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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo
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Roy Tam
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266
widget/gonk/libui/PointerController.h
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266
widget/gonk/libui/PointerController.h
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/*
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* Copyright (C) 2010 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 _UI_POINTER_CONTROLLER_H
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#define _UI_POINTER_CONTROLLER_H
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#include "SpriteController.h"
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#include <ui/DisplayInfo.h>
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#include "Input.h"
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#include <utils/BitSet.h>
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#include <utils/RefBase.h>
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#include <utils/Looper.h>
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#include <utils/String8.h>
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#include <SkBitmap.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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/*
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* Pointer resources.
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*/
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struct PointerResources {
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SpriteIcon spotHover;
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SpriteIcon spotTouch;
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SpriteIcon spotAnchor;
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};
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/*
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* Pointer controller policy interface.
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*
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* The pointer controller policy is used by the pointer controller to interact with
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* the Window Manager and other system components.
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*
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* The actual implementation is partially supported by callbacks into the DVM
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* via JNI. This interface is also mocked in the unit tests.
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*/
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class PointerControllerPolicyInterface : public virtual RefBase {
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protected:
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PointerControllerPolicyInterface() { }
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virtual ~PointerControllerPolicyInterface() { }
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public:
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virtual void loadPointerResources(PointerResources* outResources) = 0;
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};
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/*
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* Tracks pointer movements and draws the pointer sprite to a surface.
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*
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* Handles pointer acceleration and animation.
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*/
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class PointerController : public PointerControllerInterface, public MessageHandler {
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protected:
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virtual ~PointerController();
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public:
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enum InactivityTimeout {
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INACTIVITY_TIMEOUT_NORMAL = 0,
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INACTIVITY_TIMEOUT_SHORT = 1,
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};
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PointerController(const sp<PointerControllerPolicyInterface>& policy,
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const sp<Looper>& looper, const sp<SpriteController>& spriteController);
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virtual bool getBounds(float* outMinX, float* outMinY,
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float* outMaxX, float* outMaxY) const;
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virtual void move(float deltaX, float deltaY);
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virtual void setButtonState(int32_t buttonState);
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virtual int32_t getButtonState() const;
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virtual void setPosition(float x, float y);
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virtual void getPosition(float* outX, float* outY) const;
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virtual void fade(Transition transition);
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virtual void unfade(Transition transition);
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virtual void setPresentation(Presentation presentation);
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virtual void setSpots(const PointerCoords* spotCoords,
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const uint32_t* spotIdToIndex, BitSet32 spotIdBits);
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virtual void clearSpots();
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void setDisplayViewport(int32_t width, int32_t height, int32_t orientation);
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void setPointerIcon(const SpriteIcon& icon);
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void setInactivityTimeout(InactivityTimeout inactivityTimeout);
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private:
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static const size_t MAX_RECYCLED_SPRITES = 12;
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static const size_t MAX_SPOTS = 12;
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enum {
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MSG_ANIMATE,
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MSG_INACTIVITY_TIMEOUT,
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};
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struct Spot {
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static const uint32_t INVALID_ID = 0xffffffff;
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uint32_t id;
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sp<Sprite> sprite;
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float alpha;
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float scale;
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float x, y;
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inline Spot(uint32_t id, const sp<Sprite>& sprite)
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: id(id), sprite(sprite), alpha(1.0f), scale(1.0f),
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x(0.0f), y(0.0f), lastIcon(NULL) { }
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void updateSprite(const SpriteIcon* icon, float x, float y);
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private:
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const SpriteIcon* lastIcon;
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};
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mutable Mutex mLock;
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sp<PointerControllerPolicyInterface> mPolicy;
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sp<Looper> mLooper;
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sp<SpriteController> mSpriteController;
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sp<WeakMessageHandler> mHandler;
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PointerResources mResources;
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struct Locked {
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bool animationPending;
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nsecs_t animationTime;
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int32_t displayWidth;
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int32_t displayHeight;
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int32_t displayOrientation;
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InactivityTimeout inactivityTimeout;
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Presentation presentation;
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bool presentationChanged;
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int32_t pointerFadeDirection;
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float pointerX;
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float pointerY;
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float pointerAlpha;
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sp<Sprite> pointerSprite;
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SpriteIcon pointerIcon;
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bool pointerIconChanged;
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int32_t buttonState;
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Vector<Spot*> spots;
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Vector<sp<Sprite> > recycledSprites;
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} mLocked;
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bool getBoundsLocked(float* outMinX, float* outMinY, float* outMaxX, float* outMaxY) const;
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void setPositionLocked(float x, float y);
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void handleMessage(const Message& message);
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void doAnimate();
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void doInactivityTimeout();
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void startAnimationLocked();
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void resetInactivityTimeoutLocked();
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void removeInactivityTimeoutLocked();
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void updatePointerLocked();
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Spot* getSpotLocked(uint32_t id);
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Spot* createAndAddSpotLocked(uint32_t id);
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Spot* removeFirstFadingSpotLocked();
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void releaseSpotLocked(Spot* spot);
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void fadeOutAndReleaseSpotLocked(Spot* spot);
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void fadeOutAndReleaseAllSpotsLocked();
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void loadResources();
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};
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} // namespace android
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#endif // _UI_POINTER_CONTROLLER_H
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