sdk/sources/android-23/android/support/v4/view/ViewParentCompatLollipop.java

/*
 * Copyright (C) 2015 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.util.Log;
import android.view.View;
import android.view.ViewParent;

class ViewParentCompatLollipop {
    private static final String TAG = "ViewParentCompat";

    public static boolean onStartNestedScroll(ViewParent parent, View child, View target,
            int nestedScrollAxes) {
        try {
            return parent.onStartNestedScroll(child, target, nestedScrollAxes);
        } catch (AbstractMethodError e) {
            Log.e(TAG, "ViewParent " + parent + " does not implement interface " +
                    "method onStartNestedScroll", e);
            return false;
        }
    }

    public static void onNestedScrollAccepted(ViewParent parent, View child, View target,
            int nestedScrollAxes) {
        try {
            parent.onNestedScrollAccepted(child, target, nestedScrollAxes);
        } catch (AbstractMethodError e) {
            Log.e(TAG, "ViewParent " + parent + " does not implement interface " +
                    "method onNestedScrollAccepted", e);
        }
    }

    public static void onStopNestedScroll(ViewParent parent, View target) {
        try {
            parent.onStopNestedScroll(target);
        } catch (AbstractMethodError e) {
            Log.e(TAG, "ViewParent " + parent + " does not implement interface " +
                    "method onStopNestedScroll", e);
        }
    }

    public static void onNestedScroll(ViewParent parent, View target, int dxConsumed,
            int dyConsumed, int dxUnconsumed, int dyUnconsumed) {
        try {
            parent.onNestedScroll(target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed);
        } catch (AbstractMethodError e) {
            Log.e(TAG, "ViewParent " + parent + " does not implement interface " +
                    "method onNestedScroll", e);
        }
    }

    public static void onNestedPreScroll(ViewParent parent, View target, int dx, int dy,
            int[] consumed) {
        try {
            parent.onNestedPreScroll(target, dx, dy, consumed);
        } catch (AbstractMethodError e) {
            Log.e(TAG, "ViewParent " + parent + " does not implement interface " +
                    "method onNestedPreScroll", e);
        }
    }

    public static boolean onNestedFling(ViewParent parent, View target, float velocityX,
            float velocityY, boolean consumed) {
        try {
            return parent.onNestedFling(target, velocityX, velocityY, consumed);
        } catch (AbstractMethodError e) {
            Log.e(TAG, "ViewParent " + parent + " does not implement interface " +
                    "method onNestedFling", e);
            return false;
        }
    }

    public static boolean onNestedPreFling(ViewParent parent, View target, float velocityX,
            float velocityY) {
        try {
            return parent.onNestedPreFling(target, velocityX, velocityY);
        } catch (AbstractMethodError e) {
            Log.e(TAG, "ViewParent " + parent + " does not implement interface " +
                    "method onNestedPreFling", e);
            return false;
        }
    }
}