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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.
+ */
+package com.android.contacts.common.list;
+
+import android.content.Context;
+import android.content.res.ColorStateList;
+import android.content.res.TypedArray;
+import android.graphics.Outline;
+import android.support.v4.view.PagerAdapter;
+import android.support.v4.view.ViewPager;
+import android.util.AttributeSet;
+import android.util.TypedValue;
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewOutlineProvider;
+import android.widget.FrameLayout;
+import android.widget.HorizontalScrollView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+import com.android.contacts.common.R;
+import com.android.dialer.compat.CompatUtils;
+
+/**
+ * Lightweight implementation of ViewPager tabs. This looks similar to traditional actionBar tabs,
+ * but allows for the view containing the tabs to be placed anywhere on screen. Text-related
+ * attributes can also be assigned in XML - these will get propogated to the child TextViews
+ * automatically.
+ */
+public class ViewPagerTabs extends HorizontalScrollView implements ViewPager.OnPageChangeListener {
+
+ private static final ViewOutlineProvider VIEW_BOUNDS_OUTLINE_PROVIDER;
+ private static final int TAB_SIDE_PADDING_IN_DPS = 10;
+ // TODO: This should use <declare-styleable> in the future
+ private static final int[] ATTRS =
+ new int[] {
+ android.R.attr.textSize,
+ android.R.attr.textStyle,
+ android.R.attr.textColor,
+ android.R.attr.textAllCaps
+ };
+
+ static {
+ if (CompatUtils.isLollipopCompatible()) {
+ VIEW_BOUNDS_OUTLINE_PROVIDER =
+ new ViewOutlineProvider() {
+ @Override
+ public void getOutline(View view, Outline outline) {
+ outline.setRect(0, 0, view.getWidth(), view.getHeight());
+ }
+ };
+ } else {
+ VIEW_BOUNDS_OUTLINE_PROVIDER = null;
+ }
+ }
+
+ /**
+ * Linearlayout that will contain the TextViews serving as tabs. This is the only child of the
+ * parent HorizontalScrollView.
+ */
+ final int mTextStyle;
+
+ final ColorStateList mTextColor;
+ final int mTextSize;
+ final boolean mTextAllCaps;
+ ViewPager mPager;
+ int mPrevSelected = -1;
+ int mSidePadding;
+ private ViewPagerTabStrip mTabStrip;
+ private int[] mTabIcons;
+ // For displaying the unread count next to the tab icon.
+ private int[] mUnreadCounts;
+
+ public ViewPagerTabs(Context context) {
+ this(context, null);
+ }
+
+ public ViewPagerTabs(Context context, AttributeSet attrs) {
+ this(context, attrs, 0);
+ }
+
+ public ViewPagerTabs(Context context, AttributeSet attrs, int defStyle) {
+ super(context, attrs, defStyle);
+ setFillViewport(true);
+
+ mSidePadding = (int) (getResources().getDisplayMetrics().density * TAB_SIDE_PADDING_IN_DPS);
+
+ final TypedArray a = context.obtainStyledAttributes(attrs, ATTRS);
+ mTextSize = a.getDimensionPixelSize(0, 0);
+ mTextStyle = a.getInt(1, 0);
+ mTextColor = a.getColorStateList(2);
+ mTextAllCaps = a.getBoolean(3, false);
+
+ mTabStrip = new ViewPagerTabStrip(context);
+ addView(
+ mTabStrip,
+ new FrameLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT));
+ a.recycle();
+
+ if (CompatUtils.isLollipopCompatible()) {
+ // enable shadow casting from view bounds
+ setOutlineProvider(VIEW_BOUNDS_OUTLINE_PROVIDER);
+ }
+ }
+
+ public void setViewPager(ViewPager viewPager) {
+ mPager = viewPager;
+ addTabs(mPager.getAdapter());
+ }
+
+ /**
+ * Set the tab icons and initialize an array for unread counts the same length as the icon array.
+ *
+ * @param tabIcons An array representing the tab icons in order.
+ */
+ public void configureTabIcons(int[] tabIcons) {
+ mTabIcons = tabIcons;
+ mUnreadCounts = new int[tabIcons.length];
+ }
+
+ public void setUnreadCount(int count, int position) {
+ if (mUnreadCounts == null || position >= mUnreadCounts.length) {
+ return;
+ }
+ mUnreadCounts[position] = count;
+ }
+
+ private void addTabs(PagerAdapter adapter) {
+ mTabStrip.removeAllViews();
+
+ final int count = adapter.getCount();
+ for (int i = 0; i < count; i++) {
+ addTab(adapter.getPageTitle(i), i);
+ }
+ }
+
+ private void addTab(CharSequence tabTitle, final int position) {
+ View tabView;
+ if (mTabIcons != null && position < mTabIcons.length) {
+ View layout = LayoutInflater.from(getContext()).inflate(R.layout.unread_count_tab, null);
+ View iconView = layout.findViewById(R.id.icon);
+ iconView.setBackgroundResource(mTabIcons[position]);
+ iconView.setContentDescription(tabTitle);
+ TextView textView = (TextView) layout.findViewById(R.id.count);
+ if (mUnreadCounts != null && mUnreadCounts[position] > 0) {
+ textView.setText(Integer.toString(mUnreadCounts[position]));
+ textView.setVisibility(View.VISIBLE);
+ iconView.setContentDescription(
+ getResources()
+ .getQuantityString(
+ R.plurals.tab_title_with_unread_items,
+ mUnreadCounts[position],
+ tabTitle.toString(),
+ mUnreadCounts[position]));
+ } else {
+ textView.setVisibility(View.INVISIBLE);
+ iconView.setContentDescription(getResources().getString(R.string.tab_title, tabTitle));
+ }
+ tabView = layout;
+ } else {
+ final TextView textView = new TextView(getContext());
+ textView.setText(tabTitle);
+ textView.setBackgroundResource(R.drawable.view_pager_tab_background);
+
+ // Assign various text appearance related attributes to child views.
