android.support.v4.view.KeyEventCompat2.java Source code

Introduction

Here is the source code for android.support.v4.view.KeyEventCompat2.java

Source

/*
 * Copyright (C) 2011 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.support.v4.view;

import android.support.v4.view.KeyEventCompat.BaseKeyEventVersionImpl;
import android.support.v4.view.KeyEventCompat.EclairKeyEventVersionImpl;
import android.support.v4.view.KeyEventCompat.HoneycombKeyEventVersionImpl;
import android.support.v4.view.KeyEventCompat.KeyEventVersionImpl;
import android.view.KeyEvent;
import android.view.View;

/**
 * Helper for accessing features in {@link KeyEvent} introduced after API level
 * 4 in a backwards compatible fashion.
 *
 * Modified from KeyEventCompat of android-support-v4. The official
 * KeyEventCompat doesn't use EclairKeyEventVersionImpl even the SDK is matched.
 */
public class KeyEventCompat2 {

    /**
     * Select the correct implementation to use for the current platform.
     */
    static final KeyEventVersionImpl IMPL;

    static {
        if (android.os.Build.VERSION.SDK_INT >= 11) {
            IMPL = new HoneycombKeyEventVersionImpl();
        } else if (android.os.Build.VERSION.SDK_INT >= 5) {
            // Use EclairKeyEventVersionImpl.
            IMPL = new EclairKeyEventVersionImpl();
        } else {
            IMPL = new BaseKeyEventVersionImpl();
        }
    }

    // -------------------------------------------------------------------

    public static int normalizeMetaState(int metaState) {
        return IMPL.normalizeMetaState(metaState);
    }

    public static boolean metaStateHasModifiers(int metaState, int modifiers) {
        return IMPL.metaStateHasModifiers(metaState, modifiers);
    }

    public static boolean metaStateHasNoModifiers(int metaState) {
        return IMPL.metaStateHasNoModifiers(metaState);
    }

    public static boolean hasModifiers(KeyEvent event, int modifiers) {
        return IMPL.metaStateHasModifiers(event.getMetaState(), modifiers);
    }

    public static boolean hasNoModifiers(KeyEvent event) {
        return IMPL.metaStateHasNoModifiers(event.getMetaState());
    }

    public static void startTracking(KeyEvent event) {
        IMPL.startTracking(event);
    }

    public static boolean isTracking(KeyEvent event) {
        return IMPL.isTracking(event);
    }

    public static Object getKeyDispatcherState(View view) {
        return IMPL.getKeyDispatcherState(view);
    }

    public static boolean dispatch(KeyEvent event, KeyEvent.Callback receiver, Object state, Object target) {
        return IMPL.dispatch(event, receiver, state, target);
    }
}