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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.
*/
package android.view;
import android.os.Parcel;
import android.os.Parcelable;
/**
* Common base class for input events.
*/
public abstract class InputEvent implements Parcelable {
/** @hide */
protected int mDeviceId;
/** @hide */
protected int mSource;
/** @hide */
protected static final int PARCEL_TOKEN_MOTION_EVENT = 1;
/** @hide */
protected static final int PARCEL_TOKEN_KEY_EVENT = 2;
/*package*/ InputEvent() {
}
/**
* Gets the id for the device that this event came from. An id of
* zero indicates that the event didn't come from a physical device
* and maps to the default keymap. The other numbers are arbitrary and
* you shouldn't depend on the values.
*
* @return The device id.
* @see InputDevice#getDevice
*/
public final int getDeviceId() {
return mDeviceId;
}
/**
* Gets the device that this event came from.
*
* @return The device, or null if unknown.
*/
public final InputDevice getDevice() {
return InputDevice.getDevice(mDeviceId);
}
/**
* Gets the source of the event.
*
* @return The event source or {@link InputDevice#SOURCE_UNKNOWN} if unknown.
* @see InputDevice#getSourceInfo
*/
public final int getSource() {
return mSource;
}
/**
* Modifies the source of the event.
* @param source The source.
*
* @hide
*/
public final void setSource(int source) {
mSource = source;
}
public int describeContents() {
return 0;
}
/** @hide */
protected final void readBaseFromParcel(Parcel in) {
mDeviceId = in.readInt();
mSource = in.readInt();
}
/** @hide */
protected final void writeBaseToParcel(Parcel out) {
out.writeInt(mDeviceId);
out.writeInt(mSource);
}
public static final Parcelable.Creator<InputEvent> CREATOR
= new Parcelable.Creator<InputEvent>() {
public InputEvent createFromParcel(Parcel in) {
int token = in.readInt();
if (token == PARCEL_TOKEN_KEY_EVENT) {
return KeyEvent.createFromParcelBody(in);
} else if (token == PARCEL_TOKEN_MOTION_EVENT) {
return MotionEvent.createFromParcelBody(in);
} else {
throw new IllegalStateException("Unexpected input event type token in parcel.");
}
}
public InputEvent[] newArray(int size) {
return new InputEvent[size];
}
};
}
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