android
105 #endif // _INPUTFLINGER_POINTER_CONTROLLER_INTERFACE_H