include/ui/PointerController.h

/*
 * 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 <utils/RefBase.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;
};

} // namespace android

#endif // _UI_POINTER_CONTROLLER_H