content: /*
   * Copyright (C) 2013 Andreas Stuetz <andreas.stuetz@gmail.com>
   *
   * 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.zhongou.widget;
  
  import android.annotation.SuppressLint;
  import android.content.Context;
  import android.content.res.TypedArray;
  import android.graphics.Canvas;
  import android.graphics.Color;
  import android.graphics.Paint;
  import android.graphics.Paint.Style;
  import android.graphics.Typeface;
  import android.graphics.drawable.AnimationDrawable;
  import android.graphics.drawable.Drawable;
  import android.os.Build;
  import android.os.Parcel;
  import android.os.Parcelable;
  import android.support.v4.view.ViewPager;
  import android.support.v4.view.ViewPager.OnPageChangeListener;
  import android.util.AttributeSet;
  import android.util.DisplayMetrics;
  import android.util.TypedValue;
  import android.view.Gravity;
  import android.view.View;
  import android.view.ViewTreeObserver.OnGlobalLayoutListener;
  import android.widget.HorizontalScrollView;
  import android.widget.ImageButton;
  import android.widget.LinearLayout;
  import android.widget.TextView;
  
  import com.zhongou.R;
  import com.zhongou.listener.DoubleClickListener;
  
  import java.util.Calendar;
  import java.util.Locale;
  
  /**
   * 地图考勤记录使用
   *
   */
  public class PagerSlidingTabStrip extends HorizontalScrollView {
  
      public interface IconTabProvider {
          public int getPageIconResId(int position);
  
          public int getUnselectPageIconResId(int position);
      }
  
      // @formatter:off
      private static final int[] ATTRS = new int[]{
              android.R.attr.textSize,
              android.R.attr.textColor
      };
      // @formatter:on
  
      private LinearLayout.LayoutParams defaultTabLayoutParams;
      private LinearLayout.LayoutParams expandedTabLayoutParams;
  
      private final PageListener pageListener = new PageListener();
      public OnPageChangeListener delegatePageListener;
      public DoubleClickListener doubleClickListener;
  
      private LinearLayout tabsContainer;
      private ViewPager pager;
  
      private int tabCount;
  
      private int currentPosition = 0;
      private float currentPositionOffset = 0f;
  
      private Paint rectPaint;
      private Paint dividerPaint;
  
      private int indicatorColor = getContext().getResources().getColor(R.color.blue);//主题色
      private int underlineColor = 0x3A000000;
      private int dividerColor = 0x1A000000;
  
      private boolean shouldExpand = false;
      private boolean textAllCaps = true;
  
      private int scrollOffset = 52;
      private int indicatorHeight = 8;
      private int underlineHeight = 1;
      private int dividerPadding = 8;
      private int tabPadding = 24;
      private int dividerWidth = 1;
  
      private int tabTextSize = 14;
      private int tabTextColor = Color.WHITE;
      private int tabTextSelectColor = Color.BLACK;
      private Typeface tabTypeface = null;
      private int tabTypefaceStyle = Typeface.BOLD;
  
      private int lastScrollX = 0;
  
      private int tabBackgroundResId = R.drawable.background_tab;
  
      private Locale locale;
      private boolean isOpposite;//是否显示相反方向
  
  
      public boolean isTabClickable() {
          return tabClickable;
      }
  
      public void setTabClickable(boolean tabClickable) {
          this.tabClickable = tabClickable;
      }
  
      private boolean tabClickable = true;
  
      public PagerSlidingTabStrip(Context context) {
          this(context, null);
      }
  
      public PagerSlidingTabStrip(Context context, AttributeSet attrs) {
          this(context, attrs, 0);
      }
  
      public PagerSlidingTabStrip(Context context, AttributeSet attrs, int defStyle) {
          super(context, attrs, defStyle);
  
          setFillViewport(true);
          setWillNotDraw(false);
  
          tabsContainer = new LinearLayout(context);
          tabsContainer.setOrientation(LinearLayout.HORIZONTAL);
          tabsContainer.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
          addView(tabsContainer);
          tabsContainer.setBackgroundColor(Color.TRANSPARENT);
  
          DisplayMetrics dm = getResources().getDisplayMetrics();
  
          scrollOffset = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, scrollOffset, dm);
          indicatorHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, indicatorHeight, dm);
          underlineHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, underlineHeight, dm);
          dividerPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dividerPadding, dm);
          tabPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, tabPadding, dm);
          dividerWidth = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dividerWidth, dm);
          tabTextSize = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, tabTextSize, dm);
  
          // get system attrs (android:textSize and android:textColor)
  
          TypedArray a = context.obtainStyledAttributes(attrs, ATTRS);
  
          tabTextSize = a.getDimensionPixelSize(0, tabTextSize);
          tabTextColor = a.getColor(1, tabTextColor);
  
          a.recycle();
  
