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/*
* 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.view.ViewConfiguration;
/**
* Helper for accessing features in {@link ViewConfiguration}
* introduced after API level 4 in a backwards compatible fashion.
*/
public class ViewConfigurationCompat {
/**
* Interface for the full API.
*/
interface ViewConfigurationVersionImpl {
public int getScaledPagingTouchSlop(ViewConfiguration config);
}
/**
* Interface implementation that doesn't use anything about v4 APIs.
*/
static class BaseViewConfigurationVersionImpl implements ViewConfigurationVersionImpl {
@Override
public int getScaledPagingTouchSlop(ViewConfiguration config) {
return config.getScaledTouchSlop();
}
}
/**
* Interface implementation for devices with at least v11 APIs.
*/
static class FroyoViewConfigurationVersionImpl implements ViewConfigurationVersionImpl {
@Override
public int getScaledPagingTouchSlop(ViewConfiguration config) {
return ViewConfigurationCompatFroyo.getScaledPagingTouchSlop(config);
}
}
/**
* Select the correct implementation to use for the current platform.
*/
static final ViewConfigurationVersionImpl IMPL;
static {
if (android.os.Build.VERSION.SDK_INT >= 11) {
IMPL = new FroyoViewConfigurationVersionImpl();
} else {
IMPL = new BaseViewConfigurationVersionImpl();
}
}
// -------------------------------------------------------------------
/**
* Call {@link ViewConfiguration#getScaledPagingTouchSlop()}.
* If running on a pre-{@link android.os.Build.VERSION_CODES#FROYO} device,
* returns {@link ViewConfiguration#getScaledTouchSlop()}.
*/
public static int getScaledPagingTouchSlop(ViewConfiguration config) {
return IMPL.getScaledPagingTouchSlop(config);
}
}
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