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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.browser;
     18 
     19 import android.content.Context;
     20 import android.util.AttributeSet;
     21 import android.view.Gravity;
     22 import android.widget.ImageView;
     23 import android.widget.LinearLayout;
     24 
     25 import java.util.Map;
     26 
     27 /**
     28  * Displays a series of dots.  The selected one is highlighted.
     29  * No animations yet.  Nothing fancy.
     30  */
     31 class Dots extends LinearLayout {
     32 
     33     private static final int MAX_DOTS = 8;
     34     private int mSelected = -1;
     35 
     36     public Dots(Context context) {
     37         this(context, null);
     38     }
     39 
     40     public Dots(Context context, AttributeSet attrs) {
     41         super(context, attrs);
     42 
     43         setGravity(Gravity.CENTER);
     44         setPadding(0, 4, 0, 4);
     45 
     46         LayoutParams lp =
     47                 new LayoutParams(LayoutParams.WRAP_CONTENT,
     48                                  LayoutParams.WRAP_CONTENT);
     49 
     50         for (int i = 0; i < MAX_DOTS; i++) {
     51             ImageView dotView = new ImageView(mContext);
     52             dotView.setImageResource(R.drawable.page_indicator_unselected2);
     53             addView(dotView, lp);
     54         }
     55     }
     56 
     57     /**
     58      * @param dotCount if less than 1 or greater than MAX_DOTS, Dots
     59      * disappears
     60      */
     61     public void setDotCount(int dotCount) {
     62         if (dotCount > 1 && dotCount <= MAX_DOTS) {
     63             setVisibility(VISIBLE);
     64             for (int i = 0; i < MAX_DOTS; i++) {
     65                 getChildAt(i).setVisibility(i < dotCount? VISIBLE : GONE);
     66             }
     67         } else {
     68             setVisibility(GONE);
     69         }
     70     }
     71 
     72     public void setSelected(int index) {
     73         if (index < 0 || index >= MAX_DOTS) return;
     74 
     75         if (mSelected >= 0) {
     76             // Unselect old
     77             ((ImageView)getChildAt(mSelected)).setImageResource(
     78                     R.drawable.page_indicator_unselected2);
     79         }
     80         ((ImageView)getChildAt(index)).setImageResource(R.drawable.page_indicator);
     81         mSelected = index;
     82     }
     83 }
     84