          // get custom attrs
  
          a = context.obtainStyledAttributes(attrs, R.styleable.PagerSlidingTabStrip);
  
          indicatorColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsIndicatorColor, indicatorColor);
          underlineColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsUnderlineColor, underlineColor);
          dividerColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsDividerColor, dividerColor);
          indicatorHeight = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsIndicatorHeight, indicatorHeight);
          underlineHeight = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsUnderlineHeight, underlineHeight);
          dividerPadding = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsDividerPadding, dividerPadding);
          tabPadding = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsTabPaddingLeftRight, tabPadding);
          tabBackgroundResId = a.getResourceId(R.styleable.PagerSlidingTabStrip_pstsTabBackground, tabBackgroundResId);
          shouldExpand = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsShouldExpand, shouldExpand);
          scrollOffset = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsScrollOffset, scrollOffset);
          textAllCaps = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsTextAllCaps, textAllCaps);
  
          a.recycle();
  
          rectPaint = new Paint();
          rectPaint.setAntiAlias(true);
          rectPaint.setStyle(Style.FILL);
  
          dividerPaint = new Paint();
          dividerPaint.setAntiAlias(true);
          dividerPaint.setStrokeWidth(dividerWidth);
  
          defaultTabLayoutParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
          expandedTabLayoutParams = new LinearLayout.LayoutParams(0, LayoutParams.MATCH_PARENT, 1.0f);
  
          if (locale == null) {
              locale = getResources().getConfiguration().locale;
          }
      }
  
      public void setViewPager(ViewPager pager) {
          this.pager = pager;
  
          if (pager.getAdapter() == null) {
              throw new IllegalStateException("ViewPager does not have adapter instance.");
          }
  
          pager.setOnPageChangeListener(pageListener);
  
          notifyDataSetChanged();
      }
  
      public void setOnPageChangeListener(OnPageChangeListener listener) {
          this.delegatePageListener = listener;
      }
  
      public void notifyDataSetChanged() {
  
          tabsContainer.removeAllViews();
  
          tabCount = pager.getAdapter().getCount();
  
          int position = pager.getCurrentItem();
          for (int i = 0; i < tabCount; i++) {
  
              if (pager.getAdapter() instanceof IconTabProvider) {
                  if (i == position) {
                      addIconTab(i, ((IconTabProvider) pager.getAdapter()).getPageIconResId(i));
                  } else {
                      addIconTab(i, ((IconTabProvider) pager.getAdapter()).getUnselectPageIconResId(i));
                  }
              } else {
                  addTextTab(i, pager.getAdapter().getPageTitle(i).toString());
              }
  
          }
  
          updateTabStyles();
  
          getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
  
              @SuppressWarnings("deprecation")
              @SuppressLint("NewApi")
              @Override
              public void onGlobalLayout() {
  
                  if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
                      getViewTreeObserver().removeGlobalOnLayoutListener(this);
                  } else {
                      getViewTreeObserver().removeOnGlobalLayoutListener(this);
                  }
  
                  currentPosition = pager.getCurrentItem();
                  scrollToChild(currentPosition, 0);
              }
          });
  
      }
  
      private void setChooseTab(int position) {
          int childCount = tabsContainer.getChildCount();
          if (pager.getAdapter() instanceof IconTabProvider) {
              ImageButton tab;
              for (int i = 0; i < childCount; ++i) {
                  tab = (ImageButton) tabsContainer.getChildAt(i);
                  if (i == position) {
                      tab.setImageResource(((IconTabProvider) pager.getAdapter()).getPageIconResId(i));
                      Drawable drawable = tab.getDrawable();
                      if (drawable instanceof AnimationDrawable) {
                          AnimationDrawable animationDrawable = (AnimationDrawable) drawable;
                          animationDrawable.start();
                      }
                  } else {
                      tab.setImageResource(((IconTabProvider) pager.getAdapter()).getUnselectPageIconResId(i));
                  }
              }
  
          } else {
              for (int i = 0; i < childCount; ++i) {
                  TextView tab;
                  tab = (TextView) tabsContainer.getChildAt(i);
                  if (i == position) {
                      tab.setTextColor(tabTextSelectColor);
                  } else {
                      tab.setTextColor(tabTextColor);
                  }
              }
          }
      }
  
  
      private void addTextTab(final int position, String title) {
  
          TextView tab = new TextView(getContext());
          tab.setTextSize(14);
          tab.setText(title);
          tab.setGravity(Gravity.CENTER);
          tab.setSingleLine();
  
          addTab(position, tab);
      }
  
      private void addIconTab(final int position, int resId) {
  
          ImageButton tab = new ImageButton(getContext());
          tab.setImageResource(resId);
  
          addTab(position, tab);
  
