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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _UI_POINTER_CONTROLLER_H
#define _UI_POINTER_CONTROLLER_H
#include <ui/DisplayInfo.h>
#include <utils/RefBase.h>
#include <utils/String8.h>
#include <surfaceflinger/Surface.h>
#include <surfaceflinger/SurfaceComposerClient.h>
#include <surfaceflinger/ISurfaceComposer.h>
#include <SkBitmap.h>
namespace android {
enum {
POINTER_BUTTON_1 = 1 << 0,
};
/**
* Interface for tracking a single (mouse) pointer.
*
* The pointer controller is responsible for providing synchronization and for tracking
* display orientation changes if needed.
*/
class PointerControllerInterface : public virtual RefBase {
protected:
PointerControllerInterface() { }
virtual ~PointerControllerInterface() { }
public:
/* Gets the bounds of the region that the pointer can traverse.
* Returns true if the bounds are available. */
virtual bool getBounds(float* outMinX, float* outMinY,
float* outMaxX, float* outMaxY) const = 0;
/* Move the pointer. */
virtual void move(float deltaX, float deltaY) = 0;
/* Sets a mask that indicates which buttons are pressed. */
virtual void setButtonState(uint32_t buttonState) = 0;
/* Gets a mask that indicates which buttons are pressed. */
virtual uint32_t getButtonState() const = 0;
/* Sets the absolute location of the pointer. */
virtual void setPosition(float x, float y) = 0;
/* Gets the absolute location of the pointer. */
virtual void getPosition(float* outX, float* outY) const = 0;
};
/*
* Tracks pointer movements and draws the pointer sprite to a surface.
*
* Handles pointer acceleration and animation.
*/
class PointerController : public PointerControllerInterface {
protected:
virtual ~PointerController();
public:
PointerController(int32_t pointerLayer);
virtual bool getBounds(float* outMinX, float* outMinY,
float* outMaxX, float* outMaxY) const;
virtual void move(float deltaX, float deltaY);
virtual void setButtonState(uint32_t buttonState);
virtual uint32_t getButtonState() const;
virtual void setPosition(float x, float y);
virtual void getPosition(float* outX, float* outY) const;
void setDisplaySize(int32_t width, int32_t height);
void setDisplayOrientation(int32_t orientation);
void setPointerIcon(const SkBitmap* bitmap, float hotSpotX, float hotSpotY);
private:
mutable Mutex mLock;
int32_t mPointerLayer;
sp<SurfaceComposerClient> mSurfaceComposerClient;
sp<SurfaceControl> mSurfaceControl;
struct Locked {
int32_t displayWidth;
int32_t displayHeight;
int32_t displayOrientation;
float pointerX;
float pointerY;
uint32_t buttonState;
SkBitmap* iconBitmap;
float iconHotSpotX;
float iconHotSpotY;
bool wantVisible;
bool visible;
bool drawn;
} mLocked;
bool getBoundsLocked(float* outMinX, float* outMinY, float* outMaxX, float* outMaxY) const;
void setPositionLocked(float x, float y);
void updateLocked();
bool createSurfaceIfNeededLocked();
bool drawPointerIfNeededLocked();
bool resizeSurfaceLocked(int32_t width, int32_t height);
};
} // namespace android
#endif // _UI_POINTER_CONTROLLER_H
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