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      1 /*
      2  * Copyright (C) 2011 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.launcher3;
     18 
     19 import android.content.Context;
     20 import android.content.res.Resources;
     21 import android.util.AttributeSet;
     22 import android.widget.FrameLayout;
     23 import android.widget.ImageView;
     24 
     25 public class PageIndicatorMarker extends FrameLayout {
     26     @SuppressWarnings("unused")
     27     private static final String TAG = "PageIndicator";
     28 
     29     private static final int MARKER_FADE_DURATION = 175;
     30 
     31     private ImageView mActiveMarker;
     32     private ImageView mInactiveMarker;
     33     private boolean mIsActive = false;
     34 
     35     public PageIndicatorMarker(Context context) {
     36         this(context, null);
     37     }
     38 
     39     public PageIndicatorMarker(Context context, AttributeSet attrs) {
     40         this(context, attrs, 0);
     41     }
     42 
     43     public PageIndicatorMarker(Context context, AttributeSet attrs, int defStyle) {
     44         super(context, attrs, defStyle);
     45     }
     46 
     47     protected void onFinishInflate() {
     48         mActiveMarker = (ImageView) findViewById(R.id.active);
     49         mInactiveMarker = (ImageView) findViewById(R.id.inactive);
     50     }
     51 
     52     void setMarkerDrawables(int activeResId, int inactiveResId) {
     53         Resources r = getResources();
     54         mActiveMarker.setImageDrawable(r.getDrawable(activeResId));
     55         mInactiveMarker.setImageDrawable(r.getDrawable(inactiveResId));
     56     }
     57 
     58     void activate(boolean immediate) {
     59         if (immediate) {
     60             mActiveMarker.animate().cancel();
     61             mActiveMarker.setAlpha(1f);
     62             mActiveMarker.setScaleX(1f);
     63             mActiveMarker.setScaleY(1f);
     64             mInactiveMarker.animate().cancel();
     65             mInactiveMarker.setAlpha(0f);
     66         } else {
     67             mActiveMarker.animate()
     68                     .alpha(1f)
     69                     .scaleX(1f)
     70                     .scaleY(1f)
     71                     .setDuration(MARKER_FADE_DURATION).start();
     72             mInactiveMarker.animate()
     73                     .alpha(0f)
     74                     .setDuration(MARKER_FADE_DURATION).start();
     75         }
     76         mIsActive = true;
     77     }
     78 
     79     void inactivate(boolean immediate) {
     80         if (immediate) {
     81             mInactiveMarker.animate().cancel();
     82             mInactiveMarker.setAlpha(1f);
     83             mActiveMarker.animate().cancel();
     84             mActiveMarker.setAlpha(0f);
     85             mActiveMarker.setScaleX(0.5f);
     86             mActiveMarker.setScaleY(0.5f);
     87         } else {
     88             mInactiveMarker.animate().alpha(1f)
     89                     .setDuration(MARKER_FADE_DURATION).start();
     90             mActiveMarker.animate()
     91                     .alpha(0f)
     92                     .scaleX(0.5f)
     93                     .scaleY(0.5f)
     94                     .setDuration(MARKER_FADE_DURATION).start();
     95         }
     96         mIsActive = false;
     97     }
     98 
     99     boolean isActive() {
    100         return mIsActive;
    101     }
    102 }
    103