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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.systemui.statusbar.phone;
18 
19 import android.content.Context;
20 import android.util.AttributeSet;
21 import android.view.View;
22 import android.widget.LinearLayout;
23 
24 import com.android.systemui.R;
25 
26 public class IconMerger extends LinearLayout {
27     private static final String TAG = "IconMerger";
28     private static final boolean DEBUG = false;
29 
30     private int mIconSize;
31     private View mMoreView;
32 
IconMerger(Context context, AttributeSet attrs)33     public IconMerger(Context context, AttributeSet attrs) {
34         super(context, attrs);
35 
36         mIconSize = context.getResources().getDimensionPixelSize(
37                 R.dimen.status_bar_icon_size);
38 
39         if (DEBUG) {
40             setBackgroundColor(0x800099FF);
41         }
42     }
43 
setOverflowIndicator(View v)44     public void setOverflowIndicator(View v) {
45         mMoreView = v;
46     }
47 
48     @Override
onMeasure(int widthMeasureSpec, int heightMeasureSpec)49     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
50         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
51         // we need to constrain this to an integral multiple of our children
52         int width = getMeasuredWidth();
53         setMeasuredDimension(width - (width % mIconSize), getMeasuredHeight());
54     }
55 
56     @Override
onLayout(boolean changed, int l, int t, int r, int b)57     protected void onLayout(boolean changed, int l, int t, int r, int b) {
58         super.onLayout(changed, l, t, r, b);
59         checkOverflow(r - l);
60     }
61 
checkOverflow(int width)62     private void checkOverflow(int width) {
63         if (mMoreView == null) return;
64 
65         final int N = getChildCount();
66         int visibleChildren = 0;
67         for (int i=0; i<N; i++) {
68             if (getChildAt(i).getVisibility() != GONE) visibleChildren++;
69         }
70         final boolean overflowShown = (mMoreView.getVisibility() == View.VISIBLE);
71         // let's assume we have one more slot if the more icon is already showing
72         if (overflowShown) visibleChildren --;
73         final boolean moreRequired = visibleChildren * mIconSize > width;
74         if (moreRequired != overflowShown) {
75             post(new Runnable() {
76                 @Override
77                 public void run() {
78                     mMoreView.setVisibility(moreRequired ? View.VISIBLE : View.GONE);
79                 }
80             });
81         }
82     }
83 }
84