content: /*
   * Copyright (C) 2016 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.launcher3.pageindicators;
  
  import android.content.Context;
  import android.graphics.drawable.Drawable;
  import android.util.AttributeSet;
  import android.widget.FrameLayout;
  
  import com.android.launcher3.dynamicui.ExtractedColors;
  
  /**
   * Base class for a page indicator.
   */
  public abstract class PageIndicator extends FrameLayout {
      private CaretDrawable mCaretDrawable;
  
      protected int mNumPages = 1;
  
      public PageIndicator(Context context, AttributeSet attrs, int defStyleAttr) {
          super(context, attrs, defStyleAttr);
          setWillNotDraw(false);
      }
  
      public void setScroll(int currentScroll, int totalScroll) {}
  
      public void setActiveMarker(int activePage) {}
  
      public void addMarker() {
          mNumPages++;
          onPageCountChanged();
      }
  
      public void removeMarker() {
          mNumPages--;
          onPageCountChanged();
      }
  
      public void setMarkersCount(int numMarkers) {
          mNumPages = numMarkers;
          onPageCountChanged();
      }
  
      public CaretDrawable getCaretDrawable() {
          return mCaretDrawable;
      }
  
      public void setCaretDrawable(CaretDrawable caretDrawable) {
          if (mCaretDrawable != null) {
              mCaretDrawable.setCallback(null);
          }
  
          mCaretDrawable = caretDrawable;
  
          if (mCaretDrawable != null) {
              mCaretDrawable.setCallback(this);
          }
      }
  
      protected void onPageCountChanged() {}
  
      public void setShouldAutoHide(boolean shouldAutoHide) {}
  
      public void updateColor(ExtractedColors extractedColors) {}
  
      @Override
      protected boolean verifyDrawable(Drawable who) {
          return super.verifyDrawable(who) || who == getCaretDrawable();
      }
  }
  