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app/src/main/java/com/example/arch1/testapplication/CalculatorPadViewPager.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,116 @@ | ||
| package com.example.arch1.testapplication; | ||
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| /* | ||
| * Copyright (C) 2014 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. | ||
| */ | ||
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| import android.content.Context; | ||
| import android.support.v4.view.PagerAdapter; | ||
| import android.support.v4.view.ViewPager; | ||
| import android.util.AttributeSet; | ||
| import android.view.View; | ||
| import android.view.ViewGroup; | ||
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| public class CalculatorPadViewPager extends ViewPager { | ||
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| private final PagerAdapter mStaticPagerAdapter = new PagerAdapter() { | ||
| @Override | ||
| public int getCount() { | ||
| return getChildCount(); | ||
| } | ||
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| @Override | ||
| public Object instantiateItem(ViewGroup container, int position) { | ||
| return getChildAt(position); | ||
| } | ||
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| @Override | ||
| public void destroyItem(ViewGroup container, int position, Object object) { | ||
| removeViewAt(position); | ||
| } | ||
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| @Override | ||
| public boolean isViewFromObject(View view, Object object) { | ||
| return view == object; | ||
| } | ||
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| @Override | ||
| public float getPageWidth(int position) { | ||
| return position == 1 ? 7.0f / 9.0f : 1.0f; | ||
| } | ||
| }; | ||
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| private final OnPageChangeListener mOnPageChangeListener = new SimpleOnPageChangeListener() { | ||
| private void recursivelySetEnabled(View view, boolean enabled) { | ||
| if (view instanceof ViewGroup) { | ||
| final ViewGroup viewGroup = (ViewGroup) view; | ||
| for (int childIndex = 0; childIndex < viewGroup.getChildCount(); ++childIndex) { | ||
| recursivelySetEnabled(viewGroup.getChildAt(childIndex), enabled); | ||
| } | ||
| } else { | ||
| view.setEnabled(enabled); | ||
| } | ||
| } | ||
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| @Override | ||
| public void onPageSelected(int position) { | ||
| if (getAdapter() == mStaticPagerAdapter) { | ||
| for (int childIndex = 0; childIndex < getChildCount(); ++childIndex) { | ||
| // Only enable subviews of the current page. | ||
| recursivelySetEnabled(getChildAt(childIndex), childIndex == position); | ||
| } | ||
| } | ||
| } | ||
| }; | ||
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| private final PageTransformer mPageTransformer = new PageTransformer() { | ||
| @Override | ||
| public void transformPage(View view, float position) { | ||
| if (position < 0.0f) { | ||
| // Pin the left page to the left side. | ||
| view.setTranslationX(getWidth() * -position); | ||
| view.setAlpha(Math.max(1.0f + position, 0.0f)); | ||
| } else { | ||
| // Use the default slide transition when moving to the next page. | ||
| view.setTranslationX(0.0f); | ||
| view.setAlpha(1.0f); | ||
| } | ||
| } | ||
| }; | ||
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| public CalculatorPadViewPager(Context context) { | ||
| this(context, null); | ||
| } | ||
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| public CalculatorPadViewPager(Context context, AttributeSet attrs) { | ||
| super(context, attrs); | ||
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| setAdapter(mStaticPagerAdapter); | ||
| //setBackgroundColor(getResources().getColor(android.R.color.black)); | ||
| setOnPageChangeListener(mOnPageChangeListener); | ||
| setPageMargin(getResources().getDimensionPixelSize(R.dimen.pad_page_margin)); | ||
| setPageTransformer(false, mPageTransformer); | ||
| } | ||
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| @Override | ||
| protected void onFinishInflate() { | ||
| super.onFinishInflate(); | ||
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| // Invalidate the adapter's data set since children may have been added during inflation. | ||
| if (getAdapter() == mStaticPagerAdapter) { | ||
| mStaticPagerAdapter.notifyDataSetChanged(); | ||
| } | ||
| } | ||
| } |
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