+ if (mTextStyle > 0) {
+ textView.setTypeface(textView.getTypeface(), mTextStyle);
+ }
+ if (mTextSize > 0) {
+ textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, mTextSize);
+ }
+ if (mTextColor != null) {
+ textView.setTextColor(mTextColor);
+ }
+ textView.setAllCaps(mTextAllCaps);
+ textView.setGravity(Gravity.CENTER);
+
+ tabView = textView;
+ }
+
+ tabView.setOnClickListener(
+ new OnClickListener() {
+ @Override
+ public void onClick(View v) {
+ mPager.setCurrentItem(getRtlPosition(position));
+ }
+ });
+
+ tabView.setOnLongClickListener(new OnTabLongClickListener(position));
+
+ tabView.setPadding(mSidePadding, 0, mSidePadding, 0);
+
+ mTabStrip.addView(
+ tabView,
+ position,
+ new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT, 1));
+
+ // Default to the first child being selected
+ if (position == 0) {
+ mPrevSelected = 0;
+ tabView.setSelected(true);
+ }
+ }
+
+ /**
+ * Remove a tab at a certain index.
+ *
+ * @param index The index of the tab view we wish to remove.
+ */
+ public void removeTab(int index) {
+ View view = mTabStrip.getChildAt(index);
+ if (view != null) {
+ mTabStrip.removeView(view);
+ }
+ }
+
+ /**
+ * Refresh a tab at a certain index by removing it and reconstructing it.
+ *
+ * @param index The index of the tab view we wish to update.
+ */
+ public void updateTab(int index) {
+ removeTab(index);
+
+ if (index < mPager.getAdapter().getCount()) {
+ addTab(mPager.getAdapter().getPageTitle(index), index);
+ }
+ }
+
+ @Override
+ public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+ position = getRtlPosition(position);
+ int tabStripChildCount = mTabStrip.getChildCount();
+ if ((tabStripChildCount == 0) || (position < 0) || (position >= tabStripChildCount)) {
+ return;
+ }
+
+ mTabStrip.onPageScrolled(position, positionOffset, positionOffsetPixels);
+ }
+
+ @Override
+ public void onPageSelected(int position) {
+ position = getRtlPosition(position);
+ int tabStripChildCount = mTabStrip.getChildCount();
+ if ((tabStripChildCount == 0) || (position < 0) || (position >= tabStripChildCount)) {
+ return;
+ }
+
+ if (mPrevSelected >= 0 && mPrevSelected < tabStripChildCount) {
+ mTabStrip.getChildAt(mPrevSelected).setSelected(false);
+ }
+ final View selectedChild = mTabStrip.getChildAt(position);
+ selectedChild.setSelected(true);
+
+ // Update scroll position
+ final int scrollPos = selectedChild.getLeft() - (getWidth() - selectedChild.getWidth()) / 2;
+ smoothScrollTo(scrollPos, 0);
+ mPrevSelected = position;
+ }
+
+ @Override
+ public void onPageScrollStateChanged(int state) {}
+
+ private int getRtlPosition(int position) {
+ if (getLayoutDirection() == View.LAYOUT_DIRECTION_RTL) {
+ return mTabStrip.getChildCount() - 1 - position;
+ }
+ return position;
+ }
+
+ /** Simulates actionbar tab behavior by showing a toast with the tab title when long clicked. */
+ private class OnTabLongClickListener implements OnLongClickListener {
+
+ final int mPosition;
+
+ public OnTabLongClickListener(int position) {
+ mPosition = position;
+ }
+
+ @Override
+ public boolean onLongClick(View v) {
+ final int[] screenPos = new int[2];
+ getLocationOnScreen(screenPos);
+
+ final Context context = getContext();
+ final int width = getWidth();
+ final int height = getHeight();
+ final int screenWidth = context.getResources().getDisplayMetrics().widthPixels;
+
+ Toast toast =
+ Toast.makeText(context, mPager.getAdapter().getPageTitle(mPosition), Toast.LENGTH_SHORT);
+
+ // Show the toast under the tab
+ toast.setGravity(
+ Gravity.TOP | Gravity.CENTER_HORIZONTAL,
+ (screenPos[0] + width / 2) - screenWidth / 2,
+ screenPos[1] + height);
+
+ toast.show();
+ return true;
+ }
+ }
+}