      }
  
      private void addTab(final int position, View tab) {
          tab.setFocusable(true);
          if (tabClickable) {
              tab.setOnClickListener(new OnClickListener() {
  
                  public static final int MIN_CLICK_DELAY_TIME = 1000;
                  private long lastClickTime = 0;
  
                  @Override
                  public void onClick(View v) {
                      pager.setCurrentItem(position);
                      long currentTime = Calendar.getInstance().getTimeInMillis();
                      if (currentTime - lastClickTime > MIN_CLICK_DELAY_TIME) {
                          lastClickTime = currentTime;
                      } else {
                          if (doubleClickListener != null) {
                              doubleClickListener.onClick(position);
                          }
                      }
  
                  }
              });
          }
  
  
          tab.setPadding(tabPadding, 0, tabPadding, 0);
          tabsContainer.addView(tab, position, shouldExpand ? expandedTabLayoutParams : defaultTabLayoutParams);
      }
  
      private void updateTabStyles() {
  
          for (int i = 0; i < tabCount; i++) {
  
              View v = tabsContainer.getChildAt(i);
  
              v.setBackgroundResource(tabBackgroundResId);
  
              if (v instanceof TextView) {
  
                  TextView tab = (TextView) v;
                  tab.setTextSize(TypedValue.COMPLEX_UNIT_PX, tabTextSize);
                  tab.setTypeface(tabTypeface, tabTypefaceStyle);
                  if (i == currentPosition) {
                      tab.setTextColor(tabTextSelectColor);
                  } else {
                      tab.setTextColor(tabTextColor);
                  }
                  // setAllCaps() is only available from API 14, so the upper case is made manually if we are on a
                  // pre-ICS-build
                  if (textAllCaps) {
                      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
                          tab.setAllCaps(true);
                      } else {
                          tab.setText(tab.getText().toString().toUpperCase(locale));
                      }
                  }
              }
          }
  
      }
  
      private void scrollToChild(int position, int offset) {
  
          if (tabCount == 0) {
              return;
          }
  
          int newScrollX = tabsContainer.getChildAt(position).getLeft() + offset;
  
          if (position > 0 || offset > 0) {
              newScrollX -= scrollOffset;
          }
  
          if (newScrollX != lastScrollX) {
              lastScrollX = newScrollX;
              scrollTo(newScrollX, 0);
          }
  
      }
  
      @Override
      protected void onDraw(Canvas canvas) {
          super.onDraw(canvas);
  
          if (isInEditMode() || tabCount == 0) {
              return;
          }
  
          final int height = getHeight();
  
          // draw indicator line
  
          rectPaint.setColor(indicatorColor);
  
          // default: line below current tab
          View currentTab = tabsContainer.getChildAt(currentPosition);
          float lineLeft = currentTab.getLeft();
          float lineRight = currentTab.getRight();
  
          // if there is an offset, start interpolating left and right coordinates between current and next tab
          if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {
  
              View nextTab = tabsContainer.getChildAt(currentPosition + 1);
              final float nextTabLeft = nextTab.getLeft();
              final float nextTabRight = nextTab.getRight();
  
              lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
              lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);
          }
  
          canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height, rectPaint);
  
          // draw underline
  
          rectPaint.setColor(underlineColor);
          canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);
  
          // draw divider
  
          dividerPaint.setColor(dividerColor);
          for (int i = 0; i < tabCount - 1; i++) {
              View tab = tabsContainer.getChildAt(i);
              canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
          }
      }
  
      private class PageListener implements OnPageChangeListener {
  
          @Override
          public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
  
              currentPosition = position;
              currentPositionOffset = positionOffset;
  
              scrollToChild(position, (int) (positionOffset * tabsContainer.getChildAt(position).getWidth()));
  
              invalidate();
              if (!isOpposite) {
                  setChooseTab(currentPosition);
              } else {
                  setChooseTab((tabCount - 1) - currentPosition);
              }
  
              if (delegatePageListener != null) {
                  delegatePageListener.onPageScrolled(position, positionOffset, positionOffsetPixels);
              }
          }
  
          @Override
          public void onPageScrollStateChanged(int state) {
              if (state == ViewPager.SCROLL_STATE_IDLE) {
                  scrollToChild(pager.getCurrentItem(), 0);
              }
  
              if (delegatePageListener != null) {
                  delegatePageListener.onPageScrollStateChanged(state);
              }
          }
  
          @Override
          public void onPageSelected(int position) {
              if (delegatePageListener != null) {
                  delegatePageListener.onPageSelected(position);
              }
          }
  
