106 lines
3.6 KiB
C
106 lines
3.6 KiB
C
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/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _INPUTFLINGER_POINTER_CONTROLLER_INTERFACE_H
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#define _INPUTFLINGER_POINTER_CONTROLLER_INTERFACE_H
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#include <input/Input.h>
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#include <utils/BitSet.h>
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#include <utils/RefBase.h>
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namespace android {
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/**
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* Interface for tracking a mouse / touch pad pointer and touch pad spots.
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*
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* The spots are sprites on screen that visually represent the positions of
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* fingers
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*
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* The pointer controller is responsible for providing synchronization and for tracking
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* display orientation changes if needed.
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*/
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class PointerControllerInterface : public virtual RefBase {
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protected:
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PointerControllerInterface() { }
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virtual ~PointerControllerInterface() { }
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public:
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/* Gets the bounds of the region that the pointer can traverse.
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* Returns true if the bounds are available. */
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virtual bool getBounds(float* outMinX, float* outMinY,
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float* outMaxX, float* outMaxY) const = 0;
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/* Move the pointer. */
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virtual void move(float deltaX, float deltaY) = 0;
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/* Sets a mask that indicates which buttons are pressed. */
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virtual void setButtonState(int32_t buttonState) = 0;
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/* Gets a mask that indicates which buttons are pressed. */
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virtual int32_t getButtonState() const = 0;
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/* Sets the absolute location of the pointer. */
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virtual void setPosition(float x, float y) = 0;
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/* Gets the absolute location of the pointer. */
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virtual void getPosition(float* outX, float* outY) const = 0;
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enum Transition {
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// Fade/unfade immediately.
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TRANSITION_IMMEDIATE,
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// Fade/unfade gradually.
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TRANSITION_GRADUAL,
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};
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/* Fades the pointer out now. */
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virtual void fade(Transition transition) = 0;
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/* Makes the pointer visible if it has faded out.
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* The pointer never unfades itself automatically. This method must be called
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* by the client whenever the pointer is moved or a button is pressed and it
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* wants to ensure that the pointer becomes visible again. */
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virtual void unfade(Transition transition) = 0;
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enum Presentation {
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// Show the mouse pointer.
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PRESENTATION_POINTER,
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// Show spots and a spot anchor in place of the mouse pointer.
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PRESENTATION_SPOT,
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};
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/* Sets the mode of the pointer controller. */
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virtual void setPresentation(Presentation presentation) = 0;
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/* Sets the spots for the current gesture.
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* The spots are not subject to the inactivity timeout like the pointer
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* itself it since they are expected to remain visible for so long as
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* the fingers are on the touch pad.
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*
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* The values of the AMOTION_EVENT_AXIS_PRESSURE axis is significant.
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* For spotCoords, pressure != 0 indicates that the spot's location is being
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* pressed (not hovering).
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*/
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virtual void setSpots(const PointerCoords* spotCoords, const uint32_t* spotIdToIndex,
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BitSet32 spotIdBits) = 0;
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/* Removes all spots. */
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virtual void clearSpots() = 0;
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};
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} // namespace android
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#endif // _INPUTFLINGER_POINTER_CONTROLLER_INTERFACE_H
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