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
17package com.android.layoutlib.bridge.bars;
18
19import com.android.layoutlib.bridge.android.BridgeContext;
20import com.android.resources.Density;
21
22import android.util.DisplayMetrics;
23import android.view.View;
24import android.widget.LinearLayout;
25import android.widget.TextView;
26
27public 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
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
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
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
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
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
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
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