      }
  
      public void setIndicatorColor(int indicatorColor) {
          this.indicatorColor = indicatorColor;
          invalidate();
      }
  
      public void setIndicatorColorResource(int resId) {
          this.indicatorColor = getResources().getColor(resId);
          invalidate();
      }
  
      public int getIndicatorColor() {
          return this.indicatorColor;
      }
  
      public void setIndicatorHeight(int indicatorLineHeightPx) {
          this.indicatorHeight = indicatorLineHeightPx;
          invalidate();
      }
  
      public int getIndicatorHeight() {
          return indicatorHeight;
      }
  
      public void setUnderlineColor(int underlineColor) {
          this.underlineColor = underlineColor;
          invalidate();
      }
  
      public void setUnderlineColorResource(int resId) {
          this.underlineColor = getResources().getColor(resId);
          invalidate();
      }
  
      public int getUnderlineColor() {
          return underlineColor;
      }
  
      public void setDividerColor(int dividerColor) {
          this.dividerColor = dividerColor;
          invalidate();
      }
  
      public void setDividerColorResource(int resId) {
          this.dividerColor = getResources().getColor(resId);
          invalidate();
      }
  
      public int getDividerColor() {
          return dividerColor;
      }
  
      public void setUnderlineHeight(int underlineHeightPx) {
          this.underlineHeight = underlineHeightPx;
          invalidate();
      }
  
      public int getUnderlineHeight() {
          return underlineHeight;
      }
  
      public void setDividerPadding(int dividerPaddingPx) {
          this.dividerPadding = dividerPaddingPx;
          invalidate();
      }
  
      public int getDividerPadding() {
          return dividerPadding;
      }
  
      public void setScrollOffset(int scrollOffsetPx) {
          this.scrollOffset = scrollOffsetPx;
          invalidate();
      }
  
      public int getScrollOffset() {
          return scrollOffset;
      }
  
      public void setShouldExpand(boolean shouldExpand) {
          this.shouldExpand = shouldExpand;
          requestLayout();
      }
  
      public boolean getShouldExpand() {
          return shouldExpand;
      }
  
      public boolean isTextAllCaps() {
          return textAllCaps;
      }
  
      public void setAllCaps(boolean textAllCaps) {
          this.textAllCaps = textAllCaps;
      }
  
      public void setTextSize(int textSizePx) {
          this.tabTextSize = textSizePx;
          updateTabStyles();
      }
  
      public int getTextSize() {
          return tabTextSize;
      }
  
      public void setTextColor(int textColor) {
          this.tabTextColor = textColor;
          updateTabStyles();
      }
  
      public void setTextColorResource(int resId) {
          this.tabTextColor = getResources().getColor(resId);
          updateTabStyles();
      }
  
      public int getTextColor() {
          return tabTextColor;
      }
  
      public void setTypeface(Typeface typeface, int style) {
          this.tabTypeface = typeface;
          this.tabTypefaceStyle = style;
          updateTabStyles();
      }
  
      public void setTabBackground(int resId) {
          this.tabBackgroundResId = resId;
      }
  
      public int getTabBackground() {
          return tabBackgroundResId;
      }
  
      public void setTabPaddingLeftRight(int paddingPx) {
          this.tabPadding = paddingPx;
          updateTabStyles();
      }
  
      public boolean isOpposite() {
          return isOpposite;
      }
  
      public void setOpposite(boolean opposite) {
          isOpposite = opposite;
      }
  
      public int getTabPaddingLeftRight() {
          return tabPadding;
      }
  
  
      public int getTabTextSelectColor() {
          return tabTextSelectColor;
      }
  
      public void setTabTextSelectColor(int tabTextSelectColor) {
          this.tabTextSelectColor = tabTextSelectColor;
      }
  
      @Override
      public void onRestoreInstanceState(Parcelable state) {
          SavedState savedState = (SavedState) state;
          super.onRestoreInstanceState(savedState.getSuperState());
          currentPosition = savedState.currentPosition;
          requestLayout();
      }
  
      @Override
      public Parcelable onSaveInstanceState() {
          Parcelable superState = super.onSaveInstanceState();
          SavedState savedState = new SavedState(superState);
          savedState.currentPosition = currentPosition;
          return savedState;
      }
  
      static class SavedState extends BaseSavedState {
          int currentPosition;
  
          public SavedState(Parcelable superState) {
              super(superState);
          }
  
          private SavedState(Parcel in) {
              super(in);
              currentPosition = in.readInt();
          }
  
          @Override
          public void writeToParcel(Parcel dest, int flags) {
              super.writeToParcel(dest, flags);
              dest.writeInt(currentPosition);
          }
  
          public static final Creator<SavedState> CREATOR = new Creator<SavedState>() {
              @Override
              public SavedState createFromParcel(Parcel in) {
                  return new SavedState(in);
              }
  
              @Override
              public SavedState[] newArray(int size) {
                  return new SavedState[size];
              }
          };
      }
  
      public LinearLayout getTabsContainer() {
          return tabsContainer;
      }
  
  
      public void setDoubleClickListener(DoubleClickListener doubleClickListener) {
          this.doubleClickListener = doubleClickListener;
      }
  }
  