Overhaul Calculator UI.

Bug: 14418545
Bug: 14419084
Bug: 14419142
Bug: 14420277
Bug: 14466652
Bug: 14564559
Bug: 14564608
Bug: 14846724
Bug: 15090154
Bug: 15287699
Bug: 15289526
Bug: 15289616
Change-Id: I93e1530446d5bd6a4c3189f751c88ece1abc7767

1 files changed, 93 insertions, 0 deletions

diff --git a/src/com/android/calculator2/CalculatorPadViewPager.java b/src/com/android/calculator2/CalculatorPadViewPager.java
new file mode 100644
index 0000000..af16d47
--- /dev/null
+++ b/src/com/android/calculator2/CalculatorPadViewPager.java
@@ -0,0 +1,93 @@
+/*
+ * 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.
+ */
+
+package com.android.calculator2;
+
+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;
+
+public class CalculatorPadViewPager extends ViewPager {
+
+    private final PagerAdapter mStaticPagerAdapter = new PagerAdapter() {
+        @Override
+        public int getCount() {
+            return getChildCount();
+        }
+
+        @Override
+        public Object instantiateItem(ViewGroup container, int position) {
+            return getChildAt(position);
+        }
+
+        @Override
+        public void destroyItem(ViewGroup container, int position, Object object) {
+            removeViewAt(position);
+        }
+
+        @Override
+        public boolean isViewFromObject(View view, Object object) {
+            return view == object;
+        }
+
+        @Override
+        public float getPageWidth(int position) {
+            return position == 1 ? 0.8f : 1.0f;
+        }
+    };
+    private final PageTransformer mPageTransformer = new PageTransformer() {
+        @Override
+        public void transformPage(View view, float position) {
+            if (position < -1.0f) {
+                view.setAlpha(0.0f);
+            } else if (position <= 0.0f) {
+                // Pin the left page to the left side.
+                view.setTranslationX(getWidth() * -position);
+            } else if (position <= 1.0f) {
+                // Use the default slide transition when moving to the next page.
+                view.setAlpha(1.0f);
+                view.setTranslationX(0.0f);
+            } else {
+                view.setAlpha(0.0f);
+            }
+        }
+    };
+
+    public CalculatorPadViewPager(Context context) {
+        this(context, null);
+    }
+
+    public CalculatorPadViewPager(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        setAdapter(mStaticPagerAdapter);
+        setPageMargin(getResources().getDimensionPixelSize(R.dimen.pad_page_margin));
+        setPageTransformer(false, mPageTransformer);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+
+        // Invalidate the adapter's data set since children may have been added during inflation.
+        if (getAdapter() == mStaticPagerAdapter) {
+            mStaticPagerAdapter.notifyDataSetChanged();
+        }
+    }
+}