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.layoutlib.bridge.bars;
18 
19 import com.android.layoutlib.bridge.android.BridgeContext;
20 import com.android.resources.Density;
21 
22 import android.util.DisplayMetrics;
23 import android.view.View;
24 import android.widget.LinearLayout;
25 import android.widget.TextView;
26 
27 public class NavigationBar extends CustomBar {
28 
29     /** Navigation bar background color attribute name. */
30     private static final String ATTR_COLOR = "navigationBarColor";
31     /** Attribute for translucency property. */
32     public static final String ATTR_TRANSLUCENT = "windowTranslucentNavigation";
33     // These correspond to @dimen/navigation_side_padding in the system ui code.
34     private static final int PADDING_WIDTH_DEFAULT = 36;
35     private static final int PADDING_WIDTH_SW360 = 40;
36     private static final int PADDING_WIDTH_SW400 = 50;
37     // These corresponds to @dimen/navigation_key_width in the system ui code.
38     private static final int WIDTH_DEFAULT = 36;
39     private static final int WIDTH_SW360 = 40;
40     private static final int WIDTH_SW600 = 48;
41     protected static final String LAYOUT_XML = "/bars/navigation_bar.xml";
42     private static final String LAYOUT_600DP_XML = "/bars/navigation_bar600dp.xml";
43 
NavigationBar(BridgeContext context, Density density, int orientation, boolean isRtl, boolean rtlEnabled, int simulatedPlatformVersion)44     public NavigationBar(BridgeContext context, Density density, int orientation, boolean isRtl,
45       boolean rtlEnabled, int simulatedPlatformVersion) {
46         this(context, density, orientation, isRtl, rtlEnabled, simulatedPlatformVersion,
47           getShortestWidth(context)>= 600 ? LAYOUT_600DP_XML : LAYOUT_XML);
48     }
49 
NavigationBar(BridgeContext context, Density density, int orientation, boolean isRtl, boolean rtlEnabled, int simulatedPlatformVersion, String layoutPath)50     protected NavigationBar(BridgeContext context, Density density, int orientation, boolean isRtl,
51       boolean rtlEnabled, int simulatedPlatformVersion, String layoutPath) {
52         super(context, orientation, layoutPath, "navigation_bar.xml", simulatedPlatformVersion);
53 
54         int color = getBarColor(ATTR_COLOR, ATTR_TRANSLUCENT);
55         setBackgroundColor(color == 0 ? 0xFF000000 : color);
56 
57         // Cannot access the inside items through id because no R.id values have been
58         // created for them.
59         // We do know the order though.
60         // 0 is a spacer.
61         int back = 1;
62         int recent = 5;
63         if (orientation == LinearLayout.VERTICAL || (isRtl && !rtlEnabled)) {
64             // If RTL is enabled, then layoutlib mirrors the layout for us.
65             back = 5;
66             recent = 1;
67         }
68 
69         //noinspection SpellCheckingInspection
70         loadIcon(back, "ic_sysbar_back.png", density, isRtl);
71         //noinspection SpellCheckingInspection
72         loadIcon(3, "ic_sysbar_home.png", density, isRtl);
73         //noinspection SpellCheckingInspection
74         loadIcon(recent, "ic_sysbar_recent.png", density, isRtl);
75         setupNavBar(context, orientation);
76     }
77 
setupNavBar(BridgeContext context, int orientation)78     private void setupNavBar(BridgeContext context, int orientation) {
79         float sw = getShortestWidth(context);
80         View leftPadding = getChildAt(0);
81         View rightPadding = getChildAt(6);
82         setSize(context, leftPadding, orientation, getSidePadding(sw));
83         setSize(context, rightPadding, orientation, getSidePadding(sw));
84         int navButtonWidth = getWidth(sw);
85         for (int i = 1; i < 6; i += 2) {
86             View navButton = getChildAt(i);
87             setSize(context, navButton, orientation, navButtonWidth);
88         }
89         if (sw >= 600) {
90             setSize(context, getChildAt(2), orientation, 128);
91             setSize(context, getChildAt(4), orientation, 128);
92         }
93     }
94 
setSize(BridgeContext context, View view, int orientation, int size)95     private static void setSize(BridgeContext context, View view, int orientation, int size) {
96         size *= context.getMetrics().density;
97         LayoutParams layoutParams = (LayoutParams) view.getLayoutParams();
98         if (orientation == HORIZONTAL) {
99             layoutParams.width = size;
100         } else {
101             layoutParams.height = size;
102         }
103         view.setLayoutParams(layoutParams);
104     }
105 
getSidePadding(float sw)106     protected int getSidePadding(float sw) {
107         if (sw >= 400) {
108             return PADDING_WIDTH_SW400;
109         }
110         if (sw >= 360) {
111             return PADDING_WIDTH_SW360;
112         }
113         return PADDING_WIDTH_DEFAULT;
114     }
115 
getWidth(float sw)116     private static int getWidth(float sw) {
117         if (sw >= 600) {
118             return WIDTH_SW600;
119         }
120         if (sw >= 360) {
121             return WIDTH_SW360;
122         }
123         return WIDTH_DEFAULT;
124     }
125 
getShortestWidth(BridgeContext context)126     private static float getShortestWidth(BridgeContext context) {
127         DisplayMetrics metrics = context.getMetrics();
128         float sw = metrics.widthPixels < metrics.heightPixels ?
129                 metrics.widthPixels : metrics.heightPixels;
130         sw /= metrics.density;
131         return sw;
132     }
133 
134     @Override
135     protected TextView getStyleableTextView() {
136         return null;
137     }
138 }
139