/*******************************************************************************
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* Copyright 2011, 2012 Chris Banes.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*******************************************************************************/
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package com.doumee.lib_coremodel.view.zoomview;
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import android.annotation.TargetApi;
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import android.content.Context;
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import android.os.Build.VERSION;
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import android.os.Build.VERSION_CODES;
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import android.widget.OverScroller;
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import android.widget.Scroller;
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public abstract class ScrollerProxy {
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public static ScrollerProxy getScroller(Context context) {
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if (VERSION.SDK_INT < VERSION_CODES.GINGERBREAD) {
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return new PreGingerScroller(context);
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} else {
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return new GingerScroller(context);
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}
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}
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public abstract boolean computeScrollOffset();
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public abstract void fling(int startX, int startY, int velocityX, int velocityY, int minX, int maxX, int minY,
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int maxY, int overX, int overY);
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public abstract void forceFinished(boolean finished);
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public abstract int getCurrX();
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public abstract int getCurrY();
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@TargetApi(9)
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private static class GingerScroller extends ScrollerProxy {
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private OverScroller mScroller;
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public GingerScroller(Context context) {
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mScroller = new OverScroller(context);
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}
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@Override
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public boolean computeScrollOffset() {
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return mScroller.computeScrollOffset();
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}
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@Override
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public void fling(int startX, int startY, int velocityX, int velocityY, int minX, int maxX, int minY, int maxY,
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int overX, int overY) {
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mScroller.fling(startX, startY, velocityX, velocityY, minX, maxX, minY, maxY, overX, overY);
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}
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@Override
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public void forceFinished(boolean finished) {
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mScroller.forceFinished(finished);
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}
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@Override
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public int getCurrX() {
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return mScroller.getCurrX();
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}
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@Override
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public int getCurrY() {
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return mScroller.getCurrY();
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}
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}
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private static class PreGingerScroller extends ScrollerProxy {
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private Scroller mScroller;
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public PreGingerScroller(Context context) {
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mScroller = new Scroller(context);
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}
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@Override
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public boolean computeScrollOffset() {
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return mScroller.computeScrollOffset();
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}
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@Override
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public void fling(int startX, int startY, int velocityX, int velocityY, int minX, int maxX, int minY, int maxY,
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int overX, int overY) {
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mScroller.fling(startX, startY, velocityX, velocityY, minX, maxX, minY, maxY);
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}
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@Override
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public void forceFinished(boolean finished) {
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mScroller.forceFinished(finished);
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}
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@Override
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public int getCurrX() {
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return mScroller.getCurrX();
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}
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@Override
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public int getCurrY() {
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return mScroller.getCurrY();
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}
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}
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}
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