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      1 /*
      2  * Copyright (C) 2015 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.layoutlib.bridge.bars;
     18 
     19 import com.android.layoutlib.bridge.android.BridgeContext;
     20 import com.android.resources.Density;
     21 
     22 import android.content.Context;
     23 import android.content.pm.ApplicationInfo;
     24 import android.util.AttributeSet;
     25 import android.view.View;
     26 import android.widget.LinearLayout;
     27 
     28 /**
     29  * Navigation Bar for the Theme Editor preview.
     30  *
     31  * For small bars, it is identical to {@link NavigationBar}.
     32  * But wide bars from {@link NavigationBar} are too wide for the Theme Editor preview.
     33  * To solve that problem, {@link ThemePreviewNavigationBar} use the layout for small bars,
     34  * and have no padding on the sides. That way, they have a similar look as the true ones,
     35  * and they fit in the Theme Editor preview.
     36  */
     37 public class ThemePreviewNavigationBar extends NavigationBar {
     38     private static final int PADDING_WIDTH_SW600 = 0;
     39 
     40     @SuppressWarnings("unused")
     41     public ThemePreviewNavigationBar(Context context, AttributeSet attrs) {
     42         super((BridgeContext) context,
     43                 Density.getEnum(((BridgeContext) context).getMetrics().densityDpi),
     44                 LinearLayout.HORIZONTAL, // In this mode, it doesn't need to be render vertically
     45                 ((BridgeContext) context).getConfiguration().getLayoutDirection() ==
     46                         View.LAYOUT_DIRECTION_RTL,
     47                 (context.getApplicationInfo().flags & ApplicationInfo.FLAG_SUPPORTS_RTL) != 0,
     48                 0, LAYOUT_XML);
     49     }
     50 
     51     @Override
     52     protected int getSidePadding(float sw) {
     53         if (sw >= 600) {
     54             return PADDING_WIDTH_SW600;
     55         }
     56         return super.getSidePadding(sw);
     57     }
     58 }
     59